MultiSub — AI-Powered Subtitle Platform
Building a SaaS from zero to 3,000+ users
role: Founder & Solo Developeryear: 2024duration: 6 months
Next.jsTypeScriptOpenAI WhisperStripePostgreSQLVercel
3,000+
Users
50+
Languages
99.2%
Uptime
>Problem
Content creators needed affordable, accurate subtitle generation in multiple languages. Existing solutions were expensive and had poor quality for non-English content.
>Approach
- >Built MVP in 2 weeks with Next.js and OpenAI Whisper API
- >Implemented Stripe billing with free tier to drive adoption
- >Added multi-language support for 50+ languages
- >Optimized for long-form content with chunked processing
>Results
- >3,000+ registered users in first 3 months
- >99.2% uptime since launch
- >4.8/5 average user satisfaction
- >Profitable within 2 months
>Learnings
- >Ship fast, iterate faster — the MVP approach validated demand quickly
- >Free tier is essential for SaaS discovery
- >Error handling for AI APIs needs extra attention