{ "data": { "a": { "slug": "azure-text-to-speech", "name": "Azure AI Speech text-to-speech", "vendor": "Microsoft Azure", "vendorUrl": "https://azure.microsoft.com/en-us/products/ai-services/text-to-speech", "kind": "model", "category": "text-to-speech", "summary": "Azure's text-to-speech service for generating spoken audio.", "url": "https://www.anchorterminal.com/tools/azure-text-to-speech", "markdownUrl": "https://www.anchorterminal.com/tools/azure-text-to-speech.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/azure-text-to-speech.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/azure-text-to-speech.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.tts.speech.microsoft.com/cognitiveservices", "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. Endpoints are per region.", "pricing": "freemium", "pricingNotes": "Free F0 tier with 500,000 characters a month. Pay as you go in East US is $15 per 1M characters for Neural and Neural HD Flash voices and $22 for Neural HD, real time or batch. Commitment tiers from $960 a month for 80M characters (https://azure.microsoft.com/en-us/pricing/details/speech/). Microsoft AI lists MAI-Voice-2.1 at $22 and MAI-Voice-2.1-Flash at $15 per 1M characters in preview (https://microsoft.ai/models/mai-voice-2-1/).", "priceSummary": "$960 / mo", "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/text-to-speech", "capabilities": [ "speech.tts", "speech.streaming", "speech.voices", "speech.ssml", "speech.languages" ], "tags": [ "hosted", "freemium", "free-tier", "closed-source", "python", "typescript", "enterprise", "streaming", "batch", "async-jobs" ], "lastRelease": "2026-10-01", "graded": true, "anchor": { "graded": true, "score": 71.4, "grade": "BB", "agentReady": true, "rank": 121, "ranked": true, "rankOf": 842, "categoryRank": 4, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 75, "maintenance": 80, "payments": 20, "reliability": 80, "schema": 65, "security": 90, "transparency": 85 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-05" }, "negative": 0, "verdict": "Real-time synthesis keeps neither the input text nor the output audio. An Azure subscription needs a card, even for the free F0 tier.", "bestFor": "Operators on Azure who need SSML control, many languages and voices, and enterprise access control.", "strengths": [ "Real-time synthesis keeps neither the input text nor the output audio", "Full SSML with speaking styles, prosody, phonemes, lexicons and up to 50 voice or audio tags a request", "Microsoft Entra ID with role-based access, or two rotatable keys", "Covered by Microsoft's online services SLA", "S0 starts at 30 requests a second and can be raised to 1,000" ], "weaknesses": [ "An Azure subscription needs a card, even for the free F0 tier", "No llms.txt and no OpenAPI file for text-to-speech found", "429s often reflect busy capacity for a voice in a region, which a quota increase doesn't fix", "The voice list comes back as one response per region with no paging documented", "MAI-Voice-2.1 and MAI-Voice-2.1-Flash, Microsoft's newest models, are public preview with no SLA" ], "agentNotes": [ "Send SSML with `\u003cspeak\u003e` and `\u003cvoice\u003e`, and set `X-Microsoft-OutputFormat` and `User-Agent`.", "On 429 retry with backoff, and try the voice's home region or another region rather than asking for more quota.", "Keep each real-time request under 10 minutes of audio, or use batch synthesis.", "Use Entra ID tokens instead of resource keys where the agent runs inside Azure.", "Name a MAI voice with its model suffix, such as `en-US-Harper:MAI-Voice-2.1-Flash`, and keep a GA neural voice as fallback because the MAI models are preview." ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 71.4 } ], "editorialScores": { "ergonomics": 75, "maintenance": 80, "payments": 20, "reliability": 80, "schema": 65, "security": 90, "transparency": 80 }, "provenanceScore": 90 }, "connect": { "install": "pip install azure-cognitiveservices-speech # or: npm i microsoft-cognitiveservices-speech-sdk", "http": "curl -X POST \"https://eastus.tts.speech.microsoft.com/cognitiveservices/v1\" \\\n -H \"Ocp-Apim-Subscription-Key: $AZURE_SPEECH_KEY\" -H \"Content-Type: application/ssml+xml\" \\\n -H \"X-Microsoft-OutputFormat: audio-24khz-48kbitrate-mono-mp3\" -o speech.mp3 \\\n -d '\u003cspeak version=\"1.0\" xml:lang=\"en-US\"\u003e\u003cvoice name=\"en-US-AvaMultilingualNeural\"\u003eYour table is booked for seven.