{
  "data": {
    "a": {
      "slug": "assemblyai-voice-agent",
      "name": "AssemblyAI Voice Agent API",
      "vendor": "AssemblyAI, Inc.",
      "vendorUrl": "https://www.assemblyai.com",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "AssemblyAI's Voice Agent API runs a spoken conversation over one WebSocket, combining its own speech-to-text, language model and text-to-speech. Agents are stored through a REST API and reached from a browser, a server or an inbound Twilio SIP number.",
      "url": "https://www.anchorterminal.com/tools/assemblyai-voice-agent",
      "markdownUrl": "https://www.anchorterminal.com/tools/assemblyai-voice-agent.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/assemblyai-voice-agent.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/assemblyai-voice-agent.json",
      "repo": "https://github.com/AssemblyAI/voice-agent-starter-python",
      "license": "Proprietary service under AssemblyAI's Terms of Service. The two starter repositories on GitHub carry no licence file",
      "transports": [
        "http"
      ],
      "remoteUrl": "wss://agents.assemblyai.com/v1/ws",
      "packages": [],
      "auth": "api-key",
      "authNotes": "Self-serve API key from the dashboard, sent in the `Authorization` header on REST calls and on the WebSocket upgrade, with or without a `Bearer` prefix. Keys belong to a project and can be created and deleted in the dashboard (2 on the free plan, 4 on pay as you go, 25 on a contract). No scopes or expiry were found. Browser clients use a one-time token from `GET /v1/token`, redeemable within 1 to 600 seconds and passed as the `token` query parameter.",
      "pricing": "usage",
      "pricingNotes": "$4.50 an hour ($0.075 a minute), billed per second from socket open to session end, idle time included. The rate covers speech-to-text, the managed model, speech output, recordings and hosting. New accounts get $50 of credit with no card, which covers the Voice Agent API. LLM Gateway tokens and Twilio carrier minutes are billed separately. Volume pricing is by sales contact (https://www.assemblyai.com/pricing, https://www.assemblyai.com/docs/billing-and-pricing, checked 2026-10-09).",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the Voice Agent docs, the two API description files, the billing docs or the pricing page. Payment is by card into a prepaid balance (checked 2026-10-09).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-09"
      },
      "docsUrl": "https://www.assemblyai.com/docs/voice-agents/voice-agent-api",
      "llmsTxt": "https://www.assemblyai.com/docs/llms.txt",
      "openapi": "https://www.assemblyai.com/docs/api-reference/specs/voice-agent-api.yaml",
      "capabilities": [
        "voice.agent",
        "voice.pipeline",
        "voice.tools",
        "voice.telephony"
      ],
      "tags": [
        "hosted",
        "no-card",
        "closed-source",
        "llms-txt",
        "webhooks",
        "streaming",
        "pipeline",
        "python",
        "javascript",
        "status-page",
        "soc2"
      ],
      "lastRelease": "2026-08-26",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 64.4,
        "grade": "B",
        "agentReady": false,
        "rank": 351,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 4,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 72,
          "maintenance": 64,
          "payments": 40,
          "reliability": 60,
          "schema": 83,
          "security": 62,
          "transparency": 66
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-09"
        },
        "negative": 0,
        "verdict": "One $0.075 a minute rate covers speech-to-text, the managed model, speech output, recordings and hosting, and the socket has an AsyncAPI file, typed error codes and a 30-second resume window. No concurrent-session limit is published, the status page has no Voice Agent component, and phone calls are inbound only through a Twilio trunk the customer owns.",
        "bestFor": "A developer who wants one managed pipeline at a flat rate and is content with AssemblyAI's own speech models and voices, with an optional model of their own.",
        "strengths": [
          "One published rate of $4.50 an hour ($0.075 a minute), billed per second, with $50 of credit and no card for new accounts",
          "AsyncAPI 3.0 file for the socket, an OpenAPI file for the token endpoint, llms.txt and a Markdown copy of every docs page",
          "Session errors carry a code, a message and sometimes the offending field, and the docs name the three codes that are safe to retry",
          "HTTP tool header values are write-only and encrypted at rest, and tool calls are limited to public `https` hosts with redirects refused",
          "Every session is stored with a stereo recording, a JSON timeline of turns and tool calls, and signed webhooks with a delivery history"
        ],
        "weaknesses": [
          "No number is published for the concurrent-session limit that the `concurrency_exceeded` error enforces",
          "status.assemblyai.com lists the Asynchronous API, Streaming API and LLM Gateway, with no Voice Agent component",
          "Telephony is inbound only, over a SIP trunk on a Twilio account the customer owns",
          "API keys have no scopes or expiry, and opting out of model training needs a paid plan",
          "The Terms of Service bar benchmarking and competitive analysis (2.4(f)) and any automated or programmatic method of extracting data or Output (4.4), which matters before any probe is run"
