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Chili vs Field Test

Chili and Field Test both sit in experiments, but they solve different parts of it.

Thin comparison — they do not replace the same product. Kept readable, left out of search.

Field Test

Better known

A/B testing for Rails with a results dashboard and real statistics

No ratings yet
# Gemfile
gem "field_test"

# config/routes.rb
mount FieldTest::Engine, at: "/field_test"

What Chili does

The spicy feature toggle framework for Rails Have you ever wanted to test out a new feature on only a subset of users? Did that implementation end up being lots of if/else statements embedded in the main code? If so, Chili can help. 214 stars on GitHub · MIT licensed · maintained by balvig. Source: <https://github.com/balvig/chili

Read the full Chili listing →

What Field Test does

A/B testing that stores assignments in your database and shows the results in a mounted dashboard. Experiments defined in a YAML file Variant assignment that survives the anonymous-to-signed-in transition Conversion tracking with one call A dashboard with Bayesian probability that each variant wins The hard part of A/B testing is not splitting traffic — it is keeping a visitor in the same bucket after they sign up. Field Test handles that because it can see both the cookie and the user record.

Read the full Field Test listing →

Why you might pick it

  • It also replaces VWO.
  • It has substantially more adoption — 590 stars against 214.

Side by side

Rows where the two differ are marked.

Chili vs Field Test compared across category, licence and coverage
Chili Field Test
Category Experiments Experiments
Replaces (differs) VWO
License MIT MIT
GitHub stars (differs) 214 590
Gem (differs) chili field_test
Mounts at (differs) /field_test
Member rating

What each one gets off your invoice

Both replace

Nothing unique here.

Only Chili

Nothing unique here.

Only Field Test

Questions

What is the difference between Chili and Field Test?
Chili and Field Test both sit in experiments, but they solve different parts of it.
Can I mount both Chili and Field Test in the same Rails app?
Technically yes — engines mount at different paths — but they overlap, so running both usually means two sets of tables doing one job. Pick one.

Other comparisons in Experiments