Softwr

Developer Tools · head to head

Atlantis vs SentinelOne Singularity

Atlantis logo

Atlantis

Developer Tools

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

From
Free
Free plan
Yes
Full reviewWebsite
SentinelOne Singularity logo

SentinelOne Singularity

Cybersecurity

Autonomous AI-powered endpoint security

From
$5.83/month
Free plan
No
Full reviewWebsite

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.; SentinelOne Singularity deployment and configuration requires professional services ($5,000 to $25,000)
  • They diverge on capability: Atlantis covers Pull request plans, SentinelOne Singularity covers Behavioral AI.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Atlantis and SentinelOne Singularity actually diverge.

Attributes where Atlantis and SentinelOne Singularity differ
AttributeAtlantisSentinelOne Singularity
Starting priceFree$5.83/month
Pricing modelOpen source, no licence feeUnknown
Free tierYesNo
PlatformsLinux, Docker, Kubernetes, Self-hostedWindows, macOS, Linux, Cloud, Mobile
CategoryDeveloper ToolsCybersecurity
FoundedUnknown2013

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 SentinelOne Singularity

  • Behavioral AI
  • Autonomous response
  • ActiveEDR
  • Storyline technology
  • Rollback remediation
  • Ranger IoT
  • Cloud workload protection
  • Identity security

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 SentinelOne Singularity
  • Removing local applies and the credential sprawl that comes with every engineer holding production keysnot SentinelOne Singularity
  • Getting pull request driven infrastructure without paying a per-user subscription for a hosted platformnot SentinelOne Singularity
  • Enforcing Conftest policies as a blocking check before an apply can runnot SentinelOne Singularity

SentinelOne Singularity

  • Endpoint Securitynot Atlantis
  • Edrnot Atlantis
  • Xdrnot 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.

SentinelOne Singularity

  • Deployment and configuration requires professional services ($5,000 to $25,000)
  • Optional modules like Ranger and Vigilance add to total cost of ownership
  • Complex pricing tiers make budgeting difficult for large deployments

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

SentinelOne Singularity

$5.83/month
  • Singularity Core$5.83/month per endpoint
    • Endpoint Protection Platform (EPP)
    • Malware prevention
    • Threat isolation
  • Singularity Control$6.67/month per endpoint
    • All Core features
    • Device control
    • Firewall control
  • Singularity Complete$8.25/month per endpoint
    • All Control features
    • Endpoint Detection and Response
    • XDR capabilities
  • Singularity Commercial$17.5/month per endpoint
    • All Complete features
    • Identity protection
    • Cloud protection

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 SentinelOne Singularity if

  • You need behavioral ai.
  • You work on Windows, macOS, Linux, Cloud, Mobile.
  • You also want autonomous response.
SentinelOne Singularity review

Questions people ask

Is Atlantis or SentinelOne Singularity better?
Neither clearly leads. Atlantis starts at Free and SentinelOne Singularity at $5.83/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Atlantis or SentinelOne Singularity?
Atlantis has a free tier; the other does not. Paid plans start at Free for Atlantis and $5.83/month for SentinelOne Singularity.
Does Atlantis or SentinelOne Singularity run on more platforms?
Atlantis runs on Linux, Docker, Kubernetes, Self-hosted. SentinelOne Singularity runs on Windows, macOS, Linux, Cloud, Mobile.
Can I use Atlantis for free?
Yes. Atlantis has a free tier, so you can try it without paying. SentinelOne Singularity starts at $5.83/month.
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 SentinelOne Singularity is typically brought in for.
What can Atlantis do that SentinelOne Singularity cannot?
Atlantis covers Pull request plans, Comment driven apply, Workspace locking, Policy checking. SentinelOne Singularity covers Behavioral AI, Autonomous response, ActiveEDR, Storyline technology.

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.

SentinelOne Singularity: What does SentinelOne Singularity XDR cover?

Singularity XDR unifies detection and response across endpoints, cloud, identity, network, and mobile, providing centralized visibility and automated response across all attack surfaces.

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.

SentinelOne Singularity: How does SentinelOne correlate data across security tools?

Singularity normalizes data from endpoints, identity, cloud, and third-party security tools into a unified data layer, enabling automatic correlation of signals without manual integration.

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.

SentinelOne Singularity: Can SentinelOne integrate with existing security tools?

Yes, Singularity Marketplace provides pre-built, one-click integrations with email, network, firewall, and SaaS security tools, avoiding vendor lock-in while extending detection capabilities.

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.

SentinelOne Singularity: What is the pricing model for SentinelOne Singularity?

SentinelOne pricing ranges from $5.83 to $17.50 per endpoint per month across five tiers, with optional add-on modules and enterprise pricing available on request.

Source
Share

Related pages

More on Atlantis

More on SentinelOne Singularity

Keep looking

Other head to heads