{
  "data": {
    "a": {
      "slug": "pipecat",
      "name": "Pipecat",
      "vendor": "Daily",
      "vendorUrl": "https://www.pipecat.ai/",
      "kind": "framework",
      "category": "voice-agents",
      "summary": "Pipecat is Daily's open-source Python framework for real-time voice and multimodal agents, built as pipelines of transport, speech-to-text, LLM and text-to-speech services, with client SDKs and optional hosting on Pipecat Cloud.",
      "url": "https://www.anchorterminal.com/tools/pipecat",
      "markdownUrl": "https://www.anchorterminal.com/tools/pipecat.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/pipecat.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/pipecat.json",
      "repo": "https://github.com/pipecat-ai/pipecat",
      "license": "BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service",
      "transports": [],
      "packages": [
        {
          "registry": "pypi",
          "name": "pipecat-ai"
        },
        {
          "registry": "npm",
          "name": "@pipecat-ai/client-js"
        }
      ],
      "auth": "none",
      "authNotes": "The framework has no account or key of its own and runs in the developer's process. Each service takes its provider's key, such as `DEEPGRAM_API_KEY` or `CARTESIA_API_KEY`, passed in code. Pipecat Cloud uses public and private API keys as bearer tokens, CLI login and email with a one-time code for the dashboard.",
      "pricing": "free",
      "pricingNotes": "Free under BSD-2-Clause, with no signup. The developer pays each model, speech and transport provider. Pipecat Cloud, if used, bills from $0.01 per active agent minute for agent-1x, with Daily PSTN at $0.018 a minute and 1:1 Daily WebRTC voice free (https://www.daily.co/pricing/pipecat-cloud/, read 17 October 2026).",
      "priceSummary": "Free · OSS",
      "where": "library",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the framework source, the docs or the Pipecat Cloud pricing page (checked 17 October 2026).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 16314,
        "npmWeekly": 97617,
        "pypiWeekly": 302047,
        "asOf": "2026-10-17"
      },
      "docsUrl": "https://docs.pipecat.ai",
      "llmsTxt": "https://docs.pipecat.ai/llms.txt",
      "capabilities": [
        "voice.agent",
        "voice.pipeline",
        "voice.speech-to-speech",
        "voice.tools",
        "voice.telephony",
        "agent.mcp-client",
        "agent.multi-agent"
      ],
      "tags": [
        "framework",
        "open-source",
        "self-hosted",
        "python",
        "free",
        "no-card",
        "bsd-2-clause",
        "llms-txt",
        "mcp-client",
        "pipeline",
        "speech-to-speech",
        "telephony",
        "webrtc",
        "no-telemetry"
      ],
      "lastRelease": "2026-09-26",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 68.9,
        "grade": "B",
        "agentReady": false,
        "rank": 215,
        "ranked": true,
        "rankOf": 1133,
        "categoryRank": 4,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 72,
          "maintenance": 87,
          "payments": 60,
          "reliability": 72,
          "schema": 90,
          "security": 57,
          "transparency": 81
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-17"
        },
        "negative": -4,
        "negativeNotes": [
          "2025-11-10 to 2026-06-17. Three published advisories, fixed and between four and eleven months old, so 1 point each. Remote code execution through `pickle.loads()` in the optional, deprecated LivekitFrameSerializer (GHSA-c2jg-5cp7-6wc7, CVE-2025-62373, critical, fixed in 0.0.94 on 10 November 2025, advisory published 23 April 2026), arbitrary file read through the development runner's `/files` endpoint (GHSA-3363-2ph6-35wh, high, fixed in 1.2.0 on 14 May 2026) and unauthenticated call control through the runner's telephony `/ws` endpoint (GHSA-j8cv-x86q-rj85, high, fixed in 1.4.0 on 17 June 2026). The moderate GHSA-hqm2-cfx2-2vgh of 15 October 2026 covers behaviour documented as by design and isn't deducted. https://osv.dev/vulnerability/GHSA-c2jg-5cp7-6wc7, https://osv.dev/vulnerability/GHSA-3363-2ph6-35wh, https://osv.dev/vulnerability/GHSA-j8cv-x86q-rj85",
          "2026-10-16. changelog/6193.security.md says the services for OpenAI-compatible providers other than OpenAI sent `OPENAI_API_KEY` to their provider when given no `api_key`, including when `os.getenv` read an unset variable. Fixed on main on 16 October 2026 (commit 89d0e031a) and not in a release at the check, with no advisory, so 1 point. https://github.com/pipecat-ai/pipecat/blob/main/changelog/6193.security.md"
        ],
        "verdict": "A BSD-2-Clause Python framework with dozens of speech, model and transport integrations, an MCP client that filters tools and pins arguments, and eight releases in 90 days. It has no tool-approval step, and 1.12.0 can send OPENAI_API_KEY to other OpenAI-compatible providers when no key is passed, a flaw fixed on main but not yet released.",
