Developer Tools · head to head
Atlantis vs RAD Studio
Atlantis
Developer Tools
Runs Terraform plan and apply from pull request comments, self-hosted and free
- From
- Free
- Rated
- -
RAD Studio
Developer Tools
Cross-platform native app development with Delphi and C++Builder
- From
- $2000/perpetual
- Rated
- -
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.; RAD Studio professional edition costs $2,000 for the perpetual license plus $599 for year one maintenance, totaling $2,599 before tax
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Atlantis and RAD Studio actually diverge.
| Attribute | Atlantis | RAD Studio |
|---|---|---|
| Starting price | Free | $2000/perpetual |
| Pricing model | Open source, no licence fee | one-time |
| Free tier | Yes | No |
| Platforms | Linux, Docker, Kubernetes, Self-hosted | Web |
Identical on both: user rating (Not yet rated), category (Developer Tools).
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 RAD Studio
Nothing recorded that Atlantis does not also cover.
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 RAD Studio
- Removing local applies and the credential sprawl that comes with every engineer holding production keysnot RAD Studio
- Getting pull request driven infrastructure without paying a per-user subscription for a hosted platformnot RAD Studio
- Enforcing Conftest policies as a blocking check before an apply can runnot RAD Studio
RAD Studio
- Building Windows desktop applications with VCL componentsnot Atlantis
- Creating iOS and Android apps from shared Delphi codebasenot Atlantis
- Connecting to Oracle databases through FireDAC connectivitynot Atlantis
- Building REST web services that run on Linux serversnot 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.
RAD Studio
- Professional edition costs $2,000 for the perpetual license plus $599 for year one maintenance, totaling $2,599 before tax
- Enterprise edition steps up to $3,400 license plus $1,199 maintenance, and Architect edition to $4,416 license plus $2,183 maintenance
- The perpetual license only entitles the buyer to updates for one year; continued access to new updates and upgrades requires an annually renewable Update Subscription
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
RAD Studio
$2000/perpetual- Professional Edition$2000/perpetual
- Perpetual License
- First year maintenance $599
- Total $2,599 + Tax
- Enterprise Edition$3400/perpetual
- Perpetual License
- First year maintenance $1,199
- Total $4,599 + Tax
- Architect Edition$4416/perpetual
- Perpetual License
- First year maintenance $2,183
- Total $6,599 + Tax
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 RAD Studio if
Nothing in the data separates RAD Studio from Atlantis on the points above - pick on price and on how each one feels to use.
Questions people ask
- Is Atlantis or RAD Studio better?
- Neither clearly leads. Atlantis starts at Free and RAD Studio at $2000/perpetual, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Atlantis or RAD Studio?
- Atlantis has a free tier; the other does not. Paid plans start at Free for Atlantis and $2000/perpetual for RAD Studio.
- Does Atlantis or RAD Studio run on more platforms?
- Atlantis runs on Linux, Docker, Kubernetes, Self-hosted. RAD Studio runs on Web.
- Can I use Atlantis for free?
- Yes. Atlantis has a free tier, so you can try it without paying. RAD Studio starts at $2000/perpetual.
- 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 RAD Studio is typically brought in for.
- What can Atlantis do that RAD Studio cannot?
- Atlantis covers Pull request plans, Comment driven apply, Workspace locking, Policy checking.
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.
RAD Studio: How much does RAD Studio cost?
RAD Studio uses perpetual licensing: Professional Edition $2,000 perpetual license + $599 first year maintenance ($2,599 total + tax). Enterprise Edition $3,400 license + $1,199 maintenance ($4,599 total + tax). Architect Edition $4,416 license + $2,183 maintenance ($6,599 total + tax).
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.
RAD Studio: What is the difference between RAD Studio editions?
Professional Edition ($2,599 total + tax) targets individual developers. Enterprise Edition ($4,599 total + tax) adds multi-tier app capabilities. Architect Edition ($6,599 total + tax) includes advanced database and cloud features. All three include perpetual licenses.
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.
RAD Studio: Does RAD Studio offer Kai AI integration and discounts?
Yes, adding Kai AI to any edition provides discounts: 25% off Professional ($2,136 + tax), 30% off Enterprise ($3,394 + tax), and 40% off Architect ($4,109 + tax). This promotion is active through August 31, 2026.
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.
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