TL;DR
For Shopify Plus checkout testing: Use ExperimentHQ with checkout.liquid scripts or checkout extensibility. Test trust badges, express checkout placement, and shipping options first (low risk). Avoid testing payment flows or required fields without extensive QA. Always track revenue, not just conversion rate.
Shopify Plus Checkout: What You Can Test
Shopify Plus gives you access to:
- • checkout.liquid — Full HTML/CSS/JS control (legacy, being deprecated)
- • Checkout extensibility — UI extensions, app blocks (new standard)
- • Scripts — Discount logic, shipping rules
- • Checkout branding — Colors, typography, layout
⚠️ Critical: Never break the payment flow. Test visual/UX changes, not core functionality.
Tool Comparison
| Tool | Price | Checkout Support | Revenue Tracking | Verdict |
|---|---|---|---|---|
| ExperimentHQ | $29/mo | Best Value | ||
| VWO | $10,000+/yr | Enterprise | ||
| Convert | $699/mo | Mid-market |
Checkout Tests by Risk Level
| Test | Risk | Impact |
|---|---|---|
| Trust badges placement | Low | Medium |
| Express checkout prominence | Low | High |
| Shipping options order | Low | Medium |
| Field labels and help text | Low | Low |
| Payment method order | Medium | Medium |
| Guest vs account creation | High | High |
Our Recommendation
For Shopify Plus checkout: ExperimentHQ with checkout.liquid or extensibility integration. $29/month with automatic revenue tracking.
Start with low-risk tests: Trust badges, express checkout prominence, shipping options. Avoid payment flow changes.