Comparison · 60 merchant reviews read · Updated October 2026
Trident AB vs Theme Scientist
Short answer
Pick Trident AB if you need price tests and template tests and you want to start on a free plan.
Pick Theme Scientist if you need theme tests.
 Trident AB |  Theme Scientist | |
|---|---|---|
| App Store rating | 4.7★ (47) | 4★ (13) |
| Cost at your traffic | Free to startStarting price. The listing says price rises with visitors but gives no tiers. | $29.99+/moYour traffic is above the listed limits. Tester Pro is the floor, expect a custom quote. |
| How price scales | Free for up to 500 monthly impressions, then $19.99 to $49.99/month as your monthly impression limit grows, with about 20% off for annual billing. | Starts at $9.99/month with a 14-day free trial, and the price goes up as your store's monthly order limit increases (50, 250, or 500 orders). |
| Launched | August 9, 2021 | March 5, 2020 |
| App Store listing | App Store listing |
Trident AB starts at $0 a month, Theme Scientist at $9.99
Trident AB
- FreeFree
- Premium$19.99/mo
- Business$24.99/mo
- Enterprise$49.99/mo
Theme Scientist
- Tester$9.99/mo
- Tester+$19.99/mo
- Tester Pro$29.99/mo
Only Trident AB can run price tests
Read from each app's listing. A dot means the listing says it can do it.
| Trident AB | Theme Scientist | |
|---|---|---|
| Price tests | ● | ○ |
| Theme tests | ○ | ● |
| Template tests | ● | ○ |
| Content tests | ● | ● |
| URL split tests | ● | ○ |
| Free plan | ● | ○ |
What reviewers complain about
Share of each app's reviews that complain about the topic. Apps under 20 reviews are left out because a single review swings the number.
| Trident AB | |
|---|---|
| Price | 2.1% |
| Billing and refunds | 2.1% |
| Support | 6.4% |
| Bugs | 12.8% |
| Setup | 0% |
| Dashboard | 6.4% |
| Reporting and stats | 6.4% |
| Flicker | 0% |
| Page speed | 0% |
| Integrations | 2.1% |
| What you can test | 0% |
| Results | 0% |
The most common Trident AB complaint: bugs
Not impressed. Our first test had an issue and when we tried to make the changes necessary it just glitched and kept trying to load. So we created a new test, and it will not switch back and forth at all. Support tried to help, but doesn't seem to be able to figure out what is going on. We just want a refund and will try a different app instead.
Theme Scientist replies to 85% of reviews. Trident AB replies to none
| Trident AB | Theme Scientist | |
|---|---|---|
| Reviews with a developer reply | 0% | 85% |
| Praise support | 12.8% | 69.2% |
| Complain about support | 6.4% | 7.7% |
Serious problems reviewers reported
Billing disputes, broken stores, misused data and missing features. Each one is a single merchant's account.
The app is faulty and causes rework - it removed all our variant images and caused lose of sales. Now we have hours of rework to just get our website back to where it was before implementing this app.
I ran one test on one product detail page. the goal was to test the product images. Test didn't work as it should. I immediately stopped it. But the app destroyed our product detail page. All images were a mess. Can't recommend it.
when I hopped on a call they promised free trial for 2 years, haven't received it since months. Also there's almost no live chat support, making it difficult to communicate. App does not show ATC performance as well, must be bug.
Results merchants put a number on
- +9% other with Trident AB, testing checkout button. “up 9%”
- over $50k a year revenue with Theme Scientist, testing multiple growth ideas. “increase our revenue by over $50k a year”
- double conversion rate with Theme Scientist. “double, yes double our conversion rates in 3 months”
Add another app to this comparison
Other head-to-heads: Trident AB vs IntelligemsTheme Scientist vs IntelligemsTrident AB vs VisuallyTheme Scientist vs VisuallyTrident AB vs ElevateTheme Scientist vs ElevateTrident AB vs ShopliftTheme Scientist vs ShopliftTrident AB vs PersonizelyTheme Scientist vs PersonizelyTrident AB vs ABConvertTheme Scientist vs ABConvert
Looking past Trident AB and Theme Scientist? See Trident AB alternatives.