Is Atlantis or Insomnia better?

Neither clearly leads. Atlantis starts at Free and Insomnia at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Atlantis or Insomnia?

Atlantis starts at Free and Insomnia at Free.

Does Atlantis or Insomnia run on more platforms?

Atlantis runs on Linux, Docker, Kubernetes, Self-hosted. Insomnia runs on Windows, MacOS, Linux, Web.

Can I use Atlantis for free?

Both have a free tier, so you can try either at no cost before committing.

What is Atlantis best used for?

Atlantis is most often used for making terraform review meaningful by putting the actual plan output in front of the approver, removing local applies and the credential sprawl that comes with every engineer holding production keys, getting pull request driven infrastructure without paying a per-user subscription for a hosted platform, enforcing conftest policies as a blocking check before an apply can run. Of those, making terraform review meaningful by putting the actual plan output in front of the approver and removing local applies and the credential sprawl that comes with every engineer holding production keys are not what Insomnia is typically brought in for.

What can Atlantis do that Insomnia cannot?

Atlantis covers Pull request plans, Comment driven apply, Workspace locking, Policy checking. Insomnia covers REST API Client, GraphQL Support, gRPC Support, GitHub.

Developer Tools · head to head

Atlantis vs Insomnia

Atlantis

Developer Tools

Runs Terraform plan and apply from pull request comments, self-hosted and free

From: Free
Rated: -

Full review Website

Insomnia

Testing

REST and GraphQL API client for development and testing

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: Atlantis there is no company, no service level agreement and no paid support at any price, and the six maintainers are volunteers with day jobs, which some risk committees will not accept for a component holding production cloud credentials.; Insomnia git Sync on the free tier covers up to 3 users only
They diverge on capability: Atlantis covers Pull request plans, Insomnia covers REST API Client.
Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Atlantis and Insomnia actually diverge.

Attributes where Atlantis and Insomnia differ
Attribute	Atlantis	Insomnia
Pricing model	Open source, no licence fee	freemium
Platforms	Linux, Docker, Kubernetes, Self-hosted	Windows, MacOS, Linux, Web
Category	Developer Tools	Testing
Founded	Unknown	2010

Identical on both: starting price (Free), free tier (Yes), 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 Atlantis

Pull request plans
Comment driven apply
Workspace locking
Policy checking
Multi-platform webhooks
Custom workflows

Only in Insomnia

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

What people use each for

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

Atlantis

Making Terraform review meaningful by putting the actual plan output in front of the approvernot Insomnia
Removing local applies and the credential sprawl that comes with every engineer holding production keysnot Insomnia
Getting pull request driven infrastructure without paying a per-user subscription for a hosted platformnot Insomnia
Enforcing Conftest policies as a blocking check before an apply can runnot Insomnia

Insomnia

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

Where each one falls short

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

Atlantis

There is no company, no service level agreement and no paid support at any price, and the six maintainers are volunteers with day jobs, which some risk committees will not accept for a component holding production cloud credentials.
The security surface is inherently sharp, because it is an internet-reachable webhook endpoint that executes applies with privileged credentials, gated by pull request comment authorisation that is coarse next to a real policy engine.
It is stateful, holding a working directory and lock database on local disk, so high availability and horizontal scaling are awkward and you own upgrades, webhook plumbing, secret rotation and the host itself.
It lacks the features that distinguish the commercial alternatives, with no native drift detection, no cost estimation, no managed state interface and no policy engine beyond the Conftest integration.
Terragrunt and monorepo layouts are not first-class, requiring hand-written custom workflows and repository configuration that becomes a growing maintenance burden as the number of repositories increases.

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

Pricing, plan by plan

Atlantis

Free

AtlantisFree
- Apache-2.0, no usage limits and no seat count
- No commercial edition and no paid support tier
- Community support through GitHub and the CNCF Slack channel

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

Which should you pick?

Choose Atlantis if

You need pull request plans.
You want to start without paying.
You work on Linux, Docker, Kubernetes, Self-hosted.
You also want comment driven apply.

Atlantis review

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

Questions people ask

Is Atlantis or Insomnia better?: Neither clearly leads. Atlantis starts at Free and Insomnia at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Atlantis or Insomnia?: Atlantis starts at Free and Insomnia at Free.
Does Atlantis or Insomnia run on more platforms?: Atlantis runs on Linux, Docker, Kubernetes, Self-hosted. Insomnia runs on Windows, MacOS, Linux, Web.
Can I use Atlantis for free?: Both have a free tier, so you can try either at no cost before committing.
What is Atlantis best used for?: Atlantis is most often used for making terraform review meaningful by putting the actual plan output in front of the approver, removing local applies and the credential sprawl that comes with every engineer holding production keys, getting pull request driven infrastructure without paying a per-user subscription for a hosted platform, enforcing conftest policies as a blocking check before an apply can run. Of those, making terraform review meaningful by putting the actual plan output in front of the approver and removing local applies and the credential sprawl that comes with every engineer holding production keys are not what Insomnia is typically brought in for.
What can Atlantis do that Insomnia cannot?: Atlantis covers Pull request plans, Comment driven apply, Workspace locking, Policy checking. Insomnia covers REST API Client, GraphQL Support, gRPC Support, GitHub.

Answered from the vendors’ own pages

Atlantis: Is there a company behind Atlantis?

No. It runs as a series of LF Projects under the Linux Foundation and is maintained by volunteers. There is no vendor to buy support from and no service level agreement.

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

Atlantis: Is it a CNCF project?

No. It uses a channel in the CNCF Slack, which is often misread as membership, but the project sits under LF Projects rather than the CNCF.

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

Atlantis: Does it work with OpenTofu?

Yes, there is a dedicated integration guide alongside Terraform, and it also has configuration for working with hosted Terraform backends.

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

Atlantis: What does it not do that a paid platform does?

Drift detection, cost estimation, a managed state and run interface, and a real policy engine. Atlantis does pull request plan and apply well and stops there.

Atlantis vs Insomnia

Atlantis

Insomnia

The short version

Where they differ

What each one covers

Only in Atlantis

Only in Insomnia

What people use each for

Atlantis

Insomnia

Where each one falls short

Atlantis

Insomnia

Pricing, plan by plan

Atlantis

Insomnia

Which should you pick?

Choose Atlantis if

Choose Insomnia if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Atlantis

More on Insomnia

Keep looking

Other head to heads