Convex + Better Auth · SvelteKit and Next.js
Auth screens you own, down to the last line.
The missing frontend layer for Better Auth and Convex: sign-in, organizations, profiles and account surfaces, installed as code in your repo and themed by your design system. Nothing hosted, nothing per-seat.
Code in your repo · data in your Convex · no per-user fees
What ships in the box
The account surfaces you would otherwise rebuild
Backend auth is a solved problem. The screens around it — every state of sign-in, every organization flow, every account page — are where the weeks go. That layer is the product.
- Sign-in and sign-up
- Password, magic link, verification codes and social providers, with every in-between state already handled.
- Organizations
- A switcher, a create flow, member and role surfaces — the part every team underestimates.
- Profiles and accounts
- User settings and account primitives that behave like part of your product, not a hosted popup.
- Production fit
- Server-side rendering, your active theme, mobile gestures and real-world session handling.
How it fits
Three steps, and your stack stays yours
- 01
Keep Better Auth for the auth logic
Sessions, providers and authorization stay on the backend primitives you already trust.
- 02
Keep Convex for your data
Users and organizations live in your own Convex deployment, next to the rest of your app.
- 03
Install the frontend layer
Branded auth screens and account surfaces land in your repo as code you can read and change.
Why self-hosted
Own the code. Own the data. Own the economics.
Own the code
The components live in your repo and evolve with your product. When auth becomes a product surface — and it always does — you edit a file instead of filing a ticket.
Own the data
User and organization records stay in your Convex deployment. No hosted mirror, no sync job, no second source of truth for who your users are.
Own the economics
No per-user or per-organization pricing between your product and its growth. The tenth user costs what the ten-thousandth costs: nothing.
Before you commit
Questions teams ask first
Which stack is supported today?
SvelteKit and Next.js are live today. Both install owned UI code on top of Convex and Better Auth.
Do I own the code and user data?
Yes. The components and flows live in your project, and your user data stays in your own Convex setup.
Are there per-user or per-organization fees?
No. This product is built around self-hosting and code ownership rather than hosted-seat pricing.
What does the product cover?
Sign-in and sign-up flows, organizations, user and profile primitives, and a strong UI foundation for admin and account surfaces.
Ship the auth surface, not just the auth backend.
Start with SvelteKit or Next.js and keep the stack under your control.