Deepgram vs Rev AI
This is the verified Deepgram vs Rev AI breakdown: Deepgram (Developer-first realtime STT API for voice agents and transcription at scale) and Rev AI (Transcription-heritage STT API with low per-hour pricing and open (non-commercial) Reverb models) are Speech-to-text APIs platforms, priced from $0.0043/min and $0.0033/min respectively. The bottom line, head-to-head facts, and true cost tiers follow.
Rev AI and Deepgram split this comparison, so it is a tie overall. Rev AI fits teams that prioritize developers. Deepgram fits teams that prioritize voice agents. Pick by the use case that matters most to you.
Reviewed by vsref Editorialfacts verified Jul 20, 2026Methodology →
It is close, and the right pick depends on your use case. Start a free trial, or read the verdicts below.
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Deepgram vs Rev AI: head-to-head facts
Every row independently verified| Fact | ||
|---|---|---|
| Batch price per audio minute | 0.004 $/audio-minJul 20 | 0.003 $/audio-minJul 20 |
| Streaming price per audio minute | 0.005 $/audio-minJul 20 | n/a |
| Free tier quota | $200 credit, no expiration, no credit card requiredJul 20 | Free credits equal to 5 hours of Reverb ASRJul 20 |
| WER (third-party benchmark) | 5.18 % WERJul 20 | 5.92 % WERJul 20 |
| Streaming latency (vendor-claimed) | ~300 msJul 20 | n/a |
| Languages supported | ~50Jul 20 | 57Jul 20 |
| Speaker diarization | ◑ Paid add-onJul 20 | ✓ IncludedJul 20 |
| Model weights license | n/a | Rev Model Non-Production License - non-commercialJul 20 |
Deepgram vs Rev AI pricing: true cost at 3 usage tiers
Monthly bill from published per-minute rates, batch and streaming separately. Sticker rates only; diarization and PII redaction add-ons price in the stack builder.Deepgram vs Rev AI: verdicts by use case
For developers building transcription products, batch pricing is the heaviest factor. Rev AI charges $0.003 per audio minute versus Deepgram's $0.004, a meaningful 25% cost advantage at scale. On SDK coverage, Rev AI offers Python, JS/TS, Java, Go, and Ruby, while Deepgram covers JS/TS, Python,.NET, Go, Java, and Rust. Both are strong but differ in language mix rather than depth. Both tools offer websocket streaming APIs and word-level timestamps, so those attributes are balanced. On supported formats, Deepgram lists 100+ formats explicitly while Rev AI supports all FFmpeg formats, which is also extensive. The batch price edge for Rev AI is decisive given its weight of 4/5 and a clear numeric advantage.
Neither Rev AI nor Deepgram publishes information covering dictation platforms, local versus cloud processing, AI formatting features, app pricing structure, or app integrations. Available information addresses cloud API pricing, accuracy benchmarks, and compliance. Rev AI's batch price is 0.003 dollars per audio minute versus Deepgram's 0.004 dollars per audio minute, and Deepgram's third-party WER is 5.18 percent versus Rev AI's 5.92 percent, but these API-level figures do not resolve the five attributes that actually decide voice dictation suitability. With no verified information on those deciding attributes, neither tool can be named the winner.
For voice agents, streaming latency is the top factor. Deepgram publishes a vendor-claimed streaming latency of 300 ms, while Rev AI publishes no latency figure at all, making Deepgram the only tool with a concrete latency commitment. Both offer websocket streaming APIs, so that attribute is equal. On streaming price, Deepgram charges 0.005 per audio minute versus no published rate for Rev AI, giving Deepgram a transparent cost structure. Concurrency is a decisive gap: Deepgram allows 150 concurrent websocket connections on the base pay-as-you-go plan, while Rev AI caps streaming at just 10 concurrent streams. Both support custom vocabulary. Deepgram leads on every attribute that matters most for real-time voice bot pipelines.
Deepgram vs Rev AI: common questions
Is Rev AI cheaper than Deepgram?+−
For batch transcription, Rev AI costs $0.003 per audio minute versus Deepgram at $0.004 per audio minute, making Rev AI the less expensive option. However, if you need speaker diarization, Rev AI includes it while Deepgram charges an additional $0.002 per audio minute, which can narrow or reverse the cost gap depending on your usage.
Rev AI vs Deepgram: which is better for call centers?+−
For call centers, the choice depends on your priorities. Rev AI includes speaker diarization at no added per-minute charge and supports 57 languages, making it well suited for multilingual contact centers. Deepgram offers a lower batch transcription rate ($0.003/min vs. $0.004/min), higher base concurrency (50 REST and 150 WebSocket connections), a self-host option, and HIPAA BAAs available without an enterprise contract, which may matter for healthcare contact centers.
Does Rev AI or Deepgram offer more concurrent streams on a base pay-as-you-go plan?+−
Deepgram allows up to 50 concurrent REST requests and 150 concurrent WebSocket requests on its pay-as-you-go plan. Rev AI limits base-plan users to 10 concurrent streams and 5 async multipart uploads. For teams that need high concurrency without a custom contract, Deepgram's base limits are substantially higher.
Is Rev AI or Deepgram better for HIPAA-compliant healthcare applications?+−
Deepgram offers a HIPAA BAA to all eligible customers. Rev AI makes its HIPAA BAA available at the enterprise tier only, meaning you may need to negotiate a contract before achieving compliance. Teams needing HIPAA coverage without an enterprise commitment may find Deepgram more accessible.
Rev AI vs Deepgram: which is better for multi-language transcription?+−
Rev AI supports 57 languages while Deepgram supports 50. Both tools offer automatic language detection, so either can identify the spoken language without you specifying it upfront. Rev AI has a slight edge in raw language count.
Does Rev AI or Deepgram include speaker diarization in the base price?+−
Rev AI includes speaker diarization in its standard offering, while Deepgram treats it as a paid add-on at $0.002 per audio minute on top of the base transcription rate. For teams that need diarization as a core requirement, Rev AI avoids that extra per-minute charge.
What free tier does Deepgram offer to new developers?+−
Deepgram provides $200 in credits with no expiration date and no credit card required when you sign up, letting developers test the API at scale before committing to a paid plan.
Does Deepgram support self-hosting or on-premises deployment?+−
Deepgram offers a self-host and on-premises deployment option, which is important for teams with strict data-residency requirements or air-gapped environments that cannot send audio to a cloud API.
Which tool has a lower third-party word error rate, Rev AI or Deepgram?+−
In third-party benchmarks, Deepgram recorded a 5.18% word error rate while Rev AI recorded a 5.92% word error rate. Deepgram's lower score indicates slightly better accuracy in that benchmark, though results can vary by audio type and domain.
Does Deepgram support PII redaction and what does it cost?+−
Deepgram offers PII redaction as a paid add-on at $0.002 per audio minute, billed on top of your base transcription rate. It is not bundled into any standard plan, so budget for the extra per-minute charge if you need personally identifiable information removed from your transcripts.
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When neither is right: weigh the rest of the Speech-to-text APIs field →
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