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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NimbleRetro
3.8Time-boxed retros with 5-Why root cause analysis
NimbleRetro is the retrospective module inside NimbleWork's broader Nimble agile platform. It runs a time-boxed retro through Icebreaker, Ideate, Group, Vote, Discuss and Feedback stages, ending in a 5-Why root cause drill-down on whatever the team voted up. Action items created in the Discuss stage convert directly into Nimble work items (user stories, cards) in the project the retro was created from. There is no separate purchase — Retrospectives ship to every Public SaaS Nimble account by default.
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.
NimbleRetro scores 3.8 overall and is best for small agile teams already inside the Nimble suite that want a structured, time-boxed retro ending in a real root cause analysis, with the follow-up landing in the same backlog they already work from. It offers paid plans from $15/mo (up to 20 users).
IdeaBoardz leads on ease of use and value. NimbleRetro leads on retro toolkit, fun factor, integrations, open platform and enterprise-grade.
Across our eight scoring dimensions, NimbleRetro edges ahead with an overall score of 3.8. That said, the right pick depends on your team — see the dimension-by-dimension breakdown below.
Scores compared
| Detail | IdeaBoardz | NimbleRetro |
|---|---|---|
| Category | Retrospectives | Retrospectives |
| Team size | Small | Small |
| Free tier | Yes | No |
| Free limit | Fully free, no paid tier | Free trial only; no permanent free tier published for the retro module. A $0 Nimble suite plan (10 users / 10 projects) appears in a secondary table on the suite pricing page, but Retrospectives appear neither there nor in the suite's full feature-comparison table |
| Starting price | Free | $15/mo (up to 20 users) |
| Est. 3 teams × 8 people | Free (no paid tier) | $240/mo (24 users x $10/user/mo Nimble Team tier); NimbleRetro's own $15/mo plan caps at 20 users and no larger standalone tier is published |
| Enterprise | No | Yes |
| Founded | 2010 | 2002 |
| HQ | Pune, India | Cupertino, CA, United States |
| Data residency | — | United States · European Union |
| Languages | English only | English only |
| Export formats | PDF · Excel | — |
| Features | 10 | 19 |
| Integrations | 0 | 4 |
Feature & integration comparison
Side-by-side checklist across features, integrations and security. Hover a note for details.
| Capability | IdeaBoardz | NimbleRetro |
|---|---|---|
| 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 | — | — |
| AI action items | — | — |
| AI Summaries | — | — |
| Team Insights | — | — |
| In-meeting AI assistant | — | — |
| Action dashboard | — | ✓note |
| Integrations | ||
| Asana | — | — |
| Azure DevOps | — | — |
| Basecamp | — | — |
| ClickUp | — | — |
| Confluence | — | — |
| GitHub | — | ✓note |
| GitLab | — | ✓note |
| Jira | — | — |
| Linear | — | — |
| Microsoft Teams | — | ✓note |
| Monday.com | — | — |
| Notion | — | — |
| Shortcut | — | — |
| Slack | — | ✓note |
| Trello | — | — |
| Security & Privacy | ||
| SOC 2 | — | ✓note |
| GDPR | — | ✓ |
| SSO / SAML | — | ✓note |
| SCIM provisioning | — | — |
| ISO 27001 | — | ✓note |
| On-premises | — | — |
| Public API | ✓note | ✓note |
| Webhooks | — | ✓note |
| MCP server | — | ✓note |
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
NimbleRetro — pros
- + 5-Why root cause analysis is a <em>built-in retro stage</em>, not an afterthought — almost no other retro tool ships one
- + Anonymous voting plus a facilitator-set timer on every stage keeps a 60-minute retro on the rails
- + Action items convert directly into Nimble work items, so follow-up lands in the same backlog the team already works from
- + Included by default in every Public SaaS Nimble account — no separate purchase, no tier upgrade, available to all user roles
- + NimbleWork runs annual SOC 2 Type II and ISO/IEC 27001:2022 audits, supports SAMLv2/ADFSv3 SSO, and publishes a separate EU data region
NimbleRetro — cons
- − The dedicated NimbleRetro iOS and Android apps have been delisted from both the App Store and Google Play, while the product pages still advertise them
- − No health checks, no recurring retros, no async mode, and no documented export of a retro board in any format
- − The platform surface — REST API, outgoing webhooks and the new Nimble MCP server — reaches Nimble cards only; none of it touches a retro, and no AI runs on retro data despite the Retrium comparison page ticking <em>Generative AI</em>
- − Participants are limited to members of the Nimble project the retro was created from, and the module is unavailable outside Public SaaS
- − No rate card: the only NimbleRetro-specific price NimbleWork publishes ($15/mo for up to 20 users) sits on a blog post, and the retro 'pricing' page is a product page with a demo form
Keep comparing
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Not sure which to pick? Read our guide on how to choose a retrospective tool.