When2meet
Replaceable in one session with an AI coding agent.
A grid where everyone paints the times they are free, and the overlap shows the best slot — no accounts, no email, nothing but a link.
Build the availability grid. STACK - One HTML page, SQLite, no accounts and no framework THE GRID - Days across, half-hour slots down, drag to paint availability - Painting must work with a mouse, with touch, and with the keyboard; a drag-only grid excludes people STORING - One row per person per slot, or a bitmask per person per day — the bitmask is smaller and simpler - The person is a name they type; no account, ever THE OVERLAP - Colour intensity by how many people are free, and a hover showing who - That single view is the entire product TIME ZONES - Store slots as UTC instants, render in the viewer's zone, and name the zone on screen Include the bitmask storage, the paint interaction and the overlap rendering.
What you lose
- A tool so simple that people actually use it, which is harder to design than to build
- Twenty years of a URL people remember
- Zero maintenance on your side
If you would rather not build
- A shared calendar with free-busy, which is free
- A group chat, which is how most of these end anyway
The escape hatch
open source · no votes, no paid placement
Why this verdict
our own opinion · changed only by a person
92/100
Verdict yes at 92, and it is free — build it only to own the design. The keyboard alternative to dragging is the part worth doing properly.
History
tracked since 10 Aug 2026 · nothing is ever overwritten
Nothing recorded yet. This chart fills in once the page has visitors, votes or prompt copies — it will not draw a flat line to look busy.
Questions about When2meet
answered from the record above
Is When2meet free?
No — the plan we track is $0 a month. Free with no accounts and no paid tier; it is on this list as a benchmark rather than for its price.
Can you replace When2meet by building your own?
YES. Replaceable in one session with an AI coding agent. Replacement score 92 out of 100, build time one session. Read what you lose before you decide.
How much does When2meet cost?
$0 a month on Free — $0 a year. Recorded 10 Aug 2026.
What do you lose by replacing When2meet?
A tool so simple that people actually use it, which is harder to design than to build; Twenty years of a URL people remember; Zero maintenance on your side. If any of those carry weight for you, keep paying.
Is there an open-source alternative to When2meet?
Yes: Rallly, Framadate. The prompt on this page is for when you want it your way instead.
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