osTicket vs Plain
Side-by-side trajectory, velocity, and editorial themes.
osTicket runs in steady maintenance mode — security patches and PHP compatibility, little net-new
osTicket's release feed is pure maintenance. The recent stable line (v1.18.x) ships security updates, bug fixes, and ongoing PHP 8.3/8.4 compatibility, with refreshed language packs and plugins each time. Release cadence is slow and irregular — the latest, v1.18.4, followed v1.18.3 by roughly five months. This is a mature open-source helpdesk being kept current, not actively reinvented.
The throughline is keeping a long-lived codebase safe and runnable on current PHP, plus the multi-year push to get installs onto OAuth2/Modern Authentication as Microsoft and Google retire Basic Auth for email. Expect continued patch-and-compatibility releases rather than feature expansion; the project's value is stability and self-hostability, and the changelog reflects that posture.
The next release will most likely be another v1.18.x maintenance drop with security fixes and PHP/library compatibility, timed to a disclosed vulnerability or a new PHP version. A feature-led release isn't indicated by this history.
Plain turns Sidekick from a drafting assistant into an agent that acts
Plain is a customer-support platform building an agentic layer — 'Sidekick' — into the core thread workflow. Recent releases moved Sidekick from suggesting to acting: it can take actions across connected tools, start working proactively the moment a thread matches a workflow, and it now answers in Slack. The surrounding plumbing (scheduled workflows, thread fields via the chat widget, machine-user API links to Linear) is all in service of more automation.
The arc points to autonomous, workflow-driven support: AI that investigates, summarizes, drafts, and executes before a human opens the thread. Each release widens either Sidekick's reach (Slack, connected tools) or the triggers that set it off (workflow conditions, schedules), steadily shifting the human role from doing the work to reviewing it.
Expect deeper Sidekick autonomy — more action types and likely approval or guardrail controls — plus more workflow triggers that launch automation without a human in the loop.
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