{
  "data": {
    "a": {
      "slug": "cartesia-ink-stt",
      "name": "Cartesia Ink",
      "vendor": "Cartesia",
      "vendorUrl": "https://www.cartesia.ai",
      "kind": "model",
      "category": "speech-to-text",
      "summary": "Cartesia's hosted speech-to-text API. Ink 2 transcribes live audio in five languages over a WebSocket with built-in turn detection, and the older Ink Whisper model transcribes uploaded files in about 100 languages.",
      "url": "https://www.anchorterminal.com/tools/cartesia-ink-stt",
      "markdownUrl": "https://www.anchorterminal.com/tools/cartesia-ink-stt.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cartesia-ink-stt.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cartesia-ink-stt.json",
      "repo": "https://github.com/cartesia-ai/cartesia-python",
      "license": "Proprietary hosted service under the Cartesia Terms of Service. The Python and JavaScript SDKs are Apache-2.0",
      "transports": [
        "http",
        "websocket",
        "streamable-http"
      ],
      "remoteUrl": "https://api.cartesia.ai",
      "packages": [
        {
          "registry": "pypi",
          "name": "cartesia"
        },
        {
          "registry": "npm",
          "name": "@cartesia/cartesia-js"
        },
        {
          "registry": "pypi",
          "name": "cartesia-mcp"
        }
      ],
      "auth": "api-key",
      "authNotes": "Self-serve API key (`sk_car_...`) from the Playground at play.cartesia.ai/keys, sent as `Authorization: Bearer` or `X-API-Key`. Browser clients use an access token with an `stt` grant, valid for at most one hour, passed as the `access_token` query parameter on WebSockets. Usage and key-metadata endpoints need a separate admin key (https://docs.cartesia.ai/use-the-api/api-conventions).",
      "pricing": "freemium",
      "pricingNotes": "Billed in credits. `ink-2` costs 3 credits a second of audio on both realtime endpoints, silence included. `ink-whisper` costs 1 credit a second in realtime and 1 credit per 2 seconds in batch (https://docs.cartesia.ai/pricing). Plans are Free ($0, 20,000 credits a month), Pro ($5, 100,000), Startup ($49, 1.25 million) and Scale ($299, 8 million), so an agent's owner can start without a contract. Commercial use starts at Pro (https://www.cartesia.ai/pricing).",
      "priceSummary": "Freemium",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the docs index, the pricing pages or the STT reference (checked 2026-10-09).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 134,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-09"
      },
      "docsUrl": "https://docs.cartesia.ai/use-the-api/stt/compare-endpoints",
      "llmsTxt": "https://docs.cartesia.ai/llms.txt",
      "openapi": "https://docs.cartesia.ai/latest.yml",
      "capabilities": [
        "speech.stt",
        "speech.streaming",
        "speech.batch",
        "speech.languages"
      ],
      "tags": [
        "official",
        "hosted",
        "model",
        "closed-source",
        "streaming",
        "batch",
        "free-tier",
        "python",
        "typescript",
        "openapi",
        "llms-txt",
        "mcp",
        "status-page",
        "security-txt",
        "soc2",
        "enterprise"
      ],
      "lastRelease": "2026-09-17",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 67.9,
        "grade": "B",
        "agentReady": false,
        "rank": 238,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 9,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 74,
          "maintenance": 85,
          "payments": 35,
          "reliability": 73,
          "schema": 89,
          "security": 52,
          "transparency": 67
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-09"
        },
        "negative": 0,
        "verdict": "Ink 2 streams transcripts with turn detection built into the model, documented by an AsyncAPI file with typed ranges and structured errors. The terms, last revised 14 June 2024, let Cartesia train on inputs and outputs unless the customer opts out, and zero data retention is an Enterprise setting. Ink 2 has no batch endpoint and no diarisation.",
        "bestFor": "Suited to voice agents that need turn detection and transcription from one model in English, French, Hindi, Japanese or Spanish, and to teams already using Cartesia text-to-speech.",
        "strengths": [
          "`/stt/turns/websocket` emits `turn.start`, `turn.update`, `turn.eager_end`, `turn.resume` and `turn.end`, so no separate voice activity detector is needed",
          "OpenAPI and AsyncAPI files, llms.txt and Markdown twins of every docs page, with enums and numeric ranges on the WebSocket parameters",
          "Structured errors on `Cartesia-Version` 2026-03-01 and later, with `error_code`, `title`, `message`, `request_id` and an optional `doc_url`",
          "Short-lived access tokens (at most one hour) carry an `stt` grant, and admin keys are a separate key type from standard keys",
          "The status page lists Speech to Text in four regions, at 99.97% (US), 99.994% (EU and APAC) and 100% (AU) for July to October 2026"
        ],
        "weaknesses": [
          "The terms let Cartesia train models on inputs and outputs unless otherwise agreed. Opting out is a form in the Playground's data controls",
