Kirro, VWO, and Convert are the three strongest Optimizely alternatives for most teams. But the “best” one depends on why you’re switching. Price? Complexity? Privacy requirements? A dev team that wants open source? Each reason points to a different tool.
We cover seven alternatives below, organized by why you’d switch. We also dig into the real cost of switching (not just the sticker price) and a major market shift from January 2026 that changes the recommendations. For more tool comparisons, we cover each matchup in detail. (Need the basics first? Our full A/B testing guide is a good starting point.)
Why teams leave Optimizely
Optimizely crossed $400M in annual revenue in early 2024. Over half that revenue now comes from customers buying multiple products. The company isn’t just an A/B testing tool anymore. It sells a whole bundle now: CMS, commerce, marketing automation, the works.
That pivot has been great for enterprise. Forrester ranked Optimizely #1 for experience optimization in Q4 2024. But it left smaller teams behind.
The complaints on G2 tell the story. Verified reviewers mention $24K surprise renewals, revenue-based pricing that scales unpredictably, and paying for features they never use. One reviewer reported spending $66K on products that were missing basic features they’d requested.
If you’re looking for a deep dive on one specific competitor, check our VWO vs Optimizely comparison.
Three reasons cover about 90% of switches:
- Price. Optimizely starts at roughly $36,000/year. Typical enterprise deals run $50,000 to $200,000+. That’s not a rounding error for most marketing budgets.
- Complexity. The platform has grown into something that needs dedicated people to manage. If you just want to test headlines, you’re paying for a battleship when you need a speedboat.
- The testing customer got lost. As Optimizely expanded into CMS and commerce, the team that just wants simple A/B testing tools became a shrinking share of their customer base.
Our take: Optimizely is worth every penny if you’re running 50+ tests a month with a dedicated team. Most teams aren’t. And that’s the whole problem.
Quick comparison table
| Tool | Best for | Starting price | Key strength | G2 rating |
|---|---|---|---|---|
| Kirro | Small teams, solo founders | EUR 99/month | 3-minute setup, 9KB script | New |
| VWO | Mid-market marketing teams | ~$299/month | Built-in heatmaps + recordings | 4.2/5 |
| Convert | Privacy-first teams | $399/month | GDPR/HIPAA native | 4.6/5 |
| GrowthBook | Developer teams | Free (self-hosted) | Open source, data warehouse | 4.3/5 |
| AB Tasty/Kameleoon | European enterprise | ~$25K/year (Kameleoon) | EU data residency, AI testing | 4.4/5 |
| LaunchDarkly | Feature flag workflows | Custom | Progressive rollouts, CI/CD | 4.5/5 |
Looking for an even broader list? See our best A/B testing tools roundup, the CRO tools comparison by category, or the full CRO software guide.
1. Kirro: best for small teams and solo founders
Full disclosure: we built Kirro. But we also built it because we kept hearing the same thing from small teams. “VWO is too expensive.” “Optimizely’s setup took weeks.” “Google Optimize died and nothing replaced it.”
What Kirro actually does:
- Visual editor. Click on your live site. Change a headline, button, or image. No code.
- GA4 integration. Your existing analytics goals become your test goals. If you track purchases in GA4, Kirro picks those up automatically.
- Bayesian statistics. Results shown as “Version B has an 89% chance of winning.” No p-values. No statistics degree.
- 9KB script. Most competitors load 100-200KB. Kirro’s script has zero measurable impact on page speed.
- GTM one-click install. Already using Google Tag Manager? One click and you’re running.
Where Kirro wins over Optimizely: Setup time (three minutes vs weeks), price transparency (one plan, one price), and page speed impact.
Where Optimizely still wins: Multivariate testing at scale, server-side testing, website personalization engine, CMS integration. If your team runs 50+ tests monthly with dedicated CRO people, Optimizely earns its price tag.
Kirro is not for enterprise CRO teams with 47 variables to test. It’s for the marketer who has 30 minutes between meetings and wants to know if the new headline works. Try it free for 30 days.
