Retro Rabbit
4.4Slack-first retrospectives with async note capture
Retro Rabbit is a Slack-native retrospective tool: the team drops notes into a Slack channel or the web app all sprint long, then runs the retro on a live synced board with drag-to-group, dot voting, a shared timer and assignable action items that carry over to the next retro. The CarrotIQ AI layer is gated to the $40/team/month Pro AI plan. Four-person vendor, Slack is the only integration, and there is still no public changelog.
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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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Retro Rabbit scores 4.4 overall and is best for slack-centric agile teams that want retro notes captured continuously through the sprint and a lightweight live or async board — and that don't need Jira, health checks or a procurement checklist. It offers paid plans from $30/team/mo.
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.
Retro Rabbit leads on ease of use, retro toolkit 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 5.5. 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 | Toronto, Canada |
| Data residency | United States | United States |
| Languages | English only | English only |
| Export formats | CSV · Excel · PDF | CSV · PDF |
| Features | 21 | 20 |
| 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 | ||
| Custom templates | ✓ | ✓ |
| Anonymous input | ✓ | — |
| Health Checks | — | ✓note |
| Action tracking | ✓ | ✓ |
| Async mode | ✓ | — |
| Whiteboard | — | — |
| Independent voting | ✓ | ✓ |
| Polling | — | — |
| Icebreaker games | — | — |
| Agile Estimations | — | ✓note |
| Team Kudos | — | — |
| AI grouping/clustering | — | — |
| AI action items | ✓note | — |
| AI Summaries | ✓note | ✓ |
| Team Insights | — | ✓note |
| In-meeting AI assistant | — | — |
| Action dashboard | ✓ | ✓ |
| 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 | — | — |
| GDPR | — | ✓ |
| SSO / SAML | ✓note | ✓note |
| SCIM provisioning | — | — |
| ISO 27001 | — | — |
| On-premises | — | — |
| Public API | — | — |
| Webhooks | — | — |
| MCP server | — | ✓ |
Retro Rabbit — pros
- + Genuine Slack-first capture — notes land in the channel throughout the sprint, so the board opens full instead of starting with silent writing
- + Board covers the basics properly: drag-to-group with editable group names, dot voting with a configurable 1–50 vote budget, a shared pause/resume timer, and a per-user anonymity toggle
- + Action items carry forward — a dedicated <em>Old / Unresolved Items</em> tab plus per-room and per-person trackers, with Slack reminders to assignees
- + A GIPHY picker on notes that the marketing site never mentions — the one bit of levity on an otherwise plain board
- + Flat $30/team/month with unlimited users (3 teams of 8 = $90/mo), and CSV/XLSX/PDF export on every tier including Starter
Retro Rabbit — cons
- − Slack is the only integration — no Jira, Teams, Confluence, GitHub, Linear or Azure DevOps, and no public API, webhooks or MCP
- − No health checks, team radars or sentiment tracking; the only longitudinal view is a notes-per-day bar chart per room
- − AI is two calls — a per-retro summary and one action-item suggestion. The site's <em>intelligent note grouping</em> claim has no counterpart in the shipped web app
- − Enterprise controls are thin: SSO/SAML is Enterprise-tier only, no SCIM, no audit logs and no SOC 2 of its own. The privacy policy carries no GDPR or CCPA commitments and says retro feedback is not shared with third parties, the Slack Marketplace listing answers <em>uses large language models: no</em> and <em>has a dedicated security team: no</em>, and neither says where CarrotIQ processes notes
- − No free tier and no public changelog, from a four-person vendor whose marketing site has not changed since early 2025
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 Retro Rabbit comparisons
Other Simyl Flow comparisons
Not sure which to pick? Read our guide on how to choose a retrospective tool.