        "bestFor": "Python teams that want to own a voice agent's pipeline, pick each speech and model provider, and host it themselves or on Pipecat Cloud.",
        "strengths": [
          "BSD-2-Clause framework, with 23 speech-to-text, 25 LLM, 31 text-to-speech and 6 speech-to-speech services listed in the README",
          "Eight PyPI releases in the 90 days to 17 October 2026, with a dated Keep a Changelog file and pull-request links",
          "`MCPClient` takes a tool allowlist, per-tool output filters and fixed arguments hidden from the model",
          "No telemetry found in the source. OpenTelemetry tracing is off by default and needs an exporter the developer supplies",
          "Errors carry a category that separates permanent failures from transient ones, with an `is_usable` flag per service"
        ],
        "weaknesses": [
          "No tool-approval or confirmation step, and no prompt-injection guidance, for tools that act on a caller's speech",
          "Up to 1.12.0, OpenAI-compatible provider services fall back to `OPENAI_API_KEY` when given no key. Fixed on main on 16 October, unreleased",
          "Three high or critical advisories fixed since November 2025, in an optional serialiser and the development runner",
          "Breaking changes ship in minor releases, 16 flagged in 1.8.0 and 4 in 1.10.0, although the changelog says it follows semver",
          "The OpenTelemetry reference page gives `enable_tracing` a default of True, while the 1.12.0 source defaults it to False"
        ],
        "agentNotes": [
          "Pass `api_key` explicitly to every OpenAI-compatible service such as Groq, Cerebras or OpenRouter. On 1.12.0 a missing key sends `OPENAI_API_KEY` to that provider",
          "Pass `tools_filter` to `MCPClient` so only the tools the call needs reach the model, and use `tools_arguments` for values the model must not choose",
          "Gate tools that book, pay or send in your own handler. Pipecat has no approval step, and a caller's speech goes straight to the model",
          "Keep the development runner on localhost. Its `/start`, `/daily` and dial-in webhook endpoints take requests from anyone by design",
          "Pin a minor version and read the breaking-change flags in CHANGELOG.md before upgrading, since minor releases remove and rename APIs"
        ],
        "metrics": {
          "kind": "library",
          "measured": false
        },
        "reviewCount": 4,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 68.9
          }
        ],
        "editorialScores": {
          "ergonomics": 72,
          "maintenance": 87,
          "payments": 60,
          "reliability": 72,
          "schema": 90,
          "security": 57,
          "transparency": 83
        },
        "provenanceScore": 79
      },
      "connect": {
        "install": "pip install pipecat-ai   # or: uv tool install \"pipecat-ai[cli]\" \u0026\u0026 pipecat init"
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/pipecat"
      },
      "sameCompany": [
        "pipecat-phonellm"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Pipecat Cloud agent-1x (0.5 vCPU, 1 GB)",
          "unit": "call-minute",
          "usd": 0.01,
          "note": "per active agent minute, reserved agents $0.0005 a minute"
        },
        {
          "item": "Pipecat Cloud agent-2x (1 vCPU, 2 GB)",
          "unit": "call-minute",
          "usd": 0.02,
          "note": "per active agent minute, reserved agents $0.001 a minute"
        },
        {
          "item": "Pipecat Cloud agent-3x (1.5 vCPU, 3 GB)",
          "unit": "call-minute",
          "usd": 0.03,
          "note": "per active agent minute, reserved agents $0.0015 a minute"
        },
        {
          "item": "Daily WebRTC voice and video",
          "unit": "call-minute",
          "usd": 0.004,
          "note": "per participant minute, 1:1 voice sessions on Pipecat Cloud free"
        },
        {
          "item": "Daily PSTN dial-in or dial-out",
          "unit": "call-minute",
          "usd": 0.018,
          "note": "SIP included, SIP alone $0.003 to $0.02 a minute"
        },
        {
          "item": "SIP REFER call transfer",
          "unit": "tx",
          "usd": 0.2,
          "note": "per transfer event"
        },
        {
          "item": "Audio recording",
          "unit": "audio-minute",
          "usd": 0.005,
          "note": "storage $0.003 a minute"
        }
      ],
      "provenance": {
        "legalEntity": "Daily",
        "domain": "pipecat.ai",
        "domainRegistered": "2024-05-01",
        "endpointOnVendorDomain": null,
        "terms": "https://www.daily.co/legal/terms-of-service/",
        "privacy": "https://www.daily.co/legal/privacy/",
        "statusPage": "https://status.pipecat.daily.co",
        "changelog": "https://github.com/pipecat-ai/pipecat/blob/main/CHANGELOG.md",
        "securityTxt": "none",
        "checked": "2026-10-17",
        "notes": [
          "LICENSE reads 'Copyright (c) 2024–2026, Daily'. The terms of service (last updated 31 March 2025) say Daily and name Pipecat Cloud and Daily's open-source frameworks among its services. The DPA (last updated 1 May 2025) names the company 'Daily, Co.' at 548 Market St., San Francisco.",
