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Developer Tools · head to head

GNAT Pro vs HashiCorp Boundary

GNAT Pro logo

GNAT Pro

Developer Tools

Software development environments and toolchains for Ada, C/C++ and Rust

From
On request
Free plan
No
Full reviewWebsite
HashiCorp Boundary logo

HashiCorp Boundary

Cybersecurity

Identity-aware session broker for infrastructure access without distributing credentials

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only HashiCorp Boundary has a free tier, so it costs nothing to try first.
  • Each has a real cost: GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes; HashiCorp Boundary hashiCorp was acquired by IBM in February 2025 and Enterprise licensing now runs through IBM Passport Advantage; IBM has already retired HCP Vault Secrets, so Boundary's roadmap depends on IBM portfolio decisions rather than HashiCorp's own product strategy.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which GNAT Pro and HashiCorp Boundary actually diverge.

Attributes where GNAT Pro and HashiCorp Boundary differ
AttributeGNAT ProHashiCorp Boundary
Starting priceOn requestFree
Pricing modelquoteOpen source, no licence fee
Free tierNoYes
PlatformsWebLinux, macOS, Windows, Web
CategoryDeveloper ToolsCybersecurity

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 GNAT Pro

Nothing recorded that HashiCorp Boundary does not also cover.

Only in HashiCorp Boundary

  • Identity-based access
  • Just-in-time credentials
  • Dynamic host catalogues
  • Session recording
  • Transparent sessions
  • Multi-hop workers
  • Audit logging
  • Terraform provider

What people use each for

The jobs each tool is most often brought in to do.

GNAT Pro

  • Building certified avionics software meeting DO-178B/C standardsnot HashiCorp Boundary
  • Developing automotive embedded systems with ISO-26262 compliancenot HashiCorp Boundary
  • Integrating Ada, C/C++, and Rust components in single codebasenot HashiCorp Boundary
  • Managing software supply chain vulnerabilities and SBOMsnot HashiCorp Boundary
  • Supporting long-lived software systems spanning decadesnot HashiCorp Boundary

HashiCorp Boundary

  • A platform team replacing shared SSH keys and a bastion host so that leavers lose access the moment they are removed from the identity providernot GNAT Pro
  • Granting contractors time-boxed database access without ever issuing them a credential they could keepnot GNAT Pro
  • An estate where autoscaling replaces hosts continuously and a static access list is always out of datenot GNAT Pro
  • Producing session recordings as evidence for an audit that requires proof of who touched production and what they rannot GNAT Pro

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

GNAT Pro

  • No pricing published on website; requires contacting AdaCore directly for quotes
  • Vendor indicates per-user, per-year subscription model but does not disclose specific costs

HashiCorp Boundary

  • HashiCorp was acquired by IBM in February 2025 and Enterprise licensing now runs through IBM Passport Advantage; IBM has already retired HCP Vault Secrets, so Boundary's roadmap depends on IBM portfolio decisions rather than HashiCorp's own product strategy.
  • Enterprise pricing is not published anywhere, and the features most organisations actually need for compliance, notably session recording, are Enterprise only, so the free community edition is rarely the version you end up buying.
  • It solves access to infrastructure, not to applications; browser-based internal tools, SaaS admin consoles and APIs need a separate control, so Boundary is one component of a zero-trust programme rather than the whole thing.
  • Running it yourself means operating controllers, worker nodes and a Postgres database in a highly available configuration, and if that control plane is down nobody can reach production, which makes it a new critical dependency.
  • It is materially easier to adopt if you already run Vault and Terraform; teams without that ecosystem face a steeper learning curve than a device-based mesh product like Tailscale, for a similar access outcome.

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

HashiCorp Boundary

Free
  • Boundary Community EditionFree
    • MPL 2.0 open source
    • Self-hosted controllers and workers
    • Identity-based target access
  • Boundary Enterprise$undefined/year
    • Session recording and playback
    • Multi-hop and transparent sessions
    • Multi-tenancy via scopes

Which should you pick?

Choose GNAT Pro if

Nothing in the data separates GNAT Pro from HashiCorp Boundary on the points above - pick on price and on how each one feels to use.

GNAT Pro review

Choose HashiCorp Boundary if

  • You need identity-based access.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Web.
  • You also want just-in-time credentials.
HashiCorp Boundary review

Questions people ask

Is GNAT Pro or HashiCorp Boundary better?
Neither clearly leads. GNAT Pro starts at On request and HashiCorp Boundary at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or HashiCorp Boundary?
HashiCorp Boundary has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for HashiCorp Boundary.
Does GNAT Pro or HashiCorp Boundary run on more platforms?
GNAT Pro runs on Web. HashiCorp Boundary runs on Linux, macOS, Windows, Web.
Can I use HashiCorp Boundary for free?
Yes. HashiCorp Boundary has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is GNAT Pro best used for?
GNAT Pro is most often used for building certified avionics software meeting do-178b/c standards, developing automotive embedded systems with iso-26262 compliance, integrating ada, c/c++, and rust components in single codebase, managing software supply chain vulnerabilities and sboms. Of those, building certified avionics software meeting do-178b/c standards and developing automotive embedded systems with iso-26262 compliance are not what HashiCorp Boundary is typically brought in for.
What can GNAT Pro do that HashiCorp Boundary cannot?
HashiCorp Boundary covers Identity-based access, Just-in-time credentials, Dynamic host catalogues, Session recording.

Answered from the vendors’ own pages

GNAT Pro: How much does GNAT Pro cost?

GNAT Pro pricing is not published on the website. Customers must request a pricing quote by contacting AdaCore directly or speaking with a GNAT Pro expert.

Source
HashiCorp Boundary: Is Boundary open source?

The community edition is, under MPL 2.0. Boundary Enterprise is commercial and is now sold through IBM Passport Advantage.

GNAT Pro: What is GNAT Pro licensing model?

GNAT Pro is sold on a per-user, per-year basis with no license locks. Customers can request pricing for their specific needs.

Source
HashiCorp Boundary: Does it replace a VPN?

For infrastructure access, largely yes. It grants a session to a specific target rather than putting the user on a network, but it does not cover browser-based internal applications.

HashiCorp Boundary: What does Boundary Enterprise cost?

HashiCorp does not publish Boundary pricing. It is quoted, and since the IBM acquisition it is transacted on IBM licensing paper.

HashiCorp Boundary: Do I need Vault to use it?

No, but the just-in-time credential brokering that makes Boundary worthwhile depends on Vault or an equivalent secrets store.

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