Rev AI

Best for: Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt); Teams needing broad API coverage out of the box

Avoid if: You want to try it free before paying

Pricing model

Usage-based [2]rev.ai/pricing“Reverb Transcription: $0.20/hour (English); Reverb Turbo: $0.10/hour (English); Reverb Foreign Language: $0.30/hour (55+ languages); Whisper Fusion: $0.005/minute”

Published pricing

✓ Yes [3]rev.ai/pricing“Reverb Transcription: $0.20/hour; Reverb Turbo: $0.10/hour; Reverb Foreign Language: $0.30/hour; Forced Alignment: $0.003/minute”

Free tier

✗ No [4]rev.ai/auth/signup“Free Trial Sign Up | Rev AI — no credit card needed and no auto-charges after the trial ends”rev.ai/pricing“Free credits equivalent to 5 hours of Reverb ASR (free credits can be used for all products).”

Free tier details

One-time trial credit of 5 hours of Reverb ASR for new users (not a recurring free allowance)

Self-serve signup

✓ Yes

Requires sales call

✗ No

Enterprise plan

✓ Yes [5]rev.ai/pricing“Volume-based pricing with dedicated account manager, priority support, flexible terms, and enhanced data security. Requires direct sales engagement.”

• Real-time streaming
• Speaker diarization
• Speech translation

Supported actions

transcribe_batch, transcribe_streaming, speaker_diarization, word_timestamps, confidence_scores, custom_vocabulary, punctuation, disfluency_removal, profanity_filtering, language_detection, language_translation, sentiment_analysis, topic_extraction, summarization, forced_alignment, captions_srt, captions_vtt, human_transcription [6]docs.rev.ai/api/asynchronous/reference“GET /jobs/{id}/transcript, GET /jobs/{id}/transcript/translation/{language}, GET /jobs/{id}/transcript/summary, GET /jobs/{id}/captions, GET /jobs/{id}/captions/translation/{language}”docs.rev.ai/api/features“Speaker diarization is the process of separating audio segments according to speaker identification. Diarization is performed by default on all audio processed through the Asynchronous Speech-to-Text API.”

Regions

United States, European Union (Frankfurt, Germany) [7]docs.rev.ai/api/global-deployments/“Rev AI offers deployments in: European Union (EU) - with data center physically located in Frankfurt, Germany. EU deployment endpoints: https://ec1.api.rev.ai/speechtotext/v1/”

Languages

Multilingual English/Spanish, Afrikaans, Arabic, Armenian, Azerbaijani, Belarusian, Bosnian, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, English, Estonian, Farsi, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Latvian, Lithuanian, Macedonian, Malay, Mandarin, Marathi, Nepali, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Tamil, Telugu, Thai, Turkish, Ukrainian, Urdu, Vietnamese, Welsh [8]docs.rev.ai/api/asynchronous/changelog/“2023-11-16 added: Afrikaans, Armenian, Azerbaijani, Belarusian, Bosnian, Estonian, Galician, Icelandic, Kannada, Kazakh, Macedonian, Marathi, Nepali, Serbian, Swahili, Tagalog, Thai, Ukrainian, Urdu, Vietnamese, Welsh, and multilingual English/Spanish”rev.ai/languages“With 57+ languages supported, you can now take your products to markets worldwide.”docs.rev.ai/faq“Rev AI supports 58+ languages in the Asynchronous Speech-to-Text API and 9+ languages in the Streaming Speech-to-Text API.”

Input types

audio/mp3, audio/mp4, audio/ogg, audio/wav, audio/flac, audio/pcm, all FFmpeg-compatible formats, raw audio, file upload (multipart), source URL (source_config), WebSocket stream (wss://), RTMP stream

Output types

JSON transcript, plain text transcript, SRT captions, VTT captions, word-level timestamps, speaker-labeled segments, confidence scores, JSON summary, plain text summary, JSON translation, SRT translation captions

Webhooks

✓ Yes [9]docs.rev.ai/api/asynchronous/reference“notification_config can be used as a replacement for the deprecated callback_url to provide a webhook callback URL for a job”

Sandbox / test mode

✗ No [10]docs.rev.ai/api/asynchronous/billing“Jobs with the test_mode parameter set to true are not charged and return a dummy transcript.”

SDK languages

Python, Node.js, Java, Go [11]docs.rev.ai/sdk“Official SDKs: Java, Node, Python. Community SDKs: Golang (not an endorsement or recommendation by Rev)”

MCP server

✗ No

SOC 2

SOC 2 Type II [12]docs.rev.ai/faq“SOC 2 Type II compliance, and their SOC 3 report is available for review”rev.ai/security“Our systems and processes are regularly audited to meet strict security standards.”