          "RDAP gives pipecat.ai a registration date of 1 May 2024. The docs are at docs.pipecat.ai and the code under GitHub's pipecat-ai organisation.",
          "security.txt returns 404 on www.pipecat.ai, docs.pipecat.ai and www.daily.co. SECURITY.md and the Pipecat Cloud security guide route reports to an email address at Daily, which the guide says is acknowledged within a week. Daily publishes a responsible disclosure policy with no bounty.",
          "The privacy policy is effective 6 January 2025. The sub-processor list is dated 1 September 2026.",
          "The status page covers Pipecat Cloud, not the framework.",
          "WebFetch refused docs.pipecat.ai and github.com, so docs.pipecat.ai, www.daily.co, status.pipecat.daily.co, developers.cloudflare.com, huggingface.co, pypi.org, api.osv.dev, pypistats.org, repos.ecosyste.ms, issues.ecosyste.ms, the npm registry, the MCP registry and rdap.org were read with curl after their robots.txt. GitHub's own pages answered 403 through the session's proxy."
        ],
        "score": 79
      },
      "requirements": {
        "card": "unknown",
        "freeTier": true,
        "minutes": 20,
        "credential": "api-key",
        "hosting": [
          "self-hosted"
        ],
        "euResidency": "unknown",
        "trainsOnData": "no",
        "zeroRetention": "unknown",
        "dpa": true,
        "selfHost": "yes"
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/pipecat.json",
      "live": {
        "slug": "pipecat",
        "vendorStatus": {
          "page": "https://status.pipecat.daily.co",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-18T00:09:01.837321585Z"
        },
        "pages": [
          {
            "url": "https://raw.githubusercontent.com/pipecat-ai/pipecat/main/CHANGELOG.md",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-17T23:10:46.812428744Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "0fb6d8e3d8a2"
          },
          {
            "url": "https://www.daily.co/pricing/pipecat-cloud/",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-17T23:14:57.395170578Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "06f32f71f3dd"
          }
        ],
        "updatedAt": "2026-10-18T00:09:01.837321585Z"
      }
    },
    "answer": "Pipecat scores 68.9 (B) on agent readiness against Ultravox Realtime API's 58.5 (C), and leads in every scored category.",
    "b": {
      "slug": "ultravox",
      "name": "Ultravox Realtime API",
      "vendor": "Ultravox (Fixie.ai)",
      "vendorUrl": "https://www.ultravox.ai",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "Hosted voice agents on Ultravox, an open-weight model that takes speech directly with no speech-to-text step and answers through a TTS voice.",
      "url": "https://www.anchorterminal.com/tools/ultravox",
      "markdownUrl": "https://www.anchorterminal.com/tools/ultravox.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/ultravox.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/ultravox.json",
      "repo": "https://github.com/fixie-ai/ultravox",
      "license": "MIT (model code)",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.ultravox.ai/api",
      "packages": [
        {
          "registry": "npm",
          "name": "ultravox-client"
        },
        {
          "registry": "pypi",
          "name": "ultravox-client"
        }
      ],
      "auth": "api-key",
      "authNotes": "`X-API-Key` header on the REST API. Clients join a call with the `joinUrl` returned when it's created, so the key stays on your server.",
      "pricing": "usage",
      "pricingNotes": "Pay as you go at $0.05 a minute after 30 free minutes, capped at 5 concurrent calls. Pro is $100 a month (annual rate) at the same $0.05 a minute with no hard concurrency cap, the outbound scheduler, 5 custom voices and 20 RAG corpora. SIP costs 0.5 cents a minute (0.48 on Pro). Threads are $2 per 1M input tokens and $15 per 1M output. Enterprise is custom. Telephony from Twilio or other carriers is billed by them (https://www.ultravox.ai/pricing).",
      "priceSummary": "$100 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in the docs, pricing page or MCP docs (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 4574,
        "npmWeekly": 17262,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.ultravox.ai",
      "llmsTxt": "https://docs.ultravox.ai/llms.txt",
      "openapi": "https://api.ultravox.ai/api/schema/",
      "capabilities": [
        "voice.agent",
        "voice.speech-to-speech",
        "voice.tools",
        "voice.telephony"
      ],
      "tags": [
        "hosted",
        "open-weights",
        "no-card",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "streaming",
        "speech-to-speech"
      ],
      "lastRelease": "2026-07-18",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 58.5,
        "grade": "C",
        "agentReady": false,
        "rank": 633,
        "ranked": true,
        "rankOf": 1133,
        "categoryRank": 13,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 69,