2. VWO: best for mid-market teams
VWO has been the default “cheaper Optimizely” recommendation for years. And the G2 data backs it up:
| Metric | VWO | Optimizely |
|---|---|---|
| Overall rating | 8.8/10 (413 reviews) | 8.0/10 (200 reviews) |
| A/B testing | 9.0/10 | 9.0/10 |
| Ease of setup | 8.6/10 | 8.0/10 |
| Support quality | 8.9/10 | 8.0/10 |
| Heatmaps | 7.6/10 | 5.7/10 |
A/B testing scores are identical. Where VWO pulls ahead: setup, support, and built-in analytics like heatmaps and session recordings. No separate Hotjar subscription needed.
Where Optimizely still wins: Mobile testing (8.9 vs 7.5), enterprise governance, and deeper personalization.
The big news: VWO and AB Tasty merged in January 2026 under Everstone Capital. Combined: $100M+ revenue, 4,000+ customers. The free tier is gone. Pricing is moving behind sales walls. VWO is heading upmarket, fast.
As Mida.so noted: “SMBs seeking accessible, no-friction testing tools now lack mainstream options.” Keep that in mind before you sign a long contract.
For a deeper dive, read our full VWO and Optimizely head-to-head comparison.
3. Convert: best for privacy-first teams
Convert doesn’t get the marketing buzz of VWO or Optimizely. But ask CRO practitioners which tool they actually recommend, and Convert keeps coming up. Peep Laja (CXL founder) calls it “perfect for small to medium-size clients doing in-house optimization.”
The pitch is simple: privacy as the product, not a badge. No personal data stored. GDPR and HIPAA baked into the architecture. And their support team runs live chat that actually helps, which is rare in this space.
Starts at $399/month. Not cheap, but you’re paying for the real thing.
If you’re in healthcare, finance, or anywhere GDPR enforcement has real teeth, Convert deserves a close look. Optimizely has more features, but Convert isn’t trying to be a full platform. It does one thing and does it carefully.
The CRO community has noticed. Read our full Convert review for more detail.
4. GrowthBook: best for developer teams (free)
Most open-source A/B testing tools are code-only. GrowthBook added a visual editor (WYSIWYG), which is a big deal. It means your marketing team can run tests without filing engineering tickets.
Free if you self-host. Cloud version starts at $75/month.
The real appeal for engineering teams: data warehouse integration. GrowthBook connects to your existing BigQuery, Snowflake, or Redshift. Your test results live where your other data lives. No separate silo. Plus it bundles feature flags with A/B testing in one package.
Fair warning: if nobody on your team can deploy a Docker container, GrowthBook isn’t for you. The visual editor helps marketers run tests, but setup and maintenance need engineering time. For non-technical teams, Kirro or VWO are a better fit.
5. AB Tasty and Kameleoon: best for European enterprise
AB Tasty no longer exists as a standalone product. It merged with VWO in January 2026. If you’re an existing AB Tasty customer, start asking questions now. Where does your account go? What happens to pricing? Which features survive? The dust hasn’t settled yet.
Kameleoon is the one still standing independently. Based in France, it offers server-side testing, AI-powered personalization, and starts around $25,000/year.
Where they win: EU data residency, GDPR-native architecture, and AI-driven testing that automatically adjusts traffic allocation.
Where Optimizely still wins: Broader ecosystem, US market presence, CMS integration, and a deeper bench of third-party agencies who know the platform.
For European teams where data residency isn’t optional, Kameleoon is worth evaluating. For everyone else, the price and complexity put it in the same league as Optimizely itself. You’d be switching luxury cars, not downsizing.
6. LaunchDarkly: best for feature flag workflows
If you’re searching for an Optimizely alternative and you land on LaunchDarkly, pause for a second. These tools solve different problems.
LaunchDarkly is developer infrastructure. Progressive rollouts, kill switches, CI/CD integration. A/B testing is a secondary feature, not the core product.
Where LaunchDarkly wins: Feature flag management, gradual rollouts, and engineering workflows. If your team ships code multiple times a day and wants to control who sees what, LaunchDarkly is purpose-built for that.
Where Optimizely still wins: Marketing-friendly visual testing, testing multiple things at once, personalization, and anything that doesn’t require writing code.
The honest take: If you’re a marketer looking for “something simpler than Optimizely,” LaunchDarkly will make your life harder, not easier. It’s built for a different person. For marketers, look at Kirro, VWO, or Convert instead. For split testing software that works at the code level, LaunchDarkly is strong.
How to pick the right Optimizely alternative
Every other “Optimizely alternatives” article lists tools in order and says “pick the one you like.” That’s not helpful. The right alternative depends on your specific switching reason.
