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🔐 Identity & SSO
Single sign-on, OAuth and identity providers you can self-host — open source alternatives to Okta, Auth0 and Azure AD.
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🛡 VPN & Private Networks
Encrypted tunnels and mesh VPNs on infrastructure you control — open source alternatives to NordVPN, ExpressVPN and commercial mesh services.
📬 Transactional Email
Send password resets, receipts and alerts from your own mail infra — open source alternatives to SendGrid, Mailgun and Postmark.
📚 Wikis & Documentation
Team wikis, handbooks and product docs you own — open source alternatives to Confluence, GitBook and Notion docs.