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"Field Test vs Split
Both replace VWO. Split is the better-known of the two (2,700 stars), while Field Test covers a narrower slice of the same job.
Split
Better knownRack-based A/B testing with a mountable dashboard
No ratings yet# Gemfile
gem "split"
# config/routes.rb
mount Split::Dashboard, at: "/split"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.
What Split does
The long-running Rack A/B testing framework, with a dashboard you mount. Experiments with any number of alternatives Multiple goals per experiment Weighted alternatives, and forced variants for QA A dashboard to start, stop and reset experiments and pick a winner Redis-backed Split stores in Redis and has been around longer; Field Test stores in your database and reports Bayesian probabilities. If you want experiment data joinable with the rest of your schema, take Field Test.
Why you might pick it
- It has substantially more adoption — 2,700 stars against 590.
Side by side
Rows where the two differ are marked.
| Field Test | Split | |
|---|---|---|
| Category | Experiments | Experiments |
| Replaces | VWO | VWO |
| License | MIT | MIT |
| GitHub stars (differs) | 590 | 2700 |
| Gem (differs) | field_test | split |
| Mounts at (differs) | /field_test | /split |
| Member rating | — | — |
What each one gets off your invoice
Questions
- What is the difference between Field Test and Split?
- Both replace VWO. Split is the better-known of the two (2,700 stars), while Field Test covers a narrower slice of the same job.
- Can I mount both Field Test and Split 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.
- Do Field Test and Split replace the same SaaS product?
- Both are listed as replacements for VWO.