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Ory Keto
The most scalable and customizable permission server on the market. Fix your slow or broken permission system with Google's proven "Zanzibar" approach. Supports ACL, RBAC, and more. Written in Go, cloud native, headless, API-first. Available as a service on Ory Network and for self-hosters.
OPA takes a whole different approach. They basically have a specific language and a corresponding interpreter. The previous version of Keto was based off of OPA. We discovered that it is not suitable for our needs and what we want to offer because it can be very hard to meet certain performance goals (e.g. https://github.com/ory/keto/issues/104)
Taking this simple approach allows us to provide a global, low latency, and consistent authorization system.
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Nutrient
Nutrient - The #1 PDF SDK Library. Bad PDFs = bad UX. Slow load times, broken annotations, clunky UX frustrates users. Nutrient’s PDF SDKs gives seamless document experiences, fast rendering, annotations, real-time collaboration, 100+ features. Used by 10K+ devs, serving ~half a billion users worldwide. Explore the SDK for free.
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Ory Kratos
Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network. (by ory)
Keto only does authorization, independent of users, devices, bots, applications, ... Basically you store your ACLs there and then ask "is _subject_ allowed to do _relation_ on _object_". All the variables are whatever you define them to be.
Checkout https://github.com/ory/kratos, our identity server.
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Ory Hydra
The most scalable and customizable OpenID Certified™ OpenID Connect and OAuth Provider on the market. Become an OpenID Connect and OAuth2 Provider over night. Broad support for related RFCs. Written in Go, cloud native, headless, API-first. Available as a service on Ory Network and for self-hosters.