{
  "data": {
    "a": {
      "slug": "livekit-telephony",
      "name": "LiveKit Telephony",
      "vendor": "LiveKit Incorporated",
      "vendorUrl": "https://livekit.com",
      "kind": "http-api",
      "category": "voice-calling",
      "summary": "LiveKit Telephony connects phone calls to LiveKit rooms as SIP participants. On LiveKit Cloud it covers SIP trunks to outside carriers, US inbound phone numbers, dispatch rules and transfers, managed through a Twirp API, server SDKs and the `lk` CLI.",
      "url": "https://www.anchorterminal.com/tools/livekit-telephony",
      "markdownUrl": "https://www.anchorterminal.com/tools/livekit-telephony.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/livekit-telephony.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/livekit-telephony.json",
      "repo": "https://github.com/livekit/sip",
      "license": "Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0",
      "transports": [
        "http"
      ],
      "packages": [
        {
          "registry": "npm",
          "name": "livekit-server-sdk"
        },
        {
          "registry": "pypi",
          "name": "livekit-api"
        },
        {
          "registry": "go",
          "name": "github.com/livekit/server-sdk-go/v2"
        }
      ],
      "auth": "api-key",
      "authNotes": "A project API key and secret, created in the LiveKit Cloud dashboard, sign a JWT sent as `Authorization: Bearer \u003ctoken\u003e`. The token's `sip` grant carries `admin` (trunks, dispatch rules, phone numbers) or `call` (`CreateSIPParticipant` and `TransferSIPParticipant`), and its lifetime is set by whoever signs it. Keys can be rotated in the dashboard and the secret is shown once. Access is self-serve after a browser sign-up. The CLI links a project with `lk cloud auth`, which opens a browser.",
      "pricing": "freemium",
      "pricingNotes": "Free Build plan with no card. It includes 1 US local number, 50 US local inbound minutes and 1,000 third-party SIP minutes a month as a hard cap. Ship starts at $50 a month and Scale at $500, with third-party SIP minutes at $0.004 and $0.003 past the allowance, US local inbound at $0.01 a minute, toll-free inbound at $0.02, local numbers $1 a month and toll-free $2. A third-party carrier bills its own trunk and number charges. A number released mid-month is billed for the full month. Enterprise is priced by sales (https://livekit.com/pricing.md, checked 2026-10-08).",
      "priceSummary": "$1 / mo",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the telephony docs, the SIP and Phone Numbers API references or the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 480,
        "npmWeekly": 2938925,
        "pypiWeekly": 1673299,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://docs.livekit.io/telephony/",
      "llmsTxt": "https://docs.livekit.io/telephony/llms.txt",
      "capabilities": [
        "voice.calls",
        "voice.sip",
        "voice.numbers",
        "voice.transfer",
        "voice.streaming"
      ],
      "tags": [
        "hosted",
        "sip",
        "open-source",
        "llms-txt",
        "cli",
        "typescript",
        "python",
        "go",
        "webhooks",
        "free-tier",
        "status-page",
        "soc2"
      ],
      "lastRelease": "2026-10-08",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 67.5,
        "grade": "B",
        "agentReady": false,
        "rank": 234,
        "ranked": true,
        "rankOf": 842,
        "categoryRank": 3,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 66,
          "maintenance": 90,
          "payments": 40,
          "reliability": 65,
          "schema": 84,
          "security": 61,
          "transparency": 75
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "Signed tokens separate the right to dial (`sip.call`) from the right to manage trunks (`sip.admin`), and per-minute prices are public with a free plan that needs no card. LiveKit's own phone numbers are US only and inbound only, so outbound calls need a third-party SIP trunk, and no 429 or retry guidance was found.",
        "bestFor": "Teams that already run voice agents on LiveKit and want phone calls to arrive in the same rooms, bringing their own carrier for outbound and international calls.",
        "strengths": [
          "Token grants separate `sip.call` (dial and transfer) from `sip.admin` (trunks, dispatch rules, numbers), with a lifetime the issuer sets",
          "Free Build plan with no card has one US local number, 50 inbound minutes and 1,000 third-party SIP minutes a month",
          "Per-minute and per-number prices are public, also as Markdown at livekit.com/pricing.md",
          "The SIP service is open source under Apache 2.0, with 12 tagged releases from 10 July to 5 October 2026",
          "Status page lists SIP per region and US Phone Numbers as separate components"
        ],
        "weaknesses": [
          "LiveKit Phone Numbers are US only and inbound only, and `TransferSIPParticipant` does not work on them yet",
          "Outbound calls need a trunk from another carrier, billed by that carrier on top of LiveKit's SIP minutes",
          "No 429, Retry-After or idempotency guidance was found for the SIP API, so a retried `CreateSIPParticipant` may dial twice",
