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CloudAMQP vs GNAT Pro

CloudAMQP logo

CloudAMQP

Technology

Managed RabbitMQ and LavinMQ clusters, hosted and fully managed

From
Free
Free plan
Yes
Full reviewWebsite
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

The short version

  • Only CloudAMQP has a free tier, so it costs nothing to try first.
  • Each has a real cost: CloudAMQP free tier messaging limits are low: 1-2M messages/month; GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where CloudAMQP and GNAT Pro differ
AttributeCloudAMQPGNAT Pro
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
CategoryTechnologyDeveloper 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.

CloudAMQP

  • Message queue servicesnot GNAT Pro
  • Message brokers for distributed systemsnot GNAT Pro
  • RabbitMQ and LavinMQ hostingnot GNAT Pro
  • Asynchronous task processingnot GNAT Pro

GNAT Pro

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

Where each one falls short

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

CloudAMQP

  • Free tier messaging limits are low: 1-2M messages/month
  • Free tier connection limits are restrictive: 20-40
  • Multi-tenant plans have queue limits (200-2,000 max)
  • Dedicated plans expensive at scale: up to $14,995-$17,495/month
  • Extra disk space add-on at $0.35/month per GB may add significant cost

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

CloudAMQP

Free
  • LavinMQ - Loyal Lemming (Free)Free
    • 2 million messages per month
    • 40 connection limit
    • 200 queue maximum
  • RabbitMQ - Little Lemur (Free)Free
    • 1 million messages per month
    • 20 connection limit
    • 100 queue maximum
  • LavinMQ - Elegant Ermine$19/month
    • 20 million messages per month
    • 200 connections
    • 2,000 queue maximum
  • RabbitMQ - Tough Tiger$19/month
    • 10 million messages per month
    • 100 connections
    • 1,000 queue maximum

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Which should you pick?

Choose CloudAMQP if

  • You want to start without paying.
CloudAMQP review

Choose GNAT Pro if

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

GNAT Pro review

Questions people ask

Is CloudAMQP or GNAT Pro better?
Neither clearly leads. CloudAMQP 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, CloudAMQP or GNAT Pro?
CloudAMQP has a free tier; the other does not. Paid plans start at Free for CloudAMQP and On request for GNAT Pro.
Does CloudAMQP or GNAT Pro run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use CloudAMQP for free?
Yes. CloudAMQP has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is CloudAMQP best used for?
CloudAMQP is most often used for message queue services, message brokers for distributed systems, rabbitmq and lavinmq hosting, asynchronous task processing. Of those, message queue services and message brokers for distributed systems are not what GNAT Pro is typically brought in for.

Answered from the vendors’ own pages

CloudAMQP: Does CloudAMQP offer free plans?

Yes, CloudAMQP offers free tiers: LavinMQ Loyal Lemming with 2M messages/month, and RabbitMQ Little Lemur with 1M messages/month. Both include connection and queue limits.

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
CloudAMQP: What is the cheapest paid plan?

Both LavinMQ Elegant Ermine and RabbitMQ Tough Tiger cost $19/month. LavinMQ includes 20M messages/month with 200 connections; RabbitMQ includes 10M messages/month with 100 connections.

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
CloudAMQP: How are messages charged on CloudAMQP?

CloudAMQP plans include monthly message quotas. All plans are charged on a per-second basis with monthly billing cycles.

Source
CloudAMQP: What add-ons are available?

CloudAMQP offers Virtual Private Cloud add-on at $99/month, and extra disk space at $0.35/month per GB (25-2,000 GB available).

Source
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