Scheduling and meetings decision
Clockwise
A scoped replacement that offers Focus Time holds and simple scheduling links is realistic to build and self-host, but reproducing Clockwise's refined AI scheduling, enterprise features, and tuned heuristics requires more time and data than a small team likely has.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All Clockwise alternatives, with the arithmetic →
What a replacement has to do
- Sync users' calendars, compute/choose optimal free time windows, insert/update Focus Time/hold events, expose simple scheduling links that create events, store user preferences
What it still won’t have
- Clockwise's proprietary AI and years of scheduling heuristics
- Enterprise features and vetted security/compliance (SSO, SOC 2) provided by vendor
- Seamless multi-calendar quality and heuristic tuning done by Clockwise
- Migration conveniences and dedicated support promised during shutdown
What remains hard
- Brand trust
the Clockwise team is joining Salesforce.
- Brand trust
serving some of the most impressive customers like Uber, Netflix, and Atlassian.
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 2 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal self-hosted Clockwise-like service using Node.js (Express), Postgres, React, and FullCalendar that: 1) implements OAuth2 login and calendar access for Google and Microsoft Graph; 2) reads free/busy and computes available slots respecting user-configured availability and meeting buffer rules; 3) creates/updates/deletes calendar events for Focus Time holds and booking via scheduling links; 4) exposes a simple public scheduling link endpoint that books a selected slot and sends a confirmation email (SMTP or SendGrid); 5) stores user preferences in Postgres and shows them in a React dashboard using FullCalendar. Out of scope: large-scale ML model training, advanced AI heuristics, enterprise SSO/SCIM, multi-tenant billing. Include error handling for API failures and token refresh, unit tests for slot-finding logic, and end-to-end tests for booking flows.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 4 cited sources+3
- 3/3 assessment runs agreed+4
- Evidence score64
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 4
Every page the run actually retrieved.
- official productClockwise — official product
- official pricingClockwise — pricing & FAQ
- official docsClockwise — features/docs (wind-down)
- open sourcelukevella/rallly
Integrity checks
What held up, and what did not.
