Our take
Pick Plain if product teams who will stay on Foundation at $45 / user / month billed annually (up to 5 member seats, 1,000 credits) while they open a first Threads list, then buy Horizon at $99 / user / month when they need more complex workflows. Pick Rootly if on-call teams who will buy Incident Response at $20 / user / month, then add On-Call at another $20 when they want Rootly to own the roster.
hosted incident-and-on-call desk
Best for
Plain Threads you start on a printed $ seat
Rootly Incidents you pay per user
Free plan
Plain No free plan
Rootly No free plan
Lowest paid
Plain Horizon $99/mo yearly
Rootly Incident Response $20/user/mo
Next step up
Plain
Rootly Startup discounts (“<100 employees / <$50m raised / <5 years”; “pay what you can <25 employees”) print as a form, not a dollar. $50
Coding agent
Plain Sidekick
Rootly
Runs where
Plain Hosted
Rootly Hosted
Watch out
Plain Foundation annual $45 is a member seat, not unlimited humans
Rootly $20 is per user per product
Last checked
Plain 2026-10-23 · plain.com/pricing
Rootly 2026-10-23 · rootly.com/pricing
product teams who will stay on Foundation at $45 / user / month billed annually (up to 5 member seats, 1,000 credits) while they open a first Threads list, then buy Horizon at $99 / user / month when they need more complex workflows.
Read the Plain pageon-call teams who will buy Incident Response at $20 / user / month, then add On-Call at another $20 when they want Rootly to own the roster.
Read the Rootly page