Alternatives

Products that do what Speechmatics does

Voice AI APIs for building real-world voice applications

1
AssemblyAI - Speech-to-Text API▲997
APIs to automatically transcribe and understand audio
2017 · assemblyai.com
2
Async Voice AI▲248
High-quality text-to-speech, designed for developers
2025
3
Realtime TTS-2▲153
Voice AI that feels as good as it sounds
May 2026 · inworld.ai
4
gpt-realtime▲266
For reliable, production-ready voice agents
2025
5
OpenAI GPT-4o Audio Models▲390
Build Powerful Voice Agents
2025
6
AI Voices by Asyncflow v1.0▲401
Premium AI voice quality without the premium price tag.
2025
7
Text-to-Speech by Smallest.ai▲121
Hyper-realistic AI voiceovers
2025
8
Unreal Speech▲337
Fast & Affordable Text-to-Speech API
2025
9
SpeechFlow▲118
Multilingual speech-to-text API trained on 100M+ utterances
2023
10
gpt-realtime-1.5 by OpenAI▲304
Tighter instruction adherence in speech agents
Feb 2026
11
Krisp Voice Translation API▲275
Real-time speech-to-speech translation API
Jun 2026 · krisp.ai
12
Parrot Speech-to-text API▲194
Fast, accurate STT for production-grade voice agents
May 2026 · ringg.ai
13
All Voice Lab▲327
Ultra-realistic AI voices & cloning
2025
14
Fish Audio S2▲331
Real Expressive AI Voices
Mar 2026
15
Unreal Speech▲314
Better and 8x cheaper text-to-speech than AWS
2022
16
Unlimited Voice Transcription with API▲479
Fast voice-to-text on 92 languages
2023
17
Speechly Reactive Voice UI API▲147
Build voice features remarkably fast
2022
18
Inworld TTS▲318
Voice AI that’s 5% of the cost. 100% of the quality.
2025
19
AI Voice Agent SDK▲295
The open-source framework for real-time AI voice
2025
20RT
Real-time AI Voice Chat at ~500ms Latency▲524
2025 · github.com
21
Wavel AI▲289
Most realistic and natural AI voiceover & dubbing for videos
2023
22
VoiceAI▲116
Capture every conversation
2023
23
Ztalk.ai▲450
Real-time voice translation
2025
24
AssemblyAI: Universal-3 Pro Streaming▲118
The most accurate streaming speech model for voice agents.
Mar 2026

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