        ],
        "agentNotes": [
          "Send `session.end` before closing the socket. Without it the session stays resumable, and billed, for 30 seconds",
          "Retry only `at_capacity`, `concurrency_exceeded` and `internal_error`, with backoff. Every other session error code is fatal",
          "Send `tool.result` inside the `reply.done` handler, not straight after `tool.call`",
          "Mint a one-time token with `GET /v1/token` for browser clients and never ship the API key to a page",
          "Deduplicate webhooks on `event_id`, and verify `X-AAI-Signature` against the raw body bytes because a 401 is not retried"
        ],
        "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": 64.4
          }
        ],
        "editorialScores": {
          "ergonomics": 72,
          "maintenance": 64,
          "payments": 40,
          "reliability": 60,
          "schema": 83,
          "security": 62,
          "transparency": 51
        },
        "provenanceScore": 81
      },
      "connect": {
        "install": "git clone https://github.com/AssemblyAI/voice-agent-starter-python",
        "http": "curl -X POST https://agents.assemblyai.com/v1/agents \\\n  -H \"Authorization: $ASSEMBLYAI_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"name\": \"Support Assistant\", \"system_prompt\": \"You are a friendly support agent.\", \"greeting\": \"Hi, how can I help?\", \"voice\": {\"voice_id\": \"alba\"}}'",
        "claudeCode": "claude mcp add --transport http --scope user assemblyai-docs https://mcp.assemblyai.com/docs"
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/assemblyai-voice-agent"
      },
      "sameCompany": [
        "assemblyai-stt"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Voice Agent session",
          "unit": "call-minute",
          "usd": 0.075,
          "note": "$4.50 an hour billed per second of open socket. Speech-to-text, managed model, speech output and recordings included. LLM Gateway tokens and carrier minutes extra"
        }
      ],
      "provenance": {
        "legalEntity": "AssemblyAI, Inc.",
        "domain": "assemblyai.com",
        "domainRegistered": "2016-12-24",
        "endpointOnVendorDomain": true,
        "terms": "https://www.assemblyai.com/legal/terms-of-service",
        "privacy": "https://www.assemblyai.com/legal/privacy-policy",
        "statusPage": "https://status.assemblyai.com",
        "changelog": "https://www.assemblyai.com/changelog",
        "securityTxt": "unknown",
        "checked": "2026-10-09",
        "score": 81
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/assemblyai-voice-agent.json",
      "live": {
        "slug": "assemblyai-voice-agent",
        "probe": {
          "target": "wss://agents.assemblyai.com/v1/ws",
          "method": "get",
          "lastAt": "2026-10-10T02:54:46.844166109Z",
          "lastOk": false,
          "lastStatus": 0,
          "lastMs": 0,
          "lastNote": "unsupported protocol scheme \"wss\"",
          "authRequired": false,
          "uptime24h": 0,
          "uptime30d": 0,
          "p50ms24h": 0,
          "p95ms24h": 0,
          "samples24h": 115,
          "samples30d": 115,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 85,
              "ok": 0
            },
            {
              "date": "2026-10-10",
              "probes": 30,
              "ok": 0
            }
          ],
          "outages": [
            {
              "start": "2026-10-09T15:42:56.660671906Z",
              "end": "0001-01-01T00:00:00Z",
              "note": "unsupported protocol scheme \"wss\""
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.assemblyai.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-10T02:49:55.908212561Z"
        },
        "githubStars": 3,
        "pages": [
          {
            "url": "https://www.assemblyai.com/docs/billing-and-pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-09T18:48:16.435584974Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "3b80ad9644cf"
          }
        ],
        "updatedAt": "2026-10-10T02:54:46.844166109Z"
      }
    },
    "answer": "AssemblyAI Voice Agent API scores 64.4 (B) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 5 of 7 scored categories. Hume EVI (Empathic Voice Interface) leads on schema \u0026 documentation.",
    "b": {
      "slug": "hume-evi",
      "name": "Hume EVI (Empathic Voice Interface)",
      "vendor": "Hume AI",
      "vendorUrl": "https://www.hume.ai",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "Hume's hosted voice-agent service, accessed through a WebSocket API.",
      "url": "https://www.anchorterminal.com/tools/hume-evi",
      "markdownUrl": "https://www.anchorterminal.com/tools/hume-evi.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/hume-evi.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/hume-evi.json",
      "repo": "https://github.com/HumeAI/hume-python-sdk",
      "license": "MIT (SDKs)",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.hume.ai/v0/evi",
      "packages": [
        {
          "registry": "npm",
          "name": "hume"
        },
        {
          "registry": "pypi",
          "name": "hume"
        },
        {
          "registry": "npm",
          "name": "@humeai/voice-react"
        }
      ],
      "auth": "mixed",
      "authNotes": "`X-Hume-Api-Key` header for REST. The chat WebSocket takes `api_key` or a short-lived `access_token` in the query string. The Twilio webhook URL carries the API key as a query parameter.",
      "pricing": "freemium",
