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warrant
Warrant is a highly scalable, centralized authorization service based on Google Zanzibar, used for defining, querying, and auditing application authorization models and access control rules.
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Ory Keto
Open Source (Go) implementation of "Zanzibar: Google's Consistent, Global Authorization System". Ships gRPC, REST APIs, newSQL, and an easy and granular permission language. Supports ACL, RBAC, and other access models.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Google doesn't actually offer Zanzibar as a product/service (in GCP or otherwise) to customers. However, they do use it internally to manage permissions across their various products (Google Docs, Drive, YouTube, etc.) and have had a lot of success doing so. Because of that, there are many open source implementations of Zanzibar out there (as others have commented). Warrant also maintains our own open source implementation of Zanzibar[1] which powers our managed cloud offering, Warrant Cloud[2].
[1] https://github.com/warrant-dev/warrant
Shameless plug for Ory Keto, probably the best reference implementation IMO https://github.com/ory/keto
Related posts
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Launch HN: Warrant (YC S21) – Authorization and access control as a service
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How Open ID Connect Works
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Warrant – open-source Access Control Service
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A guide to Auth & Access Control in web apps 🔐
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Warrant v1.0 - Highly scalable, centralized authorization service based on Google Zanzibar, now v1.0 and production-ready