Latest / The Indie Hacker Podcast with Fexingo: Solo Developers, SaaS Side Projects, and Independent Tech / How a Solo Dev Used a Simple Newsletter to Hit 10K MRR
Transcript
- Lucas: So you've probably heard the advice that every indie hacker should start a newsletter. Build an audience before you build a product. It's almost cliché at this point. Luna: Yeah, I've definitely heard that. But I've also heard the counter-argument — that newsletters are a distraction from actually building the thing that makes money. Lucas: Right. And I think both sides have a point. But today I want to talk about a solo dev who took the newsletter idea and turned it into the actual distribution engine for his SaaS. He didn't just use the newsletter to build an audience — he used it to acquire his first 1,000 paying customers. Luna: Okay, that's a specific number. Who is this person? Lucas: His name is Alex — I'm not using his last name because he prefers to stay low-profile — and he built a tool called Lettermatic. It's a SaaS for newsletter creators that helps with writing, formatting, and scheduling. Think of it as a lightweight CMS for email. Luna: So he's building a tool for newsletter people. And he used a newsletter to sell it. That's meta. Lucas: Very meta. And it worked. He hit 10K MRR in about 14 months, completely bootstrapped, no outside funding. And the newsletter was the primary acquisition channel — not ads, not SEO, not cold outreach. Luna: What was the newsletter about? Was it about his product, or something broader? Lucas: It was a newsletter about writing better emails. So it was adjacent to his product — not directly promotional, but deeply relevant. He wrote about subject lines, open rates, storytelling in email — all the stuff that his target audience cared about. And at the end of each issue, he'd include a subtle link to Lettermatic. Luna: Okay, so content marketing. That's not exactly a new playbook. What made it work so well for him? Lucas: Three things. First, he created a lead magnet that doubled as a product demo. It was a free checklist called 'The 10-Step Newsletter Launch Checklist.' People signed up for it, and the checklist itself was built inside Lettermatic — so as they went through the steps, they were actually using the product without realizing it. Luna: Oh, that's clever. So the onboarding was baked into the lead magnet. Lucas: Exactly. They'd tick off items, see how the editor worked, how the scheduling worked — and by the time they finished the checklist, they'd essentially completed a product tour. The conversion rate from checklist user to paid subscriber was something like 8 percent. Luna: That's a solid conversion. What was the second thing? Lucas: He built a referral program directly into the newsletter. Every subscriber had a unique referral link, and if they referred three people who also subscribed, they got a month of Lettermatic Pro for free. So he turned his subscribers into a distribution network. Luna: Did that actually drive signups, or was it just noise? Lucas: He tracked it meticulously. In the first six months, referrals accounted for about 30 percent of new subscribers. And because those referred subscribers already knew someone who used the product, their conversion to paid was higher — around 12 percent. Luna: So the referral program didn't just grow the list — it grew a higher quality list. Nice. Lucas: And the third thing was his pricing model. He structured Lettermatic so that the free plan was genuinely useful — you could send up to 500 emails per month, use basic templates, basic analytics. But the paid plan, which started at $19 a month, unlocked A/B testing, advanced segmentation, and custom branding. Luna: So the free plan was a real product, not just a trial. That probably helped with word of mouth too. Lucas: Absolutely. People who used the free plan and liked it would tell other newsletter creators. And because the free plan had no time limit, there was no pressure. He let the product sell itself. Luna: I want to come back to the numbers, but first — I'm curious about the timeline. How long did it take to get to 10K MRR? Lucas: He launched the newsletter in January 2025. At that point, Lettermatic was barely a prototype — just a basic editor and a CSV export. He started writing the newsletter three times a week, and within two months he had about 500 subscribers. Then he launched the checklist lead magnet, and that took him to 2,000 subscribers by month four. Luna: So the lead magnet was a growth lever. Lucas: Big one. By month six, he had 5,000 subscribers on the newsletter, and about 200 of them were paying for Lettermatic. That