      "pricingNotes": "Free includes 5 EVI minutes a month and 1 concurrent connection. Starter $3 40 minutes, Creator $14 ($7 first month) 200 minutes, Pro $70 1,200 minutes then $0.06 a minute, Scale $200 5,000 then $0.05, Business $500 12,500 then $0.04. External LLM usage is billed on top. Free and Starter are non-commercial (https://www.hume.ai/pricing).",
      "priceSummary": "$14 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 or machine payment in the docs or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 180,
        "npmWeekly": 79177,
        "pypiWeekly": 23750,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://dev.hume.ai/docs/speech-to-speech-evi/overview",
      "llmsTxt": "https://dev.hume.ai/llms.txt",
      "openapi": "https://dev.hume.ai/openapi/speech-to-speech-evi.json",
      "capabilities": [
        "voice.agent",
        "voice.speech-to-speech",
        "voice.pipeline",
        "voice.tools",
        "voice.telephony"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "closed-source",
        "python",
        "typescript",
        "llms-txt",
        "speech-to-speech",
        "pipeline",
        "streaming",
        "websocket",
        "webhooks",
        "enterprise",
        "status-page"
      ],
      "lastRelease": "2026-08-18",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 56.7,
        "grade": "C",
        "agentReady": false,
        "rank": 626,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 10,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 66,
          "maintenance": 65,
          "payments": 37,
          "reliability": 55,
          "schema": 90,
          "security": 27,
          "transparency": 61
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Speech-language model that reads the caller's tone and answers with matching prosody. One account-wide key, sent in the WebSocket and Twilio webhook URLs. Hume ends API access on 13 November 2026.",
        "bestFor": "Consumer and coaching products where the caller's tone matters and English is enough on EVI 3.",
        "strengths": [
          "Speech-language model that reads the caller's tone and answers with matching prosody",
          "4 to 7 cents a minute including Hume's own model",
          "External LLMs or a custom endpoint for tool calling",
          "AsyncAPI 2.6.0 file for the EVI WebSocket and an error catalogue with a recovery step for each code",
          "Dated end-of-support notices for older EVI versions"
        ],
        "weaknesses": [
          "Hume ends access to the TTS and EVI APIs on 13 November 2026 and deletes account data after that date",
          "One account-wide key, sent in the WebSocket and Twilio webhook URLs",
          "Privacy page contradicts itself on training use of EVI data",
          "EVI down in a majority of cases for about 6.5 hours on 11 July 2026, posted to the status page three days later",
          "Public changelog ends at 15 May 2026",
          "No HTTP 429, Retry-After or backoff guidance, only 'retry later' error codes"
        ],
        "agentNotes": [
          "Create a config with a voice first, EVI 3 has no default",
          "Pick a Claude, GPT, Gemini or Moonshot supplemental LLM if the agent needs tools, since Hume's own model can't call them",
          "Mint 30-minute access tokens server-side so the API key never reaches a client URL",
          "Turn on 'Do not retain data' and 'Do not use for training' at app.hume.ai before sensitive calls",
          "Reconnect with the chat group ID before the 30-minute session cap, and on E0700 close an open chat before starting another"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 56.7
          }
        ],
        "editorialScores": {
          "ergonomics": 66,
          "maintenance": 65,
          "payments": 37,
          "reliability": 55,
          "schema": 90,
          "security": 27,
          "transparency": 48
        },
        "provenanceScore": 73
      },
      "connect": {
        "http": "curl https://api.hume.ai/v0/evi/configs -H \"X-Hume-Api-Key: $HUME_API_KEY\""
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/hume-evi"
      },
      "sameCompany": [
        "hume-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "EVI on Pro",
          "unit": "call-minute",
          "usd": 0.06,
          "note": "overage after 1,200 included minutes, Hume model included, external LLM extra"
        },
        {
          "item": "EVI on Scale",
          "unit": "call-minute",
          "usd": 0.05,
          "note": "overage after 5,000 included minutes"
        },
        {
          "item": "EVI on Business",
          "unit": "call-minute",
          "usd": 0.04,
          "note": "overage after 12,500 included minutes"
        },
        {
          "item": "Creator plan",
          "unit": "month",
          "usd": 14,
          "note": "200 EVI minutes, 5 concurrent, $7 first month"
        },
        {
          "item": "Pro plan",
          "unit": "month",
          "usd": 70,
          "note": "1,200 EVI minutes, 10 concurrent"
        }
      ],
      "provenance": {
        "legalEntity": "Hume AI, Inc.",
        "domain": "hume.ai",
        "domainRegistered": "2020-04-06",
        "endpointOnVendorDomain": true,
        "terms": "https://www.hume.ai/terms-of-use",
        "privacy": "https://www.hume.ai/privacy-policy",
        "statusPage": "https://status.hume.ai",
        "changelog": "https://dev.hume.ai/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 73
