| Price from | $12/mo | €1.20/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Plans published | 6 | 11 |
| Spec score · Business Phone Systems | 9.1 (#10) | 8.6 (#36) |
| Auto attendant | Yes | Yes |
| Business numbers | multiple | multiple |
| Call routing | Calls can be sent to the right person, team, or backup. | Users can build IVR menus, ring groups and queues in a visual editor and route calls using availability, caller needs and time of day. |
| Desktop and mobile apps | Yes | Yes |
| Encryption | KrispCall says website data transfers use HTTPS encryption and calls are encrypted while transferred from agents to KrispCall. | The maker says Voxbi uses HTTPS, SIP TLS and WebRTC across its communication channels. |
| Free plan | No | Yes |
| Integrations | KrispCall advertises connections with more than 100 CRM and business tools, including HubSpot, Salesforce, Pipedrive, Zoho CRM, Zapier, Zendesk, Slack, and Microsoft Teams. | Voxbi offers integrations with Odoo, Microsoft 365 and Microsoft Teams, plus a REST API and webhooks for other systems. |
| Product | KrispCall describes itself as an AI-powered communication platform for business calls, messaging, coaching, and CRM workflows. | Voxbi is a cloud phone system that replaces on-premises PBX hardware with a browser-based app. |