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Developer Tools · head to head

GNAT Pro vs Paymo

GNAT Pro logo

GNAT Pro

Developer Tools

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

From
On request
Free plan
No
Visit GNAT ProFull review
Paymo logo

Paymo

Project Management

Work & project management for teams

From
Free
Free plan
Yes
Visit PaymoFull review

The short version

  • Paymo is a work management solution.
  • Paymo starts at $5.9/mo; GNAT Pro prices on request.
  • Where GNAT Pro falls short: no pricing published on website; requires contacting AdaCore directly for quotes.
  • Where Paymo falls short: every advertised price rises after 3 months, with Plus going from $10.90 to $15.90 per user and Pro from $16.90 to $23.90.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

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

Attributes where GNAT Pro and Paymo differ
AttributeGNAT ProPaymo
Starting priceOn requestFree
Pricing modelQuoteFreemium
Free tierNoYes
PlatformsWebWeb, iOS, Android, Windows, macOS
CategoryDeveloper ToolsProject Management

Not yet recorded: founded for GNAT Pro.

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 Paymo does not also cover.

Only in Paymo

  • Task management
  • Time tracking
  • Invoicing
  • Gantt charts
  • Resource scheduling
  • Slack
  • Google Workspace
  • Zapier

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

Paymo

  • Time tracking for freelancersnot GNAT Pro
  • Project management for small teamsnot GNAT Pro
  • Invoice generation and client managementnot 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

Paymo

  • Every advertised price rises after 3 months, with Plus going from $10.90 to $15.90 per user and Pro from $16.90 to $23.90
  • The free plan allows 1 user, 1 client and 2 projects
  • The Solo plan is still capped at 3 clients and 5 projects
  • Gantt charts, task dependencies and scheduling require the Plus plan
  • Integrations are excluded from both the free and Solo plans

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Paymo

Free
  • FreeFree
    • 1 user
    • unlimited time tracking
    • unlimited invoices
  • Solo$5.9/mo
    • 1 user
    • flat rate/retainer projects
    • 3 clients
  • Plus$10.9/mo
    • unlimited users
    • spreadsheet view
    • recurring tasks
  • Pro$16.9/mo
    • unlimited users
    • Gantt charts
    • task dependencies

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose Paymo if

  • You need task management.
  • You want to start without paying.
  • You work on Web, iOS, Android, Windows, macOS.
  • You also want time tracking.
Paymo review

Questions people ask

Is GNAT Pro or Paymo better?
Neither clearly leads. GNAT Pro starts at On request and Paymo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Paymo?
Paymo has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for Paymo.
Does GNAT Pro or Paymo run on more platforms?
GNAT Pro runs on Web. Paymo runs on Web, iOS, Android, Windows, macOS.
Can I use Paymo for free?
Yes. Paymo 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 Paymo is typically brought in for.
What can GNAT Pro do that Paymo cannot?
Paymo covers Task management, Time tracking, Invoicing, Gantt charts.

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
Paymo: What is the storage limit by plan?

Free: 1GB, Solo: 5GB, Plus: 50GB, Pro: 500GB.

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
Paymo: Can I use Paymo with multiple users on the Free plan?

No, Free and Solo plans are limited to 1 user only. You need Plus or Pro for multiple users.

Source
Paymo: What happens after the promotional pricing period ends?

Regular prices apply: Solo $9.90/month, Plus $15.90/user/month, Pro $23.90/user/month.

Source
Paymo: Is there a discount for annual billing?

Yes, annual payment offers up to 40% discount compared to monthly billing.

Source
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