Whenn

Whenn automates external group meeting scheduling. Add participants, connect calendars — AutoWhenn reads everyone's availability, finds the best slot, confirms the meeting, and sends calendar invites. Zero host involvement after setup.

The problem Whenn solves

Internal meetings are easy — you open your calendar, see when everyone's free, pick a slot. External group meetings are a different problem. You have no visibility into anyone else's calendar. So you send emails, wait for replies, go back and forth, and eventually find a time that works for most people. Whenn eliminates every step of that process.

How AutoWhenn works

• Reads availability — connects to participants' Google and Microsoft calendars cross-organisation, in real time
• Finds the best slot — identifies the optimal overlapping time across all timezones and constraints
• Confirms the meeting — automatically, with no host action required
• Sends calendar invites — to every participant, with video conferencing links included

No participant accounts required

Participants connect their calendar with one click — no account creation, no software to install. Works across Google and Microsoft calendars, cross-organisation. Participants who cannot connect their calendar can submit availability via a manual grid instead.

Built for external group meetings

Whenn is purpose-built for meetings that are hardest to schedule: client kickoffs, panel interviews, multi-stakeholder sessions, speaker briefings, and any group meeting where participants are from different organisations.

Microsoft Calendar integration

Whenn reads live free/busy data from Microsoft 365 calendars via Microsoft Graph, and creates confirmed calendar events with Microsoft Teams links for host accounts. Participants connect using Calendars.Read scope only — read-only, minimum necessary access.

Pricing

Free tier: 3 AutoWhenn confirmations per month, unlimited manual confirmation. Pro: unlimited AutoWhenn confirmations from £8/month.