The verdict
For a small B2B team that wants to start testing a website soon, I'd pick Convert Experiences. You can read the plans, try it and learn whether the workflow suits you without a scoping conversation.
If testing is a full-time job for several teams, with engineers running tests in the product and marketers running them on the site, I'd pick Optimizely. It is built for that.
A test needs enough visitors to reach a result, whichever tool you use. A bigger platform will not fix a low-traffic site.
Side by side
| 10 points compared | ||
|---|---|---|
| Starts at | $299/mo | |
| Free plan | No | |
| API | Yes | Yes |
| MCP server | Yes | Yes |
| Audience targeting for experiments | Yes | Yes |
| Automatic traffic shifting to winners | Yes | Yes |
| Bayesian or sequential statistics | Yes | Yes |
| Feature flags and gradual rollouts | Yes | Yes |
| Server-side experiments | Yes | Yes |
| Website personalisation | Yes | Yes |
| Links |
Plans and pricing
Convert Experiences
- Growth$399/mo
- Pro$599/mo
Optimizely
Pricing not in our catalogue yet.
Who each is for
Choose Convert Experiences if…
Pick Convert Experiences if you are a marketing, growth or agency team that tests pages on websites. Agencies get separate projects and domains for each client. The plans are public, there is a 15-day trial and an enterprise tier exists if you outgrow the standard ones.
It is the better fit when you want to begin this week. Check the monthly tested-user allowance against your traffic first, since that number sets the plan.
Choose Optimizely if…
Pick Optimizely if you run a structured optimisation programme across websites and product features. Feature experimentation uses SDKs for several languages, so engineers can test inside your own code, while marketers use web experimentation. The wider platform also covers content management and campaign tools, so one vendor can cover several jobs.
Expect a demo before you see a number, and budget for people as well as the licence. Someone needs to own the test roadmap, and engineers need to add the SDKs.
Other options worth a look
A/B testing, web personalisation and on-site surveys all combined in one ecommerce-focused platform.
Runs A/B and multivariate tests on websites to track visitor behaviour and optimise conversion rates.