$14K MRR - The X Growth Tool Built in Public
What SuperX Does
SuperX is a Chrome extension that gives X (Twitter) creators superpowers. It combines the most powerful analytics engine with AI writing tools, a smart tweet scheduler, and a unique algorithm simulator - all accessible without leaving your timeline. The tool learns your writing voice and helps you create content that resonates, while providing real-time insights into what's working and what isn't.
The Problem It Solves
Growing on X is hard. Creators spend hours crafting posts with no idea if they'll perform. They switch between multiple tools for analytics, scheduling, and content ideas. And most AI writing tools produce generic content that sounds nothing like them. SuperX solves all three problems in one lightweight extension - giving creators deep insights, optimal posting times, and AI that actually writes in their voice.
Watch: SuperX Starter Story - How Rob Built a $14K MRR SaaS
The Growth Story
Rob Hallam's journey to building SuperX started with a setback. Caught up in the 2023 tech layoffs, he made a bold decision: leave everything behind and build something of his own. In January 2025, sitting at Amsterdam airport with a 12-hour flight to Rio ahead, he posted his goal publicly on X - "Build a $10k/month SaaS and document the process."
What followed was 10 months of relentless building while traveling the world. Rob ran a closed private beta for 6 months, refining the product based on real user feedback before launching publicly. His strategy was unconventional: no marketing budget, no ads, just building something so good it would sell itself.
By May 2025, SuperX hit $1K MRR with just the Chrome extension. But the journey wasn't smooth. Shortly after, Rob was hospitalized with stress-induced neck spasms - the physical toll of pushing too hard at $2K MRR. Rather than quit, he learned to detach from outcomes, checking results hours or days later instead of obsessively monitoring.
The results speak for themselves. From that low point, SuperX achieved 6x growth. Travis Fischer, a well-known indie hacker, noted that Rob "has been killing it on X" and is on "an insane growth trajectory." The product now serves over 5,000 creators and generates $14K MRR - all bootstrapped, all solo.
From the Founder
Key Growth Tactics
Building in public was SuperX's entire marketing strategy. Rob shared everything - screenshots of new features, screen recordings of the product in action, his wins, his failures, and his journey as a nomadic founder. As he puts it: "Focus on your personal brand, then your product will sell itself. Figure out what makes you unique and start posting about it."
The 10% rule for content: Only 10% of Rob's posts are about selling SuperX. The rest is genuine content about building, traveling, and the indie hacker life. "People don't like being sold to, but they do like supporting someone they believe in."
The product is the moat. SuperX's "Social Hub" feature pairs users with 10 similar creators based on follower count and interests, creating a network effect. The AI learns each user's voice through an interactive thumbs up/down system. And the algorithm simulator lets you A/B test tweets before posting - features competitors don't have.
Key Takeaways for Builders
- ✓Build in public: Rob grew SuperX by sharing his journey, screenshots, and wins/losses on X - his personal brand drove product sales
- ✓Run a private beta: 6 months of closed beta before launch helped refine the product and build anticipation
- ✓Focus on product, not marketing: "We don't do any marketing - we're building something so good it sells itself"
- ✓Solve your own problem: Rob built the analytics and AI writing tools he wished existed for growing on X
- ✓Detach from outcomes: Check results hours later, not obsessively - focus on the work and results follow