AI caption and subtitle generator that adds captions to videos in seconds with no watermark
Create viral short-form videos in seconds
Stage
Not given
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Founded
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Based in
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US
Pricing model
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Paid
Pricing
Free: 30 minutes of captions per month, 1080p MP4 export up to 3 minutes, 8 caption styles, SRT/VTT/TXT downloads up to 30 minutes, free translation into 100+ languages. Pro: $6.99/month (limited-time price, normally $9.99) or $59/year, unlimited captions on videos up to 90 minutes, all 22 caption s
Pro: $49/month (billed monthly) or $39/month (billed yearly). Visionary: $99/month (billed monthly) or $79/month (billed yearly). Titan: $499/month (billed monthly) or $399/month (billed yearly).
Key features
Automatic speech transcription in 100 languages with automatic language detection
SRT, VTT and TXT subtitle file downloads
Free translation into 100+ languages
Copy caption style from screenshot functionality
Bilingual captions showing two languages simultaneously on Pro
Video processing entirely in browser with audio-only server transmission for privacy
Word-level timing synchronization for precise caption timing
Customizable feed of successful channels from Instagram, TikTok, and YouTube
Find top-performing viral outlier videos in any niche
In-depth analysis of why videos went viral with hooks and storytelling frameworks
Instant transcript downloads from any video
AI-powered script writing using proven storytelling frameworks
Hook template generation with millions of validated views
Project organization to collect and manage winning video ideas
Monthly credits system for analyzing videos, writing scripts, and generating reports
Multiple workspace creation to organize content by niche
Personal analytics tracking and competitor monitoring
What makes it different
Fastest among 10 tested caption tools, 6.7× faster than CapCut and 4.7× faster than VEED
Highest accuracy with 5.7% word error rate in October 2026 accuracy test of 8 caption tools
Video stays entirely private with only audio sent for transcription
Analyzes millions of videos daily to find top 1% outliers in every niche
Data-backed storytelling frameworks based on billions of views
All-in-one platform combining research, analysis, and script generation
No social media account connection required to get value
Captions Generator
Sandcastles