Developer Tools · head to head
Atlantis vs Splunk Enterprise Security
Atlantis
Developer Tools
Runs Terraform plan and apply from pull request comments, self-hosted and free
- From
- Free
- Free plan
- Yes
Splunk Enterprise Security
Cybersecurity
The platform for operational intelligence
- 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.; Splunk Enterprise Security splunk Enterprise Security is licensed separately from the Splunk platform, so a SIEM deployment needs both
- They diverge on capability: Atlantis covers Pull request plans, Splunk Enterprise Security covers Security monitoring.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Atlantis and Splunk Enterprise Security actually diverge.
| Attribute | Atlantis | Splunk Enterprise Security |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | Open source, no licence fee | subscription |
| Free tier | Yes | No |
| Platforms | Linux, Docker, Kubernetes, Self-hosted | Web, Api |
| Category | Developer Tools | Cybersecurity |
| Founded | Unknown | 2003 |
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 Splunk Enterprise Security
- Security monitoring
- Incident review
- Risk-based alerting
- Threat intelligence
- Investigation workbench
- MITRE ATT&CK mapping
- Automated response
- Compliance reporting
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 Splunk Enterprise Security
- Removing local applies and the credential sprawl that comes with every engineer holding production keysnot Splunk Enterprise Security
- Getting pull request driven infrastructure without paying a per-user subscription for a hosted platformnot Splunk Enterprise Security
- Enforcing Conftest policies as a blocking check before an apply can runnot Splunk Enterprise Security
Splunk Enterprise Security
- Running a security operations centre on Splunk indexed log datanot Atlantis
- Correlation searches, risk based alerting and incident investigationnot Atlantis
- Compliance reporting from pooled security telemetrynot 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.
Splunk Enterprise Security
- Splunk Enterprise Security is licensed separately from the Splunk platform, so a SIEM deployment needs both
- Splunk publishes no rate for Enterprise Security and directs buyers to contact a pricing expert
- UEBA, SOAR and automated threat analysis require the Premier edition rather than Essentials
- The platform underneath can be billed by ingest volume, workload or activity, so the total cost depends on a pricing model chosen at contract time rather than a list price
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
Splunk Enterprise Security
On request- Workload PricingFree
- Pay per compute
- Flexible scaling
- All features
- Ingest PricingFree
- Pay per GB ingested
- Predictable costs
- All features
- Entity PricingFree
- Pay per monitored entity
- Security focused
- All features
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 Splunk Enterprise Security if
- You need security monitoring.
- You work on Web, Api.
- You also want incident review.
Questions people ask
- Is Atlantis or Splunk Enterprise Security better?
- Neither clearly leads. Atlantis starts at Free and Splunk Enterprise Security at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Atlantis or Splunk Enterprise Security?
- Atlantis has a free tier; the other does not. Paid plans start at Free for Atlantis and On request for Splunk Enterprise Security.
- Does Atlantis or Splunk Enterprise Security run on more platforms?
- Atlantis runs on Linux, Docker, Kubernetes, Self-hosted. Splunk Enterprise Security runs on Web, Api.
- Can I use Atlantis for free?
- Yes. Atlantis has a free tier, so you can try it without paying. Splunk Enterprise Security 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 Splunk Enterprise Security is typically brought in for.
- What can Atlantis do that Splunk Enterprise Security cannot?
- Atlantis covers Pull request plans, Comment driven apply, Workspace locking, Policy checking. Splunk Enterprise Security covers Security monitoring, Incident review, Risk-based alerting, Threat intelligence.
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.
Splunk Enterprise Security: How much does Splunk Enterprise Security cost?
Splunk Enterprise Security pricing is not published. The product is available in Essentials Edition with threat detection, investigation, and response capabilities, and Premier Edition with UEBA, SOAR, and Automated Threat Analysis. Customers must contact Splunk sales for pricing quotes on either edition.
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.
Splunk Enterprise Security: What editions of Splunk Enterprise Security are available?
Splunk Enterprise Security offers Essentials Edition with threat detection, investigation, and response capabilities, and Premier Edition which adds UEBA (User and Entity Behavior Analytics), SOAR (Security Orchestration, Automation and Response), and Automated Threat Analysis.
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.
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.
Related pages
More on Splunk Enterprise Security
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