Instant Evaluation
Go relay proxy delivers sub-millisecond flag decisions to your SDKs via a local ruleset cache.
Phase FlagFeature flagging for developers
Open source, self-hosted, or SaaS — deploy in minutes
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Every Language
Official SDKs for JavaScript, Python, Go, React, Java, .NET, and more — with OpenFeature support.
Deploy Anywhere
OSS Docker Compose, self-hosted VPS, Kubernetes/Helm, or our managed cloud at phaseflag.com.
SaaS-Ready
Multi-tenant organizations, Stripe billing integration, role-based access control, audit log.