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Developer Tools · head to head

GNAT Pro vs VictoriaMetrics

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
VictoriaMetrics logo

VictoriaMetrics

Cloud

Fast, cost-effective time series database for metrics

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only VictoriaMetrics 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; VictoriaMetrics promQL compatibility is very close but not identical, and MetricsQL extensions do not port back
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where GNAT Pro and VictoriaMetrics differ
AttributeGNAT ProVictoriaMetrics
Starting priceOn requestFree
Pricing modelquoteOpen source, no licence fee
Free tierNoYes
PlatformsWebLinux, Docker, Kubernetes, Self-hosted
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 VictoriaMetrics does not also cover.

Only in VictoriaMetrics

  • PromQL compatible
  • Low resource use
  • Single binary or cluster
  • Remote write target

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

VictoriaMetrics

  • Keeping months or years of Prometheus metrics without the memory costnot GNAT Pro
  • High-cardinality metrics where Prometheus strugglesnot GNAT Pro
  • Consolidating metrics from many Prometheus instances into one queryable storenot 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

VictoriaMetrics

  • PromQL compatibility is very close but not identical, and MetricsQL extensions do not port back
  • Smaller community than Prometheus, so fewer guides and third-party integrations
  • The clustered version has meaningfully more moving parts than the single binary suggests
  • Some enterprise features sit outside the open-source offering

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

VictoriaMetrics

Free
  • VictoriaMetricsFree
    • Full functionality
    • No data limits
    • Community support

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose VictoriaMetrics if

  • You need promql compatible.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Self-hosted.
  • You also want low resource use.
VictoriaMetrics review

Questions people ask

Is GNAT Pro or VictoriaMetrics better?
Neither clearly leads. GNAT Pro starts at On request and VictoriaMetrics at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or VictoriaMetrics?
VictoriaMetrics has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for VictoriaMetrics.
Does GNAT Pro or VictoriaMetrics run on more platforms?
GNAT Pro runs on Web. VictoriaMetrics runs on Linux, Docker, Kubernetes, Self-hosted.
Can I use VictoriaMetrics for free?
Yes. VictoriaMetrics 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 VictoriaMetrics is typically brought in for.
What can GNAT Pro do that VictoriaMetrics cannot?
VictoriaMetrics covers PromQL compatible, Low resource use, Single binary or cluster, Remote write target.

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
VictoriaMetrics: Is VictoriaMetrics free?

The open-source version is free with no data limits. An enterprise edition and cloud service are paid.

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
VictoriaMetrics: Does it replace Prometheus?

It can, but most teams keep Prometheus for scraping and use VictoriaMetrics as the long-term store behind it.

VictoriaMetrics: Is PromQL fully supported?

Very nearly. It implements PromQL and extends it with MetricsQL, though a small number of edge-case behaviours differ.

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