          "Zero data retention is an Enterprise plan setting, and no retention period for other plans was found in the terms, privacy policy or docs",
          "`ink-2` supports English, French, Hindi, Japanese and Spanish only and has no batch endpoint. `POST /stt` accepts `ink-whisper` only",
          "No diarisation or speaker labels in the reviewed documentation, and realtime input is raw mono PCM with `encoding` and `sample_rate` required",
          "The terms of 14 June 2024 forbid automation software (bots) and any robot or scraper that accesses the Services to collect data, which matters before any probe is run",
          "No SLA was found, and a 429 for exceeding the concurrency limit is documented without a `Retry-After` header or backoff guidance"
        ],
        "agentNotes": [
          "Use `wss://api.cartesia.ai/stt/turns/websocket` with `model=ink-2`, `encoding`, `sample_rate` and `cartesia_version=2026-08-14`. All four are required.",
          "Send raw mono audio in chunks of about 100 ms at the speed it was spoken. Pushing a whole file into the socket can return an internal server error.",
          "Read the final text from `turn.end` only. `transcript` is cumulative within a turn, so joining `turn.update` events duplicates text.",
          "Send `{\"type\": \"close\"}` after the last audio and keep reading until the server closes the socket, or the buffered tail is lost.",
          "Check `encoding` and `sample_rate` against the source before sending. The docs say the server might not return an error when they are wrong."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 67.9
          }
        ],
        "editorialScores": {
          "ergonomics": 74,
          "maintenance": 85,
          "payments": 35,
          "reliability": 73,
          "schema": 89,
          "security": 52,
          "transparency": 49
        },
        "provenanceScore": 84
      },
      "connect": {
        "install": "pip install 'cartesia[websockets]'   # or: npm install @cartesia/cartesia-js",
        "claudeCode": "claude mcp add --transport http --scope user cartesia https://mcp.cartesia.ai/mcp"
      },
      "letme": {
        "capability": "https://letme.dev/speech.stt",
        "tool": "https://letme.dev/cartesia-ink-stt"
      },
      "sameCompany": [
        "cartesia-tts",
        "cartesia-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Ink 2 realtime, Scale plan",
          "unit": "audio-minute",
          "usd": 0.0067,
          "note": "180 credits a minute at $299 for 8M credits. Cartesia quotes $0.39 an hour"
        },
        {
          "item": "Ink 2 realtime, Startup plan",
          "unit": "audio-minute",
          "usd": 0.0071,
          "note": "180 credits a minute at $49 for 1.25M credits"
        },
        {
          "item": "Ink 2 realtime, Pro plan",
          "unit": "audio-minute",
          "usd": 0.009,
          "note": "180 credits a minute at $5 for 100,000 credits"
        },
        {
          "item": "Ink Whisper realtime, Scale plan",
          "unit": "audio-minute",
          "usd": 0.0022,
          "note": "60 credits a minute at $299 for 8M credits"
        },
        {
          "item": "Ink Whisper batch, Scale plan",
          "unit": "audio-minute",
          "usd": 0.0011,
          "note": "30 credits a minute at $299 for 8M credits"
        }
      ],
      "provenance": {
        "legalEntity": "Cartesia AI, Inc.",
        "domain": "cartesia.ai",
        "domainRegistered": "2023-05-10",
        "endpointOnVendorDomain": true,
        "terms": "https://www.cartesia.ai/legal/terms",
        "privacy": "https://www.cartesia.ai/legal/privacy",
        "statusPage": "https://status.cartesia.ai",
        "changelog": "https://docs.cartesia.ai/changelog/2026",
        "securityTxt": "valid",
        "checked": "2026-10-09",
        "score": 84
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/cartesia-ink-stt.json",
      "live": {
        "slug": "cartesia-ink-stt",
        "probe": {
          "target": "https://api.cartesia.ai",
          "method": "get",
          "lastAt": "2026-10-10T04:40:45.083990044Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 78,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 69,
          "p95ms24h": 169,
          "samples24h": 133,
          "samples30d": 133,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 85,
              "ok": 85
            },
            {
              "date": "2026-10-10",
              "probes": 48,
              "ok": 48
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.cartesia.ai",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-10T04:40:44.924104901Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "cartesia-ai/cartesia-python",
            "version": "v4.2.0",
            "released": "2026-09-02",
            "seenAt": "2026-10-09T16:44:27.669680758Z"
          },
          {
            "registry": "npm",
            "name": "@cartesia/cartesia-js",
            "version": "4.2.0",
            "seenAt": "2026-10-09T16:44:25.845737197Z"
          },
          {
            "registry": "pypi",
            "name": "cartesia",
            "version": "4.2.0",
            "released": "2026-09-02",
            "seenAt": "2026-10-09T16:44:25.659263821Z"
          },
          {
            "registry": "pypi",
