Appliful

User authentication arrives configured: email and password, social login, session handling and protected routes. That covers the first two days of most builds, and it's the part people usually get wrong on the first attempt. You still own the logic, so adding roles or a second login provider is a normal code change.

Checkout, plan management and the webhook handling that keeps a user's status in sync after a renewal or a failed card are part of the package. Instead of testing payment flows from scratch, you edit prices and plan names.

Signup confirmations, password resets and receipts ship as templates you can restyle without touching the sending logic. Swapping providers means changing keys and one config file.

One module handles calls to image generation, text to speech and vision models, with keys kept on the server. You can add a feature to the dashboard in an afternoon and change providers later without rewriting the front end.

A logged-in area for account settings, usage and billing sits alongside event tracking for signups, conversions and referrals. It's a starting point rather than a full analytics suite, so plan on exporting data if you need deeper reporting.

The marketing side is included: a landing page with pricing and testimonials, a blog with per-post metadata, and docs pages. All of it uses plain Next.js routing, so editing copy is a text change, not a page builder session.