Best Text-to-Speech APIs
Opinionated picks for text-to-speech apis, with the trade-offs up front, judged from each API’s published, cited data. The reasoning is shown, so disagree where you know better. Compare all 13 →
Best overall: ElevenLabs Text to Speech
ElevenLabs Text to Speech is a REST API delivering high-quality, human-like AI voices for use cases spanning voice agents, audiobook production, video narration, game character voiceovers, and real-time conversational AI, with support for over a dozen synthesis capabilities including streaming, voice cloning, and multilingual output. Pricing starts at $6/month for 30,000 characters on the Starter plan, with a free tier of 10,000 characters per month and self-serve signup requiring no sales call. The API holds SOC 2 Type 2, ISO 27001, HIPAA, GDPR, and PCI DSS certifications, and offers Python and Node.js SDKs plus an MCP server. Notable customers include the Washington Post, HarperCollins, ESPN, and NVIDIA.
From $6 month (30,000 characters on Starter; ~$200/1M chars) · free tier available.
How it stacks up
- ✓ ElevenLabs Text to Speech supports webhooks for event-driven integration; the other does not document them.
- ✓ ElevenLabs Text to Speech supports webhooks for event-driven integration; the other does not document them.
- ✓ ElevenLabs Text to Speech supports webhooks for event-driven integration; the other does not document them.
Best for: Prototypes and side projects - free to start, no sales call; Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt).
At a glance
| # | API | Best for | Starting price | Score |
|---|---|---|---|---|
| 1 | ElevenLabs Text to Speech | Best overall · Best free pick · Best for enterprise · Best for agents | $6 month (30,000 characters on Starter; ~$200/1M chars) | 81 |
| 2 | Azure AI Text to Speech | transparent public pricing | $15 1M characters | 79 |
| 3 | Amazon Polly | Cheapest to start · Broadest surface | $4 1M characters | 72 |
| 4 | Google Cloud Text-to-Speech | transparent public pricing | $4 1M characters | 68 |
| 5 | Cartesia (Sonic) | transparent public pricing | $50 1M characters | 68 |
| 6 | Murf AI | transparent public pricing | $0 1,000 characters | 66 |
| 7 | OpenAI Text to Speech (gpt-4o-mini-tts / tts-1) | transparent public pricing | $15 1M characters | 68 |
| 8 | Hume AI Octave TTS | transparent public pricing | $50 1M characters | 69 |
| 9 | Deepgram Aura (Text to Speech) | transparent public pricing | $0 1,000 characters | 68 |
| 10 | Speechmatics Text to Speech | transparent public pricing | $0.01 1,000 characters | 67 |
| 11 | Resemble AI | transparent public pricing | $0.0005 second | 62 |
| 12 | Rime | transparent public pricing | $30 1M characters | 58 |
| 13 | LMNT | transparent public pricing | $0.04 1K characters | 58 |
Quick pick by use case
- If you want the strongest all-round pick, pick ElevenLabs Text to Speech - our default pick: strongest across pricing, trust and breadth.
- If you want to start free, pick ElevenLabs Text to Speech - free tier: Free plan at $0/month includes 10,000 credits per month (1 text character = 1 credit for….
- If you're buying for a regulated or large team, pick ElevenLabs Text to Speech - for regulated or large teams: SOC 2 Type II, HIPAA, enterprise plan.
- If you want the lowest published entry price, pick Amazon Polly - from $4 1M characters to start; compare on your real usage, not the entry price.
- If you're wiring this into coding agents or AI workflows, pick ElevenLabs Text to Speech - easiest to wire up programmatically: MCP server + llms.txt.
- If you want the broadest documented surface, pick Amazon Polly - 22 documented actions; breadth isn't quality, but it's the most to build on.
The picks in depth
#1 ElevenLabs Text to Speech
81 / 100- Best overall
- Best free pick
- Best for enterprise
- Best for agents
ElevenLabs Text to Speech is a REST API delivering high-quality, human-like AI voices for use cases spanning voice agents, audiobook production, video narration, game character voiceovers, and real-time conversational AI, with support for over a dozen synthesis capabilities including streaming, voice cloning, and multilingual output. Pricing starts at $6/month for 30,000 characters on the Starter plan, with a free tier of 10,000 characters per month and self-serve signup requiring no sales call. The API holds SOC 2 Type 2, ISO 27001, HIPAA, GDPR, and PCI DSS certifications, and offers Python and Node.js SDKs plus an MCP server. Notable customers include the Washington Post, HarperCollins, ESPN, and NVIDIA.
