Writing and emailing a newsletter is Mailchimp's problem, already scoped on this register. Substack itself has no flat fee — it takes roughly 10% of paid subscription revenue instead — but adding that paywall logic yourself is real additional depth, still within a capable weekend.
VIBE SCORE 93/100
The parts this build actually needs, each rated on its own — the average is the Vibe Score above.
| Landing page | 99 |
| CRUD database | 95 |
| Email notifications | 91 |
| Stripe checkout | 88 |
| User login | 92 |
Two real costs, not just "free": the AI agent's own usage, and hosting once it's running. Both are estimated from this app's own effort rating and component list — see the assumptions on the method page.
| AI agent — with a subscription (Claude Pro/Max, Cursor, etc.) | $0 marginal |
| AI agent — pay-per-use API, no subscription | $43–$86 one-time |
| Hosting, once it's running | $0/mo (free tier) |
| Domain name, if you want your own | ~$12/yr |
Substack's pricing varies — check the source link on this page to compare against your own build cost.
Don't feel like building it? These are already made, open-source, and free.
Borderline. Writing and emailing a newsletter is Mailchimp's problem, already scoped on this register. Substack itself has no flat fee — it takes roughly 10% of paid subscription revenue instead — but adding that paywall logic yourself is real additional depth, still within a capable weekend.
Substack's pricing varies by plan — check the source link on this page for current numbers.
Deliverability at scale is the same ongoing reputation problem every email platform on this register faces Their built-in discovery network (readers finding you through Substack's recommendations) doesn't come with a self-hosted build Podcast and audio-post support, if you want it, adds Buzzsprout-shaped scope on top
Yes — Ghost are open-source options worth trying before you build your own. Details are in the standard parts section on this page.
Closest matches on the register — ranked by the build parts they share with Substack, not just by category.
Browse all marketing tools · every comparison · how scoring works · the full register
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