Callboard vs Sessionize

Callboard is an open-source system for managing event proposals and the work from submission through schedule publication. Organizers can build CFP forms with conditional questions, shared character limits, participant rules and close dates, then route proposals to tracks. Reviewers see their assigned submissions, while organizers can apply weighted scores in two rounds. Accepted speakers use a portal to update session details, upload headshots and materials, finish tasks and read event resources.

For planning, organizers place sessions in rooms and time slots and use a conflict view to spot overlaps. Published schedules can be embedded and provide ordered speaker and co-speaker names, calendar invites, CSV exports and API access. Documented integrations include Accelevents CSV export, optional API push, an Airtable mirror and signed webhooks, with optional Svix delivery. AI abstract triage offers an advisory score and recommendation; it cannot write committee reviews or change submission status. The main application is described as one Cloudflare Worker using D1 and R2. Callboard is self-hosted under the MIT license, at free.

Sessionize is cloud-based event content management software for organizing in-person or online events. Its workflow covers calls for speakers, proposal evaluation, speaker and session management, and schedule building. Organizers can create submission forms with custom fields, submission limits, deadlines, and agent mode. Evaluation options include star ratings, Yes/No decisions, and comparisons. Schedules can be arranged by drag and drop, embedded on websites, or retrieved as JSON or XML. The included attendee app works on phones, tablets, and desktops, supports offline use, and lets attendees build personal schedules. API integration and embedding support event websites, mobile apps, and WordPress sites. Sessionize lists unlimited sessions, speakers, team members, organizers, and evaluators. Its free trial requires no credit card. Community events can use the free plan, while a Professional event costs $499, paid once for one event occurrence. Sessionize does not provide attendee management or ticket selling, live streaming or video hosting, or an event webpage builder. It is available on Android, iOS, and web.