PricingHybrid · from $6 month (30,000 characters on Starter; ~$200/1M chars) · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSSDoesUsed byWashington Post, HarperCollins, TIME, The New YorkerStrengthstransparent public pricing · a free tier · self-serve signupScoresAgent 65 · Pricing 100 · Setup 85 · Docs 55 · Procurement 100 · Trust 80#2 Azure AI Text to Speech
79 / 100Azure AI Text to Speech is Microsoft's managed speech synthesis service, suited for voice agents, call center automation, audiobook narration, accessibility tools, and content creation. It offers over 30 deployment regions, a free tier of 500,000 characters per month, and usage-based pricing starting at $15 per million characters for standard voices. SDKs are available for Python, C#, JavaScript, Java, and Go, and the service carries SOC 2 Type 2, HIPAA, GDPR, ISO 27001, and PCI DSS certifications. Custom and personal voice cloning are supported, though professional voice fine-tuning requires limited-access approval.
PricingUsage · from $15 1M characters · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSSDoesStrengthstransparent public pricing · a free tier · self-serve signupScoresAgent 65 · Pricing 100 · Setup 85 · Docs 25 · Procurement 100 · Trust 100#3 Amazon Polly
72 / 100- Cheapest to start
- Broadest surface
Amazon Polly is an AWS cloud text-to-speech service, launched in 2016, suited for mobile apps, eLearning platforms, accessibility tools, IVR systems, and IoT applications. Pricing is usage-based at $4.00 per million characters, with a permanent free tier of 5 million standard-voice characters per month and additional neural, long-form, and generative character allowances for the first year. SDKs are available in ten languages including Python, Node.js, Java, Go, and Rust, and the service is available across more than 20 AWS regions including GovCloud. It holds SOC 2 Type 2, HIPAA, GDPR, ISO 27001, and PCI DSS certifications.
PricingUsage · from $4 1M characters · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSSDoesStrengthstransparent public pricing · a free tier · self-serve signupScoresAgent 30 · Pricing 100 · Setup 85 · Docs 15 · Procurement 100 · Trust 100#4 Google Cloud Text-to-Speech
68 / 100Google Cloud Text-to-Speech converts text or SSML input into natural-sounding audio, targeting voice agents, IVR systems, audiobook narration, accessibility tools, and real-time conversational AI. It offers a generous free tier (up to 4 million characters per month for Standard voices, 1 million for WaveNet and Neural2), with paid tiers starting at $4 per million characters on a self-serve, usage-based model. The API ships SDKs for eight languages, supports streaming and long-form synthesis, and carries SOC 2 Type 2, HIPAA, GDPR, and ISO 27001 certifications with a published SLA.
PricingUsage · from $4 1M characters · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001DoesUsed byIngram Content GroupStrengthstransparent public pricing · a free tier · self-serve signupScoresAgent 20 · Pricing 100 · Setup 85 · Docs 15 · Procurement 100 · Trust 90#5 Cartesia (Sonic)
68 / 100Cartesia's Sonic API is a text-to-speech service built for low-latency voice applications such as conversational AI agents, customer support, dubbing, and audiobook narration, with a reported first-audio-byte latency of 90ms on Sonic 3.5. Pricing starts at $50 per million characters with a free tier of 20,000 characters per month, and self-serve signup is available without a sales call. The API supports REST and WebSocket streaming, instant voice cloning on all plans, and deploys across cloud regions, on-premises, and on-device. Cartesia holds SOC 2 Type II, HIPAA, GDPR, and PCI DSS certifications, and counts Quora, Cresta, and Rasa among its customers.
PricingHybrid · from $50 1M characters · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · PCI DSSDoesUsed byQuora, Cresta, RasaStrengthstransparent public pricing · a free tier · self-serve signupScoresAgent 50 · Pricing 100 · Setup 80 · Docs 15 · Procurement 100 · Trust 65#6 Murf AI
66 / 100Murf AI is a text-to-speech API offering 150+ voices across 35 languages, supporting studio voiceovers, real-time streaming synthesis, professional voice cloning, dubbing, and translation. Pricing is usage-based per 1,000 characters with a one-time free tier of 100,000 characters and self-serve signup, scaling to custom enterprise plans. The API delivers time-to-first-audio under 130ms via its Falcon 2 model, with WebSocket streaming, webhooks, Python and Node.js SDKs, and an MCP server. It holds SOC 2 Type 2, ISO 27001, GDPR, and HIPAA certifications, with customers including Pfizer, Cisco, and Oracle.
