Rev AI: Provides enterprise-grade audio transcription and speech-to-text APIs tailored for legal and media compliance workflows. Rev AI records 50,708 monthly visits with -18.4% month-over-month growth and Free Trial, Paid pricing. Soniox records 335,647 monthly visits with +2.2% growth and Paid pricing.
Developer-first speech-to-text API with industry-leading accuracy
One speech AI API for recognition, generation, and translation in 60+ languages
| Dimension / Metric | | |
|---|---|---|
| Official Domain | rev.ai | soniox.com |
| Pricing Model | Free Trial, Paid | Paid |
| Monthly Visits | 50.71K (50,708) | 335.65K (335,647) |
| MoM Traffic Delta | -11.42K (-18.4%) | +7.29K (+2.2%) |
| Primary Market & Share | 🇺🇸 United States (36.1%) | 🇺🇸 United States (12.5%) |
| Direct Visits / mo | 22.44K | 181.75K |
| User Rating | 4.4 | 4.5 |
| Supported Platforms | Website | Website |
Developer-first speech-to-text API with industry-leading accuracy
Transcribe pre-recorded files in minutes or stream live audio through a real-time endpoint, with punctuation, casing, and formatting applied automatically.
Recognize speech across more than 57 languages and dialects, with benchmarked accuracy that the company reports as the best among major vendors.
Layer language identification, sentiment analysis, topic extraction, summarization, and translation on top of any transcript to turn audio into structured intelligence.
Generate exact word-level timing for media, subtitles, accessibility, and content indexing workflows.
One speech AI API for recognition, generation, and translation in 60+ languages
Soniox STT delivers high accuracy across 60+ languages, accents, numbers, names, and domain vocabulary, engineered for fast multi-speaker conversations and noisy environments.
Generate expressive speech in 60+ languages with audio tags, alphanumeric accuracy, seamless language switching, 200+ built-in voices, and instant voice cloning.
Translate speech in real time across roughly 3,600 language pairs, with low-latency output that starts before a sentence finishes and handles mid-sentence language switching.
Streaming models transcribe speech and start generating audio from the first few words, keeping interaction fast enough for live voice agents and captions.
Industry leader for high-fidelity speech synthesis and voice cloning, though less focused on raw streaming STT infrastructure.
Industry leader for high-fidelity speech synthesis and voice cloning, though less focused on raw streaming STT infrastructure.
Free / Open-sourceOpen-source voice platform offering studio-grade text-to-speech and instant cloning, suitable for self-hosting deployments.
Free / Open-sourceOpen-source voice platform offering studio-grade text-to-speech and instant cloning, suitable for self-hosting deployments.
SpecialistProvides expressive multilingual text-to-speech and voice cloning APIs with strong performance across global languages.
SpecialistProvides expressive multilingual text-to-speech and voice cloning APIs with strong performance across global languages.
AI teammate that records, transcribes and summarizes every meeting
AI teammate that records, transcribes and summarizes every meeting
AI transcription and meeting notes in 150+ languages
AI transcription and meeting notes in 150+ languages
Delivers extremely low-latency real-time text-to-speech and streaming transcription APIs tailored for conversational agents.
Delivers extremely low-latency real-time text-to-speech and streaming transcription APIs tailored for conversational agents.
AI and human transcription, captions and investigative case analysis in one platform
AI and human transcription, captions and investigative case analysis in one platform
Turn any video or audio into text in seconds
Provides ultra-fast real-time speech-to-text and voice AI APIs, but with less emphasis on integrated translation.
Provides ultra-fast real-time speech-to-text and voice AI APIs, but with less emphasis on integrated translation.
SpecialistSpecialises in orchestrating conversational voice agents and telephony integrations rather than standalone speech APIs.
AI transcription, translation and subtitles for audio and video
AI transcription, translation and subtitles for audio and video
Offers highly accurate speech-to-text transcription and audio intelligence APIs, though lacking native voice cloning features.
Offers highly accurate speech-to-text transcription and audio intelligence APIs, though lacking native voice cloning features.