          "maintenance": 43,
          "payments": 40,
          "reliability": 52,
          "schema": 84,
          "security": 46,
          "transparency": 73
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Flat $0.05 a minute including model and built-in voices. No MCP server.",
        "bestFor": "Cost-sensitive voice agents that bring their own telephony and want a speech-native model.",
        "strengths": [
          "Flat $0.05 a minute including model and built-in voices",
          "Speech-native model with no separate STT stage, v0.7 weights public under MIT",
          "429 and 503 responses with Retry-After and backoff guidance",
          "Deprecation guide with a minimum 30-day window",
          "Privacy policy says voice data isn't used for training"
        ],
        "weaknesses": [
          "No MCP server",
          "News page, deprecation guide and Python client last updated in December 2025",
          "Plain API keys with no scopes",
          "Pay as you go caps at 5 concurrent calls",
          "No subprocessor list or stated certification"
        ],
        "agentNotes": [
          "Honour `Retry-After` on 429 and 503 when creating calls",
          "Pin the model string (`ultravox-v0.7` or `ultravox-v0.6`) rather than relying on the default",
          "Hand clients the `joinUrl`, never the API key",
          "Delete calls through the API when you need data removed, there's no retention setting",
          "Use call stages for multi-step flows instead of one long prompt"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 58.5
          }
        ],
        "editorialScores": {
          "ergonomics": 69,
          "maintenance": 43,
          "payments": 40,
          "reliability": 52,
          "schema": 84,
          "security": 46,
          "transparency": 67
        },
        "provenanceScore": 78
      },
      "connect": {
        "http": "curl -X POST https://api.ultravox.ai/api/calls -H \"X-API-Key: $ULTRAVOX_API_KEY\" \\\n  -H \"content-type: application/json\" \\\n  -d '{\"systemPrompt\":\"You are a friendly receptionist.\",\"voice\":\"Mark\"}'"
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/ultravox"
      },
      "sameCompany": [
        "ultravox-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Ultravox Realtime",
          "unit": "call-minute",
          "usd": 0.05,
          "note": "model and built-in voices, telephony carrier costs extra"
        },
        {
          "item": "SIP",
          "unit": "call-minute",
          "usd": 0.005,
          "note": "0.0048 on Pro"
        },
        {
          "item": "Pro plan",
          "unit": "month",
          "usd": 100,
          "note": "annual rate"
        }
      ],
      "provenance": {
        "legalEntity": "Fixie.ai Inc.",
        "domain": "ultravox.ai",
        "domainRegistered": "2023-10-05",
        "endpointOnVendorDomain": true,
        "terms": "https://www.ultravox.ai/terms",
        "privacy": "https://www.ultravox.ai/privacy",
        "statusPage": "https://status.ultravox.ai",
        "changelog": "https://docs.ultravox.ai/changelog/news",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 78
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/ultravox.json",
      "live": {
        "slug": "ultravox",
        "probe": {
          "target": "https://api.ultravox.ai/api",
          "method": "get",
          "lastAt": "2026-10-18T00:15:00.222983827Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 130,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 133,
          "p95ms24h": 185,
          "samples24h": 253,
          "samples30d": 4435,
          "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": 247,
              "ok": 247
            },
            {
              "date": "2026-10-11",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-12",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-13",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-14",
              "probes": 249,
              "ok": 249
            },
            {
              "date": "2026-10-15",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-16",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-17",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-18",
              "probes": 3,
              "ok": 3
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.ultravox.ai",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-17T22:51:59.262477241Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "fixie-ai/ultravox",
            "version": "v0.6",
            "released": "2025-08-18",
            "seenAt": "2026-10-17T02:24:08.073518754Z"
          },
          {
            "registry": "npm",
            "name": "ultravox-client",
            "version": "0.6.0",
            "seenAt": "2026-10-17T02:24:06.164423832Z"
          },
          {
            "registry": "pypi",
            "name": "ultravox-client",
            "version": "0.1.0",
            "released": "2025-12-10",
            "seenAt": "2026-10-17T02:24:06.531600669Z"
          }
        ],
        "githubStars": 4580,
