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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NimbleRetro
3.6Time-boxed retros with 5-Why root cause analysis
NimbleRetro is the retrospective module inside NimbleWork's broader Nimble agile platform. It runs structured, time-bound retros through Icebreaker, Ideation, Grouping, Voting, and Root Cause Analysis stages, with anonymous input, action item tracking, and a 5-Why root cause workflow. Native iOS and Android apps complement the web product, and action items convert directly into Nimble workitems (user stories and cards).
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.
NimbleRetro scores 3.6 overall and is best for small agile teams that want a no-frills retro with built-in root cause analysis and a mobile companion app, especially teams already using the wider NimbleWork (SwiftKanban / Nimble) suite. It offers paid plans from $10/user/mo (Nimble Team tier, USD; standalone NimbleRetro is quote-only).
IdeaBoardz leads on value. NimbleRetro leads on retro toolkit, fun factor, integrations and enterprise-grade.
Across our eight scoring dimensions, NimbleRetro edges ahead with an overall score of 3.6. 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 it does not list Retrospectives among its features |
| Starting price | Free | $10/user/mo (Nimble Team tier, USD; standalone NimbleRetro is quote-only) |
| Est. 3 teams × 8 people | Free (no paid tier) | $240/mo (24 users x $10/user/mo Nimble Team tier); standalone NimbleRetro is quote-only |
| Enterprise | No | Yes |
| Founded | 2010 | 2002 |
| HQ | Pune, India | Cupertino, CA, United States |
| Data residency | — | — |
| Languages | English only | English only |
| Export formats | PDF · Excel | — |
| Features | 9 | 16 |
| Integrations | 0 | 2 |
Feature & integration comparison
Side-by-side checklist across features, integrations and security. Hover a note for details.
| Capability | IdeaBoardz | NimbleRetro |
|---|---|---|
| Features | ||
| AI Summaries | — | — |
| AI grouping/clustering | — | — |
| AI action items | — | — |
| Action tracking | — | ✓ |
| Team Insights | — | — |
| Polling | — | ✓ |
| Action dashboard | — | ✓note |
| 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 | — | ✓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 | — | — |
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
NimbleRetro — pros
- + Structured 5-Why root cause workflow built into the retro flow
- + Anonymous input and time-bound stages keep retros focused
- + Native iOS and Android apps for mobile participation
- + NimbleWork runs an annual SOC 2 Type II audit and an ISO/IEC 27001:2022 audit, with SAMLv2/ADFSv3 SSO at the platform level
- + Action items convert directly into Nimble work items, so follow-up lands in the same backlog the team already works from
NimbleRetro — cons
- − Only four templates, and custom templates cap out at four columns
- − No SCIM provisioning or audit logs documented; SSO and the SOC 2 / ISO 27001 attestations sit at the NimbleWork platform level, not the retro module
- − Comparison pages tick 'Generative AI' for NimbleRetro, but no retro AI (clustering, summaries, sentiment) is documented — NimbleWork's AI Agents are a separately licensed add-on aimed at Nimble cards and analytics
- − No documented export of a retro board in any format
- − Thin direct-integration story for the agile stack — no documented Jira, GitHub, Linear, or Azure DevOps hooks for the retro module
- − Participants are limited to members of the Nimble project the retro is created from
- − NimbleRetro's own pricing page is demo-gated; the only published rate card is the Nimble suite's ($10/user/mo Team, $26/user/mo Business)
Keep comparing
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Not sure which to pick? Read our guide on how to choose a retrospective tool.