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
Free tier available
Free tierFrom $99 per month (indicative, Pro)
Free tierWhat drives the bill
The metric that actually scales your invoice.
Paid tiers are quote-based, priced by monthly tracked keys.
Unlimited seats on every plan, including free — unusual and genuinely valuable for wide access.
Free tier
Free tier with limited monthly tracked keys.
Free forever plan with a monthly config-request allowance and unlimited members.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Harness · since 2015
Established
ConfigCat · since 2018
Strengths
Limitations
Best for
Teams that want every release measured, not just deliberate experiments.
Teams that want simple, cheap flags accessible to the whole company.
All of these integrate with: Datadog, Slack, Jira.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.