        "npmWeekly": 14435,
        "pypiWeekly": 140,
        "securityTxt": {
          "url": "https://ultravox.ai/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-17T15:52:17.759152164Z"
        },
        "llmsTxt": {
          "url": "https://docs.ultravox.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-17T14:23:27.744884243Z"
        },
        "domain": {
          "domain": "ultravox.ai",
          "registered": "2023-10-05",
          "source": "https://rdap.identitydigital.services/rdap/domain/ultravox.ai",
          "checkedAt": "2026-10-11T13:20:13.671560254Z"
        },
        "updatedAt": "2026-10-18T00:15:00.222983827Z"
      }
    },
    "facts": [
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        "a": "Agent framework",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Daily",
        "b": "Ultravox (Fixie.ai)",
        "name": "Vendor"
      },
      {
        "a": "no (local only)",
        "b": "https://api.ultravox.ai/api",
        "name": "Hosted endpoint"
      },
      {
        "a": "",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "None",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Free",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "$0.01 per minute of call",
        "b": "not published",
        "name": "Price for voice agents"
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      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service",
        "b": "MIT (model code)",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
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      {
        "a": "2026-09-26",
        "b": "2026-07-18",
        "name": "Last release"
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      {
        "a": "",
        "b": "2026-10-01",
        "name": "Terms last updated"
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      {
        "a": "",
        "b": "2026-10-01",
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        "a": "",
        "b": "yes",
        "name": "Customer content may train models"
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        "a": "",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
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      {
        "a": "16k stars, 98k npm/wk, 302k PyPI/wk",
        "b": "4.6k stars, 17k npm/wk",
        "name": "Popularity"
      },
      {
        "a": "3/5 (4)",
        "b": "3/5 (2)",
        "name": "Agent reviews"
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    ],
    "faq": [
      {
        "answer": "Pipecat scores 68.9 (B) on agent readiness against Ultravox Realtime API's 58.5 (C), and leads in every scored category.",
        "question": "Which is better for AI agents, Pipecat or Ultravox Realtime API?"
      },
      {
        "answer": "No hosted endpoint is listed for Pipecat. Ultravox Realtime API has a hosted endpoint at https://api.ultravox.ai/api.",
        "question": "Can an agent call Pipecat and Ultravox Realtime API without installing anything?"
      },
      {
        "answer": "Pipecat is open source (BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service). No open-source release is listed for Ultravox Realtime API.",
        "question": "Are Pipecat and Ultravox Realtime API open source?"
      }
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      {
        "aheadOn": [
          "Reliability, 72 against 52",
          "Schema \u0026 documentation, 90 against 84",
          "Security \u0026 auth, 57 against 46",
          "Payments \u0026 pricing, 60 against 40",
          "Maintenance \u0026 community, 87 against 43",
          "Transparency \u0026 trust, 81 against 73"
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          "Open source"
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        "goodFor": "Python teams that want to own a voice agent's pipeline, pick each speech and model provider, and host it themselves or on Pipecat Cloud.",
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        "watchFor": "No tool-approval or confirmation step, and no prompt-injection guidance, for tools that act on a caller's speech"
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          "A hosted endpoint, with nothing to install",
          "No incidents deducted, where Pipecat loses 4 points for them"
        ],
        "goodFor": "Cost-sensitive voice agents that bring their own telephony and want a speech-native model.",
        "slug": "ultravox",
        "watchFor": "No MCP server"
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      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-ultravox.json",
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      {
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        "url": "https://www.anchorterminal.com/compare/elevenlabs-agents-vs-ultravox"
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        "json": "https://www.anchorterminal.com/compare/gemini-live-vs-pipecat.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-live-vs-ultravox"
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        "url": "https://www.anchorterminal.com/compare/hume-evi-vs-ultravox"
