Retro Rabbit
4.4Slack-first retrospectives with async note capture
Retro Rabbit is a Slack-native retrospective tool that lets teams capture notes throughout the sprint from Slack or the web app, then runs the retro on a synced board with drag-and-drop grouping, voting and assignable action items. The CarrotIQ AI layer is gated to the Pro AI plan. No public changelog and no visible feature change since April 2025 — ask for a roadmap before committing.
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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.
Full review →Summary
Retro Rabbit scores 4.4 overall and is best for slack-centric agile teams that want to capture retro notes continuously through the sprint and run lightweight live or async retros without leaving chat. It offers paid plans from $30/team/mo.
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.
Retro Rabbit leads on ease of use and fun factor. Simyl Flow leads on AI & insights, integrations, open platform and enterprise-grade.
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 | Retro Rabbit | Simyl Flow |
|---|---|---|
| Category | Retrospectives | All-in-One Agile |
| Team size | Small | Mid-market |
| Free tier | No | Yes |
| Free limit | 14-day free trial, no credit card required | 1 team, 10 stakeholders, 2 retros + 2 poker sessions/month, 1 integration, 90-day retention, CSV export |
| Starting price | $30/team/mo | $29/team/mo |
| Est. 3 teams × 8 people | $90/mo | $87/mo (Pro — flat $29 per team × 3 teams; $72/mo billed annually) |
| Enterprise | Yes | Yes |
| Founded | — | 2024 |
| HQ | Boston, United States | — |
| Data residency | — | United States |
| Languages | English only | English only |
| Export formats | CSV · Excel · PDF | CSV |
| Features | 16 | 24 |
| Integrations | 1 | 9 |
Feature & integration comparison
Side-by-side checklist across features, integrations and security. Hover a note for details.
| Capability | Retro Rabbit | Simyl Flow |
|---|---|---|
| Features | ||
| AI Summaries | ✓note | ✓ |
| AI grouping/clustering | ✓note | — |
| AI action items | ✓note | — |
| Action tracking | ✓ | ✓ |
| Team Insights | — | ✓note |
| Polling | — | — |
| Action dashboard | — | ✓ |
| 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 |
| Monday.com | — | — |
| Notion | — | ✓note |
| Shortcut | — | ✓note |
| Slack | ✓ | ✓note |
| Trello | — | — |
| Security & Privacy | ||
| SOC 2 | ✓note | ✓note |
| GDPR | — | ✓ |
| SSO / SAML | ✓note | ✓note |
| SCIM provisioning | — | — |
| ISO 27001 | — | ✓note |
| On-premises | — | ✓note |
| Public API | — | — |
| Webhooks | — | — |
| MCP server | — | ✓ |
Retro Rabbit — pros
- + Genuine Slack-first workflow — notes get captured in Slack throughout the sprint, not just at retro time
- + Reduces recency bias by collecting feedback continuously instead of in a 5-minute silent write
- + Simple, opinionated UX with drag-and-drop grouping and dot voting
- + CarrotIQ covers grouping, action-item suggestions and retro summaries on the $40/team/mo Pro AI plan
- + Flat per-team pricing with unlimited users, and CSV/XLSX/PDF export on every tier including Starter
Retro Rabbit — cons
- − Slack is the only chat/issue-tracker integration — no Jira, Teams, Confluence, GitHub, Linear or Azure DevOps
- − No health checks, team radars or longitudinal trend reporting
- − No org-level dashboards, cross-team rollups or action kanban
- − No public API, webhooks or MCP server — data leaves only as a file export
- − Enterprise controls are thin: SSO is Enterprise-tier only, no SCIM, no audit logs, and the privacy policy carries no GDPR or CCPA commitments
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 Retro Rabbit comparisons
Other Simyl Flow comparisons
Not sure which to pick? Read our guide on how to choose a retrospective tool.