#21
B+
Rank #43
GrowthBook
An open-source feature flagging and A/B testing platform with a warehouse-native analytics model. Standout trait is edge-evaluated SDKs that keep flag checks fast and off the critical path of the app request.
77.0
/ 100
⚙ Full Stack
Node.js/Express API server with a Next.js admin UI, MongoDB (default) or Postgres/MySQL for config storage, and SDK clients that fetch/cache flag payloads for edge evaluation.
📈 Scaling Analysis
Flag evaluation is designed to happen client/edge-side against a cached payload, so the central server only needs to scale for config writes and analytics ingestion — a genuinely scalable design as long as the backing Mongo/Postgres instance is sized for the analytics event volume.
🚀 Running on Nexlayer
Single growthbook pod with a mongo pod (mongo.pod:27017) or postgres pod for config storage; the admin API and the flag-serving endpoint should both be reachable via <podName>.pod:<port> from app pods. Official image is Docker Hub library — mirror via mirror.gcr.io.