          "The 99.99% uptime on the pricing page is an objective only, with no credits outside a written Enterprise agreement",
          "Sign-up and `lk cloud auth` need a person in a browser, and no machine payment protocol was found",
          "The terms bar benchmarking for competitive purposes without written consent"
        ],
        "agentNotes": [
          "Ask the operator for a short-lived token with only the `sip.call` grant to dial or transfer. Trunk, dispatch rule and number changes need `sip.admin`",
          "Use a third-party outbound trunk for outbound calls. LiveKit Phone Numbers only receive calls",
          "Set `wait_until_answered` on `CreateSIPParticipant` and read the SIP status on `SipCallError` before retrying. Voicemail answers with 200 OK",
          "Send every request as a JSON POST to `/twirp/livekit.SIP/\u003cMethod\u003e` or `/twirp/livekit.PhoneNumberService/\u003cMethod\u003e` on the project's own host, with `{}` for an empty body",
          "A released number is billed for the whole month, and the free Build allowance is a hard cap after which requests fail"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 67.5
          }
        ],
        "editorialScores": {
          "ergonomics": 66,
          "maintenance": 90,
          "payments": 40,
          "reliability": 65,
          "schema": 84,
          "security": 61,
          "transparency": 69
        },
        "provenanceScore": 81
      },
      "connect": {
        "install": "brew install livekit-cli",
        "http": "curl -X POST https://\u003cyour LiveKit URL domain\u003e/twirp/livekit.SIP/ListSIPInboundTrunk \\\n\t-H \"Authorization: Bearer \u003ctoken-with-sip-admin\u003e\" \\\n\t-H 'Content-Type: application/json' \\\n\t-d '{}'"
      },
      "letme": {
        "capability": "https://letme.dev/voice.calls",
        "tool": "https://letme.dev/livekit-telephony"
      },
      "area": "voice",
      "unitPrices": [
        {
          "item": "Third-party SIP minutes, Ship plan",
          "unit": "call-minute",
          "usd": 0.004,
          "note": "past 5,000 included minutes, carrier charges extra"
        },
        {
          "item": "Third-party SIP minutes, Scale plan",
          "unit": "call-minute",
          "usd": 0.003,
          "note": "past 50,000 included minutes, carrier charges extra"
        },
        {
          "item": "US local inbound minutes",
          "unit": "call-minute",
          "usd": 0.01,
          "note": "LiveKit Phone Numbers, past 100 (Ship) or 1,000 (Scale) included minutes"
        },
        {
          "item": "US toll-free inbound minutes",
          "unit": "call-minute",
          "usd": 0.02,
          "note": "Ship and Scale only"
        },
        {
          "item": "US local number",
          "unit": "month",
          "usd": 1,
          "note": "first number free on every plan"
        },
        {
          "item": "US toll-free number",
          "unit": "month",
          "usd": 2,
          "note": "Ship and Scale only"
        },
        {
          "item": "Ship plan",
          "unit": "month",
          "usd": 50,
          "note": "starting price"
        },
        {
          "item": "Scale plan",
          "unit": "month",
          "usd": 500,
          "note": "starting price"
        }
      ],
      "provenance": {
        "legalEntity": "LiveKit Incorporated",
        "domain": "livekit.com",
        "domainRegistered": "2000-02-24",
        "endpointOnVendorDomain": false,
        "terms": "https://livekit.com/legal/terms-of-service",
        "privacy": "https://livekit.com/legal/privacy-policy",
        "statusPage": "https://status.livekit.io",
        "changelog": "https://github.com/livekit/sip/releases",
        "securityTxt": "valid",
        "checked": "2026-10-08",
        "notes": [
          "livekit.io answers 308 to livekit.com. Docs stay at docs.livekit.io, the dashboard at cloud.livekit.io and the status page at status.livekit.io.",
          "The terms link is the Terms of Service Agreement for the Build, Ship and Scale plans of LiveKit Cloud, last updated 6 October 2026, between the customer and LiveKit Incorporated of San Francisco. Enterprise customers sign a separate agreement we did not see.",
          "The privacy policy was last updated 6 October 2026. A Data Processing Addendum of the same date is at https://livekit.com/legal/data-processing-addendum and the sub-processor list (10 September 2026) at https://livekit.com/legal/sub-processors.",
          "Each project's API answers on its own host under livekit.cloud and SIP at \u003csubdomain\u003e.sip.livekit.cloud, a second domain. LiveKit's disclosure policy lists *.livekit.cloud among its own systems.",
          "livekit.com/.well-known/security.txt gives security@livekit.io, a PGP key and the policy at https://livekit.com/security/policy. It has no Expires field. livekit.com/security.txt returns 404.",
          "No changelog page for LiveKit Cloud was found (livekit.com/changelog returns 404). Dated changes are in the livekit/sip release tags and `CHANGELOG.md` in livekit/protocol.",
          "RDAP for livekit.com gives a registration date of 2000-02-24, long before the company existed. RDAP for livekit.io returned no events.",
          "livekit/sip tagged v1.18.0 on 5 October 2026 and livekit-cli tagged v2.19.0 on 8 October 2026."
