The integrated cross-platform development tool for ANSI Common Lisp LispWorks logo


LispWorks is an implementation of ANSI Common Lisp running on Windows, Linux, Mac OS X, FreeBSD, x86/x64 Solaris, SPARC/Solaris and HP-UX.

LispWorks is source code compatible across all supported platforms.

LispWorks offers many features including an advanced Common Lisp compiler, interpreter, runtime system, language extensions and the LispWorks IDE.

LispWorks on Mac OS XLispWorks on WindowsLispWorks on Linux/GTK+
The LispWorks IDE on Mac OS X The LispWorks IDE on Windows The LispWorks IDE on Linux/GTK+
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Download the LispWorks product information sheet.

Details of extra features specific to certain platforms are on these pages: LispWorks for Windows, LispWorks for Linux, LispWorks for Macintosh, LispWorks for FreeBSD, LispWorks for x86/x64 Solaris, LispWorks for UNIX (SPARC Solaris, PA-RISC/HP-UX).

LispWorks is available in several editions, described below, on Windows, Linux, FreeBSD, x86/x64 Solaris and Mac OS X. See here for details of LispWorks licensing on SPARC/Solaris and HP-UX.

Personal Edition (32-bit)

LispWorks Personal Edition is intended for personal and educational Lisp programming. It is available free of charge.

While the Personal Edition includes the full Common Lisp compiler and development environment, it does limit program size and duration and it does not support application delivery.

Download LispWorks Personal Edition Now!

Professional Edition (32-bit)

LispWorks Professional Edition includes everything you need for commercial Common Lisp software development and application delivery. CLIM 2.0 is included to support legacy applications.

We do not charge runtime license fees for applications developed with the Professional Edition.

There is no 64-bit Professional Edition.

Enterprise Edition (32-bit)

LispWorks Enterprise Edition includes all the features of the Professional Edition, and provides further support for software needs of the modern enterprise, including:

  • Database access via ODBC or native Oracle, PostgreSQL and MySQL interfaces through Common SQL.
  • Industry standard distributed computing through LispWorks ORB.
  • Expert system programming through KnowledgeWorks® which has an embedded Prolog compiler.

We do not charge runtime license fees for applications developed with the Enterprise Edition (version 4.2 and later).

Enterprise Edition (64-bit)

LispWorks Enterprise Edition (64-bit) is available on Macintosh, Windows, Linux, FreeBSD, x86/x64 Solaris and SPARC/Solaris platforms. It has the same features as Enterprise Edition (32-bit) plus the power of 64-bit computing.

LispWorks Enterprise Edition (64-bit) and LispWorks Enterprise Edition (32-bit) are licensed separately. There is no 64-bit Professional Edition.

Further Information

See the main LispWorks features in each edition and platform.

Here is detail about system requirements, also the LispWorks FAQ, information about pricing and how to order.

If you would like to try LispWorks Professional or Enterprise before you buy, ask for an evaluation license.

Here is a brief history of the LispWorks implementation.

If you need further information about LispWorks, please send e-mail to .

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