{ "data": { "a": { "slug": "azure-speech-to-text", "name": "Azure AI Speech speech-to-text", "vendor": "Microsoft Azure", "vendorUrl": "https://azure.microsoft.com/en-us/products/ai-services/speech-to-text", "kind": "model", "category": "speech-to-text", "summary": "Azure's speech-to-text service for transcribing audio.", "url": "https://www.anchorterminal.com/tools/azure-speech-to-text", "markdownUrl": "https://www.anchorterminal.com/tools/azure-speech-to-text.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/azure-speech-to-text.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/azure-speech-to-text.json", "repo": "https://github.com/Azure-Samples/cognitive-services-speech-sdk", "license": "MIT (samples), SDK under Microsoft's own licence", "transports": [ "http" ], "remoteUrl": "https://eastus.api.cognitive.microsoft.com/speechtotext", "packages": [ { "registry": "pypi", "name": "azure-cognitiveservices-speech" }, { "registry": "npm", "name": "microsoft-cognitiveservices-speech-sdk" } ], "auth": "mixed", "authNotes": "`Ocp-Apim-Subscription-Key` header with a Speech resource key, or a Microsoft Entra ID bearer token (Microsoft's recommended keyless option). Endpoints are per region or per resource.", "pricing": "freemium", "pricingNotes": "Free F0 tier with 5 audio hours a month of real-time. Pay as you go in East US is $1 an hour real-time, $0.36 fast transcription, $0.18 batch, $1.20 custom real-time. Diarisation and continuous language ID in real time add $0.30 an hour each. MAI-Transcribe-2 is $0.10 an hour until 2026-12-31. Commitment tiers from $1,600 a month for 2,000 hours (https://azure.microsoft.com/en-us/pricing/details/speech/).", "priceSummary": "Freemium", "where": "hosted", "x402": { "level": "no", "evidence": "No machine payment. Billing runs through a cloud account with a card or invoice.", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 3450, "npmWeekly": 475621, "pypiWeekly": 1032532, "asOf": "2026-09-30" }, "docsUrl": "https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-to-text", "capabilities": [ "speech.stt", "speech.streaming", "speech.batch", "speech.diarisation", "speech.languages", "speech.translation" ], "tags": [ "hosted", "freemium", "free-tier", "closed-source", "python", "typescript", "enterprise", "streaming", "batch", "async-jobs", "webhooks" ], "lastRelease": "2026-09-28", "graded": true, "anchor": { "graded": true, "score": 77, "grade": "BB", "agentReady": true, "rank": 23, "ranked": true, "rankOf": 452, "categoryRank": 1, "methodology": "0.3", "run": "2026-10-01", "scores": { "ergonomics": 75, "maintenance": 80, "payments": 20, "reliability": 90, "schema": 80, "security": 95, "transparency": 88 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Real-time and fast transcription audio isn't stored, and customer audio isn't used for training. MAI-Transcribe-2 is preview with no SLA, and its $0.10 promotional price ends on 2026-12-31.", "strengths": [ "Real-time and fast transcription audio isn't stored, and customer audio isn't used for training", "Fast transcription returns files up to 5 hours and 500 MB in one synchronous call", "Batch at $0.18 an hour, and a free F0 tier with 5 real-time hours a month", "429 guidance with a concrete backoff pattern of 1, 2, 4 and 4 minutes", "Keys or Entra ID tokens with role-based access" ], "weaknesses": [ "MAI-Transcribe-2 is preview with no SLA, and its $0.10 promotional price ends on 2026-12-31", "Real-time diarisation and language ID add $0.30 an hour each", "REST API v3.0 and the v3.2 previews were retired on 2026-03-31, and older samples still target them", "No llms.txt, and the pricing page needs JavaScript", "An Azure subscription needs a card, even for the F0 tier" ], "agentNotes": [ "Use fast