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        "url": "https://www.anchorterminal.com/compare/livekit-agents-vs-pipecat"
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        "json": "https://www.anchorterminal.com/compare/livekit-agents-vs-ultravox.json",
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        "url": "https://www.anchorterminal.com/compare/livekit-agents-vs-ultravox"
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        "url": "https://www.anchorterminal.com/compare/openai-realtime-vs-ultravox"
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        "json": "https://www.anchorterminal.com/compare/pipecat-vs-placecall.json",
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        "url": "https://www.anchorterminal.com/compare/pipecat-vs-placecall"
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        "json": "https://www.anchorterminal.com/compare/pipecat-vs-retell-ai.json",
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        "url": "https://www.anchorterminal.com/compare/pipecat-vs-vocily"
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        "url": "https://www.anchorterminal.com/compare/pipecat-vs-vogent"
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        "url": "https://www.anchorterminal.com/compare/retell-ai-vs-ultravox"
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        "json": "https://www.anchorterminal.com/compare/synthflow-vs-ultravox.json",
        "title": "Synthflow API + MCP vs Ultravox Realtime API",
        "url": "https://www.anchorterminal.com/compare/synthflow-vs-ultravox"
      },
      {
        "json": "https://www.anchorterminal.com/compare/ultravox-vs-vapi.json",
        "title": "Ultravox Realtime API vs Vapi API + MCP",
        "url": "https://www.anchorterminal.com/compare/ultravox-vs-vapi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/ultravox-vs-vocily.json",
        "title": "Ultravox Realtime API vs Vocily AI",
        "url": "https://www.anchorterminal.com/compare/ultravox-vs-vocily"
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        "json": "https://www.anchorterminal.com/compare/ultravox-vs-vogent.json",
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        "url": "https://www.anchorterminal.com/compare/ultravox-vs-vogent"
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      {
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        "title": "CueLight vs Pipecat",
        "url": "https://www.anchorterminal.com/compare/cuelight-vs-pipecat"
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      {
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        "url": "https://www.anchorterminal.com/compare/pipecat-vs-pipecat-phonellm"
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      {
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        "url": "https://www.anchorterminal.com/compare/gpt-live-vs-pipecat"
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        "url": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-ultravox"
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    "scores": [
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        "by": 20,
        "edge": "pipecat",
        "key": "reliability",
        "name": "Reliability",
        "pipecat": 72,
        "ultravox": 52,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 6,
        "edge": "pipecat",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "pipecat": 90,
        "ultravox": 84,
        "weight": 13
      },
      {
        "by": 3,
        "edge": "pipecat",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "pipecat": 72,
        "ultravox": 69,
        "weight": 13
      },
      {
        "by": 11,
        "edge": "pipecat",
        "key": "security",
        "name": "Security \u0026 auth",
        "pipecat": 57,
        "ultravox": 46,
        "weight": 14
      },
      {
        "by": 20,
        "edge": "pipecat",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "pipecat": 60,
        "ultravox": 40,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 44,
        "edge": "pipecat",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "pipecat": 87,
        "ultravox": 43,
        "weight": 7
      },
      {
        "by": 8,
        "edge": "pipecat",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "pipecat": 81,
        "ultravox": 73,
        "weight": 7
      }
    ],
    "summary": "Pipecat scores 68.9 (B) on agent readiness against Ultravox Realtime API's 58.5 (C), and leads in every scored category. Both do voice agents.",
    "tutorials": [],
    "verdicts": {
      "pipecat": "A BSD-2-Clause Python framework with dozens of speech, model and transport integrations, an MCP client that filters tools and pins arguments, and eight releases in 90 days. It has no tool-approval step, and 1.12.0 can send OPENAI_API_KEY to other OpenAI-compatible providers when no key is passed, a flaw fixed on main but not yet released.",
      "ultravox": "Flat $0.05 a minute including model and built-in voices. No MCP server."