\u003c/voice\u003e\u003c/speak\u003e'" }, "letme": { "capability": "https://letme.dev/speech.tts", "tool": "https://letme.dev/azure-text-to-speech" }, "sameCompany": [ "azure-foundry-fine-tuning", "azure-ai-content-safety", "azure-speech-to-text", "microsoft-agent-framework", "microsoft-execution-containers", "microsoft-entra-agent-id", "azure-key-vault", "azure-document-intelligence", "azure-devops-mcp", "microsoft-learn-mcp", "playwright-mcp", "azure-mcp", "azure-maps", "azure-translator", "microsoft-graph-calendar", "azure-blob-storage", "onedrive-sharepoint", "microsoft-teams", "dynamics-365-sales", "power-automate", "foundry-local", "microsoft-advertising-api", "microsoft-excel-graph", "outlook-mail-graph" ], "area": "voice", "unitPrices": [ { "item": "Neural and Neural HD Flash voices", "unit": "1m-chars", "usd": 15, "note": "real time or batch, East US" }, { "item": "Neural HD voices", "unit": "1m-chars", "usd": 22 }, { "item": "Commitment tier 80M characters", "unit": "month", "usd": 960, "note": "$12 per 1M overage" } ], "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": 90 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/azure-text-to-speech.json", "live": { "slug": "azure-text-to-speech", "probe": { "target": "https://eastus.tts.speech.microsoft.com/cognitiveservices", "method": "get", "lastAt": "2026-10-09T11:00:17.084587198Z", "lastOk": true, "lastStatus": 404, "lastMs": 269, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 259, "p95ms24h": 288, "samples24h": 260, "samples30d": 2303, "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": 117, "ok": 117 } ] }, "versions": [ { "registry": "github", "name": "Azure-Samples/cognitive-services-speech-sdk", "version": "ingestion-v2.1.13", "released": "2026-07-10", "seenAt": "2026-10-08T16:01:22.562366486Z" }, { "registry": "npm", "name": "microsoft-cognitiveservices-speech-sdk", "version": "1.52.0", "seenAt": "2026-10-08T16:01:20.630008196Z" }, { "registry": "pypi", "name": "azure-cognitiveservices-speech", "version": "1.52.0", "released": "2026-09-28", "seenAt": "2026-10-08T16:01:17.540931942Z" } ], "githubStars": 3450, "npmWeekly": 515908, "pypiWeekly": 545092, "securityTxt": { "url": "https://microsoft.com/.well-known/security.txt", "state": "expired", "expires": "2026-09-23T16:00:00.000Z", "checkedAt": "2026-10-08T15:39:08.216544687Z" }, "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" }, "updatedAt": "2026-10-09T11:00:17.084587198Z" } }, "answer": "Azure AI Speech text-to-speech scores 71.4 (BB) on agent readiness against Fish Audio TTS API's 60.7 (C), and leads in 5 of 7 scored categories. Fish Audio TTS API leads on schema \u0026 documentation and payments \u0026 pricing.", "b": { "slug": "fish-audio-tts", "name": "Fish Audio TTS API", "vendor": "Fish Audio", "vendorUrl": "https://fish.audio", "kind": "model", "category": "text-to-speech", "summary": "Fish Audio's API turns text into speech with the `s2.1-pro` model in 83 languages, over a REST endpoint, a timestamped stream and a WebSocket that accepts text as it is produced.", "url": "https://www.anchorterminal.com/tools/fish-audio-tts", "markdownUrl": "https://www.anchorterminal.com/tools/fish-audio-tts.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/fish-audio-tts.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/fish-audio-tts.json", "repo": "https://github.com/fishaudio/fish-audio-python", "license": "Apache-2.0 (Python SDK), MIT (JavaScript SDK)", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.fish.audio", "packages": [ { "registry": "pypi", "name": "fish-audio-sdk" }, { "registry": "npm", "name": "fish-audio" } ], "auth": "mixed", "authNotes": "`Authorization: Bearer` API key created in the web app after a browser signup with email verification. A key takes a name and an optional expiry. The `model` request header selects the model. The hosted MCP server at `https://api.fish.audio/mcp` signs in by OAuth and is bound to one team (https://docs.fish.audio/developer-guide/getting-started/api-key, https://docs.fish.audio/overview/mcp).", "pricing": "usage", "pricingNotes": "$15 per million UTF-8 bytes of input text on `s2.1-pro`, `s2-pro` and `s1`, prepaid with no subscription or monthly minimum. `s2.1-pro-free` costs $0 under fair-use limits, and the changelog says it is free through 30 November 2026. An agent can start on the free model once a person has signed up. Whether a card is needed is not stated. Concurrency rises with total prepaid amount. MCP usage draws on web app plan credits, not API credits (https://docs.fish.audio/developer-guide/models-pricing/pricing-and-rate-limits).", "priceSummary": "Pay per use", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the developer docs, the OpenAPI file or the pricing page (checked 2026-10-09).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": 5213, "pypiWeekly": 34220, "asOf": "2026-10-09" }, "docsUrl": "https://docs.fish.audio/features/text-to-speech", "llmsTxt": "https://docs.fish.audio/llms.txt", "openapi": "https://docs.fish.audio/api-reference/openapi.json", "capabilities": [ "speech.tts", "speech.streaming", "speech.voices", "speech.languages", "voice.clone" ], "tags": [ "hosted", "usage-priced", "prepaid", "free-tier", "closed-source", "python", "typescript", "openapi", "llms-txt", "mcp", "streaming", "status-page", "open-weights" ], "lastRelease": "2026-09-23", "graded": true, "anchor": { "graded": true, "score": 60.7, "grade": "C", "agentReady": false, "rank": 453, "ranked": true, "rankOf": 842, "categoryRank": 8, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 69, "payments": 30, "reliability": 75, "schema": 84, "security": 35, "transparency": 60 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": 0, "verdict": "The API accepts streamed text over a WebSocket, returns word timestamps, and prices speech at $15 per million UTF-8 bytes with a $0 model for development. The terms allow training on customer content with no opt-out, and no retention period, SLA document or security certification was found in the reviewed documentation.", "bestFor": "Voice agents that stream LLM text into speech at a low per-byte price, multilingual output from one model, and teams moving from OpenAI or ElevenLabs request shapes.", "strengths": [ "Public OpenAPI 3.1 file, llms.txt, Markdown pages and two installable agent skills for the SDKs and the raw API", "WebSocket input takes text as it is produced, with `flush` and `stop` events and a variant that returns word timestamps", "`s2.1-pro-free` runs the production model at $0 under fair-use limits, through 30 November 2026", "OpenAI-compatible and ElevenLabs-compatible endpoints refuse unsupported options with a 4xx and send `Retry-After` on a 429", "S1 retirement was announced on 8 October 2026 for 31 December 2026, with a migration guide" ], "weaknesses": [ "The terms allow Usage Data and Content to train models, with no opt-out found", "An unrecognised `model` header falls back to paid `s2.1-pro` without an error", "The Text-to-Speech API status component shows downtime on 11 days in 90, the longest 58 minutes on 6 August 2026, mostly on the free model", "The published SDKs date from March 2026. `fish-audio` 0.1.0 on npm defaults to the deprecated `s1`", "No security.txt, certification, DPA text or sub-processor list found in the pages read" ], "agentNotes": [ "Send the `model` header on every request and check its spelling. A missing or unknown value is served and billed as `s2.1-pro`.", "Budget by UTF-8 bytes, not characters. Chinese, Japanese and Korean text costs about three bytes a character.", "Retry 429 and 5xx with exponential backoff. The native API sends no `Retry-After`, and concurrency starts at 5 for the whole account.", "Use `[bracket]` cues on the S2 family. `(parenthesis)` tags from `s1` are read aloud as text.", "Pass the model explicitly in the JavaScript SDK, because npm release 0.1.0 defaults to `s1`." ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 60.7 } ], "editorialScores": { "ergonomics": 67, "maintenance": 69, "payments": 30, "reliability": 75, "schema": 84, "security": 35, "transparency": 44 }, "provenanceScore": 75 }, "connect": { "install": "pip install fish-audio-sdk", "http": "curl --request POST https://api.fish.audio/v1/tts \\\n --header \"Authorization: Bearer $FISH_API_KEY\" \\\n --header \"Content-Type: application/json\" \\\n --header \"model: s2.1-pro-free\" \\\n --data '{ \"text\": \"Hello from Fish Audio!