Latest / The Indie Hacker Podcast with Fexingo: Solo Developers, SaaS Side Projects, and Independent Tech / How a Solo Dev Built a SaaS From One Reddit Post
Transcript
- Lucas: So there's this Reddit post from about six months ago — r/freelance, someone asking, 'Is there a tool that automatically follows up on late invoices without me having to nag clients?' Luna: Classic freelancer pain point. I've been there myself. Lucas: Right. And a solo dev named Mike — no previous SaaS experience — saw that post, replied with a link to a landing page he built in an hour on Carrd. Said, 'I'm building this, drop your email if you want early access.' He got 300 signups overnight. Luna: Wait — he built the landing page before he had any code written? Lucas: Exactly. He validated the idea entirely from that single Reddit comment. No blog, no ads, no Twitter following. He spent the next weekend building an MVP using Bolt.new and Stripe — connected Stripe to send payment links, automated reminder emails via a cron job. Launched two weeks later for a flat $9 a month. Luna: And how many customers did he get from that initial Reddit thread? Lucas: About 50 in the first month. Enough to hit $450 MRR. But the real growth came because the original post kept getting shared — other freelancers reposted it on LinkedIn and Twitter. By month three, he was at $3,200 MRR. Luna: So he basically rode a single Reddit post for months. That's lucky, but also smart — he made sure the tool actually solved the problem. Lucas: That's the key. Mike told me he spent the first two weeks just messaging every signup personally, asking what they needed. He added a 'send a polite reminder' button and a dashboard showing payment status. All features requested by those first users. Luna: So he turned the Reddit validation into a feedback loop. That's harder than it sounds. Lucas: Right. Most people stop at the landing page. He actually built and iterated fast. Now he's at $8,000 MRR with 200 paying customers. No paid marketing at all. Luna: But that raises a question — is this repeatable? How many Reddit posts can actually spawn a profitable SaaS? Lucas: It's not about the Reddit post itself. It's about finding a community with an unmet need and being the first to build for it. Mike's case works because r/freelance is huge — over a million members — and the problem was universally understood. Luna: Still, relying on one thread feels fragile. What if Reddit changes its algorithm or the post gets buried? Lucas: That's exactly what Mike is dealing with now. His organic Reddit traffic has dropped by about 60% in the last two months. So he's shifting to content marketing — writing about invoice automation for freelancer blogs and starting a YouTube channel. Luna: Smart. Diversify before the well runs dry. Lucas: And the interesting thing is, his retention is solid. month to month churn is under 4%. So even if new signups slow, the base revenue is sticky. Luna: I think that's the real lesson here: Reddit can give you a launchpad, but you still need product-market fit to stick around. Lucas: Exactly. And honestly, if today's conversation gave you something usable — maybe a nudge to go find your own Reddit thread — that's worth a coffee. If it was, the link is buy me a coffee dot com slash fexingo. No pressure, just helps keep the show ad-free. Luna: Yeah, totally fair. It's what lets us dive deep into stories like Mike's without selling out to sponsors. Lucas: Alright — back to the strategy. So for anyone listening who wants to try this: first, find a subreddit where people are complaining about a specific, repeatable pain. Not 'I wish there was an app for that' — but 'I spend three hours a week doing this manually.' Luna: What's the best way to validate without building? Lucas: Mike's method works: post a reply saying you're building a solution, link to a simple waitlist. See how many signups you get in 48 hours. If it's below 50, the idea might be too niche. Luna: And if it's above 50? Lucas: Build the absolute smallest version. Mike used Bolt.new to connect Stripe and send automated emails — total code maybe 200 lines. He didn't even have a proper domain at first, just a subdomain. Luna: What about pricing? He went with $9 a month flat. Is that the sweet spot? Lucas: For a micro-SaaS targeting freelancers, yes. Freelancers are price-sensitive but willing to pay for time savings. Mike tested $7 and $12 — $9 converted best. Also, he made the first month free to reduce friction. Luna: That's a good hook for Reddit — 'Try it free for a month, no credit card.' Lucas: Exactly. That was actually one of the top comments on his original post. People loved that there was no risk. Luna: So what's next for Mike? Is he going full-time on this? Lucas: He's thinking about it. He still works a day job as a backend developer. But at $8K MRR, he's close to replacing his salary. He told me if he hits $12K by September, he'll quit. Luna: That's the dream, right? A side project that turns into a full-time income. Lucas: It is. But it's also a cautionary tale — he's now realizing that building the product was the easy part. Growing beyond the initial launch is the real challenge. Luna: I've seen other devs try the Reddit approach and fail because they didn't engage the community after the first post. Mike stayed active, answered questions, posted updates. Lucas: Right. He even created a subreddit for his tool and cross-posted feature requests. That built a loyal user base that evangelized for him. Luna: So the Reddit strategy isn't just about one post — it's about becoming a useful member of the community over time. Lucas: Exactly. And that's replicable. Any solo dev can find a niche subreddit, listen to the pain points, and build a targeted solution. The barrier has never been lower. Luna: I'm curious — are there other communities besides Reddit where this works? Lucas: Absolutely. Hacker News 'Show HN' posts work well for dev tools. Indie Hackers itself is a goldmine. Even Stack Overflow — if you see a recurring question about 'is there a tool that does X?' — that's a signal. Luna: So the key is finding the pain in plain sight. Lucas: Yeah. The internet is full of people complaining. The solo dev's job is to spot the complaints that enough people share — and then build the simplest fix. Luna: Mike's story proves you don't need a co-founder, a big budget, or even a marketing plan. Just a Reddit account and a weekend. Lucas: And the willingness to actually talk to your users. That's the part most people skip. Luna: Alright, I'm convinced. I might go lurk on some subreddits tonight. Lucas: Do it. And if you find something, let us know — maybe we'll cover it in a future episode.