Hi Team, We have a custom-built quiz on our Shopify store, Measure & Made, and want to run a 50/50 A/B test: • Variant A: Show the email field before the quiz starts. • Variant B: Show the email field after quiz completion. We need to retain our existing Klaviyo integration (list ID: XMiCKn) and

mm_email

cookie. Does your app support this custom JavaScript-based experiment, persistent visitor assignment, and custom event tracking? Could you also confirm the lowest plan that supports these requirements? Thanks!

One thing I’d validate before choosing the plan is how the experiment assignment is persisted and what identifier is used across the quiz flow. Since you’re keeping the existing Klaviyo integration and

mm_email

cookie, I’d make sure the variant assignment and exposure event don’t change if the visitor refreshes, comes back later, or moves between steps. I’d also separate the experiment exposure event from the quiz/email conversion events so you can verify attribution cleanly afterward. I’ll leave the minimum-plan question to the GrowthBook team, but from a measurement standpoint those would be the first things I’d confirm.

Thanks @freezing-crayon-41389 — that’s exactly right. The free Starter plan is the lowest plan supporting the custom JavaScript experiment, 50/50 assignment, standard cookie-based persistence, and custom event tracking. Pro is only required if you need features such as Sticky Bucketing, which preserves assignments when experiment targeting or traffic allocation changes. growthbook.io/pricing

Like you are saying in pro plan we can achieve this feature ?

In all plans; starter too