\", \"format\": \"mp3\" }' \\\n --output hello.mp3", "claudeCode": "claude mcp add --transport http fish-audio https://api.fish.audio/mcp", "config": { "mcpServers": { "fish-audio": { "url": "https://api.fish.audio/mcp" } } } }, "letme": { "capability": "https://letme.dev/speech.tts", "tool": "https://letme.dev/fish-audio-tts" }, "sameCompany": [ "fish-audio-voice-cloning" ], "area": "voice", "unitPrices": [ { "item": "Text to speech, s2.1-pro", "unit": "1m-chars", "usd": 15, "note": "per million UTF-8 bytes of input text, not characters" }, { "item": "Text to speech, s2.1-pro-free", "unit": "1m-chars", "usd": 0, "note": "fair-use limits, free through 30 November 2026 per the changelog" } ], "provenance": { "legalEntity": "Hanabi AI Inc.", "domain": "fish.audio", "domainRegistered": "2023-12-11", "endpointOnVendorDomain": true, "terms": "https://fish.audio/terms/", "privacy": "https://fish.audio/privacy/", "statusPage": "https://status.fish.audio", "changelog": "https://docs.fish.audio/developer-guide/getting-started/changelog", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "The Terms of Use (effective 18 August 2024) name Hanabi AI Inc., a Delaware corporation at 1111B S Governors Ave STE 48109, Dover, DE 19904, as the provider of the Services, and cover API keys.", "The Privacy Policy is dated 28 August 2024.", "https://fish.audio/.well-known/security.txt returned 404 on 2026-10-09.", "RDAP for fish.audio gives a registration date of 2023-12-11.", "The terms forbid crawling or scraping any page of the Services by manual or automated means. robots.txt on fish.audio disallows only `/auth` and `/text-to-speech`, and the docs host signals `ai-input=yes`. We read the terms, the privacy policy and the docs host, and no other fish.audio page." ], "score": 75 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/fish-audio-tts.json", "live": { "slug": "fish-audio-tts", "probe": { "target": "https://api.fish.audio", "method": "get", "lastAt": "2026-10-09T11:00:23.883750204Z", "lastOk": true, "lastStatus": 404, "lastMs": 162, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 158, "p95ms24h": 224, "samples24h": 36, "samples30d": 36, "days": [ { "date": "2026-10-09", "probes": 36, "ok": 36 } ] }, "vendorStatus": { "page": "https://status.fish.audio", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-09T07:57:55.361055093Z" }, "updatedAt": "2026-10-09T11:00:23.883750204Z" } }, "facts": [ { "a": "Model API", "b": "Model API", "name": "Kind" }, { "a": "Microsoft Azure", "b": "Fish Audio", "name": "Vendor" }, { "a": "https://eastus.tts.speech.microsoft.com/cognitiveservices", "b": "https://api.fish.audio", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT (samples), SDK under Microsoft's own licence", "b": "Apache-2.0 (Python SDK), MIT (JavaScript SDK)", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-01", "b": "2026-09-23", "name": "Last release" }, { "a": "couldn't be read", "b": "2024-08-18", "name": "Terms last updated" }, { "a": "2026-09-01", "b": "2024-08-28", "name": "Privacy policy last updated" }, { "a": "yes", "b": "yes", "name": "Customer content may train models" }, { "a": "couldn't be read", "b": "yes", "name": "Terms restrict automated access" }, { "a": "couldn't be read", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "couldn't be read", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "3.5k stars, 476k npm/wk, 1M PyPI/wk", "b": "5.2k npm/wk, 34k PyPI/wk", "name": "Popularity" }, { "a": "3.