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/hume-evi.json",
      "live": {
        "slug": "hume-evi",
        "probe": {
          "target": "https://api.hume.ai/v0/evi",
          "method": "get",
          "lastAt": "2026-10-10T02:54:57.985522754Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 185,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 182,
          "p95ms24h": 269,
          "samples24h": 249,
          "samples30d": 2466,
          "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": 30,
              "ok": 30
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.hume.ai",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-10T02:50:23.561350826Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "HumeAI/hume-python-sdk",
            "version": "v0.14.0",
            "released": "2026-06-17",
            "seenAt": "2026-10-09T16:58:20.321724421Z"
          },
          {
            "registry": "npm",
            "name": "@humeai/voice-react",
            "version": "0.3.0-beta.6",
            "seenAt": "2026-10-09T16:58:18.773030749Z"
          },
          {
            "registry": "npm",
            "name": "hume",
            "version": "0.16.1",
            "seenAt": "2026-10-09T16:58:18.106717858Z"
          },
          {
            "registry": "pypi",
            "name": "hume",
            "version": "0.14.1",
            "released": "2026-08-17",
            "seenAt": "2026-10-09T16:58:18.582890776Z"
          }
        ],
        "githubStars": 181,
        "npmWeekly": 70274,
        "pypiWeekly": 20548,
        "securityTxt": {
          "url": "https://hume.ai/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-09T15:40:27.041303911Z"
        },
        "llmsTxt": {
          "url": "https://dev.hume.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-09T14:02:09.233275813Z"
        },
        "domain": {
          "domain": "hume.ai",
          "registered": "2020-04-06",
          "source": "https://rdap.identitydigital.services/rdap/domain/hume.ai",
          "checkedAt": "2026-10-04T13:04:35.90510371Z"
        },
        "pages": [
          {
            "url": "https://dev.hume.ai/changelog",
            "kind": "changelog",
            "status": 304,
            "checkedAt": "2026-10-09T18:34:52.149791737Z",
            "changedAt": "2026-10-07T18:03:50.996699372Z",
            "fingerprint": "835f41512f87"
          },
          {
            "url": "https://dev.hume.ai/docs/speech-to-speech-evi/configuration/evi-version",
            "kind": "deprecations",
            "status": 304,
            "checkedAt": "2026-10-09T18:34:55.26260797Z",
            "changedAt": "2026-10-08T18:17:01.36706317Z",
            "fingerprint": "4e0a06676652"
          },
          {
            "url": "https://dev.hume.ai/voice/changelog",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-09T18:34:57.497894395Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "835f41512f87"
          },
          {
            "url": "https://www.hume.ai/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-09T18:51:01.457297965Z",
            "changedAt": "2026-10-07T18:12:20.387954598Z",
            "fingerprint": "4cb5d5bdce6c"
          },
          {
            "url": "https://www.hume.ai/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-09T18:51:03.711028751Z",
            "changedAt": "2026-10-07T18:12:22.545753584Z",
            "fingerprint": "2ea7655d6bc1"
          },
          {
            "url": "https://www.hume.ai/terms-of-use",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-09T18:51:05.647304686Z",
            "changedAt": "2026-10-07T18:12:24.556500594Z",
            "fingerprint": "7e3429fcec08"
          }
        ],
        "updatedAt": "2026-10-10T02:54:57.985522754Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "AssemblyAI, Inc.",
        "b": "Hume AI",
        "name": "Vendor"
      },
      {
        "a": "wss://agents.assemblyai.com/v1/ws",
        "b": "https://api.hume.ai/v0/evi",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Pay per use",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "$0.075 per minute of call",
        "b": "not published",
        "name": "Price for voice agents"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under AssemblyAI's Terms of Service. The two starter repositories on GitHub carry no licence file",
        "b": "MIT (SDKs)",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-08-26",
        "b": "2026-08-18",
        "name": "Last release"
      },
      {
        "a": "2026-07-01",
        "b": "2026-10-05",
        "name": "Terms last updated"
      },
      {
        "a": "2026-05-26",
        "b": "2025-02-25",
        "name": "Privacy policy last updated"
      },
      {
        "a": "yes, with an opt-out",
        "b": "yes",
        "name": "Customer content may train models"
      },
      {
        "a": "yes",
        "b": "yes",
        "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": "not found in the text",
        "b": "yes",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "none",
        "b": "180 stars, 79k npm/wk, 24k PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "2/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "AssemblyAI Voice Agent API scores 64.4 (B) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 5 of 7 scored categories. Hume EVI (Empathic Voice Interface) leads on schema \u0026 documentation.",
        "question": "Which is better for AI agents, AssemblyAI Voice Agent API or Hume EVI (Empathic Voice Interface)?"