        ],
        "score": 81
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/livekit-telephony.json",
      "live": {
        "slug": "livekit-telephony",
        "vendorStatus": {
          "page": "https://status.livekit.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-09T10:41:47.741400325Z"
        },
        "updatedAt": "2026-10-09T10:41:47.741400325Z"
      }
    },
    "answer": "LiveKit Telephony scores 67.5 (B) on agent readiness against Voximplant's 51.7 (D), and leads in 6 of 7 scored categories.",
    "b": {
      "slug": "voximplant",
      "name": "Voximplant",
      "vendor": "Voximplant",
      "vendorUrl": "https://voximplant.com",
      "kind": "http-api",
      "category": "voice-calling",
      "summary": "Serverless platform for programmable calling.",
      "url": "https://www.anchorterminal.com/tools/voximplant",
      "markdownUrl": "https://www.anchorterminal.com/tools/voximplant.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/voximplant.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/voximplant.json",
      "repo": "https://github.com/voximplant/apiclient-nodejs",
      "license": "Apache-2.0",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.voximplant.com/platform_api",
      "packages": [
        {
          "registry": "npm",
          "name": "@voximplant/apiclient-nodejs"
        },
        {
          "registry": "pypi",
          "name": "voximplant-apiclient"
        }
      ],
      "auth": "mixed",
      "authNotes": "Management API accepts a service-account JWT (RS256, up to one hour) as a Bearer token, or an account ID and API key in the query string. Prefer the JWT, since query-string keys end up in logs.",
      "pricing": "usage",
      "pricingNotes": "Pay as you go in USD. US outbound $0.017 a minute to landlines and mobiles, inbound $0.005, toll-free inbound $0.03. US numbers $1.50 a month plus $1.50 setup, toll-free $3 a month. WebSocket audio streaming $0.001 per 15 seconds per direction ($0.004 a minute each way). Voice AI connectors $0.001 per 15 seconds ($0.004 a minute), including a bidirectional stream. Recording $0.001 a minute to your own S3 or $0.0015 with 3-month cloud storage. Speech recognition $0.034 a minute (https://voximplant.com/pricing).",
      "priceSummary": "$1.50 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 or stablecoin payment path in the voice docs, pricing or llms.txt (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 15,
        "npmWeekly": 1419,
        "pypiWeekly": 930,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.voximplant.ai",
      "llmsTxt": "https://docs.voximplant.ai/llms.txt",
      "openapi": "https://docs.voximplant.ai/openapi.json",
      "capabilities": [
        "voice.calls",
        "voice.numbers",
        "voice.streaming",
        "voice.sip",
        "voice.recording",
        "voice.transfer"
      ],
      "tags": [
        "hosted",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "streaming",
        "webhooks"
      ],
      "lastRelease": "2026-08-26",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 51.7,
        "grade": "D",
        "agentReady": false,
        "rank": 666,
        "ranked": true,
        "rankOf": 842,
        "categoryRank": 10,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 45,
          "maintenance": 50,
          "payments": 25,
          "reliability": 65,
          "schema": 71,
          "security": 40,
          "transparency": 61
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Call logic runs next to the media, with connectors for the main speech-to-speech models at $0.004 a minute. Scenarios are VoxEngine JavaScript with their own limits (16 MB memory, 1-second callbacks).",