            "name": "cartesia-mcp",
            "version": "0.26.1",
            "released": "2026-10-08",
            "seenAt": "2026-10-09T16:44:26.977578193Z"
          }
        ],
        "githubStars": 134,
        "npmWeekly": 79696,
        "pypiWeekly": 205864,
        "pages": [
          {
            "url": "https://docs.cartesia.ai/changelog/2026",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-09T18:36:45.184290806Z",
            "changedAt": "2026-10-07T18:04:49.25388057Z",
            "fingerprint": "405fadad924b"
          },
          {
            "url": "https://docs.cartesia.ai/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-09T18:36:47.532132362Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "379a41a8bcf3"
          },
          {
            "url": "https://www.cartesia.ai/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-09T18:48:59.764022121Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "12bd9269bdef"
          },
          {
            "url": "https://www.cartesia.ai/legal/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-09T18:48:55.522982064Z",
            "changedAt": "2026-10-08T18:26:54.204830291Z",
            "fingerprint": "90fbd63881e5"
          },
          {
            "url": "https://www.cartesia.ai/legal/terms",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-09T18:48:57.753461207Z",
            "changedAt": "2026-10-08T18:26:56.591248396Z",
            "fingerprint": "2153bed03a23"
          }
        ],
        "updatedAt": "2026-10-10T04:40:45.083990044Z"
      }
    },
    "answer": "Cartesia Ink scores 67.9 (B) on agent readiness against Soniox Speech-to-Text's 58.2 (C), and leads in 5 of 7 scored categories. Soniox Speech-to-Text leads on security \u0026 auth and transparency \u0026 trust.",
    "b": {
      "slug": "soniox-stt",
      "name": "Soniox Speech-to-Text",
      "vendor": "Soniox",
      "vendorUrl": "https://soniox.com",
      "kind": "model",
      "category": "speech-to-text",
      "summary": "One multilingual model family for 60+ languages, as a real-time WebSocket API (`stt-rt-v5`) and an async file API (`stt-async-v5`).",
      "url": "https://www.anchorterminal.com/tools/soniox-stt",
      "markdownUrl": "https://www.anchorterminal.com/tools/soniox-stt.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/soniox-stt.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/soniox-stt.json",
      "repo": "https://github.com/soniox/soniox-python",
      "license": "Apache-2.0 (Python SDK)",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.soniox.com/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "@soniox/node"
        },
        {
          "registry": "pypi",
          "name": "soniox"
        }
      ],
      "auth": "api-key",
      "authNotes": "Bearer API key per project. Temporary API keys can be minted for browsers and mobile clients that stream straight to `wss://stt-rt.soniox.com`. Regional projects get their own keys and domains (EU, Japan, India).",
      "pricing": "usage",
      "pricingNotes": "Token-based pay-as-you-go. Async audio input $1.50 per 1M tokens and text in or out $3.50 per 1M, real-time $2.00 and $4.00. Soniox puts this at about $0.10 an hour async and $0.12 an hour real-time, with diarisation, language ID and translation included. New sign-ups have had no free credits since 2025-10-27 (https://soniox.com/pricing).",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 or machine payment in the docs or pricing. Billed to a funded account (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 12,
        "npmWeekly": 22200,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://soniox.com/docs/stt/get-started",
      "llmsTxt": "https://soniox.com/docs/llms.txt",
      "capabilities": [
        "speech.stt",
        "speech.streaming",
        "speech.batch",
        "speech.diarisation",
        "speech.languages",
        "speech.translation"
      ],
      "tags": [
        "hosted",
        "closed-source",
        "python",
        "typescript",
        "llms-txt",
        "webhooks",
        "async-jobs",
        "streaming",
        "batch",
        "enterprise"
      ],
      "lastRelease": "2026-08-11",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 58.2,
        "grade": "C",
        "agentReady": false,
        "rank": 586,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 13,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 70,
          "maintenance": 30,
          "payments": 20,
          "reliability": 65,
          "schema": 60,
          "security": 70,
          "transparency": 76
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "About $0.10 an hour async and $0.12 real time, with diarisation, language ID and translation included. No free credits for new accounts since October 2025.",
        "bestFor": "Price-led multilingual transcription and translation, live or async, and for operators who want no training and no retention.",
        "strengths": [
          "About $0.10 an hour async and $0.12 real time, with diarisation, language ID and translation included",
          "Customer audio and transcripts are never used for training, and nothing is retained by default",
          "SOC 2 Type 2 and ISO/IEC 27001:2022",
          "Regional deployments in the US, EU, Japan and India",