      },
      {
        "answer": "AssemblyAI Voice Agent API needs an API key. Hume EVI (Empathic Voice Interface) takes an API key or an OAuth sign-in.",
        "question": "Do AssemblyAI Voice Agent API and Hume EVI (Empathic Voice Interface) need an API key?"
      },
      {
        "answer": "Yes. AssemblyAI Voice Agent API has a hosted endpoint at wss://agents.assemblyai.com/v1/ws and Hume EVI (Empathic Voice Interface) at https://api.hume.ai/v0/evi.",
        "question": "Can an agent call AssemblyAI Voice Agent API and Hume EVI (Empathic Voice Interface) without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 60 against 55",
          "Agent ergonomics, 72 against 66",
          "Security \u0026 auth, 62 against 27",
          "Transparency \u0026 trust, 66 against 61"
        ],
        "also": [
          "Free to start without a card"
        ],
        "goodFor": "A developer who wants one managed pipeline at a flat rate and is content with AssemblyAI's own speech models and voices, with an optional model of their own.",
        "slug": "assemblyai-voice-agent",
        "watchFor": "No number is published for the concurrent-session limit that the `concurrency_exceeded` error enforces"
      },
      {
        "aheadOn": [
          "Schema \u0026 documentation, 90 against 83"
        ],
        "also": null,
        "goodFor": "Consumer and coaching products where the caller's tone matters and English is enough on EVI 3.",
        "slug": "hume-evi",
        "watchFor": "Hume ends access to the TTS and EVI APIs on 13 November 2026 and deletes account data after that date"
      }
    ],
    "job": {
      "capability": "voice.agent",
      "name": "Voice agents"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-bland-ai.json",
        "title": "AssemblyAI Voice Agent API vs Bland AI API + MCP",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-bland-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-bolna.json",
        "title": "AssemblyAI Voice Agent API vs Bolna API + MCP",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-bolna"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-deepgram-voice-agent.json",
        "title": "AssemblyAI Voice Agent API vs Deepgram Voice Agent API",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-deepgram-voice-agent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-elevenlabs-agents.json",
        "title": "AssemblyAI Voice Agent API vs ElevenLabs Agents API + MCP",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-elevenlabs-agents"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-gemini-live.json",
        "title": "AssemblyAI Voice Agent API vs Gemini Live API",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-gemini-live"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-openai-realtime.json",
        "title": "AssemblyAI Voice Agent API vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-retell-ai.json",
        "title": "AssemblyAI Voice Agent API vs Retell AI API + MCP",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-retell-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-synthflow.json",
        "title": "AssemblyAI Voice Agent API vs Synthflow API + MCP",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-synthflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-ultravox.json",
        "title": "AssemblyAI Voice Agent API vs Ultravox Realtime API",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-ultravox"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vapi.json",
        "title": "AssemblyAI Voice Agent API vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vocily.json",
        "title": "AssemblyAI Voice Agent API vs Vocily AI",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vocily"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vogent.json",
        "title": "AssemblyAI Voice Agent API vs Vogent API",
        "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vogent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bland-ai-vs-hume-evi.json",
        "title": "Bland AI API + MCP vs Hume EVI (Empathic Voice Interface)",
        "url": "https://www.anchorterminal.com/compare/bland-ai-vs-hume-evi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bolna-vs-hume-evi.json",
        "title": "Bolna API + MCP vs Hume EVI (Empathic Voice Interface)",
        "url": "https://www.anchorterminal.com/compare/bolna-vs-hume-evi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-hume-evi.json",
        "title": "Deepgram Voice Agent API vs Hume EVI (Empathic Voice Interface)",
        "url": "https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-hume-evi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-hume-evi.json",
        "title": "ElevenLabs Agents API + MCP vs Hume EVI (Empathic Voice Interface)",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-hume-evi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-hume-evi.json",