Switching because of price? Kirro (EUR 99/month) or GrowthBook (free). Biggest savings, smallest learning curve.
Switching because of complexity? Kirro has the simplest setup (three minutes, no dev needed). VWO has more features but still a gentler learning curve than Optimizely.
Switching for privacy or compliance? Convert was built privacy-first. Kameleoon offers EU data residency. Both take compliance seriously, not as a marketing checkbox.
Switching because your dev team wants more control? GrowthBook is open source and free. LaunchDarkly is the feature flag standard.
Not actually switching, just exploring? That’s fine. Optimizely is still the Forrester-ranked #1 enterprise testing platform. If you have the budget and the team, it’s genuinely excellent at what it does. See our full CRO tools list for more options.
Our take: Two of the five switching reasons point to Kirro. That’s not an accident. We built it because the gap between “free but complicated” and “$36K/year enterprise” was embarrassingly wide. Try it for 30 days and see if it fills that gap for you.
Migration tips: switching from Optimizely
Switching A/B testing tools isn’t like switching email apps. You can’t export your Optimizely tests and import them somewhere else.
A few things nobody warns you about:
You’ll lose historical test data. There’s no universal export format. Screenshot your important results before you leave. Export any reports you might need later.
Retraining takes longer than you think. Even if the new tool is simpler, people need time to adjust. Budget 2-4 weeks before your team is running tests at the old pace.
Integration gaps will surprise you. That custom Optimizely integration your dev team built three years ago? It won’t magically work with the new tool. Audit your integrations before you commit.
The TCO trap is real. A tool that costs less per month can cost more overall if the migration drags on. C2 Group puts it bluntly: “Assume you’ll spend at least 10x a tool’s license cost in staffing to manage it.” Splitbase says operating any testing tool costs a minimum of 4x the tool price.
That 10x number sounds wild. But it covers training, integration, ongoing management, and the dead time when nobody’s testing during the switch. This is why other “alternatives” articles miss the point. They compare sticker prices. They should compare what year one actually costs.
With Kirro, the migration story is different. Paste a script, pick a page, start testing. No implementation project. No multi-week onboarding. No integration audit. If your old Optimizely setup was simple (just client-side A/B tests), you could be running new tests the same afternoon.
For more on the real cost picture, check our Optimizely pricing breakdown.
FAQ
What does Optimizely do?
Optimizely is a big platform: A/B testing, personalization, content management, and commerce tools all bundled together. Most teams searching for alternatives only need the A/B testing piece.
You’re not replacing the whole platform. You’re replacing one function that Optimizely charges enterprise prices for.
What are cheaper alternatives to Optimizely?
Kirro (EUR 99/month), GrowthBook (free, self-hosted), VWO (~$299/month), and Convert ($399/month) are all dramatically cheaper than Optimizely’s $36,000/year minimum. The cheapest option that doesn’t require a developer is Kirro. The cheapest option overall is GrowthBook, but you’ll need someone technical to set it up.
How does VWO compare to Optimizely?
VWO scores higher on G2 for ease of setup (8.6 vs 8.0) and customer support (8.9 vs 8.0). Core A/B testing is identical (both score 9.0). VWO costs roughly 3-6x less for similar core testing capabilities. The big caveat: VWO merged with AB Tasty in January 2026 and is moving upmarket. Pricing and features may change. We break it all down in the VWO vs Optimizely deep dive.
Which Optimizely alternatives are best for developers vs marketers?
Developers should look at GrowthBook (open source, data warehouse native) or LaunchDarkly (feature flags, progressive rollouts). Marketers should look at Kirro (simplest visual editor, GA4 integration) or VWO (most features without writing code). The biggest mistake here is picking a tool built for the wrong person. Your marketing team won’t enjoy LaunchDarkly. Your engineers won’t need a visual editor.
Is Google Optimize still available?
No. Google Optimize shut down in September 2023, affecting 2-3 million websites. Google chose not to rebuild it for GA4. The gap it left still hasn’t been properly filled. Our Google Optimize alternatives guide covers the full list of replacements.
Randy Wattilete
CRO expert and founder with nearly a decade running conversion experiments for companies from early-stage startups to global brands. Built programs for Nestlé, felyx, and Storytel. Founder of Kirro (A/B testing).
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