03 / 04 — Scheduling
Cal
Your availability as a link. People pick a slot, everyone gets a calendar invite, and nobody pays $12 a month for the privilege. In the works.
Zerosoft
30 min meeting
A quick intro call. Pick a time that works for you.
● 30 min01 — Features
One link. Done.
Zero emails back and forth.
Booking pages
One link per meeting type: 15, 30 or 60 minutes. Share it and never email times again.
Timezone detection
Guests see slots in their timezone, you see them in yours. Nobody does math.
Buffers & limits
Padding before and after, max meetings per day, minimum notice. Your calendar, defended.
Round-robin
Distribute bookings across the team automatically. Fair by default.
Calendar sync
Google Calendar in and out. Busy blocks respected, invites written automatically.
Confirmations & reminders
Automatic emails for booking, reminder and cancellation. No-shows drop.
Custom questions
Ask what you need before the call: agenda, phone number, anything.
Embed anywhere
Drop your booking page into any site with one snippet.
API & webhooks
Create event types and read bookings from your own tools.
02 — The math
Today you pay
With Zerosoft
$0Calendly Standard costs about $12 per user per month. Ten people scheduling: $1,440 a year, every year. Cal costs $0.
03 — Two ways to have it
A
Self-host it
Download the code, run it on your server, change whatever you want. It is yours under an open license — today, tomorrow, and if we ever disappear.
$0 / forever
B
We run it for you
Login, backups, updates and uptime included. You pay exactly what the cloud costs us. Not a cent more, ever.
At cost / of the cloud
04 — FAQ
Fair questions.
Zero fine print.
Is it really free?
Yes. Open source, so self-hosting costs nothing. If we host it, you pay only the cloud at cost. Scheduling is bits and a calendar API — it was never worth $12 a month.
Can I migrate from Calendly?
Recreating your event types takes minutes — durations, buffers and questions all map over. Your old booking links can redirect to your new ones, so nothing breaks.
What happens if Zerosoft shuts down?
You would not notice. Self-host the same code on your server, export your bookings, and your links keep working on your domain.
Can I self-host it?
Yes. Clone, run, connect your calendar, share your link. No license server, no feature flags, no premium tier hiding the good parts.
When does it ship?
Cal ships in Q2 2027. Write to hola@zerosoft.ai and we will let you know the moment it opens.
Cal — 0.05
Book time.
Bill nobody.
Cal arrives in Q2 2027. Raise your hand and we will ping you on day zero.
Notify me →