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.
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Simyl Flow
5.5Measure what ships and sticks
Simyl Flow is an outcomes measurement platform for engineering teams in which the retrospective is one of several linked ceremonies, alongside planning poker, demo prep and coaching. Retro boards are pre-populated with six sprint metrics pulled from Jira, Linear, GitHub and CI, AI generates candidate cards from the data, and unfinished action items carry forward — all feeding a six-dimension team health score tracked sprint over sprint.
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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).
Simyl Flow scores 5.5 overall and is best for engineering orgs that already run retros and want them wired into delivery data — teams asking whether last sprint's improvement actually moved cycle time, review latency or change-failure rate, rather than teams shopping for a better sticky-note board. It offers a free tier.
NimbleRetro leads on fun factor, open platform and enterprise-grade. Simyl Flow leads on ease of use, retro toolkit, value, AI & insights and integrations.
Across our eight scoring dimensions, Simyl Flow edges ahead with an overall score of 5.5. That said, the right pick depends on your team — see the dimension-by-dimension breakdown below.
Scores compared
| Detail | NimbleRetro | Simyl Flow |
|---|---|---|
| Category | Retrospectives | All-in-One Agile |
| Team size | Small | Mid-market |
| Free tier | No | Yes |
| Free limit | Free trial only; no permanent free tier published for the retro module. The suite pricing page's only $0 plan (10 users / 10 projects) sits in a tier table hidden on every device, and Retrospectives appear in neither the live tier table nor the suite's full feature-comparison table | 1 team, 10 stakeholders, 2 retros + 2 poker sessions/month, 1 integration, 90-day retention, CSV export |
| Starting price | $15/mo (up to 20 users) | $29/team/mo |
| Est. 3 teams × 8 people | $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 | $87/mo (Pro — flat $29 per team × 3 teams; $72/mo billed annually) |
| Enterprise | Yes | Yes |
| Founded | 2002 | 2024 |
| HQ | Cupertino, CA, United States | Toronto, Canada |
| Data residency | United States | United States |
| Languages | English only | English only |
| Export formats | — | CSV · PDF |
| Features | 21 | 20 |
| Integrations | 4 | 9 |
Feature & integration comparison
Side-by-side checklist across features, integrations and security. Hover a note for details.
| Capability | NimbleRetro | Simyl Flow |
|---|---|---|
| Features | ||
| Custom templates | ✓ | ✓ |
| Anonymous input | ✓ | — |
| Health Checks | — | ✓note |
| Action tracking | ✓ | ✓ |
| Async mode | — | — |
| Whiteboard | — | — |
| Independent voting | ✓note | ✓ |
| Polling | ✓note | — |
| Icebreaker games | — | — |
| Agile Estimations | — | ✓note |
| Team Kudos | — | — |
| AI grouping/clustering | — | — |
| AI action items | — | — |
| AI Summaries | — | ✓ |
| Team Insights | — | ✓note |
| In-meeting AI assistant | — | — |
| Action dashboard | ✓note | ✓ |
| Integrations | ||
| Asana | — | — |
| Azure DevOps | — | — |
| Basecamp | — | — |
| ClickUp | — | ✓note |
| Confluence | — | — |
| GitHub | ✓note | ✓note |
| GitLab | ✓note | ✓note |
| Jira | — | ✓note |
| Linear | — | ✓note |
| Microsoft Teams | ✓note | ✓note |
| Monday.com | — | — |
| Notion | — | ✓note |
| Shortcut | — | ✓note |
| Slack | ✓note | ✓note |
| Trello | — | — |
| Security & Privacy | ||
| SOC 2 | ✓note | — |
| GDPR | ✓ | ✓ |
| SSO / SAML | ✓note | ✓note |
| SCIM provisioning | — | — |
| ISO 27001 | ✓note | — |
| On-premises | — | — |
| Public API | ✓note | — |
| Webhooks | ✓note | — |
| MCP server | ✓note | ✓ |
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, Inc. holds its own SOC 2 Type II, ISO/IEC 27001:2022 and ISO/IEC 42001:2023 attestations, with reports on request through its trust center, and supports SAMLv2/ADFSv3 SSO
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
Simyl Flow — pros
- + Retro boards arrive pre-populated with six sprint metrics (velocity, cycle time, PRs merged, commits, bug rate, unplanned work) pulled from the tools the team already uses, and unfinished actions carry forward with completion-rate tracking — the discussion starts from evidence, and the six-dimension health score answers whether last sprint's change actually landed
- + Unusually broad delivery-data integration set for a tool that runs retros: Jira, Linear, Shortcut, ClickUp, Notion, GitHub/GitLab Issues, plus GitHub, GitLab and Bitbucket repos and their CI pipelines for DORA metrics
- + Official remote MCP server, generally available and not tier-gated — <em>its endpoint and OAuth 2.1 discovery answer live</em>, with dynamic client registration and 17 read-only tools across 8 data domains (including retros, metrics, actions, poker, effectiveness and coaching), so Claude, ChatGPT, Cursor or Windsurf can query sprint data directly
- + Flat per-team pricing ($29–49/team/mo) rather than per-seat, so a 24-person org on three teams pays $87/mo regardless of headcount inside each team
- + Deliberate privacy architecture — individual effectiveness profiles and AI coaching notes are private to the developer (and optionally their manager), there are no leaderboards, source code is never stored, and AI runs on Claude via Amazon Bedrock with no data retention
Simyl Flow — cons
- − <strong>You can't sign up yet.</strong> As of October 2026 every CTA leads to 'Join Waitlist', the sign-in page accepts existing accounts only, and the parent company lists Flow as 'Private Preview' — while the pricing page still sells three plans and a 30-day trial. The vendor (Simyl AI, Inc., founded 2024, Toronto) is an unnamed 'small team of engineers' with no G2/Capterra listing, third-party reviews or press coverage
- − Retro toolkit is thin on facilitator staples: no anonymous submission or private brainstorm, no drag-and-drop grouping, no presentation mode, no recurring or scheduled retros, no retro-board timer, and only four built-in formats plus a custom template against 50+ at retro-native tools — and almost no engagement layer (no icebreakers, GIFs, reactions, music or kudos wall), which makes it a poor fit for teams whose retro problem is participation rather than measurement
- − The health score is computed from delivery signals, not from the team — the vendor is explicit that there are <em>"no surveys, just outcomes"</em>, so there is no survey-based health check, no sentiment analysis and no ROTI; there is no mood capture on the retro board either
- − Enterprise claims are self-attested: 'SOC 2 aligned, not certified' and 'ISO 27001 aligned, not certified', inheriting AWS's certifications rather than holding its own; SSO/SAML sits behind a quote-only tier, there is no SCIM, and audit logs appear only as a sales-page offer rather than a plan feature
- − Export is CSV plus PDF reports, and the PDF report download is Growth-tier only; there is no public REST API and no webhooks, and the MCP server is read-only, so nothing can push data back in programmatically
Keep comparing
Other NimbleRetro comparisons
Other Simyl Flow comparisons
Not sure which to pick? Read our guide on how to choose a retrospective tool.