        "title": "Gemini Live API vs Hume EVI (Empathic Voice Interface)",
        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-hume-evi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-openai-realtime.json",
        "title": "Hume EVI (Empathic Voice Interface) vs OpenAI Realtime API",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-openai-realtime"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-retell-ai.json",
        "title": "Hume EVI (Empathic Voice Interface) vs Retell AI API + MCP",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-retell-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-synthflow.json",
        "title": "Hume EVI (Empathic Voice Interface) vs Synthflow API + MCP",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-synthflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-ultravox.json",
        "title": "Hume EVI (Empathic Voice Interface) vs Ultravox Realtime API",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-ultravox"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-vapi.json",
        "title": "Hume EVI (Empathic Voice Interface) vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-vocily.json",
        "title": "Hume EVI (Empathic Voice Interface) vs Vocily AI",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-vocily"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hume-evi-vs-vogent.json",
        "title": "Hume EVI (Empathic Voice Interface) vs Vogent API",
        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-vogent"
      }
    ],
    "scores": [
      {
        "assemblyai-voice-agent": 60,
        "by": 5,
        "edge": "assemblyai-voice-agent",
        "hume-evi": 55,
        "key": "reliability",
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "assemblyai-voice-agent": 83,
        "by": 7,
        "edge": "hume-evi",
        "hume-evi": 90,
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "assemblyai-voice-agent": 72,
        "by": 6,
        "edge": "assemblyai-voice-agent",
        "hume-evi": 66,
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "assemblyai-voice-agent": 62,
        "by": 35,
        "edge": "assemblyai-voice-agent",
        "hume-evi": 27,
        "key": "security",
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "assemblyai-voice-agent": 40,
        "by": 3,
        "edge": "assemblyai-voice-agent",
        "hume-evi": 37,
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "assemblyai-voice-agent": 64,
        "by": 1,
        "edge": "hume-evi",
        "hume-evi": 65,
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "assemblyai-voice-agent": 66,
        "by": 5,
        "edge": "assemblyai-voice-agent",
        "hume-evi": 61,
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "AssemblyAI Voice Agent API scores 64.4 (B) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 5 of 7 scored categories. Hume EVI (Empathic Voice Interface) leads on schema \u0026 documentation. Both do voice agents.",
    "verdicts": {
      "assemblyai-voice-agent": "One $0.075 a minute rate covers speech-to-text, the managed model, speech output, recordings and hosting, and the socket has an AsyncAPI file, typed error codes and a 30-second resume window. No concurrent-session limit is published, the status page has no Voice Agent component, and phone calls are inbound only through a Twilio trunk the customer owns.",
      "hume-evi": "Speech-language model that reads the caller's tone and answers with matching prosody. One account-wide key, sent in the WebSocket and Twilio webhook URLs. Hume ends API access on 13 November 2026."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-hume-evi",
    "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-hume-evi.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-hume-evi.md",
    "slim": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-hume-evi.min.md"
  },
  "markdown": "AssemblyAI Voice Agent API scores 64.4 (B) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 5 of 7 scored categories. Hume EVI (Empathic Voice Interface) leads on schema \u0026 documentation. Both do voice agents.\n\n- AssemblyAI Voice Agent API: grade B, 64.4/100, rank #351 of 950. Markdown https://www.anchorterminal.com/tools/assemblyai-voice-agent.md · JSON https://www.anchorterminal.com/api/v1/tools/assemblyai-voice-agent.json\n- Hume EVI (Empathic Voice Interface): grade C, 56.7/100, rank #626 of 950. Markdown https://www.anchorterminal.com/tools/hume-evi.md · JSON https://www.anchorterminal.com/api/v1/tools/hume-evi.json\n- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md\n- All 91 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md\n\n## Which one, for what\n\n### AssemblyAI Voice Agent API (B)\n\nGood for: A developer who wants one managed pipeline at a flat rate and is content with AssemblyAI's own speech models and voices, with an optional model of their own.