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StrongKey FIDO Server
What it is
StrongKey FIDO Server (SKFS) is an open-source FIDO Certified server for passwordless authentication in web and mobile applications. It supports FIDO2 and U2F using FIDO Certified authenticators, including Apple and Android platform FIDO keys. Organisations can deploy it on premises or in a hosted data center; high availability, disaster recovery, clustering, and replication are built in. SKFS provides single sign-on and can authorize authenticated users with SAML assertions or JWT tokens. Applications can connect through REST or SOAP web services. Listed integrations include Citrix ADC and Citrix Gateway, LDAP or Active Directory, and PKI. The server also includes a policy module and transaction confirmation for digitally signed business transactions on Android. The Tellaro appliance includes a FIPS 140-2 Level 2 validated TPM, with an optional HSM configuration for Level 3 compliance. Community Edition is free, with unlimited users, applications, and transactions stated for the solution. A standalone installation calls for Rocky Linux 9.3, OpenJDK 21, at least 20 GB of disk space, 4 GB of memory, and a public fully qualified domain name.
For and against
For
- Supports FIDO2 and U2F authenticators
- Offers on-premises and hosted deployment
- Includes SSO with SAML or JWT authorization
- Community Edition is free with unlimited users, applications, and transactions
- Lists LDAP, Active Directory, and PKI integration
Against
- Standalone install requires Rocky Linux 9.3 and OpenJDK 21
- Standalone install needs at least 20 GB disk and 4 GB memory
- Standalone install requires a public fully qualified domain name
The verdict
SKFS combines FIDO authentication with deployment choices, SSO, and application integration interfaces. Its free Community Edition may suit teams able to meet the documented standalone installation requirements.
Who it suits
It suits enterprise and SMB teams implementing passwordless authentication in web or mobile applications. Developers can use its REST or SOAP services, while teams needing deployment control can choose on-premises or hosted data-center options.
Plans and prices
Community Edition
open-source download · unlimited users, applications and transactions
Read 14 Oct 2026 · strongkey.com
Supported commercial versions
StrongKey support, maintenance and upgrades
Read 14 Oct 2026 · strongkey.com
Enterprise / hosted
Fixed-fee or all-inclusive subscription; no per-user or per-transaction fees · enterprise hardware or managed hosting
Read 30 Sep 2026 · strongkey.com
On the record
- API
- Applications access SKFS through REST and SOAP web services rather than embedding the server into each application.docs.strongkey.com · read 14 Oct 2026
- APIs
- Web and mobile applications can integrate with SKFS through REST or SOAP web services.strongkey.com · read 30 Sep 2026
- Authenticator choice
- The product page says users can use existing FIDO-compatible devices and that StrongKey natively supports Apple and Android platform FIDO keys.strongkey.com · read 30 Sep 2026
- Authenticator support
- The product works with existing FIDO authenticators and supports Apple and Android platform keys.strongkey.com · read 14 Oct 2026
- Citrix integration
- StrongKey documents integration with Citrix ADC and describes it as supporting deployments targeting NIST AAL-3.sourceforge.net · read 14 Oct 2026
- Company headquarters
- LinkedIn lists Sunnyvale, California as headquarters, while StrongKey’s about page also identifies offices in Cupertino, California and Durham, North Carolina.linkedin.com · read 14 Oct 2026
- Company size
- LinkedIn lists StrongKey as a privately held computer and network security company with 11–50 employees.linkedin.com · read 14 Oct 2026
- Deployment
- StrongKey describes on-premises and hosted data-center deployment, with high availability, disaster recovery, clustering, and replication built in.strongkey.com · read 30 Sep 2026
- Deployment choices
- Customers can run the product on-premises, in private or public clouds, in StrongKey-hosted data centers or on Tellaro appliances.fidoalliance.org · read 14 Oct 2026
- Developer samples
- StrongKey provides Node.js, JavaScript and Java tutorials, sample applications and a bundled command-line test tool.strongkey.com · read 14 Oct 2026
- Directory integration
- The feature set includes LDAP compatibility and integration with directory servers such as OpenLDAP or Active Directory.docs.strongkey.com · read 14 Oct 2026
- Documentation depth
- The documentation site contains product manuals, versioned release notes, installation instructions, administration material and developer tutorials.docs.strongkey.com · read 14 Oct 2026
- FIDO Alliance status
- FIDO Alliance lists StrongKey as joining in 2014, building a U2F server in 2015 and offering an early FIDO2-certified server.fidoalliance.org · read 14 Oct 2026
- FIDO metadata
- The server supports the FIDO Alliance Metadata Service for authenticator information.strongkey.com · read 14 Oct 2026
- FIDO protocols
- The server supports both U2F and FIDO2 authentication using FIDO Certified authenticators.sourceforge.net · read 14 Oct 2026
- GitHub community
- The public repository shows 222 stars, 56 forks, 11 issues and one commit history entry.github.com · read 14 Oct 2026
- Hardware security
- Tellaro appliances provide a FIPS 140-2 Level 2 TPM by default and an optional Level 3 HSM.strongkey.com · read 14 Oct 2026
- High availability
- Deployment options include built-in high availability, disaster recovery, clustering and replication.strongkey.com · read 14 Oct 2026
