Developer Tools · head to head
Atlantis vs Microsoft Defender for Endpoint
Atlantis
Developer Tools
Runs Terraform plan and apply from pull request comments, self-hosted and free
- From
- Free
- Free plan
- Yes
Microsoft Defender for Endpoint
Cybersecurity
Enterprise endpoint security built into Microsoft 365
- From
- On request
- Free plan
- No
The short version
- Only Atlantis has a free tier, so it costs nothing to try first.
- 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.; Microsoft Defender for Endpoint pricing not published on public websites; quote required from Microsoft sales
- They diverge on capability: Atlantis covers Pull request plans, Microsoft Defender for Endpoint covers Threat & vulnerability management.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Atlantis and Microsoft Defender for Endpoint actually diverge.
| Attribute | Atlantis | Microsoft Defender for Endpoint |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | Open source, no licence fee | quote |
| Free tier | Yes | No |
| Platforms | Linux, Docker, Kubernetes, Self-hosted | Windows, macOS, Linux, iOS, Android |
| Category | Developer Tools | Cybersecurity |
| Founded | Unknown | 1975 |
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 Atlantis
- Pull request plans
- Comment driven apply
- Workspace locking
- Policy checking
- Multi-platform webhooks
- Custom workflows
Only in Microsoft Defender for Endpoint
- Threat & vulnerability management
- Attack surface reduction
- Next-gen protection
- EDR
- Auto investigation
- Microsoft Threat Experts
- Threat analytics
- Secure score
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 Microsoft Defender for Endpoint
- Removing local applies and the credential sprawl that comes with every engineer holding production keysnot Microsoft Defender for Endpoint
- Getting pull request driven infrastructure without paying a per-user subscription for a hosted platformnot Microsoft Defender for Endpoint
- Enforcing Conftest policies as a blocking check before an apply can runnot Microsoft Defender for Endpoint
Microsoft Defender for Endpoint
- Enterprise endpoint security across Windows, macOS, Linux, Android, and iOS via Plans 1 or 2not Atlantis
- Small and medium-sized businesses using Microsoft Defender for Business as alternativenot Atlantis
- Organisations using Microsoft 365 E5 which includes Defender for Endpoint Plan 2not 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.
Microsoft Defender for Endpoint
- Pricing not published on public websites; quote required from Microsoft sales
- Defender for Endpoint Plan 1 and Plan 2 do not include server licenses; additional licensing required for server protection
- Specific feature differences between Plan 1 and Plan 2 require consulting Microsoft documentation
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
Microsoft Defender for Endpoint
On requestNo published plan breakdown. See the Microsoft Defender for Endpoint review.
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.
Choose Microsoft Defender for Endpoint if
- You need threat & vulnerability management.
- You work on Windows, macOS, Linux, iOS, Android.
- You also want attack surface reduction.
Questions people ask
- Is Atlantis or Microsoft Defender for Endpoint better?
- Neither clearly leads. Atlantis starts at Free and Microsoft Defender for Endpoint at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Atlantis or Microsoft Defender for Endpoint?
- Atlantis has a free tier; the other does not. Paid plans start at Free for Atlantis and On request for Microsoft Defender for Endpoint.
- Does Atlantis or Microsoft Defender for Endpoint run on more platforms?
- Atlantis runs on Linux, Docker, Kubernetes, Self-hosted. Microsoft Defender for Endpoint runs on Windows, macOS, Linux, iOS, Android.
- Can I use Atlantis for free?
- Yes. Atlantis has a free tier, so you can try it without paying. Microsoft Defender for Endpoint starts at On request.
- 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 Microsoft Defender for Endpoint is typically brought in for.
- What can Atlantis do that Microsoft Defender for Endpoint cannot?
- Atlantis covers Pull request plans, Comment driven apply, Workspace locking, Policy checking. Microsoft Defender for Endpoint covers Threat & vulnerability management, Attack surface reduction, Next-gen protection, EDR.
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.
Microsoft Defender for Endpoint: How is Microsoft Defender for Endpoint priced?
Defender for Endpoint is bundled into Microsoft 365 enterprise subscriptions. Plan 1 is included in Microsoft 365 E3, and Plan 2 is included in Microsoft 365 E5. Individual pricing is not published separately.
SourceAtlantis: 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.
Microsoft Defender for Endpoint: Does Microsoft Defender for Endpoint offer a trial?
Yes. A free trial is available for prospective customers to test the product before committing to a subscription.
SourceAtlantis: 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.
Microsoft Defender for Endpoint: What is the difference between Plan 1 and Plan 2?
Plan 1 (in E3) includes unified security tools, device controls, network protection, firewall, web/URL controls, APIs, SIEM connectors, and app controls. Plan 2 (in E5) adds endpoint detection and response, deception techniques, automatic attack disruption, exposure management, and threat intelligence.
SourceAtlantis: 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.
Related pages
More on Microsoft Defender for Endpoint
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