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Project Management · head to head

Clockwise vs GNAT Pro

C

Clockwise

Project Management

Intelligent calendar management for teams

From
Free
Free plan
Yes
Visit ClockwiseFull review
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

The short version

  • Clockwise is an AI-powered calendar assistant.
  • Clockwise starts at $6.75/mo; GNAT Pro prices on request.
  • Where Clockwise falls short: service discontinued and shut down on March 27, 2026.
  • Where GNAT Pro falls short: no pricing published on website; requires contacting AdaCore directly for quotes.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

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

Attributes where Clockwise and GNAT Pro differ
AttributeClockwiseGNAT Pro
Starting priceFreeOn request
Pricing modelFreemiumQuote
Free tierYesNo
CategoryProject ManagementDeveloper Tools

Identical on both: platforms (Web).

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 Clockwise

  • Focus Time protection
  • Meeting optimization
  • Scheduling links
  • Team analytics
  • Conflict resolution
  • Google Calendar
  • Slack
  • Zoom

Only in GNAT Pro

Nothing recorded that Clockwise does not also cover.

What people use each for

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

Clockwise

  • Schedulingnot GNAT Pro
  • Appointment bookingnot GNAT Pro
  • Time trackingnot GNAT Pro
  • Resource managementnot GNAT Pro
  • Team coordinationnot GNAT Pro

GNAT Pro

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

Where each one falls short

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

Clockwise

  • Service discontinued and shut down on March 27, 2026
  • All user data was deleted upon shutdown
  • Integration with Asana was removed during product lifecycle

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

Clockwise

Free
  • FreeFree
    • Focus Time
    • Meeting optimization
    • Personal analytics
  • Teams$6.75/mo
    • Team analytics
    • Flexible meetings
    • Admin controls

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Which should you pick?

Choose Clockwise if

  • You need focus time protection.
  • You want to start without paying.
  • You also want meeting optimization.
Clockwise review

Choose GNAT Pro if

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

GNAT Pro review

Questions people ask

Is Clockwise or GNAT Pro better?
Neither clearly leads. Clockwise 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, Clockwise or GNAT Pro?
Clockwise has a free tier; the other does not. Paid plans start at Free for Clockwise and On request for GNAT Pro.
Does Clockwise or GNAT Pro run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Clockwise for free?
Yes. Clockwise has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is Clockwise best used for?
Clockwise is most often used for scheduling, appointment booking, time tracking, resource management. Of those, scheduling and appointment booking are not what GNAT Pro is typically brought in for.
What can Clockwise do that GNAT Pro cannot?
Clockwise covers Focus Time protection, Meeting optimization, Scheduling links, Team analytics.

Answered from the vendors’ own pages

Clockwise: What happened to Clockwise?

Clockwise was acquired by Salesforce and shut down on March 27, 2026. The company announced the team was joining Salesforce to work on Agentforce. User data was deleted and prorated refunds were issued to paying customers.

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
Clockwise: What integrations did Clockwise support?

Clockwise integrated with Google Calendar, Microsoft Outlook, Slack, and previously Asana (though this integration was discontinued).

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
Clockwise: What were Clockwise's key features?

Clockwise offered AI-powered focus time protection, automatic meeting buffers, Slack status sync, smart lunch breaks, and team calendar synchronization to optimize schedules and prevent burnout.

Source
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