AssemblyAI
7.8#12 in ai transcription toolsFrom $0.15 a monthFree planWebAPISelf-hosted
VisitAssemblyAI vs Rev AI
What both publish
| Fact | AssemblyAI | Rev AI |
|---|---|---|
| API access | Yes | Yes |
| Compliance | AssemblyAI maintains an annually audited SOC 2 Type 2 report and conducts annual third-party penetration tests. | Rev lists CJIS, HIPAA and SOC 2 Type II compliance and provides a SOC 3 report for review. |
| Export formats | SRT,VTT | TXT,JSON,SRT,VTT |
| Free plan | No | No |
| Integrations | Official integrations include LiveKit, Pipecat, OpenRouter, Zapier, Make, n8n, Postman, Recall.ai, Zoom RTMS, Telnyx, Twilio, Amazon Connect, Genesys Cloud, LangChain, Vercel AI SDK, Power Automate, Semantic Kernel, Cloudflare, Bubble, Pipedream, and Drupal. | Rev lists integrations with YouTube, Vimeo, JW Player, Brightcove, Panopto, Zoom, Kaltura, Ensemble, WarpWire and Dropbox. |
| Language coverage | The platform states coverage across 99 languages and translation into 86 languages. | Rev advertises support for more than 57 languages, with capabilities varying by language. |
| Languages supported | 99 | 1 |
| Speaker identification | Yes | Yes |
| Timestamp support | Yes | Yes |
| What it does | AssemblyAI provides Voice AI models and APIs for speech-to-text, speech understanding, and voice applications. | Rev AI provides APIs for asynchronous and real-time speech-to-text transcription plus speech insights. |
AssemblyAI plans
- Free creditsFree
- Pay as you go — Universal-2$0.15 a month
- Pay as you go — Universal-3.5 Pro$0.21 a month
- Pay as you go — Universal-Streaming$0.15 a month
- Pay as you go — Universal-3.5 Pro Realtime$0.45 a month
- Free tierFree
Rev AI plans
- Whisper Fusion Transcription$0.01 a month
- Reverb turbo transcription—
- Language Translation - Standard ModelFree
- Language IdentificationFree
- Summarization StandardFree
- Sentiment AnalysisFree
Pick AssemblyAI if…
It suits developers building speech-to-text or voice applications who want API access, multiple speech-understanding features, or self-hosting. The available SDK guidance is relevant to Python and JavaScript developers.
Pick Rev AI if…
Rev AI suits developers integrating transcription, speaker labeling, timestamps, exports, or language services through an API. It also offers enterprise arrangements for volume-based use.