head to head · open source
hydra vs voidauth
hydra has 17,649 GitHub stars, 1,617 forks, 98 open issues and last shipped 3 months ago. voidauth has 2,906 stars, 132 forks, 60 open issues and last shipped 2 days ago. hydra leads on adoption by 507% (17,649 vs 2,906 stars). hydra is written in Go under Apache-2.0; voidauth is written in TypeScript under AGPL-3.0. hydra has attracted 9% as many forks as stars, voidauth 5%. voidauth was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (docker), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| hydra | voidauth | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 2.9K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Go | TypeScript |
| Last push | 2026-07-29 | 2026-11-07 |
| Forks | ⑂ 1.6K | ⑂ 132 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick hydra if
- You weight community size — 18K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick voidauth if
- You want the voidauth feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and voidauth fits your workflow better
About hydra
Chat · Discussions · Newsletter · Docs · Try Ory Network · Jobs Ory Hydra is a hardened, OpenID Certified OAuth 2.0 Server and OpenID Connect Provider optimized for low latency, high throughput, and low resource consumption. It connects to your existing identity provider through a login and consent app, giving you absolute control over the user interface and experience. What is Ory Hydra? Why Ory Hydra OAuth2 and OpenID Connect: Open Standards OpenID Connect Certified Deployment options Use Ory Hydra on the Ory Network Self host Ory Hydra Quickstart Who is using Ory Hydra Ecosystem Ory Kratos: Identity and User…
read the full hydra overview →
About voidauth
Single Sign On for Your Self Hosted Universe Website Source Code What is VoidAuth VoidAuth is an open source SSO authentication and user management provider that stands guard in front of your self hosted applications. It is easy to use for admins and end users, supports nice to have features like passkeys, user invitation, self registration, email support, and more! Features: 🌐 OpenID Connect (OIDC) Provider 🔄 Proxy ForwardAuth 📖 LDAP Directory Server 👤 User and Groups Management 📨 User Self Registration and Invitations 🎨 Customizable (Logo, Title, Theme Color, Email Templates) 🔑 Multi factor…
read the full voidauth overview →
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Frequently asked questions
Is hydra or voidauth more popular?
hydra has 17,649 GitHub stars and voidauth has 2,906. hydra has the larger community by that measure.
Are hydra and voidauth free?
Both are open source. hydra is licensed under Apache-2.0 and voidauth under AGPL-3.0. Neither carries a licence fee.
What is the difference between hydra and voidauth?
hydra is written in Go and voidauth in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, hydra or voidauth?
Choose hydra if you want the larger community (17,649 stars) or its Apache-2.0 licence terms. Choose voidauth if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.