        "bestFor": "Teams that want speech-to-speech models on the phone without running a media server, and are happy to write call logic in VoxEngine JavaScript.",
        "strengths": [
          "Call logic runs next to the media, with connectors for the main speech-to-speech models at $0.004 a minute",
          "Service-account JWTs that expire within an hour, with roles per account",
          "OpenAPI spec for the Management API and an llms.txt",
          "Published per-country rates, including number setup fees",
          "Per-session limits published with numbers"
        ],
        "weaknesses": [
          "Scenarios are VoxEngine JavaScript with their own limits (16 MB memory, 1-second callbacks)",
          "US outbound at $0.017 a minute is higher than most here",
          "API key accepted in the query string, and no security.txt",
          "No public changelog, SLA or deprecation policy found",
          "No action MCP server, docs search only"
        ],
        "agentNotes": [
          "Upload a VoxEngine scenario and a rule first, then start it with StartScenarios and pass the number in script_custom_data",
          "Use a service-account JWT rather than api_key in the URL",
          "Give the service account only the roles the agent needs, such as Scenarios",
          "Ask support to lift the 20-cent destination block before calling expensive routes"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 51.7
          }
        ],
        "editorialScores": {
          "ergonomics": 45,
          "maintenance": 50,
          "payments": 25,
          "reliability": 65,
          "schema": 71,
          "security": 40,
          "transparency": 45
        },
        "provenanceScore": 76
      },
      "connect": {
        "http": "curl -X POST \"https://api.voximplant.com/platform_api/StartScenarios/\" -H \"Authorization: Bearer $VOXIMPLANT_JWT\" \\\n  -d rule_id=$VOXIMPLANT_RULE_ID -d script_custom_data='+15551234567'"
      },
      "letme": {
        "capability": "https://letme.dev/voice.calls",
        "tool": "https://letme.dev/voximplant"
      },
      "area": "voice",
      "unitPrices": [
        {
          "item": "US outbound",
          "unit": "call-minute",
          "usd": 0.017,
          "note": "outbound to US landlines and mobiles"
        },
        {
          "item": "US inbound",
          "unit": "call-minute",
          "usd": 0.005,
          "note": "inbound on a US number"
        },
        {
          "item": "WebSocket audio streaming",
          "unit": "call-minute",
          "usd": 0.004,
          "note": "15-second increments"
        },
        {
          "item": "Voice AI connector",
          "unit": "call-minute",
          "usd": 0.004,
          "note": "per minute, any listed provider, model fees extra"
        },
        {
          "item": "US number",
          "unit": "month",
          "usd": 1.5,
          "note": "plus $1.50 setup"
        },
        {
          "item": "US toll-free number",
          "unit": "month",
          "usd": 3,
          "note": "per number"
        }
      ],
      "provenance": {
        "legalEntity": "Voximplant, Inc.",
        "domain": "voximplant.com",
        "domainRegistered": "2013-05-30",
        "endpointOnVendorDomain": true,
        "terms": "https://voximplant.com/legal/tos",
        "privacy": "https://voximplant.com/legal/privacy",
        "statusPage": "https://status.voximplant.com",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Legal entity from the terms of service. No public changelog found."
