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Cal.com vs Plain

Side-by-side comparison of two indie startups from the Startup Spotlight directory.

Option A
Cal.com

Cal.com

SaaS

The open-source scheduling infrastructure.

Cal.com is an open-source Calendly alternative for scheduling and infrastructure for everything calendar-related. Self-hostable.

Founder
Peer Richelsen
Founded
2021
Team
51-200
Listing
Free (nofollow)
Listed
May 2026
View Cal.com →
Option B
Plain

Plain

SaaS

A modern customer support platform.

Plain is a customer-support tool built for engineers — multi-channel inbox, deep API, and a Linear-grade UX.

Founded
2020
Team
11-50
Listing
Free (nofollow)
Listed
May 2026
View Plain →

See more alternatives

Cal.com alternatives →Plain alternatives →