:closed_lock_with_key: multi factor authentication system (2FA, MFA, OTP, FIDO Server)
MFA server for TOTP, push, WebAuthn and more, with RADIUS, LDAP and identity provider plugins.
alternatives to
Duo
Hosted two-factor authentication service with push approvals, used in front of VPNs and applications. A closed product from Cisco.
Side by side
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| privacyIDEA | Full replacement | 1.8k | AGPL-3.0 | Open source | Yes | Python | v3.13.4 | 2026-10-06 |
| LinOTP | Partial | 550 | AGPL-3.0 | Open source | Yes | Python | release/3.4.5 | 2026-09-11 |
Every alternative
2 alternatives
LinOTP - the open source solution for two factor authentication
Token-based MFA server with RADIUS and REST integrations and fewer ready-made connectors.
- Language
- Python
- Licence
- AGPL-3.0
- Stars
- 550
- Latest
- release/3.4.5
- Last push
- 2026-09-11
Head to head
About Duo
- Vendor
- Cisco