put him at roughly $3,800 MRR. Then he introduced the referral program, and that pushed the newsletter to 12,000 subscribers by month ten. MRR hit about $7,500. Luna: And the last stretch to 10K? Lucas: He added a few premium templates — things like onboarding sequences, re-engagement campaigns — and raised the price on the Pro plan from $19 to $29 for new subscribers. That, plus continued organic growth, got him to $10,200 MRR by month fourteen. Luna: So the newsletter was the engine, but the product improvements and pricing changes were the fuel. Lucas: Exactly. And I think the takeaway here isn't that every indie hacker needs a newsletter. It's that if you're building a product for a specific audience, you need to find a distribution channel that lets you demonstrate value repeatedly. A newsletter is one way to do that, because it's a recurring touchpoint. Luna: Right. It's not about the newsletter itself — it's about the context it creates. He wasn't just selling software; he was selling a better way to write emails, and the newsletter proved he knew what he was talking about. Lucas: That's the key insight. His newsletter wasn't a marketing channel — it was a living case study. Every issue was proof that he understood the problem. And the product was the natural extension of that expertise. Luna: I think a lot of solo devs underestimate how much credibility they can build just by sharing what they know. They think they need a big ad budget or a viral launch. But this story shows you can start small and compound. Lucas: Absolutely. And look — if today's episode gave you something useful, maybe a new way to think about distribution or the confidence to start that newsletter you've been considering — that's exactly the kind of value this podcast aims to deliver. And the way we keep these episodes ad-free and focused is listener support. If you'd like to help, you can buy me a coffee dot com slash fexingo. It's a simple way to say 'this was worth my time.' Luna: Yeah, and we really appreciate that. It's what lets us keep digging into stories like Alex's without any sponsor pressure. Lucas: So back to the practical side — one thing I think a lot of people miss is that Alex didn't try to build a massive audience. His newsletter never exceeded 15,000 subscribers, which is actually quite small by newsletter standards. But the conversion rate was high because the audience was so targeted. Luna: So it's not about size, it's about relevance. He was fishing in a small pond, but the fish were hungry. Lucas: Exactly. And I think that's an important lesson for solo devs. You don't need to reach millions of people. You need to reach the right 5,000 people. If even 10 percent of them become paying customers, that's $50K MRR at a $100 price point. Luna: That's a good way to frame it. So what would you say is the single biggest takeaway from Alex's story? Lucas: I'd say: build your distribution channel before you build your product — but make it a channel that naturally showcases the value of what you're building. Alex's newsletter wasn't about Lettermatic; it was about writing better emails. But every issue subtly demonstrated why you'd want a tool like Lettermatic. Luna: It's almost like product-led growth, but with content as the product. Lucas: Exactly. Content-led product-led growth. Or maybe we should call it 'value-first distribution.' Whatever you call it, it works. And it's especially suited for solo devs because it's low-cost, high-authenticity, and it compounds over time. Luna: One thing I'm curious about — did Alex ever consider selling the newsletter as a separate business? Some people build newsletters purely to flip them. Lucas: He did get offers. At one point, someone offered him $50,000 for the newsletter list alone. But he turned it down because he saw the newsletter as the moat for his SaaS. Without it, his customer acquisition cost would have skyrocketed. Luna: That makes sense. The newsletter wasn't just an asset — it was a strategic advantage. Lucas: Right. And I think that's a good note to end on. If you're a solo dev thinking about where to invest your time, consider building something that gives you a direct line to your ideal customers. A newsletter is one option. A YouTube channel could work. A podcast, even. The format matters less than the consistency and relevance. Luna: And start before you're ready. Alex had barely a prototype when he started the newsletter. He built in public, and the audience grew alongside the product. Lucas: Yeah. That's the indie hacker way, isn't it? Ship early, iterate, and let the market tell you what's valuable. Thanks for listening.