Our take
Pick Featurebase if support / product teams who will stay on Free forever (1 seat, AI not supported) while they open a first Inbox thread, then buy Growth at $29 / seat / month billed yearly (or Professional $59 / Enterprise $99). 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
Best for
Featurebase Customer threads you start at $0
Plain Threads you start on a printed $ seat
Free plan
Featurebase $0 · forever, 1 seat. Live chat, unified inbox, ticketing, mobile app on the Free copy. AI not supported
Plain No free plan
Lowest paid
Featurebase Growth $29/mo yearly
Plain Horizon $99/mo yearly
Next step up
Featurebase Professional $59/mo yearly
Plain
Coding agent
Featurebase
Plain Sidekick
Runs where
Featurebase Hosted
Plain Hosted
Watch out
Featurebase Free is 1 seat and no AI
Plain Foundation annual $45 is a member seat, not unlimited humans
Last checked
Featurebase 2026-10-23 · featurebase.app/pricing
Plain 2026-10-23 · plain.com/pricing
support / product teams who will stay on Free forever (1 seat, AI not supported) while they open a first Inbox thread, then buy Growth at $29 / seat / month billed yearly (or Professional $59 / Enterprise $99).
Read the Featurebase pageproduct 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 page
