Substack for fiction authors is one of the most recommended platform moves in author marketing right now: start a Substack, build your list, reach new readers through the platform’s discovery tools. For nonfiction writers and personal essayists, this advice holds up reasonably well. For fiction writers, the reality is more specific, and the gap between expectation and outcome is wide enough that it’s worth naming clearly before you spend three months building something that doesn’t do what you thought it would.
Substack is a publishing platform with email distribution built in. That distinction matters in practice. Most newsletter platforms (MailerLite, Kit, Flodesk) exist to send emails to a list you’ve built elsewhere. Substack exists to publish content that readers can subscribe to, and while subscriptions arrive by email, discovery usually happens inside the Substack app or web reader, where readers browse and follow writers through Notes, recommendations, and category listings.
This means Substack has a different growth mechanism than a traditional newsletter. When it works, readers find you inside Substack and subscribe. But the readers Substack tends to surface are the readers the platform already has, and Substack’s native readership skews strongly toward nonfiction: journalism, personal essays, cultural commentary, newsletters that explain things. Fiction readers exist on Substack and the fiction category is growing, but the platform’s gravitational pull doesn’t point in that direction.
The implication for fiction authors is that the "build your list on Substack" advice doesn’t mean the same thing it means for a newsletter-first nonfiction writer. An author who moves their 3,000-subscriber MailerLite list to Substack and expects organic growth will probably find their open rates are fine and their list growth is slow. The existing subscribers follow them over. New subscribers don’t appear at the rate they might on a platform with a different native audience shape.
This doesn’t mean Substack is wrong for fiction authors. It means the use case is different from what’s usually described.
The fiction writers I’ve seen use Substack well are using it as a serialization venue or a process-transparency platform. They publish chapters in progress, bonus scenes that didn’t make it into the final book, notes about research and craft decisions, letters to readers written from inside the writing. That content builds an engaged subscriber community, but it’s a different kind of engagement than a launch-day email list. The people who subscribe to read a serial or to follow a writer’s process are invested in that writer in a way that’s real and durable. They are less likely to buy on launch day from a promotional email. They are more likely to buy because they’ve been along for the ride.
That’s a meaningful thing. It’s just not the same as the email list that drives launch week sales, and it doesn’t solve the same problem.
The other significant shift is that organic Substack discovery contracted noticeably in 2025. Authors who built early Substack followings in 2023 and 2024 benefited from a less crowded platform with more active recommendation mechanics. The platform has grown substantially since then, and discovery now favors writers with existing audiences who drive new subscribers from external platforms. Growing from zero on Substack in 2026 requires bringing readers with you from somewhere else first. That shift matters for how you set expectations, especially if the main draw was platform-native discovery.
If you have an existing email list on another platform, moving to Substack is a meaningful operational decision with real trade-offs. Substack has less sophisticated segmentation and automation than MailerLite or Kit. You can’t tag subscribers by genre preference, send different sequences to different reader groups, or set up a welcome sequence that drips over several weeks. What you gain is a publishing experience that’s easier to maintain and a platform where the content itself is what readers engage with. Setting up a newsletter with real segmentation is a different project from building a Substack readership. That’s the kind of setup work I cover in the newsletter service, and it usually starts with a single question: what is this newsletter actually for?
If you’re starting from zero and you want to write regularly and build a reader community around the process of writing, Substack is a reasonable home base. The writing tools are good, the community is genuinely collaborative, and email deliverability is solid. Just don’t go in expecting the platform to do the audience-building for you. That part still depends on where you’re sending readers from.
Before setting one up, the question worth sitting with is: what do I actually want this to do? If the answer is "grow my email list," Substack is one mechanism for that but not necessarily the most direct one. If the answer is "publish regularly and have a place where interested readers can follow the work," it fits well. If the answer is "replace my current newsletter setup," that depends entirely on what your newsletter is currently doing and whether Substack’s automation limitations matter for your specific setup.
Fiction authors are being told "get on Substack" at roughly the same volume as "get on TikTok" two years ago. The actual case for each is narrower than the advice implies.
