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).
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Simyl Flow
5.4Measure what ships and sticks
Simyl Flow is an outcomes measurement platform for engineering teams in which the retrospective is one of five linked ceremonies (planning poker, standups, demo prep, retros, 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 3.6 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).
Simyl Flow scores 5.4 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 and enterprise-grade. Simyl Flow leads on ease of use, retro toolkit, value, AI & insights, integrations and open platform.
Across our eight scoring dimensions, Simyl Flow edges ahead with an overall score of 5.4. 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. 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 | 1 team, 10 stakeholders, 2 retros + 2 poker sessions/month, 1 integration, 90-day retention, CSV export |
| Starting price | $10/user/mo (Nimble Team tier, USD; standalone NimbleRetro is quote-only) | $29/team/mo |
| Est. 3 teams × 8 people | $240/mo (24 users x $10/user/mo Nimble Team tier); standalone NimbleRetro is quote-only | $87/mo (Pro — flat $29 per team × 3 teams; $72/mo billed annually) |
| Enterprise | Yes | Yes |
| Founded | 2002 | 2024 |
| HQ | Cupertino, CA, United States | — |
| Data residency | — | United States |
| Languages | English only | English only |
| Export formats | — | CSV |
| Features | 16 | 24 |
| Integrations | 2 | 9 |
Feature & integration comparison
Side-by-side checklist across features, integrations and security. Hover a note for details.
| Capability | NimbleRetro | Simyl Flow |
|---|---|---|
| Features | ||
| AI Summaries | — | ✓ |
| AI grouping/clustering | — | — |
| AI action items | — | — |
| Action tracking | ✓ | ✓ |
| Team Insights | — | ✓note |
| Polling | ✓ | — |
| Action dashboard | ✓note | ✓ |
| Custom templates | ✓ | ✓ |
| Anonymous input | ✓ | — |
| Independent voting | — | ✓ |
| Async mode | — | ✓note |
| Agile Estimations | — | ✓note |
| Health Checks | — | ✓note |
| Team Kudos | — | ✓note |
| Whiteboard | — | — |
| Integrations | ||
| Asana | — | — |
| Azure DevOps | — | — |
| Basecamp | — | — |
| ClickUp | — | ✓note |
| Confluence | — | — |
| GitHub | — | ✓note |
| GitLab | — | ✓note |
| Jira | — | ✓note |
| Linear | — | ✓note |
| Microsoft Teams | ✓note | ✓note |
| Monday.com | — | — |
| Notion | — | ✓note |
| Shortcut | — | ✓note |
| Slack | ✓note | ✓note |
| Trello | — | — |
| Security & Privacy | ||
| SOC 2 | ✓note | ✓note |
| GDPR | ✓ | ✓ |
| SSO / SAML | ✓note | ✓note |
| SCIM provisioning | — | — |
| ISO 27001 | ✓note | ✓note |
| On-premises | — | ✓note |
| Public API | ✓note | — |
| Webhooks | ✓note | — |
| MCP server | — | ✓ |
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)
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 — the discussion starts from evidence rather than recall
- + 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 MCP server with 17 read-only tools, generally available and not tier-gated, so Claude, ChatGPT, Cursor or Windsurf can query sprint metrics, health scores and blocker summaries directly
- + Action items carry forward across sprints with completion-rate tracking, and the six-dimension health score answers whether last sprint's change actually landed
- + 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 — scores are team-level not individual, coaching notes are visible only to the developer and their manager, source code is never stored, and AI runs on Amazon Bedrock with no data retention
Simyl Flow — cons
- − Retro toolkit is thin on facilitator staples: no documented timer or timeboxed phases, no anonymous submission, no drag-and-drop grouping, no presentation mode, no recurring or scheduled retros, and only 5 built-in templates against 50+ at retro-native tools
- − Almost no engagement layer — no icebreakers, GIFs, reactions, music or kudos wall; the product is deliberately metrics-serious, 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 — there is no survey-based health check, mood tracking, sentiment analysis or ROTI, so how the team <em>feels</em> is never captured
- − 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, and there is no SCIM or audit log
- − Export is CSV only, and there is no public REST API or webhooks — the MCP server is read-only, so nothing can push data back in programmatically
- − Young vendor (Simyl AI, Inc., founded 2024) that self-describes as 'a small team of engineers', with no published HQ, named founders, third-party reviews or G2/Capterra presence — a real durability question for procurement
- − Free tier is genuinely small (1 team, 10 stakeholders, 2 retros/month, 1 integration, 90-day retention), and Azure DevOps is still 'coming soon' rather than shipped
Keep comparing
Other NimbleRetro comparisons
Other Simyl Flow comparisons
Not sure which to pick? Read our guide on how to choose a retrospective tool.