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OpenOTP Authentication Server

openotp.com

From €0.16/mo Free plan WindowsmacOSLinuxiOSAndroidSelf-hosted
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Spec score 8.3 #10 of 52 in Multi-Factor Authentication Software

What it is

OpenOTP Authentication Server is an authentication and identity management solution for multi-factor access, offered for cloud or on-premise deployment. It supports mobile push, smart-card certificates, secure magic links, YubiKey, FIDO2 passkeys and software tokens, alongside factors such as SMS, email, hardware tokens and OATH. Federated access options include SAML, OIDC and OAuth. Directory and identity integrations include Active Directory, LDAP, Entra ID, Okta, Google, Ping Identity and One Identity. The server also provides EAP network access control, mobile electronic signatures and mobile badging. Windows and macOS login plugins are listed, as are PAM plugins for Linux and macOS. OpenOTP is a WebADM sub-package and cannot be installed standalone. Pricing is on request, with a 30-day trial: the cloud trial supports up to 250 OpenOTP users and 50 SpanKey hosts; the on-premise trial supports up to 10 users and includes two active-active HA servers. The Freeware plan costs nothing and includes documentation and forum support only. Enterprise Edition is listed at €1.90 a year, and Enterprise Edition + SLA at €2.28 a year; both prices are shown per user/month based on 250 users and billed annually.

Spec sheet

Product
OpenOTP is an authentication and identity management solution for multi-factor authentication.Read 9 Oct 2026 · openotp.com
Intended users
RCDevs describes its security solutions as serving SMEs and large corporations across IT, finance, healthcare, and government.Read 9 Oct 2026 · rcdevs.com
Deployment
OpenOTP is offered for cloud or on-premise deployment.Read 9 Oct 2026 · openotp.com
Support
The Freeware plan includes documentation and forum support only; the Enterprise + SLA plan includes SLA support for bug reporting.Read 9 Oct 2026 · rcdevs.com
Headquarters
Esch-sur-Alzette, LuxembourgRead 28 Sep 2026 · openotp.com
Additional capabilities
The server also provides EAP network access control, mobile electronic signatures, and mobile badging.Read 9 Oct 2026 · rcdevs.com
Authentication methods
Supported methods include mobile push, smart-card certificates, secure magic links, YubiKey, FIDO2 passkeys, and software tokens.Read 9 Oct 2026 · openotp.com
Company headquarters
RCDevs lists its European headquarters at 1 Boulevard du Jazz, 4370 Esch-sur-Alzette, Luxembourg.Read 9 Oct 2026 · rcdevs.com
Deployment requirement
OpenOTP Authentication Server is a WebADM sub-package and cannot be installed standalone.Read 9 Oct 2026 · rcdevs.com
Desktop integrations
RCDevs lists OpenOTP login plugins for Windows and macOS, plus PAM plugins for Linux and macOS.Read 9 Oct 2026 · rcdevs.com
Directory integrations
OpenOTP integrates with Active Directory, LDAP, Entra ID, Okta, Google, Ping Identity, and One Identity.Read 9 Oct 2026 · rcdevs.com
Federation
The site lists SAML, OIDC, and OAuth for federated access.Read 9 Oct 2026 · openotp.com
On-premise trial
The on-premise trial includes all features, two active-active HA servers, and up to 10 users for 30 days.Read 9 Oct 2026 · rcdevs.com
SaaS trial
The cloud trial lasts 30 days and supports up to 250 OpenOTP users and 50 SpanKey hosts.Read 9 Oct 2026 · rcdevs.com

Plans and prices

Freeware Free 25 users · 10 SpanKey hosts · 1 year · 1 server, no HA · 20 SMS credits and 20 e-Signature credits, each valid 1 month · documentation and forum support Read 9 Oct 2026 · rcdevs.com
Enterprise Edition €1.90 a year Annual billing; price shown per user/month, based on 250 users 40 SpanKey hosts · 2 active servers with HA · maintenance included · all integrations and authentication methods · no SLA support Read 9 Oct 2026 · rcdevs.com
Enterprise Edition + SLA €2.28 a year Annual billing; price shown per user/month, based on 250 users 40 SpanKey hosts · 2 active servers with HA · maintenance included · all integrations and authentication methods · SLA support for bug reporting Read 9 Oct 2026 · rcdevs.com

Every OpenOTP Authentication Server plan and price →

Strong points and limits

Strong points

  • Cloud and on-premise deployment are offered.
  • Supports passkeys, mobile push and hardware tokens.
  • Integrates with listed directories and identity services.
  • 30-day trials are available for both deployments.
  • Adaptive access policies and device trust controls are available.

Limits

  • Cannot be installed without WebADM.
  • Freeware support is limited to documentation and forums.
  • Pricing is on request.
  • Cloud trial supports up to 250 OpenOTP users.

Who it suits

It suits organizations needing multi-factor authentication across cloud or on-premise environments, including SMEs and large corporations in IT, finance, healthcare or government. Buyers should account for the WebADM installation requirement and choose between forum-only support and an SLA plan.

Verdict

OpenOTP lists a broad range of authentication methods, integrations and deployment options. It requires WebADM, and support levels and trial limits differ by plan and deployment.

Where Specifiction places it

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