transcription (`transcriptions:transcribe`) for files under 5 hours and 500 MB, and batch for bulk jobs", "Pin `api-version=2025-10-15`. v3.0 and the v3.2 previews are retired", "On a 429, back off 1, 2, 4 then 4 minutes. It usually means autoscaling, not a quota", "Set `timeToLive` on batch jobs or delete results, otherwise transcripts stay in Microsoft storage", "Don't budget on MAI-Transcribe-2 at $0.10 an hour after 2026-12-31" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 8, "avgRating": 3.3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.3", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 77 } ], "editorialScores": { "ergonomics": 75, "maintenance": 80, "payments": 20, "reliability": 90, "schema": 80, "security": 95, "transparency": 80 }, "provenanceScore": 95 }, "connect": { "install": "pip install azure-cognitiveservices-speech # or: npm i microsoft-cognitiveservices-speech-sdk", "http": "curl -X POST \"https://$AZURE_SPEECH_RESOURCE.cognitiveservices.azure.com/speechtotext/transcriptions:transcribe?api-version=2025-10-15\" \\\n -H \"Ocp-Apim-Subscription-Key: $AZURE_SPEECH_KEY\" \\\n -F \"audio=@call.wav\" -F 'definition={\"locales\":[\"en-US\"]}'" }, "letme": { "capability": "https://letme.dev/speech.stt", "tool": "https://letme.dev/azure-speech-to-text" }, "sameCompany": [ "azure-foundry-fine-tuning", "azure-ai-content-safety", "azure-text-to-speech", "microsoft-learn-mcp", "playwright-mcp", "azure-mcp", "azure-translator", "microsoft-graph-calendar" ], "area": "voice", "unitPrices": [ { "item": "Real-time standard", "unit": "audio-minute", "usd": 0.0167, "note": "$1 an hour, East US" }, { "item": "Fast transcription", "unit": "audio-minute", "usd": 0.006, "note": "$0.36 an hour" }, { "item": "Batch standard", "unit": "audio-minute", "usd": 0.003, "note": "$0.18 an hour" }, { "item": "MAI-Transcribe-2 (preview)", "unit": "audio-minute", "usd": 0.00167, "note": "$0.10 an hour, promotional until 2026-12-31" }, { "item": "Custom real-time", "unit": "audio-minute", "usd": 0.02, "note": "$1.20 an hour, plus endpoint hosting" }, { "item": "Real-time add-on (diarisation or language ID)", "unit": "audio-minute", "usd": 0.005, "note": "$0.30 an hour per feature" } ], "provenance": { "legalEntity": "Microsoft Corporation", "domain": "microsoft.com", "domainRegistered": "1991-05-02", "domainNote": "Endpoints are on speech.microsoft.com, api.cognitive.microsoft.com and cognitiveservices.azure.com. microsoft.com publishes a security.txt, but it passed its Expires date on 2026-09-23.", "endpointOnVendorDomain": true, "terms": "https://www.microsoft.com/licensing/terms/", "privacy": "https://privacy.microsoft.com/en-us/privacystatement", "statusPage": "https://azure.status.microsoft/en-us/status", "changelog": "https://learn.microsoft.com/en-us/azure/ai-services/speech-service/releasenotes", "securityTxt": "expired", "checked": "2026-09-30", "score": 95 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/azure-speech-to-text.json", "live": { "slug": "azure-speech-to-text", "probe": { "target": "https://eastus.api.cognitive.microsoft.com/speechtotext", "method": "get", "lastAt": "2026-10-04T23:48:04.612036064Z", "lastOk": true, "lastStatus": 404, "lastMs": 329, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 332, "p95ms24h": 391, "samples24h": 272, "samples30d": 1100, "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": 270, "ok": 270 } ] }, "vendorStatus": { "page": "https://azure.status.microsoft/en-us/status", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-04T21:39:49.706276597Z" }, "versions": [ { "registry": "github", "name": "Azure-Samples/cognitive-services-speech-sdk", "version": "ingestion-v2.1.13", "released": "2026-07-10", "seenAt": "2026-10-04T16:21:35.861804644Z" }, { "registry": "npm", "name": "microsoft-cognitiveservices-speech-sdk", "version": "1.52.0", "seenAt": "2026-10-04T16:21:35.450134716Z" }, { "registry": "pypi", "name": "azure-cognitiveservices-speech", "version": "1.52.0", "released": "2026-09-28", "seenAt": "2026-10-04T16:21:35.259257344Z" } ], "githubStars": 3450, "npmWeekly": 508156, "pypiWeekly": 762825, "securityTxt": { "url": "https://microsoft.com/.well-known/security.txt", "state": "expired", "expires": "2026-09-23T16:00:00.000Z", "checkedAt": "2026-10-04T15:16:01.36832038Z" }, "domain": { "domain": "microsoft.com", "registered": "1991-05-02", "source": "https://rdap.verisign.com/com/v1/domain/microsoft.com", "checkedAt": "2026-10-04T13:04:13.488857536Z" }, "pages": [ { "url": "https://learn.microsoft.com/en-us/azure/ai-services/speech-service/releasenotes", "kind": "changelog", "status": 304, "checkedAt": "2026-10-04T15:45:30.876444067Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "2950544cc00c" }, { "url": "https://learn.microsoft.com/en-us/azure/ai-services/speech-service/mai-transcribe", "kind": "deprecations", "status": 304, "checkedAt": "2026-10-04T15:45:28.887604282Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "ebf9086dffd9" }, { "url": "https://learn.microsoft.com/en-us/azure/ai-services/speech-service/rest-speech-to-text", "kind": "deprecations", "status": 304, "checkedAt": "2026-10-04T15:45:32.859554147Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "fd2ed8814ecb" }, { "url": "https://azure.microsoft.com/en-us/pricing/details/speech/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-04T15:41:26.501161098Z", "changedAt": "2026-10-02T15:17:47.510097164Z", "fingerprint": "61d50da4e330" }, { "url": "https://privacy.microsoft.com/en-us/privacystatement", "kind": "privacy", "status": 200, "checkedAt": "2026-10-01T13:14:57.860748137Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "07484a06f35c" }, { "url": "https://www.microsoft.com/licensing/terms/", "kind": "terms", "status": 502, "checkedAt": "2026-10-01T13:17:52.720054167Z", "changedAt": "0001-01-01T00:00:00Z" } ], "updatedAt": "2026-10-04T23:48:04.612036064Z" } }, "b": { "slug": "deepgram-stt", "name": "Deepgram Speech-to-Text (Nova-3, Flux)", "vendor": "Deepgram", "vendorUrl": "https://deepgram.com", "kind": "model", "category": "speech-to-text", "summary": "Deepgram's speech-to-text API for recorded audio and live streams, including turn detection for voice agents.", "url": "https://www.anchorterminal.com/tools/deepgram-stt", "markdownUrl": "https://www.anchorterminal.com/tools/deepgram-stt.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/deepgram-stt.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/deepgram-stt.json", "repo": "https://github.com/deepgram/deepgram-python-sdk", "license": "MIT (SDKs)", "transports": [ "http", "streamable-http", "stdio", "sse" ], "remoteUrl": "https://api.deepgram.com/v1", "packages": [ { "registry": "npm", "name": "@deepgram/sdk" }, { "registry": "pypi", "name": "deepgram-sdk" }, { "registry": "pypi", "name": "deepctl" } ], "auth": "api-key", "authNotes": "`Authorization: Token \u003ckey\u003e` header on REST and WebSocket calls. Short-lived JWTs (30-second TTL) from the token endpoint for browsers. The `dg` CLI MCP server uses `dg login` credentials or `DEEPGRAM_API_KEY`. The docs MCP needs no key.", "pricing": "usage", "pricingNotes": "$200 free credit with no card, then pay as you go, or Growth from $4,000 a year prepaid for up to 20 per cent off. Nova-3 pre-recorded $0.0043 a minute (multilingual $0.0052). Streaming Nova-3 is on a promotional $0.0048 a minute (regular $0.0077), multilingual $0.0058 (regular $0.0092). Flux English $0.0065 promotional (regular $0.0077), Flux Multilingual $0.0078. Streaming