Is Buffer or Cal.com free?

Both can be used for free. Buffer: Free plan, paid upgrades. Cal.com: Free plan, paid from $15 a month.

Do I need to install Buffer or Cal.com?

No. Both run in a web browser, so you can open either one and start.

Price, ratings and what each one does, side by side. Every fact here comes from their listings on Linkstore.

Schedule posts across your social accounts.

Open scheduling that you can host yourself.

Buffer

Cal.com

Buffer queues posts for several networks and shows how each one performed.

Share a booking link, connect your calendars and let people pick a time. Open source and extensible.

Apps that do a similar job, closest matches first.

Google Calendar
A calendar for your day, shared with other people.
ProductivityNewFree
Open
Calendly
Let people book time with you without the back and forth.
ProductivityNewFreemium
Open
Notion Calendar
A fast calendar that sits on top of Google Calendar.
ProductivityNewFree
Open
ihatepdf.cv
60+ free PDF tools. Merge, split, compress, edit, convert, sign, encrypt. No watermark. No upload. No sign-up. Files never leave your device.
Productivity5.0Free
Open
TickTick
A to-do list with a calendar and a pomodoro timer.
ProductivityNewFreemium
Open
tasks
Capture daily tasks, track your progress, and sync between devices with WebRTC
Productivity5.0Free
Open