# Better Auth vs Supabase Auth
URL: https://wwadd.dev/compare/better-auth-vs-supabase-auth
Last verified: 2026-10-05

Both provide authentication, but the integration boundary differs. Better Auth fits auth into your TypeScript backend; Supabase Auth connects identity and JWT sessions to Supabase's Postgres and data APIs.

## Verdict
Choose by where data authorization will run and who operates authentication. Better Auth suits a backend you control; Supabase Auth suits identity integrated with Supabase's data layer. Skip browser-to-database access until grants and RLS are tested, and keep secret/service-role keys on trusted servers. Migrating users and active sessions needs its own plan.

## Pick Better Auth when
- Your TypeScript backend already owns data access and you need configurable auth alongside it
- The organization/plugin model fits and you can operate the auth service and database-backed schema

**Skip Better Auth if:** you need a managed auth service and cannot operate the library's backend and database-backed schema.

## Pick Supabase Auth when
- Your app already uses Supabase and identity should feed its tested Data API and row policies
- You want the hosted auth service, while owning application permissions and SSR cookie handling

**Skip Supabase Auth if:** you need organization management that you cannot implement and test with application membership tables and policies.

## Related tools
- [Better Auth](https://wwadd.dev/tools/better-auth)
- [Supabase Auth](https://wwadd.dev/tools/supabase-auth)

## Related playbooks
- [Next.js + Postgres + Prisma + Vercel](https://wwadd.dev/stacks/nextjs-postgres-prisma-vercel)
- [B2B SaaS (organizations / multi-tenant): Next.js + Postgres + Better Auth](https://wwadd.dev/stacks/b2b-saas-nextjs-postgres-better-auth)

## What actually differs
- Deployment: Better Auth — A library in your backend, with supported database adapters and plugins; Supabase Auth — Use the hosted Supabase service or operate the open-source auth server yourself
- Identity and sessions: Better Auth — Database-backed auth tables and cookie sessions, with optional caching or stateless configurations; Supabase Auth — Auth records in a Postgres schema and JWTs sent through client SDKs or APIs
- Application data access: Better Auth — Your server verifies sessions and authorizes queries; adding the library does not create row policies; Supabase Auth — Auth tokens integrate with Data API requests; you write and test grants and RLS policies for exposed tables
- Organizations and permissions: Better Auth — The organization plugin provides membership, invitation, and access-control building blocks; Supabase Auth — Model application memberships and permissions in your schema and enforce them in RLS or trusted server code
- Operations and license: Better Auth — MIT core; you maintain endpoints, database migrations, email delivery, and upgrades; Supabase Auth — MIT auth server; hosted service costs and limits are separate, while self-hosting makes operations yours

## Sources
- [Better Auth database adapters](https://better-auth.com/docs/concepts/database)
- [Better Auth sessions](https://better-auth.com/docs/concepts/session-management)
- [Better Auth organizations](https://better-auth.com/docs/plugins/organization)
- [Better Auth email delivery](https://better-auth.com/docs/concepts/email)
- [Supabase Auth](https://supabase.com/docs/guides/auth)
- [Supabase Row Level Security](https://supabase.com/docs/guides/database/postgres/row-level-security)
- [Supabase SSR sessions](https://supabase.com/docs/guides/auth/server-side)
- [Supabase self-hosting responsibilities](https://supabase.com/docs/guides/self-hosting)
- [Supabase Auth server license](https://github.com/supabase/auth/blob/master/LICENSE)
- [Better Auth core license](https://github.com/better-auth/better-auth/blob/main/LICENSE.md)