STM Document Engineering Private Limited, also known as STM DOCS, is an India-based text processing company focused on electronic production of scientific, technical, and medical documents. Its work centers on T E X, an open-source text processing language and program that runs across platforms, including mobile devices and cloud services. The company emphasizes free and open-source software, open standards, and formats, and offers the software it uses to process content as services for customers.

Its offerings include typesetting and text-processing services, alongside several cloud-based production tools. T E X Folio is a journal production system for publishers and text-processing companies involved in academic journal publishing, delivered as software as a service. Neptune is a proofing framework for L A T E X authors, supporting review of changes, editing, rapid proof generation, and downloads through a browser. Neon automates PDF production from XML and supports Elsevier journal article DTD and NLM/JATS DTD. STM DOCS describes its approach as community-supported, free-software-based, worker-owned, and hand-made.