| Core Identity |
| Developer | Signal Foundation | Slack Technologies, Inc. | Mattermost, Inc. | Google | Microsoft Corporation | AMZN Mobile LLC | Workday | CAKE.com |
| Category | Business | Business | Business | Business | Business | Business | Business | Business |
| Platform | Android, iOS | iOS, Android | iOS, Android | Android, iOS | iOS, Android | Android, iOS | iOS, Android | Android, iOS |
| Store Metrics |
| Rating | 4.9 / 5 | 4.1 / 5 | 4.8 / 5 | 4.6 / 5 | 4.8 / 5 | 4.8 / 5 | 4.7 / 5 | 4.7 / 5 |
| Ratings Count | 116,282 | 45,544 | 5,455 | 300,533 | 3,356,480 | 720,087 | 1,752,934 | 1,311 |
| Price | Free | Free | Free | Free | Free | Free | Free | Free |
| Release Date | Jan 15, 2015 | Mar 20, 2013 | Jul 10, 2017 | Feb 28, 2018 | Nov 2, 2016 | Apr 30, 2020 | Jun 5, 2009 | Oct 19, 2020 |
| Last Updated | Mar 5, 2026 | Apr 29, 2026 | Apr 16, 2026 | May 4, 2026 | May 7, 2026 | Apr 7, 2026 | Apr 13, 2026 | Apr 1, 2026 |
| Sentiment & Reviews |
| Sentiment | mixed | mixed | mixed | mixed | - | mixed | negative | - |
| Score | 45/100 | 45/100 | 42/100 | 45/100 | - | 45/100 | 38/100 | - |
| Praises | - Corporate communication tools facilitate connectivity for distributed teams across large organizations
| - Centralized workspace organization allows teams to manage multiple projects and company channels effectively in one place
| - Self-Hosting & Open Source
| - Direct communication via email addresses simplifies connectivity without requiring phone numbers or iCloud accounts
| - | - Comprehensive access to work-related information and administrative tasks simplifies daily operations for employees
| | - |
| Complaints | - Frequent authentication errors and login failures prevent users from accessing work resources
| - Unreliable push notifications prevent users from receiving critical messages and meeting alerts on mobile devices
| - App Stability and Crashes
| - Post-update connectivity errors prevent users from loading messages or accessing their chat history
| - | - Frequent application freezes and slow load times post-update hinder time-sensitive shift selection
| - Authentication & Login Persistence
- Removal of Core Features
| - |
| Requests | - Implementation of a built-in calendar feature to manage office schedules and meetings
| - Simplified channel management tools are needed to filter relevant content and hide unnecessary workspace clutter
| - | - Integrated voice and video calling features are requested to restore previous communication capabilities
| - | - Relocation of the virtual assistant button to prevent interference with core input fields
| - | - |
| Strategic Intel |
| Strengths | - Familiar social-first UX reduces onboarding friction
- Native Live Video optimized for company-wide town halls
| - Integration ecosystem embeds platform into existing enterprise tech stacks
- Slack Connect network effects force external partner adoption
- Intuitive interface reduces cognitive load compared to Microsoft Teams
| - Strong brand reputation in high-security sectors
- Robust self-hosting capabilities
- Clear focus on data sovereignty
| - Native Workspace integration creates high switching costs for existing Google users
- Gemini AI summarization embeds intelligence directly into the document lifecycle
- Cloud-native security architecture simplifies enterprise compliance requirements
| - Deep integration with Microsoft 365 creates high switching costs
- Enterprise-grade security compliance sustains large-scale adoption
- Global infrastructure supports massive user scalability
| - Proprietary integration with internal Amazon HR/Benefits ecosystem
- Persistent document access maintains alumni engagement
- Secure multi-factor authentication protects sensitive payroll data
| - Sana AI Assistant for natural language task execution
- Unified LMS and HCM modules in one experience
- Massive scale with 1.7M+ iOS ratings
| - |
| Weaknesses | - Persistent authentication errors block access
- Application instability disrupts daily mobile workflows
- Announced service discontinuation drives user churn
| - Unreliable mobile notifications causing critical message loss
- Persistent read-state synchronization bugs across platforms
- Cluttered UI navigation for high-volume channel users
| - Poor mobile app stability
- Recurring notification bugs
- Sync issues
| - Post-update connectivity errors prevent message loading
- Threaded conversation layout lacks user-controlled toggles
- High CPU usage on iOS causes hardware overheating
| - High-volume notification culture drives user fatigue
- Feature bloat increases complexity for non-desk workers
- 60-minute meeting limit on free tier restricts utility
| - Frequent application freezes post-update
- Virtual assistant button obstructs core administrative fields
- Excessive battery consumption during background operation
| - Broken biometric authentication persistence
- Removal of critical 'check-in' utility
- Aggressive OS requirements excluding older hardware
| - |
| Pricing | free | freemium | subscription | freemium | freemium | free | free | free |
| Momentum | Maintenance | Active | - | Active | Active | Maintenance | Intense | Intense |
| Update Cadence | 3 versions, ~15d avg | 5 versions, ~5d avg | - | 5 versions, 1 majors/6mo, ~10d avg | 5 versions, 2 majors/6mo, ~7d avg | 5 versions, ~18d avg | 2 versions, 2 majors/6mo, ~3d avg | 5 versions |
