Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
From $99 per month (indicative, Pro)
Free tierFrom $20 per user/month (indicative, cloud Pro)
Free tierWhat drives the bill
The metric that actually scales your invoice.
Unlimited seats on every plan, including free — unusual and genuinely valuable for wide access.
Dramatically cheaper than the commercial platforms, especially self-hosted at high traffic.
Free tier
Free forever plan with a monthly config-request allowance and unlimited members.
Self-hosted open-source edition is free and unlimited; cloud free tier for up to a few users.
Open source
MIT (core)
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
ConfigCat · since 2018
Widely used
GrowthBook · since 2021
Strengths
Limitations
Best for
Teams that want simple, cheap flags accessible to the whole company.
Data-mature teams that already have a warehouse and want to avoid volume-based pricing.
All of these integrate with: Slack, GitHub.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.