Callboard vs Fourwaves

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.

Fourwaves is a conference management service for academic and scientific events, covering abstract submissions, peer review, registration, event websites, programs and attendee apps. Submission forms can support calls for papers and abstracts, and organizers can export abstract books with author indexes. Review workflows offer single- or double-blind processes, reviewer conflict detection and custom scoring grids. Its iOS and Android app includes the event program, personal agenda, participant list and presentation materials, and works offline. An API with organization-specific keys provides endpoints for event, registration, form, submission and session data. The free Starter plan costs nothing and caps yearly submissions at 25. Essential costs $999 a year with a 100-submission limit; Advanced costs $2,599 a year with a 300-submission limit. Each lists a 3% service fee. When a yearly cap is reached, new submissions pause until an upgrade, though existing submissions, registrations and event websites remain accessible. The company describes its audience as research communities, universities, scientific societies and research networks.