diarisation adds $0.0020 a minute, redaction $0.0020 and keyterm prompting $0.0013 (https://deepgram.com/pricing).", "priceSummary": "Pay per use", "where": "both", "x402": { "level": "no", "evidence": "No x402 or machine payment in the docs or pricing. Card or prepaid credits only (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 468, "npmWeekly": 1123798, "pypiWeekly": 805026, "asOf": "2026-09-30" }, "docsUrl": "https://developers.deepgram.com/docs/models-languages-overview", "llmsTxt": "https://developers.deepgram.com/llms.txt", "openapi": "https://developers.deepgram.com/openapi.json", "capabilities": [ "speech.stt", "speech.streaming", "speech.batch", "speech.diarisation", "speech.languages" ], "tags": [ "hosted", "no-card", "closed-source", "python", "typescript", "openapi", "llms-txt", "mcp", "streaming", "batch", "webhooks", "enterprise", "self-hosted" ], "lastRelease": "2026-09-29", "graded": true, "anchor": { "graded": true, "score": 70.6, "grade": "BB", "agentReady": true, "rank": 94, "ranked": true, "rankOf": 452, "categoryRank": 3, "methodology": "0.3", "run": "2026-10-01", "scores": { "ergonomics": 75, "maintenance": 80, "payments": 40, "reliability": 65, "schema": 95, "security": 65, "transparency": 75 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Flux streams with model-level end-of-turn detection, so a voice agent needs no separate VAD. Training on audio is the default and the opt-out is a per-request flag.", "strengths": [ "Flux streams with model-level end-of-turn detection, so a voice agent needs no separate VAD", "Nova-3 pre-recorded at $0.0043 a minute with diarisation included", "OpenAPI and AsyncAPI files, an llms.txt and SDKs in six languages", "Keys can carry a role and an expiry date", "$200 free credit with no card" ], "weaknesses": [ "Training on audio is the default and the opt-out is a per-request flag", "Two incidents over 2 hours in July 2026, on Flux streaming and batch", "No SLA published for self-serve plans", "The privacy policy dates from October 2021 and doesn't mention the Model Improvement Program", "Streaming prices are promotional and may rise to the regular rate" ], "agentNotes": [ "Add `mip_opt_out=true` to every request that carries customer audio", "Use Flux (`flux-general-en`) on `/v2/listen` for live agents and Nova-3 for files", "Back off exponentially on 429. The concurrency limit is per project", "Pass `callback` for long files so the request doesn't hit the 10-minute processing timeout", "Mint keys with an expiry for short-lived jobs" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.3", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 70.6 } ], "editorialScores": { "ergonomics": 75, "maintenance": 80, "payments": 40, "reliability": 65, "schema": 95, "security": 65, "transparency": 60 }, "provenanceScore": 90 }, "connect": { "http": "curl -X POST \"https://api.deepgram.com/v1/listen?model=nova-3\u0026smart_format=true\u0026diarize=true\" \\\n -H \"Authorization: Token $DEEPGRAM_API_KEY\" -H \"content-type: application/json\" \\\n -d '{\"url\":\"https://dpgr.am/spacewalk.wav\"}'", "claudeCode": "claude mcp add deepgram-docs --transport http https://api.dx.deepgram.com/kapa/mcp", "config": { "mcpServers": { "deepgram": { "args": [ "mcp" ], "command": "dg", "env": { "DEEPGRAM_API_KEY": "${DEEPGRAM_API_KEY}" } } } } }, "letme": { "capability": "https://letme.dev/speech.stt", "tool": "https://letme.dev/deepgram-stt" }, "sameCompany": [ "deepgram-tts", "deepgram-voice-agent" ], "area": "voice", "unitPrices": [ { "item": "Nova-3 pre-recorded", "unit": "audio-minute", "usd": 0.0043, "note": "pay as you go, diarisation included" }, { "item": "Nova-3 Multilingual pre-recorded", "unit": "audio-minute", "usd": 0.0052 }, { "item": "Nova-3 