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Testing · head to head

Selenium vs Split

Selenium logo

Selenium

Testing

Browser automation framework and the W3C WebDriver standard

From
Free
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

  • Only Selenium has a free tier, so it costs nothing to try first.
  • Each has a real cost: Selenium flaky tests are the standing complaint: explicit waits and synchronisation are the tester’s job, where newer tools handle it automatically; 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: Selenium covers W3C WebDriver, 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 Selenium and Split actually diverge.

Attributes where Selenium and Split differ
AttributeSeleniumSplit
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsLinux, macOS, Windows, WebWeb, API, iOS, Android, Java, Node.js, Python, Go, .NET

Identical on both: user rating (Not yet rated), category (Testing).

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 Selenium

  • W3C WebDriver
  • Many language bindings
  • Selenium Grid
  • Broad browser support

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.

Selenium

  • Cross-browser testing where Safari and legacy browsers must be coverednot Split
  • Teams whose test suites are written in Java or C# rather than JavaScriptnot Split
  • Distributing a large suite across a grid of machinesnot Split

Split

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

Where each one falls short

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

Selenium

  • Flaky tests are the standing complaint: explicit waits and synchronisation are the tester’s job, where newer tools handle it automatically
  • Setup involves drivers, versions and grid infrastructure that Playwright and Cypress bundle away
  • Slower to run than tools that talk to browsers over a debugging protocol rather than WebDriver

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

Selenium

Free
  • SeleniumFree
    • Full functionality
    • Unlimited tests
    • Community support

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 Selenium if

  • You need w3c webdriver.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Web.
  • You also want many language bindings.
Selenium 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 Selenium or Split better?
Neither clearly leads. Selenium starts at Free and Split at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Selenium or Split?
Selenium has a free tier; the other does not. Paid plans start at Free for Selenium and On request for Split.
Does Selenium or Split run on more platforms?
Selenium runs on Linux, macOS, Windows, Web. Split runs on Web, API, iOS, Android, Java, Node.js, Python, Go, .NET.
Can I use Selenium for free?
Yes. Selenium has a free tier, so you can try it without paying. Split starts at On request.
What is Selenium best used for?
Selenium is most often used for cross-browser testing where safari and legacy browsers must be covered, teams whose test suites are written in java or c# rather than javascript, distributing a large suite across a grid of machines. Of those, cross-browser testing where safari and legacy browsers must be covered and teams whose test suites are written in java or c# rather than javascript are not what Split is typically brought in for.
What can Selenium do that Split cannot?
Selenium covers W3C WebDriver, Many language bindings, Selenium Grid, Broad browser support. Split covers Feature flags with targeting, Metrics impact engine, Guardrail metrics, Statistical significance testing.

Answered from the vendors’ own pages

Selenium: Is Selenium free?

Yes, open source with no licence fee. Paid costs come from grid infrastructure or services like BrowserStack.

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.

Selenium: Selenium or Playwright?

Playwright handles waiting automatically and is faster to set up, which removes most flakiness complaints. Selenium wins on language breadth, browser coverage including Safari, and existing suites you already have.

Split: Can I buy just feature flags?

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

Selenium: Is Selenium still relevant?

Yes. Its WebDriver protocol is a W3C standard implemented by every major browser, and very large existing suites are not rewritten cheaply.

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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