          "Per-request usage logs with cost and request IDs"
        ],
        "weaknesses": [
          "No free credits for new accounts since October 2025",
          "No OpenAPI or AsyncAPI file",
          "No documented status code, Retry-After or backoff for rate limits",
          "10 concurrent streams and a fixed 300-minute cap per stream or file",
          "No STT changelog entry since June 2026"
        ],
        "agentNotes": [
          "Pass `audio_url` for public files and skip the upload step. Delete uploaded files or they count against the 10 GB quota for 30 days",
          "Use the `context` field for names and domain terms",
          "Buffer audio while the WebSocket connects, then flush it after the config message",
          "Split anything over 300 minutes. The cap is fixed",
          "Set `client_reference_id` so failed or duplicate requests can be traced in the usage log"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 58.2
          }
        ],
        "editorialScores": {
          "ergonomics": 70,
          "maintenance": 30,
          "payments": 20,
          "reliability": 65,
          "schema": 60,
          "security": 70,
          "transparency": 70
        },
        "provenanceScore": 81
      },
      "connect": {
        "http": "curl https://api.soniox.com/v1/transcriptions -H \"Authorization: Bearer $SONIOX_API_KEY\" \\\n  -H \"content-type: application/json\" \\\n  -d '{\"model\":\"stt-async-v5\",\"audio_url\":\"https://soniox.com/media/examples/coffee_shop.mp3\",\"enable_speaker_diarization\":true}'"
      },
      "letme": {
        "capability": "https://letme.dev/speech.stt",
        "tool": "https://letme.dev/soniox-stt"
      },
      "sameCompany": [
        "soniox-tts",
        "soniox-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "stt-async-v5",
          "unit": "audio-minute",
          "usd": 0.0017,
          "note": "Soniox's estimate of $0.10 an hour, token-billed"
        },
        {
          "item": "stt-rt-v5 streaming",
          "unit": "audio-minute",
          "usd": 0.002,
          "note": "Soniox's estimate of $0.12 an hour, token-billed"
        }
      ],
      "provenance": {
        "legalEntity": "Soniox Inc.",
        "domain": "soniox.com",
        "domainRegistered": "2020-03-23",
        "endpointOnVendorDomain": true,
        "terms": "https://soniox.com/policies/terms-of-service",
        "privacy": "https://soniox.com/policies/privacy-policy",
        "statusPage": "https://status.soniox.com",
        "changelog": "https://soniox.com/docs/stt/models",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Terms and privacy policy last updated 2026-06-29. The company address is Foster City, California"
        ],
        "score": 81
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/soniox-stt.json",
      "live": {
        "slug": "soniox-stt",
        "probe": {
          "target": "https://api.soniox.com/v1",
          "method": "get",
          "lastAt": "2026-10-10T04:41:04.738993295Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 248,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 255,
          "p95ms24h": 330,
          "samples24h": 248,
          "samples30d": 2484,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 268,
              "ok": 268
            },
            {
              "date": "2026-10-09",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-10",
              "probes": 48,
              "ok": 48
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.soniox.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-10T00:51:16.660447725Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "@soniox/node",
            "version": "2.3.0",
            "seenAt": "2026-10-09T17:20:59.336988665Z"
          },
          {
            "registry": "pypi",
            "name": "soniox",
            "version": "2.10.0",
            "released": "2026-10-02",
            "seenAt": "2026-10-09T17:21:00.345412388Z"
          }
        ],
        "githubStars": 12,
        "npmWeekly": 21808,
        "pypiWeekly": 105310,
        "securityTxt": {
          "url": "https://soniox.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-09T15:39:43.967837123Z"
        },
        "llmsTxt": {
          "url": "https://soniox.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-09T14:02:48.135372421Z"
        },
        "domain": {
          "domain": "soniox.com",
          "registered": "2020-03-23",
          "source": "https://rdap.verisign.com/com/v1/domain/soniox.com",
          "checkedAt": "2026-10-04T13:05:00.531232044Z"
        },
        "pages": [
          {
            "url": "https://soniox.com/blog/2025-10-27-free-credits-update-for-soniox-api",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-09T18:45:34.935312834Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "84edd3460b10"
          },
          {
            "url": "https://soniox.com/docs/stt/models",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-09T18:45:37.17821404Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "bc23abf2e34e"
          },
          {
            "url": "https://soniox.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-09T18:45:45.681562706Z",
            "changedAt": "2026-10-02T15:24:18.034370139Z",
            "fingerprint": "3c5bced7754b"
