Skip to content
testcritic

LaunchDarkly vs AB Tasty

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 tier

Quote on request

Quote only

What drives the bill

The metric that actually scales your invoice.

LaunchDarkly has dropped per-seat pricing: Developer is free with unlimited seats, and Foundation is pay-as-you-go on service connections and client-side monthly active users with no platform or seat fee. High-traffic consumer products still get expensive, but now through MAU rather than seats. Enterprise is quote-based.

Quote-based annual contracts priced by traffic volume, now sold as part of the merged Wingify platform.

Free tier

Developer plan is free forever with unlimited seats.

No free tier; demo on request.

Open source

Self-hostable

No-code authoring

Languages

JavaScriptTypeScriptPythonJavaC#GoRubyPHPSwiftKotlin
JavaScriptPythonJavaC#PHPCodeless

Platforms

WebAPIiOSAndroidDesktop
WebAPIiOSAndroid

Fits teams

Scale-up / mid-marketEnterprise
Scale-up / mid-marketEnterprise

Adoption

Category standard

LaunchDarkly · since 2014

Established

Wingify (VWO + AB Tasty) · since 2009

Strengths

  • Extremely reliable flag delivery with offline fallbacks — this is infrastructure you can trust in the request path.
  • Best-in-class governance: approval workflows, audit logs, role-based access.
  • Code references and stale-flag detection actually help you remove dead flags.
  • EU hosting and GDPR posture simplify European procurement.
  • Good balance between marketer-friendly editing and server-side flags.
  • Strong support reputation in European markets.

Limitations

  • Still the expensive option once client-side MAU volume is real, even after the move off per-seat pricing.
  • Experimentation is competent but less sophisticated than dedicated statistics platforms.
  • Usage-based billing on service connections and MAU is harder to forecast than a seat count.
  • Less well known outside Europe, with a smaller partner ecosystem.
  • Quote-based pricing with no self-serve entry.
  • Statistics engine is less differentiated than the warehouse-native platforms.

Best for

Engineering organisations where flags are critical infrastructure and governance is required.

European e-commerce and media companies with GDPR-driven vendor requirements.

All of these integrate with: Segment, Slack.

Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.