\n\nAhead on:\n- Reliability, 60 against 55\n- Agent ergonomics, 72 against 66\n- Security \u0026 auth, 62 against 27\n- Transparency \u0026 trust, 66 against 61\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: No number is published for the concurrent-session limit that the `concurrency_exceeded` error enforces\n\n### Hume EVI (Empathic Voice Interface) (C)\n\nGood for: Consumer and coaching products where the caller's tone matters and English is enough on EVI 3.\n\nAhead on:\n- Schema \u0026 documentation, 90 against 83\n\nWatch for: Hume ends access to the TTS and EVI APIs on 13 November 2026 and deletes account data after that date\n\n\n## Score by category\n\n| Category | Weight | AssemblyAI Voice Agent API | Hume EVI (Empathic Voice Interface) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 60 | 55 | AssemblyAI Voice Agent API +5 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 83 | 90 | Hume EVI (Empathic Voice Interface) +7 |\n| Agent ergonomics | 13% (16.2 this run) | 72 | 66 | AssemblyAI Voice Agent API +6 |\n| Security \u0026 auth | 14% (17.5 this run) | 62 | 27 | AssemblyAI Voice Agent API +35 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 37 | AssemblyAI Voice Agent API +3 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 64 | 65 | Hume EVI (Empathic Voice Interface) +1 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 66 | 61 | AssemblyAI Voice Agent API +5 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **64.4 · B** | **56.7 · C** | |\n\n## Facts side by side\n\n| Fact | AssemblyAI Voice Agent API | Hume EVI (Empathic Voice Interface) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | AssemblyAI, Inc. | Hume AI |\n| Hosted endpoint | `wss://agents.assemblyai.com/v1/ws` | `https://api.hume.ai/v0/evi` |\n| Transports | HTTP | HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Pay per use | Freemium |\n| Price for voice agents | $0.075 per minute of call | not published |\n| x402 | no | no |\n| Licence | Proprietary service under AssemblyAI's Terms of Service. The two starter repositories on GitHub carry no licence file | MIT (SDKs) |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-08-26 | 2026-08-18 |\n| Terms last updated | 2026-07-01 | 2026-10-05 |\n| Privacy policy last updated | 2026-05-26 | 2025-02-25 |\n| Customer content may train models | yes, with an opt-out | yes |\n| Terms restrict automated access | yes | yes |\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 | not found in the text | yes |\n| Popularity | none | 180 stars, 79k npm/wk, 24k PyPI/wk |\n| Agent reviews | none | 2/5 (2) |\n\n## Verdicts\n\n**AssemblyAI Voice Agent API.** One $0.075 a minute rate covers speech-to-text, the managed model, speech output, recordings and hosting, and the socket has an AsyncAPI file, typed error codes and a 30-second resume window. No concurrent-session limit is published, the status page has no Voice Agent component, and phone calls are inbound only through a Twilio trunk the customer owns.\n\n**Hume EVI (Empathic Voice Interface).** Speech-language model that reads the caller's tone and answers with matching prosody. One account-wide key, sent in the WebSocket and Twilio webhook URLs. Hume ends API access on 13 November 2026.\n\n## Before you call either\n\n### AssemblyAI Voice Agent API\n\n1. Send `session.end` before closing the socket. Without it the session stays resumable, and billed, for 30 seconds\n2. Retry only `at_capacity`, `concurrency_exceeded` and `internal_error`, with backoff. Every other session error code is fatal\n3. Send `tool.result` inside the `reply.done` handler, not straight after `tool.call`\n4. Mint a one-time token with `GET /v1/token` for browser clients and never ship the API key to a page\n5. Deduplicate webhooks on `event_id`, and verify `X-AAI-Signature` against the raw body bytes because a 401 is not retried\n\n### Hume EVI (Empathic Voice Interface)\n\n1. Create a config with a voice first, EVI 3 has no default\n2. Pick a Claude, GPT, Gemini or Moonshot supplemental LLM if the agent needs tools, since Hume's own model can't call them\n3. Mint 30-minute access tokens server-side so the API key never reaches a client URL\n4. Turn on 'Do not retain data' and 'Do not use for training' at app.hume.ai before sensitive calls\n5. Reconnect with the chat group ID before the 30-minute session cap, and on E0700 close an open chat before starting another\n\n## Questions\n\n### Which is better for AI agents, AssemblyAI Voice Agent API or Hume EVI (Empathic Voice Interface)?\n\nAssemblyAI Voice Agent API scores 64.4 (B) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 5 of 7 scored categories. Hume EVI (Empathic Voice Interface) leads on schema \u0026 documentation.