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Developer Tools · head to head

Atlantis vs Finxact

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
Finxact logo

Finxact

Technology

Cloud native core banking, sold as Finxact from Fiserv since the 2022 acquisition

From
On request
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.; Finxact fiserv sells several core platforms, so a buyer should demand written investment and support commitments for Finxact specifically rather than trusting that the surviving brand implies a protected roadmap.
  • They diverge on capability: Atlantis covers Pull request plans, Finxact covers Cloud native core.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Atlantis and Finxact actually diverge.

Attributes where Atlantis and Finxact differ
AttributeAtlantisFinxact
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsLinux, Docker, Kubernetes, Self-hostedWeb, API, Cloud
CategoryDeveloper ToolsTechnology

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 Finxact

  • Cloud native core
  • Real time posting
  • Configurable product definitions
  • Fiserv ecosystem access
  • Embedded banking support
  • Open API model
  • Multi tenant deployment
  • Regulatory reporting hooks

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

Finxact

  • A United States regional bank replacing a legacy core but unwilling to take supplier viability risk on an independent challengernot Atlantis
  • A community bank launching an embedded banking or sponsor bank programme on modern railsnot Atlantis
  • An institution already running Fiserv card and payment services that wants the core on the same vendor relationshipnot Atlantis
  • A bank standing up a new digital brand on a clean core while leaving the existing back book in placenot 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.

Finxact

  • Fiserv sells several core platforms, so a buyer should demand written investment and support commitments for Finxact specifically rather than trusting that the surviving brand implies a protected roadmap.
  • Core migration is a multi year programme where the licence is a small share of total cost against integration, data migration and parallel running.
  • Buying the core from Fiserv strengthens a relationship that already covers cards and payments, which weakens your negotiating position across the whole estate at renewal.
  • It is a United States product with United States regulatory and product assumptions, so international banks get little from it.
  • Being part of a very large vendor changes the service experience: the responsiveness that made Finxact attractive as a startup is not guaranteed inside a company of Fiserv's scale.

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

Finxact

On request
  • Finxact from Fiserv$undefined/year
    • Quoted per institution, commonly on accounts or asset size
    • Implementation and integration costs typically exceed the licence fee
    • Bundled commercially with other Fiserv services in many deals

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 Finxact if

  • You need cloud native core.
  • You work on Web, API, Cloud.
  • You also want real time posting.
Finxact review

Questions people ask

Is Atlantis or Finxact better?
Neither clearly leads. Atlantis starts at Free and Finxact at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Atlantis or Finxact?
Atlantis has a free tier; the other does not. Paid plans start at Free for Atlantis and On request for Finxact.
Does Atlantis or Finxact run on more platforms?
Atlantis runs on Linux, Docker, Kubernetes, Self-hosted. Finxact runs on Web, API, Cloud.
Can I use Atlantis for free?
Yes. Atlantis has a free tier, so you can try it without paying. Finxact 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 Finxact is typically brought in for.
What can Atlantis do that Finxact cannot?
Atlantis covers Pull request plans, Comment driven apply, Workspace locking, Policy checking. Finxact covers Cloud native core, Real time posting, Configurable product definitions, Fiserv ecosystem access.

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.

Finxact: Is Finxact still sold under its own name?

Yes. Fiserv acquired it in 2022 and continues to market it as Finxact from Fiserv, winning named core deals with it.

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.

Finxact: Is it genuinely cloud native?

Yes, API first with real time posting on public cloud, rather than a hosted version of a legacy core.

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.

Finxact: How long is a migration?

Plan in years. Even a focused deployment is a multi year programme once integration and data migration are counted.

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.

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