| What it does | REST API for converting MP4 videos and related formats programmatically
| Free, open-source video captions you control
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | Not given
| Not given
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| Pricing model | Freemium
| Freemium
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| Pricing | Free tier: 10 conversions/day, 10 MB files. Free Account: 20 conversions/day, 50 MB files. Premium: €9.99/mo (€95.99/year), unlimited conversions, 200 MB files, 60 req/min API. Premium Plus: €29.99/mo (€287.99/year), 1 GB files, 500 req/min API. API credits: 1,000 credits $12.00 one-off or $8.40/mo,
| Free app (1080p at 30 fps), Pro one-time purchase 14.99 €, self-hosting free
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| Key features | - Three-step async conversion process: submit, poll, download
- No SDK installation required, configure only with API key
- CPU-heavy format detection with 2-credit cost
- Rate limiting and quota management per minute and month
- Usage dashboard showing quota and consumption
- Automatic refund on rejected requests—no overage charges
- White-label outputs with no branding on Premium Plus
- Webhooks and batch API on Premium Plus
- API access with no credit cost for Premium Plus subscribers
| - Transcription with Whisper, Parakeet, or Apple Speech
- Word-by-word animated captions
- Caption styling and correction
- Export as MP4, WebM, ProRes, SRT, VTT or JSON
- iPhone app with on-device transcription
- Self-hosted Docker deployment
- HTTP API for scripts and pipelines
- Integration with Claude, Cursor and MCP clients
- Support for 13 interface languages
- GPU acceleration optional for faster transcription
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| What makes it different | - No SDK required—just HTTP client and API key
- Truly asynchronous conversion prevents long HTTP timeouts
- No overage charges—over-quota requests refused, not billed
- Multiple pricing options: one-off credits or monthly subscriptions
- Commercial license and resale rights included in Premium Plus
| - Open source with Rust engine shared across browser, app and server
- No uploads: iPhone app transcribes on device, self-hosted keeps videos local
- Free with one-time Pro purchase, no subscription required
- Run on your own server with Docker, no dependency on external services
- Agent integration for video captioning from Claude and other AI tools
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 14 ▼ −1 (down) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 12 | 0 |
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| Referring domains (Majestic) | 3 | 0 |
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mp4.now
OpenCaptions