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Featureflow: feature flags for teams that ship often and can't afford a bad release. Featureflow has run in production for more than 10 years and serves over 20 million flag evaluations a day. You put a change behind a flag, release it to 1% of users, then 25%, then everyone. If something breaks, you turn it off. No redeploy needed. Simple. Boolean and multivariate flags, runtime JSON configuration, percentage rollouts, and targeting by user attribute or reusable segment. There are SDKs for Node.js, Java, Go, Python, Ruby, .NET, JavaScript, React, React Native, iOS, Android and more. You can ship a mobile app once, then release features and update JSON config in the versions users already have installed. Agentic. Featureflow publishes an MCP server on npm, so you can manage flags from Claude, Cursor or Copilot. "Roll new-checkout to 25% in production" becomes one sentence instead of a dashboard session. The assistant goes through the same server-side permissions as the dashboard and the REST API, so it can only do what its token allows. Release pipelines and approvals. You define your rollout phases once, and every feature moves through the same ones, so a PM can manage the rollout safely. Each environment can require approval before a change takes effect, and the audit trail records who changed what and when. Integrations. Jira (two-way), Slack, Datadog, Grafana, signed webhooks and more. Every flag change appears where your team already works. Fair pricing. There are no per-seat, per-MAU or per-connection charges, and paid plans include unlimited seats. You can start free with no credit card. Real support. Questions are answered by our engineering team.
United States
3.7
1 review
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Simple to get started and great help via chat.
The team were on hand to answer questions despite only using the business plan. Setup was simple and has everything we need (approvals, stats and targeting).
I would certainly recommend if you want a fully featured feature flag tool for rollout control.
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