streaming", "unit": "audio-minute", "usd": 0.0048, "note": "promotional, regular $0.0077" }, { "item": "Nova-3 Multilingual streaming", "unit": "audio-minute", "usd": 0.0058, "note": "promotional, regular $0.0092" }, { "item": "Flux English streaming", "unit": "audio-minute", "usd": 0.0065, "note": "promotional, regular $0.0077" }, { "item": "Flux Multilingual streaming", "unit": "audio-minute", "usd": 0.0078 }, { "item": "Streaming diarisation add-on", "unit": "audio-minute", "usd": 0.002 } ], "provenance": { "legalEntity": "Deepgram, Inc.", "domain": "deepgram.com", "domainRegistered": "2016-01-28", "endpointOnVendorDomain": true, "terms": "https://deepgram.com/terms", "privacy": "https://deepgram.com/privacy", "statusPage": "https://status.deepgram.com", "changelog": "https://developers.deepgram.com/changelog", "securityTxt": "none", "checked": "2026-09-30", "score": 90 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/deepgram-stt.json", "live": { "slug": "deepgram-stt", "probe": { "target": "https://api.deepgram.com/v1", "method": "get", "lastAt": "2026-10-04T23:48:07.204131968Z", "lastOk": true, "lastStatus": 404, "lastMs": 332, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 409, "p95ms24h": 574, "samples24h": 272, "samples30d": 1100, "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": 270, "ok": 270 } ] }, "vendorStatus": { "page": "https://status.deepgram.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-04T23:49:10.230014277Z" }, "versions": [ { "registry": "github", "name": "deepgram/deepgram-python-sdk", "version": "v7.12.0", "released": "2026-10-02", "seenAt": "2026-10-04T16:25:14.377162819Z" }, { "registry": "npm", "name": "@deepgram/sdk", "version": "5.14.0", "seenAt": "2026-10-04T16:25:11.388177933Z" }, { "registry": "pypi", "name": "deepctl", "version": "0.3.1", "released": "2026-09-29", "seenAt": "2026-10-04T16:25:12.495057478Z" }, { "registry": "pypi", "name": "deepgram-sdk", "version": "7.12.0", "released": "2026-10-02", "seenAt": "2026-10-04T16:25:12.291142743Z" } ], "githubStars": 468, "npmWeekly": 1147181, "pypiWeekly": 806541, "securityTxt": { "url": "https://deepgram.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-04T15:16:00.338324598Z" }, "llmsTxt": { "url": "https://developers.deepgram.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-04T15:17:29.891823062Z" }, "domain": { "domain": "deepgram.com", "registered": "2016-01-28", "source": "https://rdap.verisign.com/com/v1/domain/deepgram.com", "checkedAt": "2026-10-04T13:03:28.939824686Z" }, "pages": [ { "url": "https://developers.deepgram.com/changelog", "kind": "changelog", "status": 304, "checkedAt": "2026-10-04T15:42:47.246047138Z", "changedAt": "2026-10-03T15:30:58.169955011Z", "fingerprint": "906a55c83273" }, { "url": "https://deepgram.com/pricing", "kind": "pricing", "status": 304, "checkedAt": "2026-10-04T15:42:22.716687514Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "9dc1aeac38eb" }, { "url": "https://deepgram.com/privacy", "kind": "privacy", "status": 304, "checkedAt": "2026-10-04T15:42:24.872646912Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "89846510fbe6" }, { "url": "https://deepgram.com/terms", "kind": "terms", "status": 304, "checkedAt": "2026-10-04T15:42:26.768797703Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "7042d107fca1" } ], "updatedAt": "2026-10-04T23:49:10.230014277Z" } }, "summary": "Azure AI Speech speech-to-text has a score of 77 (BB) against Deepgram Speech-to-Text (Nova-3, Flux)'s 70.6 (BB). Both do speech stt. The largest gap is security \u0026 auth, 30 points." }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-deepgram-stt", "json": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-deepgram-stt.