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Marketing · head to head

Optimizely vs Split

Optimizely logo

Optimizely

Marketing

Digital experience optimization

From
$10000/year
Rated
-
Full reviewWebsite
Split logo

Split

Testing

Feature flags tied to a metrics pipeline that attributes production impact to each release, now Harness FME

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Optimizely no pricing is published and no minimum is stated; Split split is now a module of the Harness platform and split.io redirects to harness.io, so buying it means entering a Harness commercial relationship rather than a standalone flag vendor contract.
  • They diverge on capability: Optimizely covers A/B testing, Split covers Feature flags with targeting.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Optimizely and Split actually diverge.

Attributes where Optimizely and Split differ
AttributeOptimizelySplit
Starting price$10000/yearOn request
PlatformsWeb, MobileWeb, API, iOS, Android, Java, Node.js, Python, Go, .NET
CategoryMarketingTesting
Founded2010Unknown

Identical on both: pricing model (quote), free tier (No), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Optimizely

  • A/B testing
  • Multivariate testing
  • Personalization
  • Feature management
  • Analytics
  • Google Analytics
  • Adobe Analytics
  • SOC2

Only in Split

  • Feature flags with targeting
  • Metrics impact engine
  • Guardrail metrics
  • Statistical significance testing
  • Event ingestion
  • SDKs and streaming updates
  • Audit and approvals
  • Harness platform integration

What people use each for

The jobs each tool is most often brought in to do.

Optimizely

  • A/B testing and experimentation across web and product experiencesnot Split
  • Feature flagging and personalisation for digital productsnot Split

Split

  • A product organisation that wants every release measured against conversion and latency by default, not only deliberate experimentsnot Optimizely
  • Running A/B tests with real statistical significance rather than comparing two dashboard linesnot Optimizely
  • Catching a regression at five per cent rollout because a guardrail metric fires before the change reaches everyonenot Optimizely
  • A team already committed to Harness for CI and CD that wants flags in the same platform and contractnot Optimizely

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Optimizely

  • No pricing is published and no minimum is stated
  • Every plan is individually packaged, so no two quotes are necessarily comparable
  • Reaching a figure requires a demo or sales conversation

Split

  • Split is now a module of the Harness platform and split.io redirects to harness.io, so buying it means entering a Harness commercial relationship rather than a standalone flag vendor contract.
  • Harness no longer publishes per-module prices, so an organisation that wants only feature management cannot get a list price and must negotiate a module out of a platform bundle.
  • The measurement engine needs traffic volume to reach significance, so a product with modest usage gets flags with an experimentation layer it will rarely be able to conclude anything from.
  • Metric attribution depends on correctly instrumented events flowing into Split, which is an integration project in its own right; without it you have paid for an experimentation platform and are using it as a flag switch.
  • As part of a larger DevOps suite the roadmap now competes with CI, CD, security and cloud cost modules for attention, so feature management is no longer the company’s single focus the way it was as an independent product.

Pricing, plan by plan

Optimizely

$10000/year
  • Enterprise$undefined/year
    • A/B testing
    • Personalization
    • Feature management

Split

On request
  • Harness FreeFree
    • Harness Open Source and community support
    • Intended for individuals and small teams
    • Feature management capability limited at this tier
  • Harness Essentials$undefined/year
    • Bundled DevOps modules including CI, CD, IaC and security testing
    • Standard support
    • Pricing requires contacting sales
  • Harness Enterprise$undefined/year
    • Mix and match from 15 or more modules including Feature Management and Experimentation
    • Premier support with a dedicated account manager
    • Higher pipeline concurrency and organisation limits

Which should you pick?

Choose Optimizely if

  • You need a/b testing.
  • You work on Web, Mobile.
  • You also want multivariate testing.
Optimizely review

Choose Split if

  • You need feature flags with targeting.
  • You work on Web, API, iOS, Android, Java, Node.js, Python, Go, .NET.
  • You also want metrics impact engine.
Split review

Questions people ask

Is Optimizely or Split better?
Neither clearly leads. Optimizely starts at $10000/year and Split at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Optimizely or Split?
Optimizely starts at $10000/year and Split at On request.
Does Optimizely or Split run on more platforms?
Optimizely runs on Web, Mobile. Split runs on Web, API, iOS, Android, Java, Node.js, Python, Go, .NET.
What is Optimizely best used for?
Optimizely is most often used for a/b testing and experimentation across web and product experiences, feature flagging and personalisation for digital products. Of those, a/b testing and experimentation across web and product experiences and feature flagging and personalisation for digital products are not what Split is typically brought in for.
What can Optimizely do that Split cannot?
Optimizely covers A/B testing, Multivariate testing, Personalization, Feature management. Split covers Feature flags with targeting, Metrics impact engine, Guardrail metrics, Statistical significance testing.

Answered from the vendors’ own pages

Optimizely: How much does Optimizely cost?

Optimizely does not publish pricing rates. The company states that every plan is individually packaged based on specific customer needs. Interested customers must request a demo or contact the sales team to receive customized pricing.

Source
Split: Is Split still called Split?

It is now sold as Harness Feature Management and Experimentation after the Harness acquisition, and split.io redirects to harness.io.

Optimizely: What is the pricing model for Optimizely?

Optimizely uses a custom enterprise pricing model rather than published rate cards. Pricing is determined through direct consultation with the sales team based on the customer's digital needs and feature requirements.

Source
Split: Can I buy just feature flags?

Not from a price list. Harness publishes bundle tiers and directs single-module buyers to sales.

Optimizely: Is there a free trial of Optimizely?

Optimizely does not specify free trial availability on its website. Customers interested in exploring the platform are directed to request a demo through the company's website to discuss trial options.

Source
Split: What does it do that a plain flag service does not?

It attributes changes in your product metrics to specific flags with statistical significance testing and alerts on guardrail metrics.

Split: Do we need a lot of traffic?

Yes. Statistical tests need volume to conclude, so low-traffic products get limited value from the measurement layer.

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