Pleias builds data infrastructure for enterprise AI, focused on radical data efficiency and full on-premise compliance for organizations handling sensitive information under regulations like the EU AI Act. Its offerings include Stratum, an AI-native enterprise data processing platform that runs entirely on a client's own infrastructure without external API dependencies; Synth, a synthetic data generation tool balancing training-data quality with privacy; and Common Corpus, a 2-trillion-token open dataset with built-in rights-clearing and source traceability. Pleias partners with Mozilla, NVIDIA, AI Alliance, and Wikimedia, and maintains an active open-source presence on GitHub and HuggingFace.