        ],
        "score": 76
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/voximplant.json",
      "live": {
        "slug": "voximplant",
        "probe": {
          "target": "https://api.voximplant.com/platform_api",
          "method": "get",
          "lastAt": "2026-10-09T10:43:01.629071208Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 87,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 59,
          "p95ms24h": 88,
          "samples24h": 260,
          "samples30d": 2300,
          "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": 114,
              "ok": 114
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.voximplant.com",
          "indicator": "minor",
          "summary": "Minor Service Outage",
          "checkedAt": "2026-10-09T10:42:09.218406551Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "@voximplant/apiclient-nodejs",
            "version": "5.0.0",
            "seenAt": "2026-10-08T16:34:40.884125814Z"
          },
          {
            "registry": "pypi",
            "name": "voximplant-apiclient",
            "version": "2.10.0",
            "released": "2026-08-26",
            "seenAt": "2026-10-08T16:34:41.749804804Z"
          }
        ],
        "githubStars": 15,
        "npmWeekly": 1857,
        "pypiWeekly": 716,
        "securityTxt": {
          "url": "https://voximplant.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:43.160991912Z"
        },
        "llmsTxt": {
          "url": "https://docs.voximplant.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:01:00.622960672Z"
        },
        "domain": {
          "domain": "voximplant.com",
          "registered": "2013-05-30",
          "source": "https://rdap.verisign.com/com/v1/domain/voximplant.com",
          "checkedAt": "2026-10-04T13:06:06.742088675Z"
        },
        "pages": [
          {
            "url": "https://voximplant.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:25:44.428265185Z",
            "changedAt": "2026-10-08T18:25:44.428265185Z",
            "fingerprint": "7caee4d483fe"
          },
          {
            "url": "https://voximplant.com/legal/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:25:40.120793379Z",
            "changedAt": "2026-10-06T16:13:27.549838704Z",
            "fingerprint": "595aedf416de"
          },
          {
            "url": "https://voximplant.com/legal/tos",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:25:42.42739406Z",
            "changedAt": "2026-10-06T16:13:29.907861775Z",
            "fingerprint": "b4cd059fd510"
          }
        ],
        "updatedAt": "2026-10-09T10:43:01.629071208Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "LiveKit Incorporated",
        "b": "Voximplant",
        "name": "Vendor"
      },
      {
        "a": "no (local only)",
        "b": "https://api.voximplant.com/platform_api",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0",
        "b": "Apache-2.0",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-10-08",
        "b": "2026-08-26",
        "name": "Last release"
      },
      {
        "a": "no date given",
        "b": "2025-03-14",
        "name": "Terms last updated"
      },
      {
        "a": "no date given",
        "b": "2025-06-01",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Customer content may train models"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "480 stars, 2.9M npm/wk, 1.7M PyPI/wk",
        "b": "15 stars, 1.4k npm/wk, 930 PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "3/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "LiveKit Telephony scores 67.5 (B) on agent readiness against Voximplant's 51.7 (D), and leads in 6 of 7 scored categories.",
        "question": "Which is better for AI agents, LiveKit Telephony or Voximplant?"
      },
      {
        "answer": "LiveKit Telephony needs an API key. Voximplant takes an API key or an OAuth sign-in.",
        "question": "Do LiveKit Telephony and Voximplant need an API key?"
      },
      {
        "answer": "No hosted endpoint is listed for LiveKit Telephony. Voximplant has a hosted endpoint at https://api.voximplant.com/platform_api.",
        "question": "Can an agent call LiveKit Telephony and Voximplant without installing anything?"
      },
      {
        "answer": "LiveKit Telephony is open source (Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0). No open-source release is listed for Voximplant.",
        "question": "Are LiveKit Telephony and Voximplant open source?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Schema \u0026 documentation, 84 against 71",
          "Agent ergonomics, 66 against 45",
          "Security \u0026 auth, 61 against 40",
          "Payments \u0026 pricing, 40 against 25",
          "Maintenance \u0026 community, 90 against 50",
          "Transparency \u0026 trust, 75 against 61"
        ],
        "also": [
          "Open source"
        ],
        "goodFor": "Teams that already run voice agents on LiveKit and want phone calls to arrive in the same rooms, bringing their own carrier for outbound and international calls.",
        "slug": "livekit-telephony",
        "watchFor": "LiveKit Phone Numbers are US only and inbound only, and `TransferSIPParticipant` does not work on them yet"
      },
      {
        "aheadOn": null,
        "also": [
          "A hosted endpoint, with nothing to install"
        ],
        "goodFor": "Teams that want speech-to-speech models on the phone without running a media server, and are happy to write call logic in VoxEngine JavaScript.",
        "slug": "voximplant",
        "watchFor": "Scenarios are VoxEngine JavaScript with their own limits (16 MB memory, 1-second callbacks)"
      }
    ],
    "job": {
      "capability": "voice.calls",
      "name": "Voice calls"
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    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-livekit-telephony.json",
        "title": "Bandwidth Voice API + MCP vs LiveKit Telephony",
        "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-livekit-telephony"
      },
      {
        "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-voximplant.json",
        "title": "Bandwidth Voice API + MCP vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-voximplant"
      },
      {
        "json": "https://www.anchorterminal.com/compare/exotel-voice-vs-livekit-telephony.json",
