Addy.io vs HEY vs Missive vs Slack
| Attribute | ||||
|---|---|---|---|---|
| Category | Cybersecurity | Communication | Communication | Communication |
| Pricing | Free tier | Paid | Paid | Free tier |
| Starting price | $1/month | $99/month | $14/seat/month | $7.25/month |
| Free tier | Yes | No | No | Yes |
| Free trial | No | Yes | Yes | Yes |
| Deployment | — | — | — | — |
| API available | Unknown | Unknown | Unknown | Yes |
| Platforms | — | — | — | — |
| Certifications | — | — | — | 8 |
| Integrations | — | — | 1 | 2 |
| Company | — | Founded 1992 | — | Founded 2009 |
| Feature attributes | ||||
| Sso Saml | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Rbac | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Mobile App | — Unknown | — Unknown | — Unknown | — Unknown |
| Webhooks | — Unknown | — Unknown | — Unknown | — Unknown |
| Data Export | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Video Conferencing | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Team Messaging | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Max Participants | — Unknown | — Unknown | — Unknown | — Unknown |
| Screen Sharing | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Guest Access | — Unknown | — Unknown | — Unknown | — Unknown |
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.