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Browse the Fuel ShopFuel OS vs Calendly · Everything it replaces
Calendly books the time. This books it, then runs the work around it
Booking pages, calendar events and the room for the meeting are in one place, with Fuela filing the follow-up.
Credit where it is due. Calendly is the simplest way to let someone pick a time, with solid calendar and routing integrations.
Group chats
Group chats that get things done
Calendly stops at the booking. Here, the group is where the work happens.
AI in the room, acting
Fuela sits in the group. She catches you up on what you missed, files the task someone just promised, drafts the reply and answers from the room's own history.
One group, every language
Every message translates as it arrives, so a group spans countries. Write in Spanish, read in English, reply in Arabic.
Our own team works across the US, Colombia, Pakistan and the Philippines in one room.
Threads and posts
Side conversations go in threads, announcements go in posts, and the main room stays readable.
Builders-only notes in client groups
In a group with a client, the team can whisper a note only builders see, right beside the message it is about.
Calls and replays inside the group
Start a call from the room. It records on request and comes back as a replay with a transcript and a summary, in the same room.
Rich cards, not links
A deck, a call, a task or a doc lands as a card you can open, RSVP to or update without leaving the chat.
Presence and waves
See who is online right now and wave hello in one tap: a wave, an emoji, a warm line in their language or a GIF.
Room permissions that travel
Decide whether new members inherit what was shared before they joined, or only see what comes after. Every doc has its own access level, from private to public.
One room, every language, the work done
Someone writes in Spanish, everyone reads it in their own language, and Fuela turns the promise into a task with an owner and a date. The call that followed is a replay in the same room.
Shown with sample people and messages.
Launch team
5 people · Fuela · 3 languages
Mara
The new photos are in. Can someone confirm the launch date?
Diego
The brand said the 28th. I will send the final copy by Friday.
Translated from Spanish
Filed it. Diego owns the final copy, due Friday, launch set for the 28th.
Perfect, thanks everyone.
Line by line
Including the rows where Calendly wins. A comparison with no losses in it is an advert.
| Feature | Fuel OS | Calendly |
|---|---|---|
| AI | Fuela in every room: answers, files tasks, drafts, books, remembers | Not built in |
| After the booking | A room, a task list and a replay for the meeting | Confirmation emails and reminders |
| Languages | Every message translated as it arrives, both ways | Booking pages in several languages |
| Scheduling polish | Booking pages and calendar events | Years of refinement in routing and round-robin |
Based on Calendly’s public features as of October 2026. Features change; tell us if something here is out of date.
Built for the AI era
Calendly was built before AI, this was built for it
“We need a new command and control center for AI, and this is it.” People and bots work in the same rooms, and the AI does the work instead of sitting in a sidebar.
People and bots, from day one
Other chat apps were built before AI and bolt it on. This one was built for humans and bots working in the same rooms.
AI that acts, files and remembers
Fuela does the work: tasks with owners and dates, replies, pages, bookings. She remembers what the team decided, so nobody repeats themselves.
Bots with bots
Bots can work with other bots, in their own rooms, under a human's eye.
LET GO BOTS is a room of bots that hand work to each other.
A command center for AI
Run the team, the bots and the work from one place: ask, assign, watch it happen, step in when it matters.
Who it is for
Community first, and private first when you need it. We have used it every one of these ways ourselves.
Solopreneurs
One person with a team of bots: Fuela files, drafts, books and follows up.
Our founder starts every day by asking Fuela what needs him.
Teams
Rooms per project, tasks from messages, calls with replays.
Insert Fuel's builders run every client from it.
Non-profits
Volunteers across languages in one room, with the work tracked.
Our foundation work runs in its own room.
Families
A private room for the family, safe for the kids.
Our founder's own family talks in a private room.
Organizations
Brands, clients and staff, each seeing only what they should.
Client rooms with builders-only notes.
Three ways to work
Humans with humans
A better group chat: translated, threaded, with calls and replays inside.
Bots with builders
People direct, bots do. Fuela in every room, taking the busywork.
Bots with bots
Bots hand work to each other in LET GO BOTS, and report back to a person.
“This does not exist.”
“A new command and control center for AI.”
“No language barriers.”
“Community first, but also private first.”
“Not just for us. For humanity.”
Basim Mousilli, founder, in his own words.
Try it now
Talk to Fuela
Ask her anything, or hand her a job and see what she would do with it. This demo has no access to any real data and saves nothing. Inside Fuel OS she works on your rooms, tasks, calls and docs.
Talk to Fuela
A live demo with no access to any real data. Nothing you type is saved.
Fuela here. Ask me anything about how this works, or give me a job and see what I would do with it.
Moving from Calendly
Point your booking link at a Fuel OS booking page and keep the old one open until the last booking passes.
This page links to a presentation made with Fuel Slides.