Softwr

Testing · head to head

Split vs VWO

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
VWO logo

VWO

Marketing

Experience Optimization Platform

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only VWO has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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.; VWO growth plan restricted to 1 workspace and 0 custom attributes
  • They diverge on capability: Split covers Feature flags with targeting, VWO covers A/B testing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Split and VWO actually diverge.

Attributes where Split and VWO differ
AttributeSplitVWO
Starting priceOn requestFree
Pricing modelquoteusage-based
Free tierNoYes
PlatformsWeb, API, iOS, Android, Java, Node.js, Python, Go, .NETWeb, iOS, Android, Server-side
CategoryTestingMarketing
FoundedUnknown2007

Identical on both: 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 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

Only in VWO

  • A/B testing
  • Multivariate testing
  • Heatmaps
  • Session recordings
  • Analytics
  • Google Analytics
  • Slack
  • SSL encryption

What people use each for

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

Split

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

VWO

  • A/B testing and multivariate testingnot Split
  • Conversion rate optimisationnot Split
  • Behavioural analytics and session recordingsnot Split
  • Feature experimentation and progressive rolloutsnot Split

Where each one falls short

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

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.

VWO

  • Growth plan restricted to 1 workspace and 0 custom attributes
  • Single Sign-On (SSO) and API access limited to Enterprise tier only
  • Growth plan offers only 8-hour first response time for support

Pricing, plan by plan

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

VWO

Free

No published plan breakdown. See the VWO review.

Which should you pick?

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

Choose VWO if

  • You need a/b testing.
  • You want to start without paying.
  • You work on Web, iOS, Android, Server-side.
  • You also want multivariate testing.
VWO review

Questions people ask

Is Split or VWO better?
Neither clearly leads. Split starts at On request and VWO at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Split or VWO?
VWO has a free tier; the other does not. Paid plans start at On request for Split and Free for VWO.
Does Split or VWO run on more platforms?
Split runs on Web, API, iOS, Android, Java, Node.js, Python, Go, .NET. VWO runs on Web, iOS, Android, Server-side.
Can I use VWO for free?
Yes. VWO has a free tier, so you can try it without paying. Split starts at On request.
What is Split best used for?
Split is most often used for a product organisation that wants every release measured against conversion and latency by default, not only deliberate experiments, running a/b tests with real statistical significance rather than comparing two dashboard lines, catching a regression at five per cent rollout because a guardrail metric fires before the change reaches everyone, a team already committed to harness for ci and cd that wants flags in the same platform and contract. Of those, a product organisation that wants every release measured against conversion and latency by default, not only deliberate experiments and running a/b tests with real statistical significance rather than comparing two dashboard lines are not what VWO is typically brought in for.
What can Split do that VWO cannot?
Split covers Feature flags with targeting, Metrics impact engine, Guardrail metrics, Statistical significance testing. VWO covers A/B testing, Multivariate testing, Heatmaps, Session recordings.

Answered from the vendors’ own pages

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.

VWO: Is there a free trial available?

Free for 30 days. No credit card required to start the trial.

Source
Split: Can I buy just feature flags?

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

VWO: Are there limits on users or metrics?

Run unlimited optimization at scale with no limit on variations, account users, metrics, session recordings, or integrations.

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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