          },
          {
            "url": "https://soniox.com/policies/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-09T18:45:41.118704336Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "f8449bf14df5"
          },
          {
            "url": "https://soniox.com/policies/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-09T18:45:43.298495478Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "1ab8c9d50b68"
          }
        ],
        "updatedAt": "2026-10-10T04:41:04.738993295Z"
      }
    },
    "facts": [
      {
        "a": "Model API",
        "b": "Model API",
        "name": "Kind"
      },
      {
        "a": "Cartesia",
        "b": "Soniox",
        "name": "Vendor"
      },
      {
        "a": "https://api.cartesia.ai",
        "b": "https://api.soniox.com/v1",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, websocket, Streamable HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "not published",
        "b": "$0.0017 per minute of audio",
        "name": "Price for speech-to-text"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary hosted service under the Cartesia Terms of Service. The Python and JavaScript SDKs are Apache-2.0",
        "b": "Apache-2.0 (Python SDK)",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-09-17",
        "b": "2026-08-11",
        "name": "Last release"
      },
      {
        "a": "2024-06-14",
        "b": "2026-06-29",
        "name": "Terms last updated"
      },
      {
        "a": "2024-06-14",
        "b": "2026-06-29",
        "name": "Privacy policy last updated"
      },
      {
        "a": "yes, with an opt-out",
        "b": "not found in the text",
        "name": "Customer content may train models"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "134 stars",
        "b": "12 stars, 22k npm/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "3.5/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Cartesia Ink scores 67.9 (B) on agent readiness against Soniox Speech-to-Text's 58.2 (C), and leads in 5 of 7 scored categories. Soniox Speech-to-Text leads on security \u0026 auth and transparency \u0026 trust.",
        "question": "Which is better for AI agents, Cartesia Ink or Soniox Speech-to-Text?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do Cartesia Ink and Soniox Speech-to-Text need an API key?"
      },
      {
        "answer": "Yes. Cartesia Ink has a hosted endpoint at https://api.cartesia.ai and Soniox Speech-to-Text at https://api.soniox.com/v1.",
        "question": "Can an agent call Cartesia Ink and Soniox Speech-to-Text without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 73 against 65",
          "Schema \u0026 documentation, 89 against 60",
          "Payments \u0026 pricing, 35 against 20",
          "Maintenance \u0026 community, 85 against 30"
        ],
        "also": null,
        "goodFor": "Suited to voice agents that need turn detection and transcription from one model in English, French, Hindi, Japanese or Spanish, and to teams already using Cartesia text-to-speech.",
        "slug": "cartesia-ink-stt",
        "watchFor": "The terms let Cartesia train models on inputs and outputs unless otherwise agreed. Opting out is a form in the Playground's data controls"
      },
      {
        "aheadOn": [
          "Security \u0026 auth, 70 against 52",
          "Transparency \u0026 trust, 76 against 67"
        ],
        "also": null,
        "goodFor": "Price-led multilingual transcription and translation, live or async, and for operators who want no training and no retention.",
        "slug": "soniox-stt",
        "watchFor": "No free credits for new accounts since October 2025"
      }
    ],
    "job": {
      "capability": "speech.stt",
      "name": "Speech-to-text"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-cartesia-ink-stt.json",
        "title": "Amazon Transcribe vs Cartesia Ink",
        "url": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-cartesia-ink-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-soniox-stt.json",
        "title": "Amazon Transcribe vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-cartesia-ink-stt.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Cartesia Ink",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-cartesia-ink-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-soniox-stt.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-cartesia-ink-stt.json",
        "title": "Azure AI Speech speech-to-text vs Cartesia Ink",
        "url": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-cartesia-ink-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-soniox-stt.json",
        "title": "Azure AI Speech speech-to-text vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-deepgram-stt.json",
        "title": "Cartesia Ink vs Deepgram Speech-to-Text (Nova-3, Flux)",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-deepgram-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-elevenlabs-scribe.json",
        "title": "Cartesia Ink vs ElevenLabs Scribe Speech to Text API",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-elevenlabs-scribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-gladia-stt.json",
        "title": "Cartesia Ink vs Gladia Speech-to-Text API + MCP",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-gladia-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-google-speech-to-text.json",