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-deepgram-stt.md", "slim": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-deepgram-stt.min.md" }, "markdown": "Azure AI Speech speech-to-text has a score of 77 (BB) against Deepgram Speech-to-Text (Nova-3, Flux)'s 70.6 (BB). Both do speech stt. The largest gap is security \u0026 auth, 30 points.\n\n- Azure AI Speech speech-to-text: grade BB, 77/100, rank #23 of 452. Markdown https://www.anchorterminal.com/tools/azure-speech-to-text.md · JSON https://www.anchorterminal.com/api/v1/tools/azure-speech-to-text.json\n- Deepgram Speech-to-Text (Nova-3, Flux): grade BB, 70.6/100, rank #94 of 452. Markdown https://www.anchorterminal.com/tools/deepgram-stt.md · JSON https://www.anchorterminal.com/api/v1/tools/deepgram-stt.json\n\n## Which one, for what\n\nPick Azure AI Speech speech-to-text for reliability (+25), security \u0026 auth (+30), transparency \u0026 trust (+13).\n\nPick Deepgram Speech-to-Text (Nova-3, Flux) for schema \u0026 documentation (+15), payments \u0026 pricing (+20).\n\n## Score by category\n\n| Category | Weight | Azure AI Speech speech-to-text | Deepgram Speech-to-Text (Nova-3, Flux) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 90 | 65 | Azure AI Speech speech-to-text +25 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 80 | 95 | Deepgram Speech-to-Text (Nova-3, Flux) +15 |\n| Agent ergonomics | 13% (16.2 this run) | 75 | 75 | even |\n| Security \u0026 auth | 14% (17.5 this run) | 95 | 65 | Azure AI Speech speech-to-text +30 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 40 | Deepgram Speech-to-Text (Nova-3, Flux) +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 80 | 80 | even |\n| Transparency \u0026 trust | 7% (8.8 this run) | 88 | 75 | Azure AI Speech speech-to-text +13 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **77 · BB** | **70.6 · BB** | |\n\n## Facts side by side\n\n| Fact | Azure AI Speech speech-to-text | Deepgram Speech-to-Text (Nova-3, Flux) |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Microsoft Azure | Deepgram |\n| Hosted endpoint | `https://eastus.api.cognitive.microsoft.com/speechtotext` | `https://api.deepgram.com/v1` |\n| Transports | HTTP | HTTP, Streamable HTTP, stdio, SSE (legacy) |\n| Auth | OAuth or key | API key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | MIT (samples), SDK under Microsoft's own licence | MIT (SDKs) |\n| Tools exposed | none | none |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | no | yes |\n| MCP registry | not listed | not listed |\n| Last release | 2026-09-28 | 2026-09-29 |\n| Popularity | 3.5k stars, 476k npm/wk, 1M PyPI/wk | 468 stars, 1.1M npm/wk, 805k PyPI/wk |\n| Agent reviews | 3.3/5 (8) | 3.5/5 (2) |\n\n## Verdicts\n\n**Azure AI Speech speech-to-text.** Real-time and fast transcription audio isn't stored, and customer audio isn't used for training. MAI-Transcribe-2 is preview with no SLA, and its $0.10 promotional price ends on 2026-12-31.\n\n**Deepgram Speech-to-Text (Nova-3, Flux).** Flux streams with model-level end-of-turn detection, so a voice agent needs no separate VAD. Training on audio is the default and the opt-out is a per-request flag.\n\n## Before you call either\n\n### Azure AI Speech speech-to-text\n\n1. Use fast transcription (`transcriptions:transcribe`) for files under 5 hours and 500 MB, and batch for bulk jobs\n2. Pin `api-version=2025-10-15`. v3.0 and the v3.2 previews are retired\n3. On a 429, back off 1, 2, 4 then 4 minutes. It usually means autoscaling, not a quota\n4. Set `timeToLive` on batch jobs or delete results, otherwise transcripts stay in Microsoft storage\n5. Don't budget on MAI-Transcribe-2 at $0.10 an hour after 2026-12-31\n\n### Deepgram Speech-to-Text (Nova-3, Flux)\n\n1. Add `mip_opt_out=true` to every request that carries