Codapult
Modular Next.js SaaS boilerplate — auth, billing, teams, AI & infra already wired together
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Codapult is a modular Next.js 16 SaaS boilerplate with auth, payments, teams, admin panel, AI features, SSO, and infrastructure already connected — not just scaffolded.
Built around an adapter pattern: swap auth providers (Better-Auth/Kinde), payment providers (Stripe/LemonSqueezy/Polar), and storage (local/S3/R2) by changing one environment variable. No vendor lock-in, no rewrites.
70+ modules, each independently removable via CLI. Start with a lean MVP and add teams, RBAC, SAML SSO, audit logs, and infrastructure templates as you grow — without replacing the foundation.
One-time purchase. Full source code. Live demo available.
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FounderPlaybooks.
What other founders did to grow.
2722 dispatches from hundreds of founders, pulled from the week's best podcasts.
a friend of mine that owns a printing company uh wants to update his Tech right... I had Max and Sparky's uh Galactic Dre uh on a back burner for a little while um and I was like hey man I got this book right and used AI to do some help... I got to learn how this process works by building something for me at the same time
Build a side project to learn another business
When you're building software for an industry you don't know, ship a real product through that industry's pipeline yourself before writing code. Andrew wrote and printed a Ruby kids' book to learn his friend's printing business end-to-end — ISBN, copyright, margins, ebook vs print. Building the thing the customer builds teaches you more than any discovery call.
If I say I'm a Strava user — well what do you think? They're probably an athlete, they probably care about fitness. It's an identity. If you're a Surfline user, you're a surfer — that's just who you are. Tying your CSS business to passion is a great way to enhance retention, and passion ties to identity.
Maslow's hierarchy of subscription: apps tied to identity and passion retain longest
Crowley maps CSS apps onto Maslow's hierarchy: safety (Life360, Citizen), love/belonging (communities), esteem (leaderboards), and self-actualization (Calm, Audible). Apps anchored to identity — 'I am a hunter, so I use OnX' — retain at a fundamentally higher rate because cancelling the app feels like a personal renunciation. The tactical implications: build community features for belonging apps, leaderboards for esteem apps, fresh content for self-actualization apps.
There's a play for whatever you're stuck on.
Read all 2722 playbooks