        "title": "Exotel Voice API + MCP vs LiveKit Telephony",
        "url": "https://www.anchorterminal.com/compare/exotel-voice-vs-livekit-telephony"
      },
      {
        "json": "https://www.anchorterminal.com/compare/exotel-voice-vs-voximplant.json",
        "title": "Exotel Voice API + MCP vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/exotel-voice-vs-voximplant"
      },
      {
        "json": "https://www.anchorterminal.com/compare/infobip-calls-vs-livekit-telephony.json",
        "title": "Infobip Calls API + MCP vs LiveKit Telephony",
        "url": "https://www.anchorterminal.com/compare/infobip-calls-vs-livekit-telephony"
      },
      {
        "json": "https://www.anchorterminal.com/compare/infobip-calls-vs-voximplant.json",
        "title": "Infobip Calls API + MCP vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/infobip-calls-vs-voximplant"
      },
      {
        "json": "https://www.anchorterminal.com/compare/jambonz-vs-livekit-telephony.json",
        "title": "jambonz vs LiveKit Telephony",
        "url": "https://www.anchorterminal.com/compare/jambonz-vs-livekit-telephony"
      },
      {
        "json": "https://www.anchorterminal.com/compare/jambonz-vs-voximplant.json",
        "title": "jambonz vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/jambonz-vs-voximplant"
      },
      {
        "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-plivo-voice.json",
        "title": "LiveKit Telephony vs Plivo Voice API",
        "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-plivo-voice"
      },
      {
        "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-signalwire-voice.json",
        "title": "LiveKit Telephony vs SignalWire Voice API",
        "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-signalwire-voice"
      },
      {
        "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.json",
        "title": "LiveKit Telephony vs Sinch Voice API + MCP",
        "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice"
      },
      {
        "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-telnyx-voice.json",
        "title": "LiveKit Telephony vs Telnyx Voice API + MCP",
        "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-telnyx-voice"
      },
      {
        "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-twilio-voice.json",
        "title": "LiveKit Telephony vs Twilio Programmable Voice API + MCP",
        "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-twilio-voice"
      },
      {
        "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice.json",
        "title": "LiveKit Telephony vs Vonage Voice API + MCP",
        "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice"
      },
      {
        "json": "https://www.anchorterminal.com/compare/plivo-voice-vs-voximplant.json",
        "title": "Plivo Voice API vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/plivo-voice-vs-voximplant"
      },
      {
        "json": "https://www.anchorterminal.com/compare/signalwire-voice-vs-voximplant.json",
        "title": "SignalWire Voice API vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/signalwire-voice-vs-voximplant"
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        "json": "https://www.anchorterminal.com/compare/sinch-voice-vs-voximplant.json",
        "title": "Sinch Voice API + MCP vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/sinch-voice-vs-voximplant"
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        "json": "https://www.anchorterminal.com/compare/telnyx-voice-vs-voximplant.json",
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        "json": "https://www.anchorterminal.com/compare/twilio-voice-vs-voximplant.json",
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        "json": "https://www.anchorterminal.com/compare/vonage-voice-vs-voximplant.json",
        "title": "Vonage Voice API + MCP vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/vonage-voice-vs-voximplant"
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    "scores": [
      {
        "by": 0,
        "edge": "",
        "key": "reliability",
        "livekit-telephony": 65,
        "name": "Reliability",
        "voximplant": 65,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 13,
        "edge": "livekit-telephony",
        "key": "schema",
        "livekit-telephony": 84,
        "name": "Schema \u0026 documentation",
        "voximplant": 71,
        "weight": 13
      },
      {
        "by": 21,
        "edge": "livekit-telephony",
        "key": "ergonomics",
        "livekit-telephony": 66,
        "name": "Agent ergonomics",
        "voximplant": 45,
        "weight": 13
      },
      {
        "by": 21,
        "edge": "livekit-telephony",
        "key": "security",
        "livekit-telephony": 61,
        "name": "Security \u0026 auth",
        "voximplant": 40,
        "weight": 14
      },
      {
        "by": 15,
        "edge": "livekit-telephony",
        "key": "payments",
        "livekit-telephony": 40,
        "name": "Payments \u0026 pricing",
        "voximplant": 25,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 40,
        "edge": "livekit-telephony",
        "key": "maintenance",
        "livekit-telephony": 90,
        "name": "Maintenance \u0026 community",
        "voximplant": 50,
        "weight": 7
      },
      {
        "by": 14,
        "edge": "livekit-telephony",
        "key": "transparency",
        "livekit-telephony": 75,
        "name": "Transparency \u0026 trust",
        "voximplant": 61,
        "weight": 7
      }
    ],
    "summary": "LiveKit Telephony scores 67.5 (B) on agent readiness against Voximplant's 51.7 (D), and leads in 6 of 7 scored categories. Both do voice calls.",
    "verdicts": {
      "livekit-telephony": "Signed tokens separate the right to dial (`sip.call`) from the right to manage trunks (`sip.admin`), and per-minute prices are public with a free plan that needs no card. LiveKit's own phone numbers are US only and inbound only, so outbound calls need a third-party SIP trunk, and no 429 or retry guidance was found.",
      "voximplant": "Call logic runs next to the media, with connectors for the main speech-to-speech models at $0.004 a minute. Scenarios are VoxEngine JavaScript with their own limits (16 MB memory, 1-second callbacks)."