        "title": "Cartesia Ink vs Google Cloud Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-google-speech-to-text"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-groq-speech-to-text.json",
        "title": "Cartesia Ink vs Groq Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-groq-speech-to-text"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-mistral-voxtral-transcribe.json",
        "title": "Cartesia Ink vs Mistral Voxtral Transcribe",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-mistral-voxtral-transcribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-openai-speech-to-text.json",
        "title": "Cartesia Ink vs OpenAI Speech to Text",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-openai-speech-to-text"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-rev-ai-stt.json",
        "title": "Cartesia Ink vs Rev AI Speech-to-Text API",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-rev-ai-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-speechmatics-stt.json",
        "title": "Cartesia Ink vs Speechmatics Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-speechmatics-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepgram-stt-vs-soniox-stt.json",
        "title": "Deepgram Speech-to-Text (Nova-3, Flux) vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/deepgram-stt-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-soniox-stt.json",
        "title": "ElevenLabs Scribe Speech to Text API vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-soniox-stt.json",
        "title": "Gladia Speech-to-Text API + MCP vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/google-speech-to-text-vs-soniox-stt.json",
        "title": "Google Cloud Speech-to-Text vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/google-speech-to-text-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-soniox-stt.json",
        "title": "Groq Speech-to-Text vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-soniox-stt.json",
        "title": "Mistral Voxtral Transcribe vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-speech-to-text-vs-soniox-stt.json",
        "title": "OpenAI Speech to Text vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/openai-speech-to-text-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/rev-ai-stt-vs-soniox-stt.json",
        "title": "Rev AI Speech-to-Text API vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/rev-ai-stt-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/soniox-stt-vs-speechmatics-stt.json",
        "title": "Soniox Speech-to-Text vs Speechmatics Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/soniox-stt-vs-speechmatics-stt"
      }
    ],
    "scores": [
      {
        "by": 8,
        "cartesia-ink-stt": 73,
        "edge": "cartesia-ink-stt",
        "key": "reliability",
        "name": "Reliability",
        "soniox-stt": 65,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 29,
        "cartesia-ink-stt": 89,
        "edge": "cartesia-ink-stt",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "soniox-stt": 60,
        "weight": 13
      },
      {
        "by": 4,
        "cartesia-ink-stt": 74,
        "edge": "cartesia-ink-stt",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "soniox-stt": 70,
        "weight": 13
      },
      {
        "by": 18,
        "cartesia-ink-stt": 52,
        "edge": "soniox-stt",
        "key": "security",
        "name": "Security \u0026 auth",
        "soniox-stt": 70,
        "weight": 14
      },
      {
        "by": 15,
        "cartesia-ink-stt": 35,
        "edge": "cartesia-ink-stt",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "soniox-stt": 20,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 55,
        "cartesia-ink-stt": 85,
        "edge": "cartesia-ink-stt",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "soniox-stt": 30,
        "weight": 7
      },
      {
        "by": 9,
        "cartesia-ink-stt": 67,
        "edge": "soniox-stt",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "soniox-stt": 76,
        "weight": 7
      }
    ],
    "summary": "Cartesia Ink scores 67.9 (B) on agent readiness against Soniox Speech-to-Text's 58.2 (C), and leads in 5 of 7 scored categories. Soniox Speech-to-Text leads on security \u0026 auth and transparency \u0026 trust. Both do speech-to-text.",
    "verdicts": {
      "cartesia-ink-stt": "Ink 2 streams transcripts with turn detection built into the model, documented by an AsyncAPI file with typed ranges and structured errors. The terms, last revised 14 June 2024, let Cartesia train on inputs and outputs unless the customer opts out, and zero data retention is an Enterprise setting. Ink 2 has no batch endpoint and no diarisation.",
      "soniox-stt": "About $0.10 an hour async and $0.12 real time, with diarisation, language ID and translation included. No free credits for new accounts since October 2025."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-soniox-stt",
    "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-soniox-stt.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-soniox-stt.md",
    "slim": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-soniox-stt.min.md"
  },