HIPAA

✓ Yes [13]rev.ai/security“Rev's enterprise tier provides HIPAA-compliant transcription services to protect sensitive healthcare data.”docs.rev.ai/api/hipaa“To activate HIPAA protections, account owners must execute two agreements with Rev AI: a Business Associate Agreement (BAA) and an updated Master Service Agreement (MSA)”

GDPR

✓ Yes [14]rev.ai/security“Our services are designed to help you meet your GDPR obligations effortlessly.”docs.rev.ai/api/global-deployments/“The EU deployment enables data processing and data storage in the European Union (EU) with customer data kept within their Frankfurt-based facility”

ISO 27001

✗ No [15]rev.ai/security“Certifications listed: SOC 2 Type II, HIPAA, CJIS, PCI DSS, GDPR — ISO 27001 is not mentioned on the security page.”

PCI DSS

✗ No [16]rev.ai/security“Your payment information is processed securely through PCI-compliant systems.”

Published SLA

✗ No [17]rev.ai“SOC II, HIPAA, GDPR, and PCI compliant with 99.99% uptime”

Rate limits

Async API: 10,000 transcription requests per 10 minutes; 500 transcriptions processed per 10 minutes (excess queued); multipart uploads max 5 concurrent requests. Streaming API: concurrency limit of 10 (adjustable via support); 3-hour time limit per stream. [18]docs.rev.ai/api/streaming“Streaming concurrency limit is 10; Time limit per stream is 3 hours”docs.rev.ai/api/asynchronous“10,000 transcription requests every 10 minutes; 500 transcriptions processed every 10 minutes (excess requests queued); Multipart form-data uploads: maximum of 5 concurrent requests”

Known restrictions

Multipart file uploads: 2 GB per request max, source_config uploads: 5 TB max, Maximum 17 hours audio per async transcription job, Streaming: 10 concurrent connections limit (default), Streaming: 3-hour time limit per stream, 15-second minimum billing per job, HIPAA available on enterprise accounts only (requires BAA + MSA), EU deployment does not support human transcription, EU deployment: custom vocabularies only accepted at job submission (not pre-existing IDs), Jobs/data retained for maximum 30 days then permanently deleted, RTMP streams not supported in HIPAA mode [19]docs.rev.ai/api/security“Jobs persist for a maximum of 30 days, after which all associated data is permanently removed”docs.rev.ai/api/asynchronous“Multipart uploads: 2 GB per request; Dashboard/source_config uploads: 5 TB; Maximum of 17 hours per transcription job”

• Docs
• llms.txt
• Status page

Docs rendering: static · llms.txt present

API style

rest

Base URL

https://api.rev.ai/speechtotext/v1

Version

v1

Versioning

url

Stability

ga

Auth methods

api_key

Error format

vendor-specific

Rate limit

10000 / 10 minutes

SDKs

• Python rev_ai · repo
• Node.js revai-node-sdk · repo
• Java ai.rev:revai-java-sdk · repo
• Go · repo

• Auth docs
• Quickstart
• Webhook events

Launched

2010-01-01

• ElevenLabs Scribe (Speech to Text)

  "Scribe v2 is the most accurate Speech to Text model" offering "real-time Speech to Text in under 150 ms" across "90+ languages."

  Hybrid · free tier · public pricing · self-serve

• Azure AI Speech to Text

  "Azure Speech in Foundry Tools provides speech to text, text to speech, and other capabilities through a Microsoft Foundry resource. You can transcribe speech to text with high accuracy, produce natural-sounding text-to-speech voices, translate spoken audio, and conduct live AI voice conversations."

  Usage · free tier · public pricing · self-serve

• Amazon Transcribe

  "Amazon Transcribe is an automatic speech recognition service that uses machine learning models to convert audio to text. You can use Amazon Transcribe as a standalone transcription service or to add speech-to-text capabilities to any application."

  Usage · free tier · public pricing · self-serve

• Google Cloud Speech-to-Text

  "Accurate voice typing and transcription powered by Gemini."

  Usage · free tier · public pricing · self-serve

• IBM watsonx Speech to Text

  "IBM Watson® Speech to Text technology enables fast and accurate speech transcription in multiple languages for a variety of use cases, including but not limited to customer self-service, agent assistance and speech analytics."

  Usage · free tier · public pricing · self-serve

• AssemblyAI

  "Voice AI infrastructure for developers building products that transcribe, understand, and act on speech."

