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openfga
A high performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar
It might be overkill for your needs, but I did a bunch of research to implement fine-grained access control in our system and ultimately went with OpenFGA.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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spicedb
Open Source, Google Zanzibar-inspired database for scalably storing and querying fine-grained authorization data
Look at SpiceDB https://github.com/authzed/spicedb based on Google's Zanzibar authorization spec. It's a graph-based relationship database which allows you to do things like:
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Oso and OpenFGA are two alternatives that implement Zanzibar-style authorisation.