OlexSys Ltd, a small company based in Durham, England, is a leading developer of the crystallographic package, Olex2. This software is widely recognized as the world's favorite tool for working with small-molecule crystal structures. In addition to Olex2, OlexSys also offers LabSafe, an advanced laboratory chemicals safety management system.

Founded as a spin-out company from Durham University in 2010, OlexSys has remained independent, research-focused, and committed to maintaining strong ties with the academic community, especially with Durham University. The team at OlexSys includes experienced professionals who have been involved in Olex2 development since its inception. Their expertise ranges from software development, non-spherical atom models implementation, and tricky crystal structure handling.

OlexSys also boasts experts in evaluating the quality of crystal structures and assisting with difficult structures. For any inquiries or technical support related to Olex2, customers can reach out to OlexSys via email or an online contact form. OlexSys operates from both its Durham, UK, and Regensburg, Germany offices