customer audio\n2. Use Flux (`flux-general-en`) on `/v2/listen` for live agents and Nova-3 for files\n3. Back off exponentially on 429. The concurrency limit is per project\n4. Pass `callback` for long files so the request doesn't hit the 10-minute processing timeout\n5. Mint keys with an expiry for short-lived jobs\n\n## Other comparisons with Azure AI Speech speech-to-text or Deepgram Speech-to-Text (Nova-3, Flux)\n\n- [Amazon Transcribe vs Azure AI Speech speech-to-text](https://www.anchorterminal.com/compare/amazon-transcribe-vs-azure-speech-to-text.md)\n- [Amazon Transcribe vs Deepgram Speech-to-Text (Nova-3, Flux)](https://www.anchorterminal.com/compare/amazon-transcribe-vs-deepgram-stt.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Azure AI Speech speech-to-text](https://www.anchorterminal.com/compare/assemblyai-stt-vs-azure-speech-to-text.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Deepgram Speech-to-Text (Nova-3, Flux)](https://www.anchorterminal.com/compare/assemblyai-stt-vs-deepgram-stt.md)\n- [Azure AI Speech speech-to-text vs ElevenLabs Scribe Speech to Text API](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-elevenlabs-scribe.md)\n- [Azure AI Speech speech-to-text vs Gladia Speech-to-Text API + MCP](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-gladia-stt.md)\n- [Azure AI Speech speech-to-text vs Google Cloud Speech-to-Text](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-google-speech-to-text.md)\n- [Azure AI Speech speech-to-text vs Rev AI Speech-to-Text API](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-rev-ai-stt.md)\n- [Azure AI Speech speech-to-text vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-soniox-stt.md)\n- [Azure AI Speech speech-to-text vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-speechmatics-stt.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs ElevenLabs Scribe Speech to Text API](https://www.anchorterminal.com/compare/deepgram-stt-vs-elevenlabs-scribe.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs Gladia Speech-to-Text API + MCP](https://www.anchorterminal.com/compare/deepgram-stt-vs-gladia-stt.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs Google Cloud Speech-to-Text](https://www.anchorterminal.com/compare/deepgram-stt-vs-google-speech-to-text.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs Rev AI Speech-to-Text API](https://www.anchorterminal.com/compare/deepgram-stt-vs-rev-ai-stt.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/deepgram-stt-vs-soniox-stt.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/deepgram-stt-vs-speechmatics-stt.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-04", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.3", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Azure AI Speech speech-to-text vs Deepgram Speech-to-Text (Nova-3, Flux)", "url": "" } ], "description": "Azure AI Speech speech-to-text has a score of 77 (BB) against Deepgram Speech-to-Text (Nova-3, Flux)'s 70.6 (BB). Both do speech stt. The largest gap is security \u0026 auth, 30 points. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Azure AI Speech speech-to-text BB 77", "Deepgram Speech-to-Text (Nova-3, Flux) BB 70.6", "scores" ], "h1": "Azure AI Speech speech-to-text vs Deepgram Speech-to-Text (Nova-3, Flux)", "image": "https://www.anchorterminal.com/assets/og/compare-azure-speech-to-text-vs-deepgram-stt.png", "path": "/compare/azure-speech-to-text-vs-deepgram-stt", "published": "2026-10-01", "section": "tools", "title": "Azure AI Speech speech-to-text vs Deepgram Speech-to-Text (Nova-3…", "toc": null, "updated": "2026-10-04", "url": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-deepgram-stt" }, "tokens": { "markdown": 1850, "slim": 380 }, "version": 1 }