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Clerk vs Plain

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

Option A
Clerk

Clerk

SaaS

Authentication and user management for modern apps.

Clerk gives you prebuilt sign-in, sign-up, and user management UI with multi-factor auth, social, and enterprise SSO out of the box.

Founder
Colin Sidoti
Founded
2019
Team
51-200
Listing
Free (nofollow)
Listed
May 2026
View Clerk →
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

Clerk alternatives →Plain alternatives →