TTS API at $9.99/mo Flat, Unlimited Characters Fair use 10M characters per 30 days. Cheaper than OpenAI tts-1 above about 666K characters a month.

EasyVoice — flat $9.99/mo unlimited, open-weight, OpenAI-compatible

We're the flat-rate challenger in this list. The thesis: per-character pricing punishes scale, and a generous free tier (5K chars/day, no card) plus a single Pro plan (unlimited generations at $9.99/mo) wins for the long tail of developers who don't want to model character costs into every feature. The model under the hood is Kokoro-82M — an 82-million-parameter open-weight neural TTS released on Hugging Face under Apache-2.0 by hexgrad. 66 voices across 9 languages (American and British English, Spanish, French, Italian, Portuguese, Japanese, Hindi, and Modern Standard Arabic on a dedicated Supertonic engine). Responses are complete audio files rather than a chunked stream. Request shape closely mirrors OpenAI's audio.speech.create, so existing OpenAI TTS code drops in with a URL change. Best at: developer projects, indie SaaS, accessibility tools, voice-AI startups, anything where unpredictable usage burns budget on per-char pricing. Where we lose: locales beyond the nine we support, and enterprise procurement teams that need named-entity vendor relationships with a US-based seller.

Get started: grab a free API key, read the API docs, or jump straight to the OpenAI migration guide if you're swapping from tts-1.

OpenAI tts-1 / tts-1-hd — the default for ChatGPT-stack apps

OpenAI's TTS endpoint is the obvious first stop for any developer already authenticated to the OpenAI platform. Two models: tts-1 (faster, lower fidelity) and tts-1-hd (slower, higher fidelity), both billed per character (list prices are in the table above). Nine voices on both models: alloy, ash, coral, echo, fable, onyx, nova, sage, shimmer (the newer gpt-4o-mini-tts model has 13). A single multilingual model handles 57 languages reasonably well — pronunciation degrades on tail languages but is solid on the major locales. There's no free tier, so every request bills from byte one. Best at: integrating into an existing OpenAI-stack app where one Bearer token covers everything, low-volume voice features (under ~300K chars/mo). Where it loses: high-volume use (per-char math punishes scale), unpredictable workloads (no flat-rate option), and any team that wants open-weight auditability.

Migration path: /openai-tts-alternative/migration-guide covers the base-URL change and voice mapping (alloy → af_alloy, onyx → am_onyx, etc.). Cost comparison and breakeven math at /compare/openai-tts.

OpenAI's deprecations page lists tts-1, tts-1-hd and the gpt-4o-mini-tts snapshots for removal on 6 January 2027 (checked 16 October 2026); to keep an OpenAI SDK speech call working, change the base URL and the API key to EasyVoice's. See the OpenAI TTS removal page.

ElevenLabs — voice cloning leader, premium realism

ElevenLabs is the realism benchmark in this list — especially their Multilingual v2 and Eleven Turbo v2.5 models for emotion-aware, expressive narration. They pioneered hosted voice cloning at consumer pricing: upload 60 seconds of your own voice, generate audio in your voice in minutes. The catalog is 1000+ pre-built and cloned voices across 29+ languages. The pricing model is tiered — Free (10K chars/mo), Starter ($6/mo), Creator ($22/mo), Pro ($99/mo) and up, and per-character on top once you exceed the tier allowance. Best at: audiobook production, character voices for games, marketing voiceover where the listener needs to feel real emotion, voice cloning for personal brands. Where it loses: predictable-flat-bill use cases (the tiered + per-char model is harder to model than flat $9.99), pure transactional TTS (chatbot prompts, notification readouts) where the realism premium isn't earning its keep.

If you need cloning, ElevenLabs wins. If you don't, we'd argue EasyVoice's flat rate makes more sense — see /compare/elevenlabs for the full comparison, or the ElevenLabs API pricing breakdown for their credit tiers converted to $/1M-character rates.

Google Cloud TTS — broadest language coverage, GCP-native

Google Cloud Text-to-Speech bills per character and prices by voice tier: Standard and WaveNet at the low end, Neural2 and Chirp 3 HD above them, and Studio for the highest-end voice (read Google's own pricing page for the current rates). 220+ voices, 40+ languages. The Studio tier voices are some of the most natural in the industry — they cost accordingly. Authentication is GCP service-account JSON or OAuth, which is heavier than a Bearer token but normal if you're already on GCP. The monthly free allowance (4M characters on Standard and WaveNet, 1M on Neural2, Chirp 3 HD and Studio) is generous but requires a billing-enabled GCP project. Best at: GCP-native enterprises that already have the IAM and billing wired in, apps needing tail-language coverage (Zulu, Cebuano, Bengali, etc.), high-end one-off productions willing to pay Studio prices. Where it loses: simple bootstrap use cases (the GCP onboarding overhead is real), small teams that don't want to maintain a service-account secret.

Azure Speech Neural TTS — enterprise locale coverage

Azure's neural TTS catalog is the broadest in the industry by locale count: 400+ voices across 140+ locales, including dialect and accent variants most competitors don't ship. Pricing is per character, with a higher rate for Custom Neural Voice (read Azure's own pricing page for the current rates); the free tier is 500K chars/mo. Auth is Azure subscription key + region. Best at: multinational enterprises that need every locale and dialect, regulated industries with Azure compliance contracts already in place, custom voice (clone-your-voice) production. Where it loses: developer-friction onboarding (subscription key + region + endpoint config is heavier than a Bearer token), small projects (you're paying enterprise-tier complexity for basic TTS).