Yes, Convert can replace Optimizely for most mid-size teams that run client-side A/B tests on a website, and it costs far less to find out.
Convert publishes its prices, starting at $299 a month billed annually, while Optimizely quotes every plan by hand.
Optimizely is still the better fit for large companies that need one vendor for web, feature-flag and content experimentation across many teams.
We have not used either tool ourselves. This comparison is based on each vendor's pricing pages and docs, checked in November 2026. Optimizely has also published customer results that we keep in our test database, so we use those and other real tests to show what each tool is used for.
If you sign up for Convert through our link, we may earn a commission. Optimizely does not pay us.
| Convert | Optimizely | |
|---|---|---|
| Pricing model (as of November 2026) | Public: $299/mo billed annually or $399 monthly for 100K tested users | Not published; every plan is quoted |
| Free trial | 15 days, no credit card | None listed |
| Flicker control | Synchronous script with anti-flicker by default | Synchronous snippet; Performance Edge add-on for speed |
| Stats | Frequentist, sequential (Pro) or Bayesian | Sequential Stats Engine; fixed-horizon and Bayesian on the new results page |
| Privacy | EU servers in Frankfurt on all plans; GDPR, CCPA, SOC 2, ISO 27001 | IP anonymization and cookie consent controls |
| Best for | Mid-size stores, SaaS teams and agencies that want a known price | Enterprises with dedicated testing teams and developers |
The price gap
As of November 2026, Convert's pricing page lists Growth at $399 a month, or $299 a month billed annually ($3,588 a year).
Pro is $599 a month, or $420 a month billed annually ($5,040 a year).
Both include 100,000 tested users a month. Enterprise is priced on request.
Tested users are visitors bucketed into an experiment, not your total traffic.
If you go over, Convert charges $399 per extra 100,000 on Growth and $699 per extra 250,000 on Pro. You can switch overage charges off.
Optimizely gives no number. Its plans page says, "Every Optimizely plan is individually packaged," and asks you to talk to the team.
That means a sales process and a negotiated contract before you run a single test.
The gap matters most for Shopify stores. Convert lists Shopify price testing and shipping testing on its pricing page, and those are the tests that often move revenue most.
Dave Diederen tested shipping price levels and found a $9.49 fee beat the control by +43.81% revenue per visitor.
Oliver Kenyon lowered the price and removed a free gift ($82 vs $85 plus gift) and saw +46% CVR.
Before you pay for either tool, check whether your traffic can reach a result.
Our sample size calculator shows how many visitors a test needs.
Editors, flicker and speed
Both tools have a visual editor for no-code changes and a code editor for developers.
Optimizely's Web Experimentation page promotes no-code experiments, server-side control and AI that suggests what to test next.
Convert's product info page lists five code editors, a QA overlay, a REST API and an MCP server for writing tests with AI coding tools.
Flicker is when a visitor sees the original page flash before the variant loads.
Both vendors handle it the same basic way.
Optimizely's docs say Web Experimentation uses a synchronous snippet to prevent flickering, with a CDN to keep the page delay small.
Convert's support docs say loading in sync mode is the only guaranteed way to avoid flashing in most cases, and its pricing page lists default anti-flicker on all plans.
The trade-off is speed. A synchronous script makes the page wait for it.
Optimizely's answer for high-traffic pages is Performance Edge, an add-on that makes decisions on CDN servers and sends a smaller snippet.
Its FAQ notes you can't run Performance Edge and Web Experimentation on the same page at once.
Speed is not a small issue. Vasta reported that taking a store's mobile PageSpeed score from 35 to 92 came with a +20% conversion rate in a before/after comparison.
Oliver Kenyon found a landing page rebuilt natively in Shopify beat the same page in a page builder by +20.9% revenue per visitor.
Test the script's load time on your own site during a trial.
Stats and reporting
Optimizely's Stats Engine is its best-known feature. Its docs say significance self-corrects as a test runs, and it uses false discovery rate control.
The new A/B results page lets you choose sequential, fixed-horizon frequentist or Bayesian analysis and toggle CUPED.
One limit: that page only supports manual A/B tests, not multivariate or Stats Accelerator experiments.
Convert gives a similar choice. Its help docs describe frequentist t-tests with Bonferroni or Sidak corrections, Bayesian analysis, and sequential testing based on asymptotic confidence sequences.
Sequential testing is on Pro and Enterprise, not Growth. Every plan includes sample ratio mismatch checks.
Sequential methods matter because early results mislead. Ruben added a doctor endorsement badge to a product page and saw +17% conversion rate after one week at 99.6% probability, yet the test ended flat.
Our guide to Bayesian vs frequentist testing explains the choice.
Optimizely's published customer tests show the scale it is built for.
A retailer removed a membership banner from the cart and Optimizely credits it with +$5.5M revenue.
Personalized homepage recommendations drove +136% clicks to product pages.
Not every idea wins: a head-to-toe outfits carousel cut add to cart by 6.07%.
@oliverkenyon
@DaveDiederen
OptimizelyOptimizelyOptimizely
@RubendgrfPrivacy and support
Convert leads with privacy. Its product info page lists GDPR, CCPA, LGPD and TTDSG compliance, SOC 2 attestation and ISO 27001 certification.
The pricing page shows EU servers in Frankfurt on every plan at no extra cost, and Convert can delay bucketing visitors until they give consent.
Optimizely covers the basics for GDPR and CCPA.
Its privacy controls doc describes IP anonymization by project or account and ways to connect cookie consent tools.
It doesn't make privacy its main selling point the way Convert does.
On support, Convert offers email and in-app chat on all plans and phone support on Pro and Enterprise.
It says support is handled by people, with a median first response under five minutes, 24 hours a day except weekends.
None of its plans include development help. Optimizely does not publish support tiers; like pricing, they are part of each custom package, so ask sales what your contract covers.
Who should pick which
Pick Convert if:
- You are a mid-size store, SaaS company or agency that wants a known monthly price and a free trial.
- You sell to Europe and want EU hosting and consent controls without paying extra.
- You run on Shopify and want price and shipping tests alongside theme tests.
Convert is not for stores with too little traffic to reach significance, or companies that want CMS, commerce and experimentation from one enterprise vendor.
The 100,000 tested-user cap also means high-traffic sites will pay overage or test a share of visitors.
Pick Optimizely if:
- You have millions of monthly visitors and a team running many tests at once.
- Engineers need feature flags and server-side tests in the same platform as marketers' web tests.
- You already use Optimizely's CMS or commerce products.
Optimizely is not for teams without developers or an annual budget large enough for an enterprise contract, or buyers who want a price before a sales call.
Other options are worth a look. VWO vs Convert compares Convert with a tool that bundles heatmaps and recordings, and our Optimizely alternatives page covers AB Tasty, Kameleoon and Shopify apps.
For deeper detail, read the full Convert review and Optimizely review.