Rev AI
ten cents an hour — the cheapest number in this ranking, attached to the least complete pricing page.
less than half assemblyai's rate and a third of whisper's, with real-time pricing and diarization costs that simply aren't published.
$0.10 an hour on reverb turbo is the lowest published rate anywhere in this ranking, with the standard reverb model at $0.20 and whisper-based options at $0.30. free credits equivalent to five hours of reverb make it cheap to evaluate.
rev describes reverb and reverb turbo as open-source models, which would give it a self-hosting path alongside whisper's — but we could not confirm the licence or repository within budget, so treat that as a promising lead rather than a fact. its marketing cites gains 'over competitors' rather than an absolute error rate against a named dataset, so there's no accuracy figure here we'd publish.
the description above is ours, condensed from the ranking. pricing moves — check it on the vendor's own page before you rely on it.
- category
- speech-to-text apis
- pricing
- $0.10/hr
- website
- rev.ai
less than half assemblyai's rate and a third of whisper's, with real-time pricing and diarization costs that simply aren't published.
we researched this category against vendors' own pricing pages and licence files. that is where this line comes from — not from the vendor, and not from anything they paid for.
more speech-to-text apis
Gladia
we checked this$0.61/hrthe only vendor here that makes not training on your audio the contractual default, with diarization thrown in free.
AssemblyAI
we checked this$0.15/hrcheapest managed batch transcription, quoted in the right unit — with streaming billed by the clock, not the audio.