Calendly vs Discord vs Slack
| Attribute | |||
|---|---|---|---|
| Category | Events, Scheduling & Booking | Communication | Communication |
| Pricing | Free tier | Free tier | Free tier |
| Starting price | $10/month | $2.99/month | $7.25/month |
| Free tier | Yes | Yes | Yes |
| Free trial | Yes | No | Yes |
| Deployment | Cloud | Cloud | — |
| API available | Yes | Unknown | Yes |
| Platforms | ios, android | ios, android, windows, macos | — |
| Certifications | 4 | — | 8 |
| Integrations | 5 | 3 | 2 |
| Company | Founded 2013 | Founded 2015 | Founded 2009 |
| Feature attributes | |||
| Sso Saml | ✓ Yes | — Unknown | ✓ Yes |
| Rbac | — Unknown | — Unknown | ✓ Yes |
| Mobile App | Ios And Android | — Unknown | — Unknown |
| Webhooks | ✓ Yes | — Unknown | — Unknown |
| Data Export | — Unknown | — Unknown | ✓ Yes |
| Calendar Integrations | ✓ Yes | — Unknown | — Unknown |
| Group Scheduling | ✓ Yes | — Unknown | — Unknown |
| Payment Collection | ✓ Yes | — Unknown | — Unknown |
| Routing Forms | ✓ Yes | — Unknown | — Unknown |
| Self Hosting | — Unknown | — Unknown | — Unknown |
| Video Conferencing | — Unknown | — Unknown | ✓ Yes |
| Team Messaging | — Unknown | — Unknown | ✓ Yes |
| Max Participants | — Unknown | — Unknown | — Unknown |
| Screen Sharing | — Unknown | — Unknown | ✓ Yes |
| Guest Access | — Unknown | — Unknown | — Unknown |
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Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.