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 $80 per month (indicative, hosted Pro)
Free tierQuote on request
Quote onlyWhat drives the bill
The metric that actually scales your invoice.
Self-hosted open source is genuinely free; enterprise adds SSO, audit and change requests.
Quote-based, generally aimed at companies with a data team and a warehouse already in place.
Free tier
Open-source edition is free and self-hosted with no user limits.
Free tier available for small teams.
Open source
Apache-2.0 (core)
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
Unleash / Bricks Software · since 2014
Established
Eppo (Datadog) · since 2020
Strengths
Limitations
Best for
Privacy-sensitive or cost-sensitive teams that want flags without sending user data to a vendor.
Data-mature organisations where experiment results must withstand scrutiny.
All of these integrate with: Slack.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.