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Head-to-head · Speaker Management Software

OpenSession vs Callboard

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score OpenSession #4 in Speaker Management Software 9.1/10 Free plan Free plan✓ 5 of 6 features Visit OpenSession
Callboard #8 in Speaker Management Software 8.7/10 Open source ✓ 0 of 6 features Visit Callboard

OpenSession leads on 0 checks, Callboard on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreOpenSession · 9.1/10
  • Free planonly OpenSession
  • Most featuresOpenSession · 5 of 6

OpenSession scores higher on our rubric for speaker management software: 9.1 against 8.7 out of 10; our editors rank them #4 and #8.

OpenSession is the better fit for free speaker onboarding and CFP workflows. Callboard is the better fit for open-source CFP and conference-program teams.

  • OpenSession fits best

    Free speaker onboarding and CFP workflows

  • Callboard fits best

    Open-source CFP and conference-program teams

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Side by side

Feature OpenSession 9.1/10 Visit ↗ Callboard 8.7/10 Visit ↗
At a glance
Editor score 9.1 8.7
Ranking #4 in Speaker Management Software #8 in Speaker Management Software
Best for Free speaker onboarding and CFP workflows Open-source CFP and conference-program teams
Pricing model Free Free
Starting price Free plan Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Built for Small business, Mid-market Small business, Mid-market
Features OpenSession 5/6 · Callboard 0/6
Application forms ✓ (best) Not checked yet
Speaker portal ✓ (best) Not checked yet
Contract management Not checked yet Not checked yet
Travel details ✓ (best) Not checked yet
Session assignments ✓ (best) Not checked yet
Email automation ✓ (best) Not checked yet
Specs
Speaker limit Not checked yet Not checked yet
Our review
Pros
  • Custom CFP forms support conditional logic and file uploads.
  • Conflict-aware scheduling helps avoid room and speaker clashes.
  • Speaker portals, tasks, reminders, and calendar invites support onboarding.
  • Conditional CFP forms with track routing and participant rules
  • Weighted multi-round review with assigned reviewer workspaces
  • Agenda, conflict detection, public schedules, API, and integrations
Cons
  • Self-hosting requires a Cloudflare Worker with D1 and R2.
  • Cloudflare usage may add infrastructure charges.
  • Third-party ecosystem connections are centered on API, JSON, and ICS feeds.
  • Integrations center on Accelevents and Airtable
  • API access is scoped to sessions, speakers, and metadata
  • Self-hosting adds deployment responsibility for the operating team
Our verdict

OpenSession is an open-source platform for conference organizers managing calls for papers, submissions, reviews, scheduling, and speaker administration. It supports public CFPs with custom MDX forms, conditional logic, and file uploads,…

Read the review →

Callboard is open-source software for event organizers running calls for proposals, proposal review, speaker onboarding, agenda planning, and public programme publishing. It fits conference and event teams that need one workflow spanning…

Read the review →
  1. OpenSessionSpeaker Management Software 9.1Free plan
  2. CallboardSpeaker Management Software 8.7Open source

Strengths and trade-offs

  • OpenSession — where it wins

    • Custom CFP forms support conditional logic and file uploads.
    • Conflict-aware scheduling helps avoid room and speaker clashes.
    • Speaker portals, tasks, reminders, and calendar invites support onboarding.

    Where it doesn't

    • Self-hosting requires a Cloudflare Worker with D1 and R2.
    • Cloudflare usage may add infrastructure charges.
    • Third-party ecosystem connections are centered on API, JSON, and ICS feeds.

  • Callboard — where it wins

    • Conditional CFP forms with track routing and participant rules
    • Weighted multi-round review with assigned reviewer workspaces
    • Agenda, conflict detection, public schedules, API, and integrations

    Where it doesn't

    • Integrations center on Accelevents and Airtable
    • API access is scoped to sessions, speakers, and metadata
    • Self-hosting adds deployment responsibility for the operating team

More comparisons

All speaker management software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update