Latest / Solopreneur Sessions with Fexingo: One-Person Businesses, Freelancing, and Independent Work / How a Solopreneur Built a Business on One Substack Newsletter
Transcript
- Lucas: So there's this writer I've been following — name's Alex — who started a Substack newsletter in early 2025, focusing on supply chain software. Not exactly a sexy topic, but by the end of 2026, he's got 15,000 paid subscribers and a six-figure annual revenue. Alone. No team. Luna: Wait — 15,000 paid subscribers? That's not a newsletter, that's a media company. Lucas: Right. And the interesting part is how he got there. He didn't have a big audience, didn't spend on ads. He picked one B2B niche, wrote deep analysis, and used a single LinkedIn post to kickstart everything. Luna: Let me guess — the post went viral in supply chain circles? Lucas: Exactly. He wrote a detailed breakdown of why a major retailer's inventory system kept failing during peak seasons. Tagged a few supply chain VPs. The post got shared in industry Slack groups, and within a week, he had 5,000 free subscribers. Then he offered a paid tier at eight dollars a month for weekly deep dives. Luna: Eight dollars — so that's about $96 a year per subscriber. Even with a 5 percent conversion rate, that math starts to look really interesting. Lucas: Right. And his conversion rate was actually higher because the niche was so specific. If you work in supply chain software, you'll pay for analysis that saves you time. So he ended up converting about 8 percent of his free list to paid within three months. Luna: That's about 400 paid subscribers from that first viral wave. At eight bucks a month, that's $3,200 monthly recurring revenue from one post. Lucas: But he didn't stop there. He kept growing by guest-posting on other newsletters — not to sell his own, but to build authority. He'd write a guest post for a logistics blog, include a link to a free sample of his Substack, and get a steady 200 to 300 new subscribers per guest post. Luna: So he's trading his expertise for distribution. That's smart, but time-consuming. How does one person write all that content? Lucas: That's where the automation comes in. He started using an AI editing tool to clean up guest posts and repurpose his own content. He'd record a voice memo of his thoughts, have the AI turn it into a draft, then spend 30 minutes polishing. That cut his writing time per post from three hours to about 45 minutes. Luna: So he's not using AI to write for him — he's using it to handle the grunt work of editing and structuring. That feels sustainable. Lucas: Exactly. He told me the key was to keep his voice in the final product. The AI just helped with the scaffolding. He also set up a simple system: every Monday, he publishes a free post; every Thursday, a paid deep dive. Same schedule, every week. No exceptions. Luna: Consistency builds trust. And trust builds conversions. But let's talk about the economics — 15,000 paid subscribers at $8 a month is $1.2 million a year. That's a big number. Lucas: It is. But remember, not all 15,000 are paying the full $8. Some are on annual plans at a discount, some churn. He estimates his effective monthly revenue per paid subscriber is about $7.50. So annual recurring revenue is around $1.35 million. Substack takes a 10 percent cut, so net is about $1.2 million. Luna: For a one-person business, that's incredible. But what's the catch? Burnout? Lucas: He almost burned out in month 10. He was writing four posts a week, answering comments, and doing one-on-one consulting on the side. So he dropped consulting entirely, raised his subscription price to $10 for new subscribers, and used the extra revenue to hire a part-time editor. That editor does fact-checking and light copyediting, but the writing is still all Alex. Luna: So he's still a solopreneur, but with one contractor. That's a repeatable model — start alone, automate the non-creative stuff, then outsource when revenue justifies it. Lucas: And the beauty is the niche protects him. Supply chain software isn't a crowded newsletter space. He's become the go-to analyst for that industry. Companies subscribe their whole teams, which gives him enterprise accounts worth $500 a month or more. Luna: Okay, so what's the actionable takeaway for someone listening who wants to try this? Not everyone can write about supply chain. Lucas: Pick a niche where professionals will pay to save time. Not a broad topic like 'marketing' or 'investing' — that's too competitive. Something like 'CRM integrations for real estate agents' or 'medical coding updates for small practices'. The narrower, the better. Then use one piece of content that can go viral in that niche — a LinkedIn post, a Twitter thread, a guest post on a niche blog. Luna: And once you have that initial base, the key is to deliver value consistently and charge a reasonable price. Eight to ten dollars a month seems to be the sweet spot. Lucas: Yeah. And don't be afraid to raise prices later. Alex's original subscribers are grandfathered at $8, but new ones pay $10. That's a 25 percent increase, and his churn barely budged. Luna: I also love that he used AI not to replace himself, but to protect his time. That's a lesson for any solopreneur. Lucas: If today was actually useful to you — maybe you're thinking about starting a newsletter, or you're already writing and want to monetize — the way this show stays ad-free is listener support. If you'd like to help keep these conversations going, you can find us at buy me a coffee dot com slash fexingo. No pressure, just a simple way to say this matters. Luna: Exactly. We love making these episodes, and knowing they help people makes it worth it. So if today's episode moved your work forward in some small way, that link is there. Lucas: Alright — back to Alex. One thing I think is underrated: he does a quarterly survey asking subscribers what topics they want covered. That's how he knows his content stays relevant. And it gives him a backlog of ideas, so he never has writer's block. Luna: That's smart. It's like co-creating with your audience. And it probably makes them feel invested in the newsletter. Lucas: Exactly. And the results speak for themselves. He's now at 15,000 paid subscribers, and he's planning to launch a paid Slack community for an extra $20 a month. That could double his revenue without writing more. Luna: So the newsletter becomes the top of funnel for a community. That's a classic product ladder. Lucas: Right. And he's doing it all from a one-bedroom apartment in Austin. No office, no employees, just a laptop and a niche. Luna: It's a great example of how specificity beats scale. You don't need a million subscribers — you need a thousand true fans who'll pay. Lucas: And that's the core of solopreneurship. Find a group of people with a specific problem, solve it better than anyone else, and charge for the value. Luna: I think I'm going to try that quarterly survey idea for my own side project. It's such a simple way to stay aligned with your audience. Lucas: Do it. And if you do, let us know how it goes. Maybe we'll have you back to share your own case study. Luna: I might take you up on that.