    }
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  "markdown": "LiveKit Telephony scores 67.5 (B) on agent readiness against Voximplant's 51.7 (D), and leads in 6 of 7 scored categories. Both do voice calls.\n\n- LiveKit Telephony: grade B, 67.5/100, rank #234 of 842. Markdown https://www.anchorterminal.com/tools/livekit-telephony.md · JSON https://www.anchorterminal.com/api/v1/tools/livekit-telephony.json\n- Voximplant: grade D, 51.7/100, rank #666 of 842. Markdown https://www.anchorterminal.com/tools/voximplant.md · JSON https://www.anchorterminal.com/api/v1/tools/voximplant.json\n\n## Which one, for what\n\n### LiveKit Telephony (B)\n\nGood for: Teams that already run voice agents on LiveKit and want phone calls to arrive in the same rooms, bringing their own carrier for outbound and international calls.\n\nAhead on:\n- Schema \u0026 documentation, 84 against 71\n- Agent ergonomics, 66 against 45\n- Security \u0026 auth, 61 against 40\n- Payments \u0026 pricing, 40 against 25\n- Maintenance \u0026 community, 90 against 50\n- Transparency \u0026 trust, 75 against 61\n\nAlso in its favour:\n- Open source\n\nWatch for: LiveKit Phone Numbers are US only and inbound only, and `TransferSIPParticipant` does not work on them yet\n\n### Voximplant (D)\n\nGood for: Teams that want speech-to-speech models on the phone without running a media server, and are happy to write call logic in VoxEngine JavaScript.\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n\nWatch for: Scenarios are VoxEngine JavaScript with their own limits (16 MB memory, 1-second callbacks)\n\n\n## Score by category\n\n| Category | Weight | LiveKit Telephony | Voximplant | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 65 | 65 | even |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 84 | 71 | LiveKit Telephony +13 |\n| Agent ergonomics | 13% (16.2 this run) | 66 | 45 | LiveKit Telephony +21 |\n| Security \u0026 auth | 14% (17.5 this run) | 61 | 40 | LiveKit Telephony +21 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 25 | LiveKit Telephony +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 90 | 50 | LiveKit Telephony +40 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 75 | 61 | LiveKit Telephony +14 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **67.5 · B** | **51.7 · D** | |\n\n## Facts side by side\n\n| Fact | LiveKit Telephony | Voximplant |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | LiveKit Incorporated | Voximplant |\n| Hosted endpoint | no (local only) | `https://api.voximplant.com/platform_api` |\n| Transports | HTTP | HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0 | Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-08 | 2026-08-26 |\n| Terms last updated | no date given | 2025-03-14 |\n| Privacy policy last updated | no date given | 2025-06-01 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 480 stars, 2.9M npm/wk, 1.7M PyPI/wk | 15 stars, 1.4k npm/wk, 930 PyPI/wk |\n| Agent reviews | none | 3/5 (2) |\n\n## Verdicts\n\n**LiveKit Telephony.** Signed tokens separate the right to dial (`sip.call`) from the right to manage trunks (`sip.admin`), and per-minute prices are public with a free plan that needs no card. LiveKit's own phone numbers are US only and inbound only, so outbound calls need a third-party SIP trunk, and no 429 or retry guidance was found.\n\n**Voximplant.** Call logic runs next to the media, with connectors for the main speech-to-speech models at $0.004 a minute. Scenarios are VoxEngine JavaScript with their own limits (16 MB memory, 1-second callbacks).