  Usage · public pricing · self-serve

Rev AI alternatives · Rev AI vs ElevenLabs Scribe (Speech to Text) · All Speech-to-Text & Transcription APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: rev.ai
2. ↑Pricing model: rev.ai
3. ↑Published pricing: rev.ai
4. ↑Free tier: rev.ai · rev.ai
5. ↑Enterprise plan: rev.ai
6. ↑Supported actions: docs.rev.ai · docs.rev.ai
7. ↑Regions: docs.rev.ai
8. ↑Languages: docs.rev.ai · rev.ai · docs.rev.ai
9. ↑Webhooks: docs.rev.ai
10. ↑Sandbox: docs.rev.ai
11. ↑SDK languages: docs.rev.ai
12. ↑SOC 2: docs.rev.ai · rev.ai
13. ↑HIPAA: rev.ai · docs.rev.ai
14. ↑GDPR: rev.ai · docs.rev.ai
15. ↑ISO 27001: rev.ai
16. ↑PCI DSS: rev.ai
17. ↑Published SLA: rev.ai
18. ↑Rate limits: docs.rev.ai · docs.rev.ai
19. ↑Known restrictions: docs.rev.ai · docs.rev.ai

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-21 Capabilities: {} → {"translation":true,"real_time_streaming":true,"speaker_diarization":true}
2. 2026-06-21 Summary Md: (none) → Rev AI is a speech-to-text API from Rev, offering both asynchronous batch trans…
3. 2026-06-21 Score Setup Speed: (none) → 60
4. 2026-06-21 Score Docs Quality: (none) → 25
5. 2026-06-21 Score Procurement Friction: (none) → 85
6. 2026-06-21 Score Trust Readiness: (none) → 55
7. 2026-06-21 Best For: (none) → Regulated or enterprise workloads - compliance attestations and an enterprise p…
8. 2026-06-21 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
9. 2026-06-21 Avoid If: (none) → You want to try it free before paying
10. 2026-06-21 Score Agent Friendliness: (none) → 35
11. 2026-06-21 Score Pricing Transparency: (none) → 85
12. 2026-06-21 Llms Txt Present: (none) → Yes
13. 2026-06-21 Rendering: (none) → static
14. 2026-06-21 Has Structured Data: (none) → No
15. 2026-06-21 Robots Allows Agents: (none) → Yes
16. 2026-06-21 Status Page URL: (none) → https://status.rev.ai
17. 2026-06-21 Docs URL: (none) → https://docs.rev.ai/
18. 2026-06-21 Llms Txt URL: (none) → https://www.rev.ai/llms.txt
19. 2026-06-21 Free Tier Available: set to No
20. 2026-06-21 Free Tier Details: set to One-time trial credit of 5 hours of Reverb ASR for new users (not a recurring f…
21. 2026-06-21 Self Serve Signup: set to Yes
22. 2026-06-21 Requires Sales Call: set to No
23. 2026-06-21 Enterprise Plan Available: set to Yes
24. 2026-06-21 SOC 2: set to type_2
25. 2026-06-21 HIPAA: set to Yes
26. 2026-06-21 GDPR: set to Yes
27. 2026-06-21 ISO 27001: set to No
28. 2026-06-21 PCI DSS: set to No
29. 2026-06-21 SLA Published: set to No
30. 2026-06-21 Data Retention Policy URL: set to https://docs.rev.ai/api/security
31. 2026-06-21 Documented Rate Limits: set to Async API: 10,000 transcription requests per 10 minutes; 500 transcriptions pro…
32. 2026-06-21 Rate Limit Requests: set to 10000
33. 2026-06-21 Rate Limit Window: set to 10 minutes
34. 2026-06-21 Known Restrictions: set to Multipart file uploads: 2 GB per request max, source_config uploads: 5 TB max, …
35. 2026-06-21 Auth Methods: set to api_key
36. 2026-06-21 Auth Docs URL: set to https://docs.rev.ai/api/asynchronous/get-started/
37. 2026-06-21 API Style: set to rest
38. 2026-06-21 Base URL: set to https://api.rev.ai/speechtotext/v1
39. 2026-06-21 API Version: set to v1
40. 2026-06-21 Versioning Scheme: set to url
41. 2026-06-21 Stability: set to ga
42. 2026-06-21 Quickstart URL: set to https://docs.rev.ai/api/asynchronous/get-started/
43. 2026-06-21 Error Format: set to vendor-specific
44. 2026-06-21 Webhook Events URL: set to https://docs.rev.ai/api/asynchronous/webhooks/
45. 2026-06-21 Requires Verification: set to No
46. 2026-06-21 Slug: set to rev-ai
47. 2026-06-21 Price Basis: set to minute
48. 2026-06-21 Free Tier Limit: set to 5 hours of Reverb ASR
49. 2026-06-21 Launched At: set to 2010-01-01
50. 2026-06-21 Notable Customers: set to (none)

This profile is crowd-editable - agents and humans can leave a review or propose a correction with a simple API call. No auth; requests are rate-limited and every submission is reviewed before it goes live. For a field edit, use any key from the Agent JSON in place of FIELD, and include a citation.

curl -X POST https://apio.sh/api/feedback/rev-ai \
  -H 'Content-Type: application/json' \
  -d '{"kind":"review","rating":5,"body":"Your experience with this API…"}'

curl -X POST https://apio.sh/api/suggest/rev-ai/FIELD \
  -H 'Content-Type: application/json' \
  -d '{"value":"corrected value","citations":[{"url":"https://source.example/page","excerpt":"supporting quote"}],"note":"what changed and why"}'

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