Is Insomnia or Split better?

Neither clearly leads. Insomnia 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, Insomnia or Split?

Insomnia has a free tier; the other does not. Paid plans start at Free for Insomnia and On request for Split.

Does Insomnia or Split run on more platforms?

Insomnia runs on Windows, MacOS, Linux, Web. Split runs on Web, API, iOS, Android, Java, Node.js, Python, Go, .NET.

Can I use Insomnia for free?

Yes. Insomnia has a free tier, so you can try it without paying. Split starts at On request.

What is Insomnia best used for?

Insomnia is most often used for sending and debugging http, graphql and grpc requests, storing collections in git rather than a vendor cloud, mocking an api endpoint before it exists, running collections in ci with the inso cli. Of those, sending and debugging http, graphql and grpc requests and storing collections in git rather than a vendor cloud are not what Split is typically brought in for.

What can Insomnia do that Split cannot?

Insomnia covers REST API Client, GraphQL Support, gRPC Support, GitHub. Split covers Feature flags with targeting, Metrics impact engine, Guardrail metrics, Statistical significance testing.

Testing · head to head

Insomnia vs Split

Insomnia

Testing

REST and GraphQL API client for development and testing

From: Free
Rated: -

Full review Website

Split

Testing

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

From: On request
Rated: -

Full review Website

The short version

Only Insomnia has a free tier, so it costs nothing to try first.
Each has a real cost: Insomnia git Sync on the free tier covers up to 3 users only; 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: Insomnia covers REST API Client, 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 Insomnia and Split actually diverge.

Attributes where Insomnia and Split differ
Attribute	Insomnia	Split
Starting price	Free	On request
Pricing model	freemium	quote
Free tier	Yes	No
Platforms	Windows, MacOS, Linux, Web	Web, API, iOS, Android, Java, Node.js, Python, Go, .NET
Founded	2010	Unknown

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 Insomnia

REST API Client
GraphQL Support
gRPC Support
GitHub
GitLab
Slack
Windows support
MacOS 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.

Insomnia

Sending and debugging HTTP, GraphQL and gRPC requestsnot Split
Storing collections in Git rather than a vendor cloudnot Split
Mocking an API endpoint before it existsnot Split
Running collections in CI with the Inso CLInot Split
Environment management across staging and productionnot Split

Split

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

Where each one falls short

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

Insomnia

Git Sync on the free tier covers up to 3 users only
Mock servers are capped at 1,000 requests a month on free, then $10 per 25,000
Role-based access control requires Pro at $12 per user per month
SSO, SCIM and vault integrations are Enterprise only at $45 per user per month
Working without an account is limited to the local-only Scratch Pad

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

Insomnia

Free

EssentialsFree
- unlimited Cloud/Local projects
- up to 3 users with Git Sync
- 1,000 mock server requests/month
Pro$12/user/month
- unlimited users with Git Sync access
- unlimited organizations
- role-based access control
Enterprise$45/user/month
- Kong Konnect integration
- SSO (SAML/OIDC)
- SCIM provisioning

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 Insomnia if

You need rest api client.
You want to start without paying.
You work on Windows, MacOS, Linux, Web.
You also want graphql support.

Insomnia 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 Insomnia or Split better?: Neither clearly leads. Insomnia 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, Insomnia or Split?: Insomnia has a free tier; the other does not. Paid plans start at Free for Insomnia and On request for Split.
Does Insomnia or Split run on more platforms?: Insomnia runs on Windows, MacOS, Linux, Web. Split runs on Web, API, iOS, Android, Java, Node.js, Python, Go, .NET.
Can I use Insomnia for free?: Yes. Insomnia has a free tier, so you can try it without paying. Split starts at On request.
What is Insomnia best used for?: Insomnia is most often used for sending and debugging http, graphql and grpc requests, storing collections in git rather than a vendor cloud, mocking an api endpoint before it exists, running collections in ci with the inso cli. Of those, sending and debugging http, graphql and grpc requests and storing collections in git rather than a vendor cloud are not what Split is typically brought in for.
What can Insomnia do that Split cannot?: Insomnia covers REST API Client, GraphQL Support, gRPC Support, GitHub. Split covers Feature flags with targeting, Metrics impact engine, Guardrail metrics, Statistical significance testing.

Answered from the vendors’ own pages

Insomnia: How much does Insomnia cost?

Insomnia offers a free Essentials plan. Pro plans cost $12 per user per month with annual billing offering 17% savings. Enterprise plans cost $45 per user per month with support for up to 50 users self-serve; contact sales for larger teams.

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.

Insomnia: Is there a free version of Insomnia?

Yes, the Essentials plan is free and includes unlimited Cloud and Local projects, Git Sync for up to 3 users, 1,000 mock server requests per month, Inso CLI, E2EE, custom linting, plugins, and AI features.

Source

Split: Can I buy just feature flags?

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

Insomnia: What mock server request limits apply to Insomnia plans?

Essentials includes 1,000 mock server requests per month. Pro includes 10,000 requests per month. Enterprise includes unlimited mock server requests. Additional mock server requests beyond plan allowances cost $10 per 25,000 requests.

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.

Insomnia vs Split

Insomnia

Split

The short version

Where they differ

What each one covers

Only in Insomnia

Only in Split

What people use each for

Insomnia

Split

Where each one falls short

Insomnia

Split

Pricing, plan by plan

Insomnia

Split

Which should you pick?

Choose Insomnia if

Choose Split if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Insomnia

More on Split

Keep looking

Other head to heads