How I Grew My SaaS to $13K MRR with Free Tools Marketing (Zero Paid Ads)
TL;DR: Banu, a builder from India, grew SiteGPT from idea to $13K MRR in under a year using a free tools marketing strategy. After quitting his corporate job and selling his first SaaS (Feather) for $250K, he launched SiteGPT in March 2023 during the AI chatbot wave. The product creates AI chatbots for websites and has generated $500K in total revenue. His core distribution strategy revolves around building approximately 50 free tools optimized for low-competition SEO keywords (difficulty <10, volume >1K searches/month). These tools generate 90% of his Google traffic - about 50,000 clicks monthly - converting to 300 leads with zero marketing spend. Each tool includes a CTA linking back to SiteGPT. With AI coding tools like Cursor, he can now build new tools in under 5 minutes by reusing existing patterns. The business has exceptional unit economics: 50K visitors → 200 leads → 60 trials → 15-24 customers (25-40% trial conversion), with $100 ARPU and $1,700-$1,800 LTV indicating 17-18 month average customer lifespan. His 7-step process for identifying tool opportunities involves keyword research in Ahrefs, filtering by difficulty and volume, planning CTAs, and prioritizing based on relevance to the main product.
Key Insights
- Free tools marketing drives 50K monthly clicks and 300 leads with zero ad spend - 90% of Google traffic comes from ~50 SEO-optimized tools
- AI coding tools enable 5-minute tool creation by reusing patterns, making it sustainable to build dozens of distribution assets
- Systematic keyword research (KD<10, volume>1K) identifies low-competition opportunities that any decent website can rank for
- Exceptional unit economics with $1,700-$1,800 LTV on $100 ARPU indicates 17-18 month retention
- Launched in 2 weeks, hit $10K MRR in first month by riding AI chatbot wave in March 2023
Actionable Takeaways
- Use Ahrefs keyword explorer with blank search + filters (KD<10, volume>1K) to find low-competition tool opportunities
- Ensure every free tool has a clear CTA connecting tool usage to main product (e.g., 'You tried X with one file, what if you could do Y with all your content?')
- Build a prioritization matrix ranking keywords by: search volume, difficulty, build effort, and product relevance
- Use AI coding assistants to template new tools in minutes by referencing existing tool patterns
- Target 1,000+ monthly search volume minimum to ensure each tool generates meaningful traffic