Zero to $26K MRR as solo founder of Rails Autoscale

Executive overview

Adam McCrea built Rails Autoscale from a side project to $26K MRR as a solo founder without employees, leveraging Heroku's marketplace to reach customers organically. The product solves a real problem that Heroku's free autoscaler doesn't address well—it provides a safety net for Rails apps to handle traffic spikes reliably. Growing a bootstrapped SaaS slowly but sustainably beats burning out chasing unrealistic timelines.

The origin story: side project becomes business

• Started in 2016 as a solution to a real problem at his company—they were overpaying for server capacity on Heroku because their app only ran during business hours
• Tried existing autoscalers on the market; they were unreliable and frustrating
• Got informal approval from his team to build it as a side project
• Launched into Heroku's alpha phase in January 2017, but didn't get to general availability (when he could charge) until December 2017—a painful 11-month wait
• Took him almost a year partly because he did minimal marketing; other founders have reached general availability in just a couple months
• Didn't get explicit IP ownership in writing initially; only formalized it retroactively when his original company was acquired

Growth trajectory and timing

• 2017–2019: slow, steady growth while working a day job
• 2020: explosive growth—started the year at less than 5K MRR, ended over 15K MRR
• Applied to Tiny Seed in late 2020 while still employed; needed the financial cushion because his wife was in school and family was risk-averse
• Now at 26K MRR with 500 customers, still solo
• Heroku's free autoscaler launched in 2017 or 2018—a scary moment that he thought would cut his business in half, but it didn't affect revenue because Heroku's solution doesn't work reliably for most users

Balancing day job and side project

• Worked nights and weekends for years; compared it to paying the price of admission for eventual freedom
• Key to survival was patience—he viewed it as a marathon, not a sprint, and didn't push himself to burnout
• By 2018–2020, he wasn't putting much energy into Rails Autoscale because the product was working and growing slowly on its own through the marketplace
• Only got a day job when growth started accelerating and he needed mental energy to make strategic improvements

Platform risk and business evolution

• Rails Autoscale is a classic "step one" business in Rob Walling's stair-step approach—single marketing channel (Heroku marketplace), recurring SaaS revenue, minimal expenses, single founder
• Main vulnerabilities: entirely dependent on Heroku, entirely dependent on Rails language adoption, vulnerable to future competitive moves or platform changes
• Exploring two paths to reduce risk: expand beyond Rails (Node, Python) or beyond Heroku (AWS), both while talking to existing customers
• Wants to grow the business bigger, not for billion-dollar ambitions, but to build a cushion against sudden disruption or job market re-entry

Freemium launch and customer psychology shift

• Switched from seven-day free trial to freemium (perpetual free plan with limited autoscales—20 per month) one week before this interview
• Original hypothesis: autoscaling saves costs. Reality from customer interviews: most people value Rails Autoscale for peace of mind and safety, not cost savings
• Freemium strategy: make safety net default for every Rails app on Heroku, not just something developers discover when they hit a crisis
• Marketing logic: "owning the lead"—free users already have accounts and logins, lowering friction to convert later when they need the full feature set
• Early data: no customer downgrades to free, many new free signups, paid subscription trajectory unchanged