Allegro CL®

    • Allegro Common Lisp (Allegro CL® – Download) is the most powerful dynamic object-oriented development system available today, and is especially suited to enterprise-wide, complex application development. Complex applications with billions of objects are now made easy with Allegro CL 11.0. The complexity of today’s software applications and the explosion of data size are pervasive in all fields ranging from Life Sciences to Manufacturing to Financial Analytics. Allegro CL is the most effective system for developing and deploying applications to solve these complex problems in the real world. For more information, contact [email protected].


“Franz has further advanced its industrial-strength Common Lisp platform with the release of Allegro CL 11. Impressive ARM support on both Mac and Linux means switching architectures is painless. Internally, hashtables and sorting are measurably improved. ACL 11 is a great platform for development professionals.”

Jason Cornez CTO, RavenPack International

Allegro CL 11.0 - The Ultimate Neuro-Symbolic AI Platform

    • Combination of classic AI symbolic reasoning + Large Language Models + Graphs
    • Plug-in AllegroGraph for seamless Semantic Knowledge Graph capabilities
    • Use Lisp or Prolog to write rules for symbolic reasoning with or without AllegroGraph.
    • Extract structured and unstructured information from LLMs and store in AllegroGraph.
    • Perform fast, accurate, and intelligent text retrieval and query answering with AllegroGraph’s built in VectorStore




For additional information on these, and many other new features and improvements, please read the release notes for this major new release of Allegro Common Lisp.


  • Powered by Common Lisp, Allegro CL’s true dynamic object technology allows developers to generate leading edge, mission-critical applications that are robust, extensible, and easy to evolve and deploy.

Minimum Supported Operating System Versions

Allegro CL 11.0 is available on the following operating system versions. The Types are either non-SMP or SMP. SMP is not available on all platforms.

Platform Types available
Linux (x86-64) with glibc 2.17 non-SMP, SMP
Linux (ARM) Redhat/CentOS and Amazon Linux (Graviton) non-SMP, SMP
Mac OS X 12.0 (Apple Silicon) non-SMP, SMP
Mac OS X 12.0 (x86-64) non-SMP, SMP
Windows (x86-32) non-SMP, SMP
Windows (x86-64) non-SMP, SMP
FreeBSD (x86-64) SMP