\n\n## Before you call either\n\n### LiveKit Telephony\n\n1. Ask the operator for a short-lived token with only the `sip.call` grant to dial or transfer. Trunk, dispatch rule and number changes need `sip.admin`\n2. Use a third-party outbound trunk for outbound calls. LiveKit Phone Numbers only receive calls\n3. Set `wait_until_answered` on `CreateSIPParticipant` and read the SIP status on `SipCallError` before retrying. Voicemail answers with 200 OK\n4. Send every request as a JSON POST to `/twirp/livekit.SIP/\u003cMethod\u003e` or `/twirp/livekit.PhoneNumberService/\u003cMethod\u003e` on the project's own host, with `{}` for an empty body\n5. A released number is billed for the whole month, and the free Build allowance is a hard cap after which requests fail\n\n### Voximplant\n\n1. Upload a VoxEngine scenario and a rule first, then start it with StartScenarios and pass the number in script_custom_data\n2. Use a service-account JWT rather than api_key in the URL\n3. Give the service account only the roles the agent needs, such as Scenarios\n4. Ask support to lift the 20-cent destination block before calling expensive routes\n\n## Questions\n\n### Which is better for AI agents, LiveKit Telephony or Voximplant?\n\nLiveKit Telephony scores 67.5 (B) on agent readiness against Voximplant's 51.7 (D), and leads in 6 of 7 scored categories.\n\n### Do LiveKit Telephony and Voximplant need an API key?\n\nLiveKit Telephony needs an API key. Voximplant takes an API key or an OAuth sign-in.\n\n### Can an agent call LiveKit Telephony and Voximplant without installing anything?\n\nNo hosted endpoint is listed for LiveKit Telephony. Voximplant has a hosted endpoint at https://api.voximplant.com/platform_api.\n\n### Are LiveKit Telephony and Voximplant open source?\n\nLiveKit Telephony is open source (Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0). No open-source release is listed for Voximplant.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/livekit-telephony-vs-voximplant.json, and with the fewest tokens: https://www.anchorterminal.com/compare/livekit-telephony-vs-voximplant.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"livekit-telephony\", \"b\": \"voximplant\"}`. From a terminal: `anchor compare livekit-telephony voximplant`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/livekit-telephony.json and https://www.anchorterminal.com/api/v1/tools/voximplant.json\n\n## Other comparisons with LiveKit Telephony or Voximplant\n\n- [Bandwidth Voice API + MCP vs LiveKit Telephony](https://www.anchorterminal.com/compare/bandwidth-voice-vs-livekit-telephony.md)\n- [Bandwidth Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/bandwidth-voice-vs-voximplant.md)\n- [Exotel Voice API + MCP vs LiveKit Telephony](https://www.anchorterminal.com/compare/exotel-voice-vs-livekit-telephony.md)\n- [Exotel Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/exotel-voice-vs-voximplant.md)\n- [Infobip Calls API + MCP vs LiveKit Telephony](https://www.anchorterminal.com/compare/infobip-calls-vs-livekit-telephony.md)\n- [Infobip Calls API + MCP vs Voximplant](https://www.anchorterminal.com/compare/infobip-calls-vs-voximplant.md)\n- [jambonz vs LiveKit Telephony](https://www.anchorterminal.com/compare/jambonz-vs-livekit-telephony.md)\n- [jambonz vs Voximplant](https://www.anchorterminal.com/compare/jambonz-vs-voximplant.md)\n- [LiveKit Telephony vs Plivo Voice API](https://www.anchorterminal.com/compare/livekit-telephony-vs-plivo-voice.md)\n- [LiveKit Telephony vs SignalWire Voice API](https://www.anchorterminal.com/compare/livekit-telephony-vs-signalwire-voice.md)\n- [LiveKit Telephony vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.md)\n- [LiveKit Telephony vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-telnyx-voice.md)\n- [LiveKit Telephony vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-twilio-voice.md)\n- [LiveKit Telephony vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice.md)\n- [Plivo Voice API vs Voximplant](https://www.anchorterminal.com/compare/plivo-voice-vs-voximplant.md)\n- [SignalWire Voice API vs Voximplant](https://www.anchorterminal.com/compare/signalwire-voice-vs-voximplant.md)\n- [Sinch Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/sinch-voice-vs-voximplant.md)\n- [Telnyx Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/telnyx-voice-vs-voximplant.md)\n- [Twilio Programmable Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/twilio-voice-vs-voximplant.md)\n- [Vonage Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/vonage-voice-vs-voximplant.md)\n",
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    "title": "LiveKit Telephony vs Voximplant for AI agents, B 67.5 vs D 51.7",
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