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Azure AI Speech text-to-speech scores 71.4 (BB) on agent readiness against Fish Audio TTS API's 60.7 (C), and leads in 5 of 7 scored categories. Fish Audio TTS API leads on schema \u0026 documentation and payments \u0026 pricing.", "question": "Which is better for AI agents, Azure AI Speech text-to-speech or Fish Audio TTS API?" }, { "answer": "Both take an API key or an OAuth sign-in.", "question": "Do Azure AI Speech text-to-speech and Fish Audio TTS API need an API key?" }, { "answer": "Yes. Azure AI Speech text-to-speech has a hosted endpoint at https://eastus.tts.speech.microsoft.com/cognitiveservices and Fish Audio TTS API at https://api.fish.audio.", "question": "Can an agent call Azure AI Speech text-to-speech and Fish Audio TTS API without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 80 against 75", "Agent ergonomics, 75 against 67", "Security \u0026 auth, 90 against 35", "Maintenance \u0026 community, 80 against 69", "Transparency \u0026 trust, 85 against 60" ], "also": [ "Agent-ready, a grade of BB or better" ], "goodFor": "Operators on Azure who need SSML control, many languages and voices, and enterprise access control.", "slug": "azure-text-to-speech", "watchFor": "An Azure subscription needs a card, even for the free F0 tier" }, { "aheadOn": [ "Schema \u0026 documentation, 84 against 65", "Payments \u0026 pricing, 30 against 20" ], "also": null, "goodFor": "Voice agents that stream LLM text into speech at a low per-byte price, multilingual output from one model, and teams moving from OpenAI or ElevenLabs request shapes.", "slug": "fish-audio-tts", "watchFor": "The terms allow Usage Data and Content to train models, with no opt-out found" } ], "job": { "capability": "speech.tts", "name": "Speech tts" }, "others": [ { "json": "https://www.anchorterminal.com/compare/amazon-polly-vs-azure-text-to-speech.json", "title": "Amazon Polly vs Azure AI Speech text-to-speech", "url": "https://www.anchorterminal.com/compare/amazon-polly-vs-azure-text-to-speech" }, { "json": "https://www.anchorterminal.com/compare/amazon-polly-vs-fish-audio-tts.json", "title": "Amazon Polly vs Fish Audio TTS API", "url": "https://www.anchorterminal.com/compare/amazon-polly-vs-fish-audio-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-cartesia-tts.json", "title": "Azure AI Speech text-to-speech vs Cartesia Sonic TTS API + MCP", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-cartesia-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-deepgram-tts.json", "title": "Azure AI Speech text-to-speech vs Deepgram Text-to-Speech (Aura-2, Flux TTS)", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-deepgram-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-elevenlabs-tts.json", "title": "Azure AI Speech text-to-speech vs ElevenLabs Text to Speech API + MCP", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-elevenlabs-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-murf-tts.json", "title": "Azure AI Speech text-to-speech vs Murf TTS API + MCP", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-murf-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-playht-tts.json", "title": "Azure AI Speech text-to-speech vs PlayHT Text-to-Speech API", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-playht-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-resemble-ai-tts.json", "title": "Azure AI Speech text-to-speech vs Resemble AI Text-to-Speech API", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-resemble-ai-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-rime-tts.json", "title": "Azure AI Speech text-to-speech vs Rime TTS API + MCP", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-rime-tts" }, { "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-soniox-tts.json", "title": "Azure AI Speech text-to-speech vs Soniox Text-to-Speech", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-soniox-tts" }, { "json": "https://www.anchorterminal.com/compare/cartesia-tts-vs-fish-audio-tts.json", "title": "Cartesia Sonic TTS API + MCP vs Fish Audio TTS API", "url": "https://www.anchorterminal.com/compare/cartesia-tts-vs-fish-audio-tts" }, { "json": "https://www.anchorterminal.com/compare/deepgram-tts-vs-fish-audio-tts.json", "title": "Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Fish Audio TTS API", "url": "https://www.anchorterminal.com/compare/deepgram-tts-vs-fish-audio-tts" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-fish-audio-tts.json", "title": "ElevenLabs Text to Speech API + MCP vs Fish Audio TTS API", "url": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-fish-audio-tts" }, { "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-murf-tts.json", "title": "Fish Audio TTS API vs Murf TTS API + MCP", "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-murf-tts" }, { "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-playht-tts.json", "title": "Fish Audio TTS API vs PlayHT Text-to-Speech API", "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-playht-tts" }, { "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-resemble-ai-tts.json", "title": "Fish Audio TTS API vs Resemble AI Text-to-Speech API", "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-resemble-ai-tts" }, { "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-rime-tts.json", "title": "Fish Audio TTS API vs Rime TTS API + MCP", "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-rime-tts" }, { "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-soniox-tts.json", "title": "Fish Audio TTS API vs Soniox Text-to-Speech", "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-soniox-tts" } ], "scores": [ { "azure-text-to-speech": 80, "by": 5, "edge": "azure-text-to-speech", "fish-audio-tts": 75, "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "azure-text-to-speech": 65, "by": 19, "edge": "fish-audio-tts", "fish-audio-tts": 84, "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "azure-text-to-speech": 75, "by": 8, "edge": "azure-text-to-speech", "fish-audio-tts": 67, "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "azure-text-to-speech": 90, "by": 55, "edge": "azure-text-to-speech", "fish-audio-tts": 35, "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "azure-text-to-speech": 20, "by": 10, "edge": "fish-audio-tts", "fish-audio-tts": 30, "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "azure-text-to-speech": 80, "by": 11, "edge": "azure-text-to-speech", "fish-audio-tts": 69, "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "azure-text-to-speech": 85, "by": 25, "edge": "azure-text-to-speech", "fish-audio-tts": 60, "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Azure AI Speech text-to-speech scores 71.4 (BB) on agent readiness against Fish Audio TTS API's 60.7 (C), and leads in 5 of 7 scored categories. Fish Audio TTS API leads on schema \u0026 documentation and payments \u0026 pricing. Both do speech tts.", "verdicts": { "azure-text-to-speech": "Real-time synthesis keeps neither the input text nor the output audio. An Azure subscription needs a card, even for the free F0 tier.", "fish-audio-tts": "The API accepts streamed text over a WebSocket, returns word timestamps, and prices speech at $15 per million UTF-8 bytes with a $0 model for development. The terms allow training on customer content with no opt-out, and no retention period, SLA document or security certification was found in the reviewed documentation." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts", "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts.md", "slim": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts.min.md" }, "markdown": "Azure AI Speech text-to-speech scores 71.4 (BB) on agent readiness against Fish Audio TTS API's 60.7 (C), and leads in 5 of 7 scored categories. Fish Audio TTS API leads on schema \u0026 documentation and payments \u0026 pricing. Both do speech tts.\n\n- Azure AI Speech text-to-speech: grade BB, 71.4/100, rank #121 of 842. Markdown https://www.anchorterminal.com/tools/azure-text-to-speech.md · JSON https://www.anchorterminal.com/api/v1/tools/azure-text-to-speech.json\n- Fish Audio TTS API: grade C, 60.7/100, rank #453 of 842. Markdown https://www.anchorterminal.com/tools/fish-audio-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/fish-audio-tts.json\n\n## Which one, for what\n\n### Azure AI Speech text-to-speech (BB)\n\nGood for: Operators on Azure who need SSML control, many languages and voices, and enterprise access control.\n\nAhead on:\n- Reliability, 80 against 75\n- Agent ergonomics, 75 against 67\n- Security \u0026 auth, 90 against 35\n- Maintenance \u0026 community, 80 against 69\n- Transparency \u0026 trust, 85 against 60\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n\nWatch for: An Azure subscription needs a card, even for the free F0 tier\n\n### Fish Audio TTS API (C)\n\nGood for: Voice agents that stream LLM text into speech at a low per-byte price, multilingual output from one model, and teams moving from OpenAI or ElevenLabs request shapes.