IdeaBoardz
3.1Free shared brainstorming boards
IdeaBoardz is a long-standing free brainstorming and retrospective board: pick one of five presets (Retrospective, Star Fish, Six Thinking Hats, Pros and Cons, Todos) or name your own 1-10 sections, 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: the team drops notes into a Slack channel or the web app all sprint long, then runs the retro on a live synced board with drag-to-group, dot voting, a shared timer and assignable action items that carry over to the next retro. The CarrotIQ AI layer is gated to the $40/team/month Pro AI plan. Four-person vendor, Slack is the only integration, and there is still no public changelog.
Full review →Summary
IdeaBoardz scores 3.1 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 retro notes captured continuously through the sprint and a lightweight live or async board — and that don't need Jira, health checks or a procurement checklist. 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 | — | United States |
| Languages | English only | English only |
| Export formats | PDF · Excel | CSV · Excel · PDF |
| Features | 10 | 24 |
| 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 | ||
| Custom templates | ✓note | ✓ |
| Anonymous input | ✓ | ✓ |
| Health Checks | — | — |
| Action tracking | — | ✓ |
| Async mode | ✓ | ✓ |
| Whiteboard | — | — |
| Independent voting | ✓ | ✓ |
| Polling | — | — |
| Icebreaker games | — | — |
| Agile Estimations | — | — |
| Team Kudos | — | — |
| AI grouping/clustering | — | ✓note |
| AI action items | — | ✓note |
| AI Summaries | — | ✓note |
| Team Insights | — | — |
| In-meeting AI assistant | — | ✓note |
| Action dashboard | — | ✓ |
| 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
- + Five one-click presets (Retrospective, Star Fish, Six Thinking Hats, Pros and Cons, Todos), or type your own 1-10 section titles
- + 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
- − The presets only pre-fill column titles — there is no timer, no phases and no facilitator flow behind them
- − No action-item tracking, no owners, no due dates, no carry-over between boards
- − 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 capture — notes land in the channel throughout the sprint, so the board opens full instead of starting with silent writing
- + Board covers the basics properly: drag-to-group with editable group names, dot voting with a configurable 1–50 vote budget, a shared pause/resume timer, and a per-user anonymity toggle
- + Action items carry forward — a dedicated <em>Old / Unresolved Items</em> tab plus per-room and per-person trackers, with Slack reminders to assignees
- + A GIPHY picker on notes that the marketing site never mentions — the one bit of levity on an otherwise plain board
- + Flat $30/team/month with unlimited users (3 teams of 8 = $90/mo), and CSV/XLSX/PDF export on every tier including Starter
Retro Rabbit — cons
- − Slack is the only integration — no Jira, Teams, Confluence, GitHub, Linear or Azure DevOps, and no public API, webhooks or MCP
- − No health checks, team radars or sentiment tracking; the only longitudinal view is a notes-per-day bar chart per room
- − AI is two calls — a per-retro summary and one action-item suggestion. The site's <em>intelligent note grouping</em> claim has no counterpart in the shipped web app
- − Enterprise controls are thin: SSO/SAML is Enterprise-tier only, no SCIM, no audit logs, no SOC 2 of its own, the privacy policy carries no GDPR or CCPA commitments, and the Slack Marketplace listing records <em>has a dedicated security team: no</em>
- − No free tier and no public changelog, from a four-person vendor whose marketing site has not changed since early 2025
Keep comparing
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Not sure which to pick? Read our guide on how to choose a retrospective tool.