Text-to-speech developer tools
Every listing tagged text-to-speech, A to Z: 9 tools across 1 category. Listed in alphabetical order, not ranked.
Amazon Polly
AWS's text-to-speech service: Generative, Long-Form, Neural and Standard voices billed per character, with Speech Marks for lip sync and word highlighting, and free replay of audio you cache.
Azure Speech
Microsoft's speech service in Azure AI Foundry: neural and Neural HD text-to-speech voices, custom professional voices and long-form audio, next to speech-to-text and translation, with containers on commitment tiers.
Cartesia
Text-to-speech API built for voice agents: Sonic 3.6 speaks 44 languages and reads confirmation codes without preprocessing, with instant voice cloning. Speech-to-text and voice agents from the same company.
Deepgram
Speech-to-text API: Nova-3 transcribes recorded files and live streams in 60+ languages, Flux adds turn detection for English voice agents, with diarization, keyterm prompting and redaction, billed per second. Aura-2 text-to-speech in 7 languages on the same key, and self-hosted containers on Enterprise.
DeepInfra
OpenAI-compatible API for open models such as Llama, DeepSeek and Qwen, billed per token with Standard, Priority and Flex tiers. Also open text-to-speech models such as Kokoro, billed per character, open embedding models such as Qwen3-Embedding and bge-m3, FLUX image generation models billed per image, and dedicated GPUs for your own LLMs billed by the minute.
ElevenLabs Text to Speech
ElevenLabs' text-to-speech API: Eleven v4 for expressive speech in 90+ languages with audio tags, v4 Turbo at about 100 ms for agents, and Flash for the lowest latency. Use any voice in your library by ID, clones included. Billed per 1,000 characters.
Google Cloud Text-to-Speech
Google Cloud's text-to-speech API: Chirp 3 HD voices, Gemini-TTS models, instant custom voices, and older Neural2, WaveNet and Standard voices, billed per character with a monthly free allowance on most voice types.
OpenAI Text to Speech
OpenAI's text-to-speech endpoint: gpt-4o-mini-tts takes prompts for tone, accent and pace, with 13 built-in voices, streaming and custom voices. tts-1, tts-1-hd and gpt-4o-mini-tts shut down on January 6, 2027; the replacement is gpt-realtime-2.1-mini on the Realtime API.
Rime
Text-to-speech API for phone and voice agents: Mist v3 for the lowest latency, Coda v2 for the most natural read in 10 languages, streaming over HTTP and WebSockets, billed by the minute. English pronunciation control, speech-to-text too, and self-hosting on Enterprise.