Callum is an AI calendar assistant built for teams using Google Calendar. It understands multi-person meetings, shared availability, and real-world scheduling constraints. Use natural language to schedule, reschedule, and manage meetings without back-and-forth emails or manual calendar admin. Boost Callum knowledge by connecting your CRM, ATS, CSM apps. Available on Web, iOS, Slack and ChatGPT (soon).
Hey Product Hunt 👋
I’m the maker of Callum.
Callum adds an AI layer on top of your work calendar to make scheduling simpler and more intuitive. Instead of clicking through calendar UIs or coordinating manually, you can just tell Callum what you want to do and it takes care of the rest.
It is built for work schedules and understands multi-person meetings, shared availability, and real scheduling constraints on Google Calendar.
We are launching today on web and iOS. Slack and ChatGPT integrations are coming shortly so Callum can fit naturally into your workflow.
I would love feedback from anyone who manages a busy calendar or schedules with teams. Happy to answer any questions.
Nick
Sounds interesting. Can the app connect to email and messengers to pull contacts from there?
Hello,
A good and useful tool. I would like to clarify which languages the tool will be available in?
Congrats on the Callum launch! :) Scheduling is one of those “small” pains that quietly burns hours.
Personally, I’d use it for team scheduling in Google Calendar when a simple meeting turns into a 12-message thread, especially for reschedules and multi-person availability.
When you say “real-world scheduling constraints”, what does that cover, like working hours, buffers/travel time, and rules like “no meetings after X”?
I generally prefer my digital assistants to be as Spartan as possible; unnecessary complexity in either design or function tends to result in a tiresome learning curve. Callum, however, manages to be considerably more ambitious than my typical expectations while remaining surprisingly approachable for the uninitiated — I shall be watching for further updates!
PS I particularly appreciate the 'Made for busy people' sentiment :)
Callum sounds like a huge relief for team scheduling! I’m really curious if it can accurately handle complex time zone differences and personal buffer times for everyone involved. Since it connects to CRM and ATS apps, I wonder how it protects sensitive client data while analyzing our availability. Is the natural language processing smart enough to understand vague requests like "sometime late next week," and can we easily override its suggestions if plans change? Also, will the upcoming ChatGPT integration allow us to manage the whole team’s calendar directly through a simple chat?
Calendars are already crowded tools. The real value here feels like reducing coordination friction between people, not just scheduling itself.
Congrats on the launch! Callum looks like a strong AI layer for real-world, multi-person scheduling across teams.
When a team is already using tools like booking links, Google’s native scheduling, or calendar-optimization apps, what’s the clearest “switching trigger” where Callum is meaningfully better—and what does Callum intentionally not try to do?
@nick_ustinov1 Congrats on the launch! One thing I’m curious about: handling corner cases like last-minute conflicts, buffer times and priority trade-offs can be tricky for AI schedulers. Do you have plans or ideas around how Callum will tackle those as the product evolves?
Happy to see the product here with updated features that users always wanted. Kudos to the whole team on launch
Going to try this for my challenge — scheduling across time zones and multiple teams, 15 emails deep, trying to find 30 minutes that works for everyone.
If it handles multi-person availability well, that alone is worth it. Congrats on the launch, Nick.
Turning scheduling into a conversation instead of a UI maze is a smart move.
Looking forward to the Slack and ChatGPT integrations.
First calendar AI assistant which works properly 🎉🎉🎉 I'll soon stop typing and scrolling and only use voice, such a relief. My favorites are different summaries, searching, adding calls quickly, reminders, and color-coding. I still need to test accessing data via integrations.