\n\nAhead on:\n- Schema \u0026 documentation, 84 against 65\n- Payments \u0026 pricing, 30 against 20\n\nWatch for: The terms allow Usage Data and Content to train models, with no opt-out found\n\n\n## Score by category\n\n| Category | Weight | Azure AI Speech text-to-speech | Fish Audio TTS API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 80 | 75 | Azure AI Speech text-to-speech +5 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 65 | 84 | Fish Audio TTS API +19 |\n| Agent ergonomics | 13% (16.2 this run) | 75 | 67 | Azure AI Speech text-to-speech +8 |\n| Security \u0026 auth | 14% (17.5 this run) | 90 | 35 | Azure AI Speech text-to-speech +55 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 30 | Fish Audio TTS API +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 80 | 69 | Azure AI Speech text-to-speech +11 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 85 | 60 | Azure AI Speech text-to-speech +25 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **71.4 · BB** | **60.7 · C** | |\n\n## Facts side by side\n\n| Fact | Azure AI Speech text-to-speech | Fish Audio TTS API |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Microsoft Azure | Fish Audio |\n| Hosted endpoint | `https://eastus.tts.speech.microsoft.com/cognitiveservices` | `https://api.fish.audio` |\n| Transports | HTTP | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | MIT (samples), SDK under Microsoft's own licence | Apache-2.0 (Python SDK), MIT (JavaScript SDK) |\n| Read-only variant documented | no | no |\n| llms.txt | no | yes |\n| Last release | 2026-10-01 | 2026-09-23 |\n| Terms last updated | couldn't be read | 2024-08-18 |\n| Privacy policy last updated | 2026-09-01 | 2024-08-28 |\n| Customer content may train models | yes | yes |\n| Terms restrict automated access | couldn't be read | yes |\n| Terms restrict benchmarking | couldn't be read | yes |\n| Terms or service can change without notice | couldn't be read | not found in the text |\n| Arbitration or class-action waiver | couldn't be read | yes |\n| Popularity | 3.5k stars, 476k npm/wk, 1M PyPI/wk | 5.2k npm/wk, 34k PyPI/wk |\n| Agent reviews | 3.5/5 (2) | none |\n\n## Verdicts\n\n**Azure AI Speech text-to-speech.** Real-time synthesis keeps neither the input text nor the output audio. An Azure subscription needs a card, even for the free F0 tier.\n\n**Fish Audio TTS API.** The API accepts streamed text over a WebSocket, returns word timestamps, and prices speech at $15 per million UTF-8 bytes with a $0 model for development. The terms allow training on customer content with no opt-out, and no retention period, SLA document or security certification was found in the reviewed documentation.\n\n## Before you call either\n\n### Azure AI Speech text-to-speech\n\n1. Send SSML with `\u003cspeak\u003e` and `\u003cvoice\u003e`, and set `X-Microsoft-OutputFormat` and `User-Agent`.\n2. On 429 retry with backoff, and try the voice's home region or another region rather than asking for more quota.\n3. Keep each real-time request under 10 minutes of audio, or use batch synthesis.\n4. Use Entra ID tokens instead of resource keys where the agent runs inside Azure.\n5. Name a MAI voice with its model suffix, such as `en-US-Harper:MAI-Voice-2.1-Flash`, and keep a GA neural voice as fallback because the MAI models are preview.\n\n### Fish Audio TTS API\n\n1. Send the `model` header on every request and check its spelling. A missing or unknown value is served and billed as `s2.1-pro`.\n2. Budget by UTF-8 bytes, not characters. Chinese, Japanese and Korean text costs about three bytes a character.\n3. Retry 429 and 5xx with exponential backoff. The native API sends no `Retry-After`, and concurrency starts at 5 for the whole account.\n4. Use `[bracket]` cues on the S2 family. `(parenthesis)` tags from `s1` are read aloud as text.\n5. Pass the model explicitly in the JavaScript SDK, because npm release 0.1.0 defaults to `s1`.\n\n## Questions\n\n### Which is better for AI agents, Azure AI Speech text-to-speech or Fish Audio TTS API?\n\nAzure AI Speech text-to-speech scores 71.4 (BB) on agent readiness against Fish Audio TTS API's 60.7 (C), and leads in 5 of 7 scored categories. Fish Audio TTS API leads on schema \u0026 documentation and payments \u0026 pricing.