No. 12 of 31 ·Single Sign-On Software

LemonLDAP::NG

Web · Linux · Self-hosted · API

Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely2 of 6 device platforms
DocumentedPlans, terms and facts published

LemonLDAP::NG is ranked #12 of 31 in single sign-on software on Freedom251. It runs on API, Linux, Self-hosted, Web. There is a free plan.

LemonLDAP::NG plans and pricing

All plans

Free software Free GPL-2.0-or-later github.com · 1 Oct 2026

Compared on single sign-on software

Free plan: Yes

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The record

Purpose: LemonLDAP::NG provides web single sign-on, access management and identity federation.
AAA capabilities: It provides authentication, authorization through application access rules, and accounting through user identity in logs.
Authentication sources: Authentication supports LDAP, Active Directory, Kerberos, databases, SSL, social networks, CAS, SAML and OpenID Connect.
Identity federation: It implements CAS, SAML and OpenID Connect and can act as a gateway between these protocols.
OpenID Connect security: Its ANSSI OpenID Connect mode is described as compliant with ANSSI security guidelines.
Certification: The project states that it is FranceConnect certified.
Application integration: Applications can integrate through HTTP headers, CAS, SAML, OpenID Connect, HTTP Basic replay or form replay.
API: The software provides REST and SOAP APIs for direct communication with custom applications.
Session controls: The Manager includes a session explorer and can restrict users by session count, IP address or user-per-IP rules.
Web servers: Portal and Manager run on FastCGI or PSGI-compatible servers, with Apache and Nginx documented as examples.
Supported distributions: The team supports Debian, Ubuntu, RHEL and derivatives such as Rocky Linux and AlmaLinux.
Deployment: Official downloads include RHEL/CentOS RPM repositories, Debian packages, Docker images and source tarballs.
Operational limitation: Handler deployments require applications to share the SSO server DNS suffix unless Cross Domain Authentication is used, and centralized traffic must be sized to avoid a bottleneck.
Long-term support: Long Term Support versions receive security fixes without software updates.
Price from: Free

Where it ranks on Freedom251

Best Single Sign-On Software in 2026#12 of 31

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Sources

lemonldap-ng.org· checked 1 Oct 2026
lemonldap-ng.org/documentation/latest/applications.html· checked 1 Oct 2026
lemonldap-ng.org/documentation/2.0/features.html· checked 1 Oct 2026
lemonldap-ng.org/documentation/3.0/platformsoverview.htm· checked 1 Oct 2026
lemonldap-ng.org/documentation/latest/documentation.html· checked 1 Oct 2026
lemonldap-ng.org/download.html· checked 1 Oct 2026
lemonldap-ng.org/documentation/2.0/prereq.html· checked 1 Oct 2026
github.com/LemonLDAPNG/lemonldap-ng· checked 1 Oct 2026