  "markdown": "Cartesia Ink scores 67.9 (B) on agent readiness against Soniox Speech-to-Text's 58.2 (C), and leads in 5 of 7 scored categories. Soniox Speech-to-Text leads on security \u0026 auth and transparency \u0026 trust. Both do speech-to-text.\n\n- Cartesia Ink: grade B, 67.9/100, rank #238 of 950. Markdown https://www.anchorterminal.com/tools/cartesia-ink-stt.md · JSON https://www.anchorterminal.com/api/v1/tools/cartesia-ink-stt.json\n- Soniox Speech-to-Text: grade C, 58.2/100, rank #586 of 950. Markdown https://www.anchorterminal.com/tools/soniox-stt.md · JSON https://www.anchorterminal.com/api/v1/tools/soniox-stt.json\n- Best speech-to-text APIs for AI agents: https://www.anchorterminal.com/best/speech-to-text/index.md\n- All 91 stt comparisons: https://www.anchorterminal.com/compare/speech-to-text/index.md\n\n## Which one, for what\n\n### Cartesia Ink (B)\n\nGood for: Suited to voice agents that need turn detection and transcription from one model in English, French, Hindi, Japanese or Spanish, and to teams already using Cartesia text-to-speech.\n\nAhead on:\n- Reliability, 73 against 65\n- Schema \u0026 documentation, 89 against 60\n- Payments \u0026 pricing, 35 against 20\n- Maintenance \u0026 community, 85 against 30\n\nWatch for: The terms let Cartesia train models on inputs and outputs unless otherwise agreed. Opting out is a form in the Playground's data controls\n\n### Soniox Speech-to-Text (C)\n\nGood for: Price-led multilingual transcription and translation, live or async, and for operators who want no training and no retention.\n\nAhead on:\n- Security \u0026 auth, 70 against 52\n- Transparency \u0026 trust, 76 against 67\n\nWatch for: No free credits for new accounts since October 2025\n\n\n## Score by category\n\n| Category | Weight | Cartesia Ink | Soniox Speech-to-Text | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 73 | 65 | Cartesia Ink +8 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 89 | 60 | Cartesia Ink +29 |\n| Agent ergonomics | 13% (16.2 this run) | 74 | 70 | Cartesia Ink +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 52 | 70 | Soniox Speech-to-Text +18 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 20 | Cartesia Ink +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 85 | 30 | Cartesia Ink +55 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 67 | 76 | Soniox Speech-to-Text +9 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **67.9 · B** | **58.2 · C** | |\n\n## Facts side by side\n\n| Fact | Cartesia Ink | Soniox Speech-to-Text |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Cartesia | Soniox |\n| Hosted endpoint | `https://api.cartesia.ai` | `https://api.soniox.com/v1` |\n| Transports | HTTP, websocket, Streamable HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Pay per use |\n| Price for speech-to-text | not published | $0.0017 per minute of audio |\n| x402 | no | no |\n| Licence | Proprietary hosted service under the Cartesia Terms of Service. The Python and JavaScript SDKs are Apache-2.0 | Apache-2.0 (Python SDK) |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-17 | 2026-08-11 |\n| Terms last updated | 2024-06-14 | 2026-06-29 |\n| Privacy policy last updated | 2024-06-14 | 2026-06-29 |\n| Customer content may train models | yes, with an opt-out | not found in the text |\n| Terms restrict automated access | yes | not found in the text |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 134 stars | 12 stars, 22k npm/wk |\n| Agent reviews | none | 3.5/5 (2) |\n\n## Verdicts\n\n**Cartesia Ink.** Ink 2 streams transcripts with turn detection built into the model, documented by an AsyncAPI file with typed ranges and structured errors. The terms, last revised 14 June 2024, let Cartesia train on inputs and outputs unless the customer opts out, and zero data retention is an Enterprise setting. Ink 2 has no batch endpoint and no diarisation.\n\n**Soniox Speech-to-Text.** About $0.10 an hour async and $0.12 real time, with diarisation, language ID and translation included. No free credits for new accounts since October 2025.\n\n## Before you call either\n\n### Cartesia Ink\n\n1. Use `wss://api.cartesia.ai/stt/turns/websocket` with `model=ink-2`, `encoding`, `sample_rate` and `cartesia_version=2026-08-14`. All four are required.\n2. Send raw mono audio in chunks of about 100 ms at the speed it was spoken. Pushing a whole file into the socket can return an internal server error.\n3. Read the final text from `turn.end` only. `transcript` is cumulative within a turn, so joining `turn.update` events duplicates text.\n4. Send `{\"type\": \"close\"}` after the last audio and keep reading until the server closes the socket, or the buffered tail is lost.\n5. Check `encoding` and `sample_rate` against the source before sending. The docs say the server might not return an error when they are wrong.\n\n### Soniox Speech-to-Text\n\n1. Pass `audio_url` for public files and skip the upload step. Delete uploaded files or they count against the 10 GB quota for 30 days\n2. Use the `context` field for names and domain terms\n3. Buffer audio while the WebSocket connects, then flush it after the config message\n4. Split anything over 300 minutes. The cap is fixed\n5. Set `client_reference_id` so failed or duplicate requests can be traced in the usage log\n\n## Questions\n\n### Which is better for AI agents, Cartesia Ink or Soniox Speech-to-Text?