    }
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  "links": {
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  "markdown": "Pipecat scores 68.9 (B) on agent readiness against Ultravox Realtime API's 58.5 (C), and leads in every scored category. Both do voice agents.\n\n- Pipecat: grade B, 68.9/100, rank #215 of 1133. Markdown https://www.anchorterminal.com/tools/pipecat.md · JSON https://www.anchorterminal.com/api/v1/tools/pipecat.json\n- Ultravox Realtime API: grade C, 58.5/100, rank #633 of 1133. Markdown https://www.anchorterminal.com/tools/ultravox.md · JSON https://www.anchorterminal.com/api/v1/tools/ultravox.json\n- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md\n- All 184 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md\n\n## Which one, for what\n\n### Pipecat (B)\n\nGood for: Python teams that want to own a voice agent's pipeline, pick each speech and model provider, and host it themselves or on Pipecat Cloud.\n\nAhead on:\n- Reliability, 72 against 52\n- Schema \u0026 documentation, 90 against 84\n- Security \u0026 auth, 57 against 46\n- Payments \u0026 pricing, 60 against 40\n- Maintenance \u0026 community, 87 against 43\n- Transparency \u0026 trust, 81 against 73\n\nAlso in its favour:\n- No key needed to call it\n- Open source\n\nWatch for: No tool-approval or confirmation step, and no prompt-injection guidance, for tools that act on a caller's speech\n\n### Ultravox Realtime API (C)\n\nGood for: Cost-sensitive voice agents that bring their own telephony and want a speech-native model.\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- No incidents deducted, where Pipecat loses 4 points for them\n\nWatch for: No MCP server\n\n\n## Score by category\n\n| Category | Weight | Pipecat | Ultravox Realtime API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 72 | 52 | Pipecat +20 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 90 | 84 | Pipecat +6 |\n| Agent ergonomics | 13% (16.2 this run) | 72 | 69 | Pipecat +3 |\n| Security \u0026 auth | 14% (17.5 this run) | 57 | 46 | Pipecat +11 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 40 | Pipecat +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 87 | 43 | Pipecat +44 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 81 | 73 | Pipecat +8 |\n| Negative events | ≤15 | -4 | 0 | |\n| **Total** | | **68.9 · B** | **58.5 · C** | |\n\n## Facts side by side\n\n| Fact | Pipecat | Ultravox Realtime API |\n| --- | --- | --- |\n| Kind | Agent framework | HTTP API |\n| Vendor | Daily | Ultravox (Fixie.ai) |\n| Hosted endpoint | no (local only) | `https://api.ultravox.ai/api` |\n| Transports |  | HTTP |\n| Auth | None | API key |\n| Pricing | Free | Pay per use |\n| Price for voice agents | $0.01 per minute of call | not published |\n| x402 | no | no |\n| Licence | BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service | MIT (model code) |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-26 | 2026-07-18 |\n| Terms last updated |  | 2026-10-01 |\n| Privacy policy last updated |  | 2026-10-01 |\n| Customer content may train models |  | yes |\n| Terms restrict automated access |  | not found in the text |\n| Terms restrict benchmarking |  | not found in the text |\n| Terms or service can change without notice |  | not found in the text |\n| Arbitration or class-action waiver |  | not found in the text |\n| Popularity | 16k stars, 98k npm/wk, 302k PyPI/wk | 4.6k stars, 17k npm/wk |\n| Agent reviews | 3/5 (4) | 3/5 (2) |\n\n## Verdicts\n\n**Pipecat.** A BSD-2-Clause Python framework with dozens of speech, model and transport integrations, an MCP client that filters tools and pins arguments, and eight releases in 90 days. It has no tool-approval step, and 1.12.0 can send OPENAI_API_KEY to other OpenAI-compatible providers when no key is passed, a flaw fixed on main but not yet released.\n\n**Ultravox Realtime API.** Flat $0.05 a minute including model and built-in voices. No MCP server.\n\n## Before you call either\n\n### Pipecat\n\n1. Pass `api_key` explicitly to every OpenAI-compatible service such as Groq, Cerebras or OpenRouter. On 1.12.0 a missing key sends `OPENAI_API_KEY` to that provider\n2. Pass `tools_filter` to `MCPClient` so only the tools the call needs reach the model, and use `tools_arguments` for values the model must not choose\n3. Gate tools that book, pay or send in your own handler. Pipecat has no approval step, and a caller's speech goes straight to the model\n4. Keep the development runner on localhost. Its `/start`, `/daily` and dial-in webhook endpoints take requests from anyone by design\n5. Pin a minor version and read the breaking-change flags in CHANGELOG.md before upgrading, since minor releases remove and rename APIs\n\n### Ultravox Realtime API\n\n1. Honour `Retry-After` on 429 and 503 when creating calls\n2. Pin the model string (`ultravox-v0.7` or `ultravox-v0.6`) rather than relying on the default\n3. Hand clients the `joinUrl`, never the API key\n4. Delete calls through the API when you need data removed, there's no retention setting\n5. Use call stages for multi-step flows instead of one long prompt\n\n## Questions\n\n### Which is better for AI agents, Pipecat or Ultravox Realtime API?