Hexclave (Stack Auth)

Open-source Clerk alternative

Free tier + paidAuth & user managementhexclave.com

What it is

Open-source Clerk alternative, formerly Stack Auth, now a Y Combinator-backed company called Hexclave. Ships prebuilt React components, organizations, RBAC and user impersonation. Client SDKs are MIT-licensed and the server is AGPLv3 with commercial licensing available; the whole stack self-hosts for free.

Why it earns a slot

The closest thing to Clerk's component-level developer experience that you can also run on your own infrastructure, which makes the escape hatch real rather than theoretical.

Know before you commit

Rebranded from Stack Auth during 2026, so docs, packages (@stackframe/stack) and URLs still mix both names. AGPLv3 on the server means self-hosting inside a closed-source product requires a commercial license.

Getting started

npx @stackframe/init-stack@latest

Field notes

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Pricing snapshot

Free to 10k MAU · $49/mo Team (50k) · $299/mo Growth · self-host free

Snapshots move fast — verify at checkout, and post a field note if it changed.

Drop into your Lovable chat

Evaluate Hexclave (Stack Auth) (https://www.hexclave.com) for this project, then use it only if it fits what we are already building.
Context: Open-source Clerk alternative. Open-source Clerk alternative, formerly Stack Auth, now a Y Combinator-backed company called Hexclave. Ships prebuilt React components, organizations, RBAC and user impersonation. Client SDKs are MIT-licensed and the server is AGPLv3 with commercial licensing available; the whole stack self-hosts for free.
Reviewer notes (general, not written for this codebase): The closest thing to Clerk's component-level developer experience that you can also run on your own infrastructure, which makes the escape hatch real rather than theoretical.
Watch out for: Rebranded from Stack Auth during 2026, so docs, packages (@stackframe/stack) and URLs still mix both names. AGPLv3 on the server means self-hosting inside a closed-source product requires a commercial license.
Pricing: Free to 10k MAU · $49/mo Team (50k) · $299/mo Growth · self-host free
Setup: npx @stackframe/init-stack@latest
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

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Neighbourhood

How Hexclave (Stack Auth) sits against the rest of the atlas — swaps, companions and the tools builders actually save alongside it.