Side by side
Captioner.io vs SubStudio
Compare what each tool does, what it costs, and how it fits your workflow.
Designed for
Add accurate, multilingual subtitles to videos - fast, right in your browser.
Caption your videos, fast.
Primary task
Video captions
Video captions
Pricing
Free Trial · Trial; then from $5/mo
Free
Pricing details
Free + from $5/mo
Free
Billing cycle
Monthly
Not documented
API access
Not documented
Not documented
Platforms
Web
Web
Integrations
Not documented
Not documented
Source rating
5.0 / 5 · 2 ratings
5.0 / 5 · 1 ratings
Catalog views
26k
444
Estimated monthly traffic
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—
Catalog imported
30 Aug 2026
8 Sep 2026
Listed strengths
- High accuracy (98% )
- Supports 98 languages
- Word-level timestamps
- Precise subtitle alignment
- Import and auto-sync transcripts
- Automated captioning service
- Fast text conversion
- Useful for content creators
- Beneficial for digital marketers
- Applicable for educational institutions
Listed limitations
- Translation options are limited
- MP4/MOV uploads only
- 2GB file size cap
- Not the fastest transcriber
- Watermark on free renders
- Language support unspecified
- Accuracy level unknown
- Customization features not clear
- Potentially lacks API
- No details on speed