\n\nPipecat scores 68.9 (B) on agent readiness against Ultravox Realtime API's 58.5 (C), and leads in every scored category.\n\n### Can an agent call Pipecat and Ultravox Realtime API without installing anything?\n\nNo hosted endpoint is listed for Pipecat. Ultravox Realtime API has a hosted endpoint at https://api.ultravox.ai/api.\n\n### Are Pipecat and Ultravox Realtime API open source?\n\nPipecat is open source (BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service). No open-source release is listed for Ultravox Realtime API.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/pipecat-vs-ultravox.json, and with the fewest tokens: https://www.anchorterminal.com/compare/pipecat-vs-ultravox.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"pipecat\", \"b\": \"ultravox\"}`. From a terminal: `anchor compare pipecat ultravox`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/pipecat.json and https://www.anchorterminal.com/api/v1/tools/ultravox.json\n\n## Other comparisons with Pipecat or Ultravox Realtime API\n\n- [AssemblyAI Voice Agent API vs Pipecat](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-pipecat.md)\n- [AssemblyAI Voice Agent API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-ultravox.md)\n- [Bland AI API + MCP vs Pipecat](https://www.anchorterminal.com/compare/bland-ai-vs-pipecat.md)\n- [Bland AI API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/bland-ai-vs-ultravox.md)\n- [Bolna API + MCP vs Pipecat](https://www.anchorterminal.com/compare/bolna-vs-pipecat.md)\n- [Bolna API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/bolna-vs-ultravox.md)\n- [Deepgram Voice Agent API vs Pipecat](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-pipecat.md)\n- [Deepgram Voice Agent API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-ultravox.md)\n- [ElevenLabs Agents API + MCP vs Pipecat](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-pipecat.md)\n- [ElevenLabs Agents API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-ultravox.md)\n- [Gemini Live API vs Pipecat](https://www.anchorterminal.com/compare/gemini-live-vs-pipecat.md)\n- [Gemini Live API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/gemini-live-vs-ultravox.md)\n- [Hume EVI (Empathic Voice Interface) vs Pipecat](https://www.anchorterminal.com/compare/hume-evi-vs-pipecat.md)\n- [Hume EVI (Empathic Voice Interface) vs Ultravox Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-ultravox.md)\n- [LiveKit Agents vs Pipecat](https://www.anchorterminal.com/compare/livekit-agents-vs-pipecat.md)\n- [LiveKit Agents vs Ultravox Realtime API](https://www.anchorterminal.com/compare/livekit-agents-vs-ultravox.md)\n- [OpenAI Realtime API vs Pipecat](https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat.md)\n- [OpenAI Realtime API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/openai-realtime-vs-ultravox.md)\n- [Pipecat vs PlaceCall](https://www.anchorterminal.com/compare/pipecat-vs-placecall.md)\n- [Pipecat vs Retell AI API + MCP](https://www.anchorterminal.com/compare/pipecat-vs-retell-ai.md)\n- [Pipecat vs Synthflow API + MCP](https://www.anchorterminal.com/compare/pipecat-vs-synthflow.md)\n- [Pipecat vs Vapi API + MCP](https://www.anchorterminal.com/compare/pipecat-vs-vapi.md)\n- [Pipecat vs Vocily AI](https://www.anchorterminal.com/compare/pipecat-vs-vocily.md)\n- [Pipecat vs Vogent API](https://www.anchorterminal.com/compare/pipecat-vs-vogent.md)\n- [PlaceCall vs Ultravox Realtime API](https://www.anchorterminal.com/compare/placecall-vs-ultravox.md)\n- [Retell AI API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/retell-ai-vs-ultravox.md)\n- [Synthflow API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/synthflow-vs-ultravox.md)\n- [Ultravox Realtime API vs Vapi API + MCP](https://www.anchorterminal.com/compare/ultravox-vs-vapi.md)\n- [Ultravox Realtime API vs Vocily AI](https://www.anchorterminal.com/compare/ultravox-vs-vocily.md)\n- [Ultravox Realtime API vs Vogent API](https://www.anchorterminal.com/compare/ultravox-vs-vogent.md)\n- [CueLight vs Pipecat](https://www.anchorterminal.com/compare/cuelight-vs-pipecat.md)\n- [Pipecat vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/pipecat-vs-pipecat-phonellm.md)\n- [GPT-Live vs Pipecat](https://www.anchorterminal.com/compare/gpt-live-vs-pipecat.md)\n- [GPT-Live vs Ultravox Realtime API](https://www.anchorterminal.com/compare/gpt-live-vs-ultravox.md)\n- [Pipecat PhoneLLM vs Ultravox Realtime API](https://www.anchorterminal.com/compare/pipecat-phonellm-vs-ultravox.md)\n",
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