\n\nCartesia Ink scores 67.9 (B) on agent readiness against Soniox Speech-to-Text's 58.2 (C), and leads in 5 of 7 scored categories. Soniox Speech-to-Text leads on security \u0026 auth and transparency \u0026 trust.\n\n### Do Cartesia Ink and Soniox Speech-to-Text need an API key?\n\nBoth need an API key.\n\n### Can an agent call Cartesia Ink and Soniox Speech-to-Text without installing anything?\n\nYes. Cartesia Ink has a hosted endpoint at https://api.cartesia.ai and Soniox Speech-to-Text at https://api.soniox.com/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-soniox-stt.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-soniox-stt.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"cartesia-ink-stt\", \"b\": \"soniox-stt\"}`. From a terminal: `anchor compare cartesia-ink-stt soniox-stt`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/cartesia-ink-stt.json and https://www.anchorterminal.com/api/v1/tools/soniox-stt.json\n\n## Other comparisons with Cartesia Ink or Soniox Speech-to-Text\n\n- [Amazon Transcribe vs Cartesia Ink](https://www.anchorterminal.com/compare/amazon-transcribe-vs-cartesia-ink-stt.md)\n- [Amazon Transcribe vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/amazon-transcribe-vs-soniox-stt.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Cartesia Ink](https://www.anchorterminal.com/compare/assemblyai-stt-vs-cartesia-ink-stt.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/assemblyai-stt-vs-soniox-stt.md)\n- [Azure AI Speech speech-to-text vs Cartesia Ink](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-cartesia-ink-stt.md)\n- [Azure AI Speech speech-to-text vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-soniox-stt.md)\n- [Cartesia Ink vs Deepgram Speech-to-Text (Nova-3, Flux)](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-deepgram-stt.md)\n- [Cartesia Ink vs ElevenLabs Scribe Speech to Text API](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-elevenlabs-scribe.md)\n- [Cartesia Ink vs Gladia Speech-to-Text API + MCP](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-gladia-stt.md)\n- [Cartesia Ink vs Google Cloud Speech-to-Text](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-google-speech-to-text.md)\n- [Cartesia Ink vs Groq Speech-to-Text](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-groq-speech-to-text.md)\n- [Cartesia Ink vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-mistral-voxtral-transcribe.md)\n- [Cartesia Ink vs OpenAI Speech to Text](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-openai-speech-to-text.md)\n- [Cartesia Ink vs Rev AI Speech-to-Text API](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-rev-ai-stt.md)\n- [Cartesia Ink vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-speechmatics-stt.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/deepgram-stt-vs-soniox-stt.md)\n- [ElevenLabs Scribe Speech to Text API vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-soniox-stt.md)\n- [Gladia Speech-to-Text API + MCP vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/gladia-stt-vs-soniox-stt.md)\n- [Google Cloud Speech-to-Text vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/google-speech-to-text-vs-soniox-stt.md)\n- [Groq Speech-to-Text vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/groq-speech-to-text-vs-soniox-stt.md)\n- [Mistral Voxtral Transcribe vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-soniox-stt.md)\n- [OpenAI Speech to Text vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/openai-speech-to-text-vs-soniox-stt.md)\n- [Rev AI Speech-to-Text API vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/rev-ai-stt-vs-soniox-stt.md)\n- [Soniox Speech-to-Text vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/soniox-stt-vs-speechmatics-stt.md)\n",
  "meta": {
    "attribution": "Anchor Terminal (https://www.anchorterminal.com)",
    "docs": "https://www.anchorterminal.com/docs/",
    "generatedAt": "2026-10-10",
    "license": "CC-BY-4.0",
    "method": "https://www.anchorterminal.com/benchmark/",
    "methodology": "0.4",
    "openapi": "https://www.anchorterminal.com/openapi.json",
    "preview": false,
    "run": "2026-10-01",
    "runLabel": "October 2026 research run"
  },
  "page": {
    "breadcrumbs": [
      {
        "name": "Home",
        "url": "https://www.anchorterminal.com/"
      },
      {
        "name": "Compare",
        "url": "https://www.anchorterminal.com/compare/"
      },
      {
        "name": "Cartesia Ink vs Soniox Speech-to-Text",
        "url": ""
      }
    ],
    "description": "Cartesia Ink scores 67.9 (B) to Soniox Speech-to-Text's 58.2 (C) for speech-to-text. Prices, MCP, x402, uptime and agent notes side by side.",
    "facts": [
      "Cartesia Ink B 67.9",
      "Soniox Speech-to-Text C 58.2",
      "scores"
    ],
    "h1": "Cartesia Ink vs Soniox Speech-to-Text",
    "image": "https://www.anchorterminal.com/assets/og/compare-cartesia-ink-stt-vs-soniox-stt.png",
    "path": "/compare/cartesia-ink-stt-vs-soniox-stt",
    "published": "2026-10-01",
    "section": "tools",
    "title": "Cartesia Ink vs Soniox Speech-to-Text for AI agents (2026)",
    "toc": null,
    "updated": "2026-10-09",
    "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-soniox-stt"
  },
  "tokens": {
    "markdown": 2650,
    "slim": 730
  },
  "version": 1
}