IdeaBoardz
2.9Free shared brainstorming boards
IdeaBoardz is a long-standing free brainstorming and retrospective board: pick 1-10 sections, name them yourself, share the URL, add ideas anonymously, upvote, and export to PDF or Excel. The app still works and is still in daily use, but development stopped years ago — the public source repository's last feature commits date to April 2020 and the Terms have not been revised since.
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Retro Rabbit
4.4Slack-first retrospectives with async note capture
Retro Rabbit is a Slack-native retrospective tool that lets teams capture notes throughout the sprint from Slack or the web app, then runs the retro on a synced board with drag-and-drop grouping, voting and assignable action items. The CarrotIQ AI layer is gated to the Pro AI plan. No public changelog and no visible feature change since April 2025 — ask for a roadmap before committing.
Full review →Summary
IdeaBoardz scores 2.9 overall and is best for throwaway retros and quick distributed brainstorms when nobody wants to sign up. It offers a free tier.
Retro Rabbit scores 4.4 overall and is best for slack-centric agile teams that want to capture retro notes continuously through the sprint and run lightweight live or async retros without leaving chat. It offers paid plans from $30/team/mo.
IdeaBoardz leads on value and open platform. Retro Rabbit leads on ease of use, retro toolkit, fun factor, AI & insights, integrations and enterprise-grade.
Across our eight scoring dimensions, Retro Rabbit edges ahead with an overall score of 4.4. That said, the right pick depends on your team — see the dimension-by-dimension breakdown below.
Scores compared
| Detail | IdeaBoardz | Retro Rabbit |
|---|---|---|
| Category | Retrospectives | Retrospectives |
| Team size | Small | Small |
| Free tier | Yes | No |
| Free limit | Fully free, no paid tier | 14-day free trial, no credit card required |
| Starting price | Free | $30/team/mo |
| Est. 3 teams × 8 people | Free (no paid tier) | $90/mo |
| Enterprise | No | Yes |
| Founded | 2010 | — |
| HQ | Pune, India | Boston, United States |
| Data residency | — | — |
| Languages | English only | English only |
| Export formats | PDF · Excel | CSV · Excel · PDF |
| Features | 9 | 16 |
| Integrations | 0 | 1 |
Feature & integration comparison
Side-by-side checklist across features, integrations and security. Hover a note for details.
| Capability | IdeaBoardz | Retro Rabbit |
|---|---|---|
| Features | ||
| AI Summaries | — | ✓note |
| AI grouping/clustering | — | ✓note |
| AI action items | — | ✓note |
| Action tracking | — | ✓ |
| Team Insights | — | — |
| Polling | — | — |
| Action dashboard | — | — |
| Custom templates | ✓note | ✓ |
| Anonymous input | ✓ | ✓ |
| Independent voting | ✓ | ✓ |
| Async mode | ✓ | ✓ |
| Agile Estimations | — | — |
| Health Checks | — | — |
| Team Kudos | — | — |
| Whiteboard | — | — |
| Integrations | ||
| Asana | — | — |
| Azure DevOps | — | — |
| Basecamp | — | — |
| ClickUp | — | — |
| Confluence | — | — |
| GitHub | — | — |
| GitLab | — | — |
| Jira | — | — |
| Linear | — | — |
| Microsoft Teams | — | — |
| Monday.com | — | — |
| Notion | — | — |
| Shortcut | — | — |
| Slack | — | ✓ |
| Trello | — | — |
| Security & Privacy | ||
| SOC 2 | — | ✓note |
| GDPR | — | — |
| SSO / SAML | — | ✓note |
| SCIM provisioning | — | — |
| ISO 27001 | — | — |
| On-premises | — | — |
| Public API | ✓note | — |
| Webhooks | — | — |
| MCP server | — | — |
IdeaBoardz — pros
- + Genuinely free — no paywall, no paid tier, no trial clock
- + No signup required to participate — just share the URL
- + 1-10 free-text sections build Start/Stop/Continue, 4Ls or Six Thinking Hats by hand
- + Drag one sticky onto another to merge them; the votes are added together
- + PDF and Excel export on every board, plus a working phone view
IdeaBoardz — cons
- − No templates at all — the only format choice is how many sections you want
- − No timer, no phases, no action items, no grouping beyond merging two stickies into one
- − Unlimited anonymous upvotes with no per-person vote budget
- − Zero integrations, no SSO, no SOC 2 and no published privacy policy — the URL is the only access control
- − No product work since April 2020; support is a Gmail address and a Twitter handle
Retro Rabbit — pros
- + Genuine Slack-first workflow — notes get captured in Slack throughout the sprint, not just at retro time
- + Reduces recency bias by collecting feedback continuously instead of in a 5-minute silent write
- + Simple, opinionated UX with drag-and-drop grouping and dot voting
- + CarrotIQ covers grouping, action-item suggestions and retro summaries on the $40/team/mo Pro AI plan
- + Flat per-team pricing with unlimited users, and CSV/XLSX/PDF export on every tier including Starter
Retro Rabbit — cons
- − Slack is the only chat/issue-tracker integration — no Jira, Teams, Confluence, GitHub, Linear or Azure DevOps
- − No health checks, team radars or longitudinal trend reporting
- − No org-level dashboards, cross-team rollups or action kanban
- − No public API, webhooks or MCP server — data leaves only as a file export
- − Enterprise controls are thin: SSO is Enterprise-tier only, no SCIM, no audit logs, and the privacy policy carries no GDPR or CCPA commitments
Keep comparing
Other IdeaBoardz comparisons
Other Retro Rabbit comparisons
Not sure which to pick? Read our guide on how to choose a retrospective tool.