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Developer Tools · head to head

GNAT Pro vs Thanos

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
Thanos logo

Thanos

Cloud

Highly available Prometheus with long-term object storage

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only Thanos 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; Thanos several components — sidecar, store, querier, compactor, ruler — each with its own configuration and failure modes
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where GNAT Pro and Thanos differ
AttributeGNAT ProThanos
Starting priceOn requestFree
Pricing modelquoteOpen source, no licence fee
Free tierNoYes
PlatformsWebKubernetes, Linux, Docker
CategoryDeveloper ToolsCloud

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 Thanos does not also cover.

Only in Thanos

  • Global query
  • Object storage retention
  • Deduplication
  • Downsampling

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 Thanos
  • Developing automotive embedded systems with ISO-26262 compliancenot Thanos
  • Integrating Ada, C/C++, and Rust components in single codebasenot Thanos
  • Managing software supply chain vulnerabilities and SBOMsnot Thanos
  • Supporting long-lived software systems spanning decadesnot Thanos

Thanos

  • Querying metrics across many clusters or regions from one placenot GNAT Pro
  • Retaining metrics for years without local disk growthnot GNAT Pro
  • Removing the gap that appears when a single Prometheus instance restartsnot 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

Thanos

  • Several components — sidecar, store, querier, compactor, ruler — each with its own configuration and failure modes
  • The compactor is a common source of operational trouble and must not run twice against the same bucket
  • Query latency over object storage is meaningfully higher than local Prometheus
  • Object storage costs and API request charges become real at high volume

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Thanos

Free
  • ThanosFree
    • Full functionality
    • No usage limits
    • Community support

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose Thanos if

  • You need global query.
  • You want to start without paying.
  • You work on Kubernetes, Linux, Docker.
  • You also want object storage retention.
Thanos review

Questions people ask

Is GNAT Pro or Thanos better?
Neither clearly leads. GNAT Pro starts at On request and Thanos at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Thanos?
Thanos has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for Thanos.
Does GNAT Pro or Thanos run on more platforms?
GNAT Pro runs on Web. Thanos runs on Kubernetes, Linux, Docker.
Can I use Thanos for free?
Yes. Thanos 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 Thanos is typically brought in for.
What can GNAT Pro do that Thanos cannot?
Thanos covers Global query, Object storage retention, Deduplication, Downsampling.

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
Thanos: Is Thanos free?

Yes, open source and CNCF-incubating. Costs are the object storage it uses.

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
Thanos: Does Thanos replace Prometheus?

No. It runs alongside existing Prometheus servers, adding global query, deduplication and long-term storage.

Thanos: Thanos or VictoriaMetrics?

Thanos layers onto Prometheus using object storage and is the more established multi-cluster answer. VictoriaMetrics is a separate store aiming at lower resource use and fewer moving parts.

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