PricingUsage · from $0 1,000 characters · free tier ✗TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001DoesUsed byPfizer, Cisco, Splunk, GlencoreStrengthstransparent public pricing · self-serve signup · SOC 2 Type IIAvoid ifYou want to try it free before payingScoresAgent 55 · Pricing 85 · Setup 55 · Docs 45 · Procurement 85 · Trust 70#7 OpenAI Text to Speech (gpt-4o-mini-tts / tts-1)
68 / 100OpenAI Text to Speech converts text into lifelike spoken audio via three models, gpt-4o-mini-tts, tts-1, and tts-1-hd, targeting use cases such as voice agents, audiobooks, video narration, accessibility tools, and IVR. Pricing is usage-based at $15.00 per million characters with no sales call required to get started. The REST API ships with official SDKs for Python, Node.js, Java, Go, Ruby, and .NET, and the service is backed by SOC 2 Type II, ISO 27001, HIPAA, GDPR, and PCI DSS compliance alongside a published SLA.
PricingUsage · from $15 1M characters · free tier ✗TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSSDoesStrengthstransparent public pricing · self-serve signup · SOC 2 Type IIAvoid ifYou want to try it free before payingScoresAgent 30 · Pricing 85 · Setup 60 · Docs 50 · Procurement 85 · Trust 100#8 Hume AI Octave TTS
69 / 100Hume AI Octave is a text-to-speech API focused on emotionally expressive, natural-sounding voice synthesis, targeting voice agents, audiobooks, podcasts, and conversational applications. Pricing starts at $50 per million characters with a free tier of 10,000 characters per month, self-serve signup, and an enterprise plan for higher volume. SDKs are available for Python, TypeScript, C#/.NET, and Swift, and the API supports WebSocket streaming with first-audio latency as low as 100ms on Octave 2. The service holds SOC 2 Type 2, HIPAA, and GDPR certifications.
PricingHybrid · from $50 1M characters · free tier ✓TrustSOC 2 Type II · HIPAA · GDPRDoesUsed byNiantic Spatial, GAF, CoconoteStrengthstransparent public pricing · a free tier · self-serve signupScoresAgent 40 · Pricing 100 · Setup 85 · Docs 35 · Procurement 100 · Trust 55
How we rank
The headline score is the average of six 0-100 axes computed only from each API’s published, sourced fields: agent-friendliness, pricing transparency, setup speed, docs quality, procurement ease, and trust readiness. An unknown signal scores 0 for its axis - we credit what’s confirmed, never guess. The score is one input, not the verdict: we lead with each pick’s trade-off, and where a job has only one real option we say so rather than crown it. Full method on the methodology page.
Why trust apio
- ✓ Every field cited. Each profile links the source for every claim - check us.
- ✓ Public audit log. Every change to this data is recorded per field, with who changed it and why.
- ✓ Published, deterministic methodology. The score is a formula over the same fields you can see - recompute it yourself.
- ✓ Zero affiliate links, zero ads, zero paid placement. Money never moves rank.
- ✓ No reviews yet - and we say so rather than synthesizing them.
Frequently asked questions
What is the best text-to-speech api?
ElevenLabs Text to Speech is our current top pick across pricing, trust, and developer-surface data (from $6 month (30,000 characters on Starter; ~$200/1M chars)). The right pick depends on your constraint: if you want the strongest all-round pick, ElevenLabs Text to Speech; if you want to start free, ElevenLabs Text to Speech; if you're buying for a regulated or large team, ElevenLabs Text to Speech.
How are these Text-to-Speech APIs ranked?
By a transparent data-readiness score computed from each API's published, sourced fields: pricing, free tier, self-serve access, compliance, webhooks/sandbox, and capability breadth. No reviews, no paid placement.
Which Text-to-Speech APIs have a free tier?
ElevenLabs Text to Speech, Azure AI Text to Speech, Amazon Polly, Google Cloud Text-to-Speech, Cartesia (Sonic), Hume AI Octave TTS, Speechmatics Text to Speech, LMNT.