ISIM is a company with over twenty years' experience in dynamic simulation.

We offer our robust simulation engine, ESL, as well as bespoke consultancy and training services.

Read more about who we are.

ESL 8.3.0 now available

Includes ESL-Studio graphical integrated development environment

ESL-Lite - free entry-level version

ESL-Pro - the full professional version

Read More

Latest Updates

ESL 8.3

Find out more about the multi-rate simulation features in ISIM ESL 8.3


ESL brochure and full documentation including user guide


ESL Software (and additional software)

About ISIM

Read about who we are and what we do


Research papers and other historical documents

ISIM's Products, Consultancy and Services

ISIM develops, maintains and sells its flagship ESL simulation language and graphical front end.

Quotes for the software can be obtained either by contacting the company directly.

You can find information on training in the ESL language on our consultancy and services page.

We also offer bespoke consultancy services, backed up by over twenty years' experience in dynamic simulation.

Visit our case studies pages to see examples of ISIM’s collaborations and to find out how we can help you with your specific needs.

Contact ISIM

Click here to get in touch, request a quote or to discuss your specific requirements