There’s a real, meaningful difference between an “independent website” and a single-author newsletter — a small multi-person outlet is still institutionally independent, but it’s not the same phenomenon as one individual writer, with no editorial team and no institutional backing at all, building a genuinely large, paying readership from scratch. This list is specifically about that second category: the single-author Substacks and independent newsletters that have proven the format works, not multi-author publications wearing an independent label.
The single largest independent newsletter on the internet
Letters from an American, written by Boston College history professor Heather Cox Richardson, is Substack’s single largest newsletter — over 2.9 million subscribers to one person’s daily writing, putting current political events into historical context, priced at just $5 a month. It’s the clearest existing proof that a single, credentialed writer with a consistent daily habit can build an audience larger than most traditional newsrooms.
The researcher-turned-essayist model
Adam Mastroianni, a former Columbia psychology researcher, writes essays about science and human behavior that are genuinely rigorous and genuinely readable at once — a combination academic writing rarely achieves, publishing roughly twice a month at $5/month. His success is a real data point for a specific pattern: subject-matter experts leaving institutional publishing entirely and finding that a direct relationship with readers pays better and reaches further than academic journals ever did.
Cultural criticism with a genuinely large, organic following
Rayne Fisher-Quann’s “Internet Princess” has attracted more than 100,000 subscribers writing incisive cultural criticism about technology, identity and modern life — built without any institutional backing, purely on the strength of a distinct voice and consistent, sharp writing.
Writers writing about writing itself
Roxane Gay’s newsletter mixes her own writing with pieces from emerging writers and direct reader Q&A, functioning as both a personal platform and a discovery mechanism for other independent voices. Courtney Maum’s Substack focuses specifically on demystifying the book publishing process for aspiring authors — a genuinely useful, narrow specialty that a general publishing-industry outlet wouldn’t cover with the same depth.
Lifestyle and culture, independently built
Erika Veurink’s “Long Live” covers secondhand fashion, books, and culture twice a week, and has become a best-selling Substack publication built entirely around one consistent voice and a specific aesthetic sensibility, rather than trying to cover everything for everyone.
The actual takeaway
What separates this category from a traditional independent media outlet is genuinely structural: no editorial staff, no institutional backing, and often no prior media career at all — just one writer, a consistent publishing habit, and a direct financial relationship with readers who pay because the writing itself is worth it. Letters from an American at nearly 3 million subscribers is proof of how large that model can scale; the smaller writers on this list are proof it works at every size in between, not just at the very top.