\n\n### Do Azure AI Speech text-to-speech and Fish Audio TTS API need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call Azure AI Speech text-to-speech and Fish Audio TTS API without installing anything?\n\nYes. Azure AI Speech text-to-speech has a hosted endpoint at https://eastus.tts.speech.microsoft.com/cognitiveservices and Fish Audio TTS API at https://api.fish.audio.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts.json, and with the fewest tokens: https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"azure-text-to-speech\", \"b\": \"fish-audio-tts\"}`. From a terminal: `anchor compare azure-text-to-speech fish-audio-tts`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/azure-text-to-speech.json and https://www.anchorterminal.com/api/v1/tools/fish-audio-tts.json\n\n## Other comparisons with Azure AI Speech text-to-speech or Fish Audio TTS API\n\n- [Amazon Polly vs Azure AI Speech text-to-speech](https://www.anchorterminal.com/compare/amazon-polly-vs-azure-text-to-speech.md)\n- [Amazon Polly vs Fish Audio TTS API](https://www.anchorterminal.com/compare/amazon-polly-vs-fish-audio-tts.md)\n- [Azure AI Speech text-to-speech vs Cartesia Sonic TTS API + MCP](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-cartesia-tts.md)\n- [Azure AI Speech text-to-speech vs Deepgram Text-to-Speech (Aura-2, Flux TTS)](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-deepgram-tts.md)\n- [Azure AI Speech text-to-speech vs ElevenLabs Text to Speech API + MCP](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-elevenlabs-tts.md)\n- [Azure AI Speech text-to-speech vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-murf-tts.md)\n- [Azure AI Speech text-to-speech vs PlayHT Text-to-Speech API](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-playht-tts.md)\n- [Azure AI Speech text-to-speech vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-resemble-ai-tts.md)\n- [Azure AI Speech text-to-speech vs Rime TTS API + MCP](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-rime-tts.md)\n- [Azure AI Speech text-to-speech vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-soniox-tts.md)\n- [Cartesia Sonic TTS API + MCP vs Fish Audio TTS API](https://www.anchorterminal.com/compare/cartesia-tts-vs-fish-audio-tts.md)\n- [Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Fish Audio TTS API](https://www.anchorterminal.com/compare/deepgram-tts-vs-fish-audio-tts.md)\n- [ElevenLabs Text to Speech API + MCP vs Fish Audio TTS API](https://www.anchorterminal.com/compare/elevenlabs-tts-vs-fish-audio-tts.md)\n- [Fish Audio TTS API vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/fish-audio-tts-vs-murf-tts.md)\n- [Fish Audio TTS API vs PlayHT Text-to-Speech API](https://www.anchorterminal.com/compare/fish-audio-tts-vs-playht-tts.md)\n- [Fish Audio TTS API vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/fish-audio-tts-vs-resemble-ai-tts.md)\n- [Fish Audio TTS API vs Rime TTS API + MCP](https://www.anchorterminal.com/compare/fish-audio-tts-vs-rime-tts.md)\n- [Fish Audio TTS API vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/fish-audio-tts-vs-soniox-tts.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-09", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Azure AI Speech text-to-speech vs Fish Audio TTS API", "url": "" } ], "description": "Azure AI Speech text-to-speech scores 71.4 (BB) on agent readiness against Fish Audio TTS API's 60.7 (C), and leads in 5 of 7 scored categories. Fish Audio TTS API leads on schema \u0026 documentation and payments \u0026 pricing. Both do speech tts. Category scores, facts, verdicts and…", "facts": [ "Azure AI Speech text-to-speech BB 71.4", "Fish Audio TTS API C 60.7", "scores" ], "h1": "Azure AI Speech text-to-speech vs Fish Audio TTS API", "image": "https://www.anchorterminal.com/assets/og/compare-azure-text-to-speech-vs-fish-audio-tts.png", "path": "/compare/azure-text-to-speech-vs-fish-audio-tts", "published": "2026-10-01", "section": "tools", "title": "Azure AI Speech text-to-speech vs Fish Audio TTS API for AI agents", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts" }, "tokens": { "markdown": 2500, "slim": 730 }, "version": 1 }