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Braintrust vs GNAT Pro

Braintrust logo

Braintrust

Software Development

The active observability platform for agents

From
Free
Rated
-
Full reviewWebsite
GNAT Pro logo

GNAT Pro

Developer Tools

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

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Braintrust has a free tier, so it costs nothing to try first.
  • Each has a real cost: Braintrust enterprise plan pricing not published, requires custom quote; GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes

Where they differ

Only the attributes on which Braintrust and GNAT Pro actually diverge.

Attributes where Braintrust and GNAT Pro differ
AttributeBraintrustGNAT Pro
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
CategorySoftware DevelopmentDeveloper Tools

Identical on both: platforms (Web), user rating (Not yet rated).

What people use each for

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

Braintrust

  • Monitoring production AI agents for qualitynot GNAT Pro
  • Detecting patterns in agent failuresnot GNAT Pro
  • Defining quality expectations before shipping agentsnot GNAT Pro
  • Tracking prompts and tool calls in productionnot GNAT Pro

GNAT Pro

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

Where each one falls short

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

Braintrust

  • Enterprise plan pricing not published, requires custom quote
  • Pro plan includes 6-12 months free discount for startups only

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

Pricing, plan by plan

Braintrust

Free
  • StarterFree
    • $10 model credits monthly included
    • 1 GB processed data monthly
    • 10000 scores monthly
  • Pro$249/month
    • $249 model credits monthly included
    • 5 GB processed data monthly
    • 50000 scores monthly
  • Enterprise$null/month
    • Custom data retention and export capabilities
    • RBAC and premium support
    • On-premises or hosted solutions available

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Which should you pick?

Choose Braintrust if

  • You want to start without paying.
Braintrust review

Choose GNAT Pro if

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

GNAT Pro review

Questions people ask

Is Braintrust or GNAT Pro better?
Neither clearly leads. Braintrust starts at Free and GNAT Pro at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Braintrust or GNAT Pro?
Braintrust has a free tier; the other does not. Paid plans start at Free for Braintrust and On request for GNAT Pro.
Does Braintrust or GNAT Pro run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Braintrust for free?
Yes. Braintrust has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is Braintrust best used for?
Braintrust is most often used for monitoring production ai agents for quality, detecting patterns in agent failures, defining quality expectations before shipping agents, tracking prompts and tool calls in production. Of those, monitoring production ai agents for quality and detecting patterns in agent failures are not what GNAT Pro is typically brought in for.

Answered from the vendors’ own pages

Braintrust: Does Braintrust have a free plan?

Braintrust Starter plan is free and includes $10 model credits monthly, 1 GB processed data, 10000 scores monthly, and 14-day data retention with unlimited users and projects. No credit card required.

Source
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
Braintrust: How much does the Braintrust Pro plan cost?

Braintrust Pro plan costs $249 per month and includes $249 model credits, 5 GB processed data, 50000 scores monthly, and 30-day data retention. Qualifying startups receive 6-12 months free.

Source
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
Braintrust: What are Braintrust's overage charges?

Braintrust charges overage rates after monthly allocations: model credits beyond monthly allotment are charged at token rates, data overage is $4 per GB on Starter or $3 per GB on Pro, scores overage is $2.50 per 1000 on Starter or $1.50 per 1000 on Pro. Extended data retention beyond the included period costs $0.50 per GB per month.

Source
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