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Flagr

Open source feature flagging and A/B testing service — Flagr is an open source Go service that delivers the right experience to the right entity and monitors the impact

Developer Tools·Launched Dec 2017·0 upvotes·github.com

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ALIVEverified Jul 13, 2026 · HTTP 200

CohortClass of 2017

What it is

Open source feature flagging and A/B testing service — Flagr is an open source Go service that delivers the right experience to the right entity and monitors the impact. It provides feature flags, experimentation (A/B testing), and dynamic configuration. It has clear swagger REST APIs for flags management and flag evaluation. [Productivity, User Experience, Developer Tools]

HTTP liveness

14 probes since Jun 11

Jun 11Jul 13

AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)

Observed events

probes · press · GitHub

Jun 11, 2026
First probe — live
Alive · 200 OK

Moat

None apparent

Accumulates proprietary data that improves the product over time and that competitors cannot replicate.

weak · 0.80 confidence

Text classification · Jun 2026

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