#200
B+
Rank #51
Unleash
A mature, open-source feature-flag and experimentation platform with SDKs across most languages. Its standout trait is a clean, stateless-API architecture with strong RBAC and SSO support rivaling commercial LaunchDarkly-tier tools.
76.3
/ 100
⚙ Full Stack
Node.js/TypeScript API server backed by Postgres for all flag, project, and permission state, with client SDKs polling or streaming flag evaluations rather than embedding logic client-side.
📈 Scaling Analysis
Explicitly designed for horizontal scale — the API layer is stateless with Postgres as the single source of truth, and SDKs cache flag state locally to survive brief server outages, a proven pattern that holds up well from small teams to large organizations.
🚀 Running on Nexlayer
Two-pod deploy: `unleash` app pod plus `postgres.pod:5432`; the app is fully stateless so multiple replicas can share the same Postgres instance behind a load balancer for HA with no special session affinity required.