| Price from | — | — |
| Free plan | — | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 1 |
| Spec score · Multi-Factor Authentication Software | 7.7 (#28) | 8.1 (#12) |
| Founded | 2022 | 2019 |
| Headquarters | Sofia, Bulgaria | Vancouver, British Columbia, Canada |
| Integrations | Listed integrations include ADFS, RADIUS, Cisco AnyConnect VPN, FortiClient VPN, Pulse Secure VPN, Aruba Wi-Fi, Cisco Wi-Fi, Google Authenticator, Microsoft Authenticator, and LDAP. | IDmelon SSO supports SAML 2.0 and OIDC and can integrate with Microsoft Entra ID, ADFS, Okta, Ping Identity, and Google Workspace. |
| Purpose | ARK2FA provides multi-factor authentication for ADFS, VPN, and RADIUS clients. | IDmelon lets organizations use existing ID badges, NFC cards, key fobs, and smartphones as manageable FIDO security keys for workforce logins. |
| Support | The Enterprise Edition includes a 24/7 support SLA. | The contact page directs product support requests to its technical team and provides a Vancouver, Canada office address. |
