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Head-to-head · Speaker Management Software

Greenroom vs OpenSession

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Greenroom #1 in Speaker Management Software 9.4/10 Open source ✓ 4 of 6 features Visit Greenroom
OpenSession #4 in Speaker Management Software 9.1/10 Free plan Free plan✓ 5 of 6 features Visit OpenSession

Greenroom leads on 0 checks, OpenSession 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 scoreGreenroom · 9.4/10
  • Free planonly OpenSession
  • Most featuresOpenSession · 5 of 6

Greenroom scores higher on our rubric for speaker management software: 9.4 against 9.1 out of 10; our editors rank them #1 and #4.

Greenroom is the better fit for open-source teams managing speakers end to end. OpenSession is the better fit for free speaker onboarding and CFP workflows.

  • Greenroom fits best

    Open-source teams managing speakers end to end

  • OpenSession fits best

    Free speaker onboarding and CFP workflows

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Side by side

Feature Greenroom 9.4/10 Visit ↗ OpenSession 9.1/10 Visit ↗
At a glance
Editor score 9.4 9.1
Ranking #1 in Speaker Management Software #4 in Speaker Management Software
Best for Open-source teams managing speakers end to end Free speaker onboarding and CFP workflows
Pricing model Free Free
Starting price Open source Free plan
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Built for Solo, Small business, Mid-market Small business, Mid-market
Features Greenroom 4/6 · OpenSession 5/6
Application forms ✓ ✓
Speaker portal ✓ ✓
Contract management Not checked yet Not checked yet
Travel details Not checked yet ✓ (best)
Session assignments ✓ ✓
Email automation ✓ ✓
Specs
Speaker limit Not checked yet Not checked yet
Our review
Pros
  • Covers CFPs, blind review, onboarding, scheduling, and publishing
  • Reusable speaker CRM with sourcing, segments, merging, and bulk outreach
  • REST API, signed webhooks, embeds, and Airtable synchronization
  • 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.
Cons
  • Airtable is the listed third-party integration
  • Self-hosting requires the team to manage deployment responsibilities
  • Its broad event workflow may exceed the needs of simple CFP programs
  • 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.
Our verdict

Greenroom is an open-source conference program platform for organizers managing speakers from call for speakers through publication. It combines application forms, blind review, speaker status tracking, onboarding tasks, agenda building,…

Read the review →

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 →
  1. GreenroomSpeaker Management Software 9.4Open source
  2. OpenSessionSpeaker Management Software 9.1Free plan

Strengths and trade-offs

  • Greenroom — where it wins

    • Covers CFPs, blind review, onboarding, scheduling, and publishing
    • Reusable speaker CRM with sourcing, segments, merging, and bulk outreach
    • REST API, signed webhooks, embeds, and Airtable synchronization

    Where it doesn't

    • Airtable is the listed third-party integration
    • Self-hosting requires the team to manage deployment responsibilities
    • Its broad event workflow may exceed the needs of simple CFP programs

  • 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.

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