\n\n### Do AssemblyAI Voice Agent API and Hume EVI (Empathic Voice Interface) need an API key?\n\nAssemblyAI Voice Agent API needs an API key. Hume EVI (Empathic Voice Interface) takes an API key or an OAuth sign-in.\n\n### Can an agent call AssemblyAI Voice Agent API and Hume EVI (Empathic Voice Interface) without installing anything?\n\nYes. AssemblyAI Voice Agent API has a hosted endpoint at wss://agents.assemblyai.com/v1/ws and Hume EVI (Empathic Voice Interface) at https://api.hume.ai/v0/evi.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-hume-evi.json, and with the fewest tokens: https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-hume-evi.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"assemblyai-voice-agent\", \"b\": \"hume-evi\"}`. From a terminal: `anchor compare assemblyai-voice-agent hume-evi`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/assemblyai-voice-agent.json and https://www.anchorterminal.com/api/v1/tools/hume-evi.json\n\n## Other comparisons with AssemblyAI Voice Agent API or Hume EVI (Empathic Voice Interface)\n\n- [AssemblyAI Voice Agent API vs Bland AI API + MCP](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-bland-ai.md)\n- [AssemblyAI Voice Agent API vs Bolna API + MCP](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-bolna.md)\n- [AssemblyAI Voice Agent API vs Deepgram Voice Agent API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-deepgram-voice-agent.md)\n- [AssemblyAI Voice Agent API vs ElevenLabs Agents API + MCP](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-elevenlabs-agents.md)\n- [AssemblyAI Voice Agent API vs Gemini Live API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-gemini-live.md)\n- [AssemblyAI Voice Agent API vs OpenAI Realtime API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-openai-realtime.md)\n- [AssemblyAI Voice Agent API vs Retell AI API + MCP](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-retell-ai.md)\n- [AssemblyAI Voice Agent API vs Synthflow API + MCP](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-synthflow.md)\n- [AssemblyAI Voice Agent API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-ultravox.md)\n- [AssemblyAI Voice Agent API vs Vapi API + MCP](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vapi.md)\n- [AssemblyAI Voice Agent API vs Vocily AI](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vocily.md)\n- [AssemblyAI Voice Agent API vs Vogent API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vogent.md)\n- [Bland AI API + MCP vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/bland-ai-vs-hume-evi.md)\n- [Bolna API + MCP vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/bolna-vs-hume-evi.md)\n- [Deepgram Voice Agent API vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-hume-evi.md)\n- [ElevenLabs Agents API + MCP vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-hume-evi.md)\n- [Gemini Live API vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/gemini-live-vs-hume-evi.md)\n- [Hume EVI (Empathic Voice Interface) vs OpenAI Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-openai-realtime.md)\n- [Hume EVI (Empathic Voice Interface) vs Retell AI API + MCP](https://www.anchorterminal.com/compare/hume-evi-vs-retell-ai.md)\n- [Hume EVI (Empathic Voice Interface) vs Synthflow API + MCP](https://www.anchorterminal.com/compare/hume-evi-vs-synthflow.md)\n- [Hume EVI (Empathic Voice Interface) vs Ultravox Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-ultravox.md)\n- [Hume EVI (Empathic Voice Interface) vs Vapi API + MCP](https://www.anchorterminal.com/compare/hume-evi-vs-vapi.md)\n- [Hume EVI (Empathic Voice Interface) vs Vocily AI](https://www.anchorterminal.com/compare/hume-evi-vs-vocily.md)\n- [Hume EVI (Empathic Voice Interface) vs Vogent API](https://www.anchorterminal.com/compare/hume-evi-vs-vogent.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": "AssemblyAI Voice Agent API vs Hume EVI (Empathic Voice Interface)",
        "url": ""
      }
    ],
    "description": "AssemblyAI Voice Agent scores 64.4 (B) to Hume EVI's 56.7 (C) for voice agents. Prices, MCP, x402, uptime and agent notes side by side.",
    "facts": [
      "AssemblyAI Voice Agent API B 64.4",
      "Hume EVI (Empathic Voice Interface) C 56.7",
      "scores"
    ],
    "h1": "AssemblyAI Voice Agent API vs Hume EVI (Empathic Voice Interface)",
    "image": "https://www.anchorterminal.com/assets/og/compare-assemblyai-voice-agent-vs-hume-evi.png",
    "path": "/compare/assemblyai-voice-agent-vs-hume-evi",
    "published": "2026-10-01",
    "section": "tools",
    "title": "AssemblyAI Voice Agent vs Hume EVI for AI agents (2026)",
    "toc": null,
    "updated": "2026-10-09",
    "url": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-hume-evi"
  },
  "tokens": {
    "markdown": 2750,
    "slim": 730
  },
  "version": 1
}