Arc53 builds AI infrastructure for organizations that need to own what they deploy. Founded in 2019 and based in Edinburgh, the company covers the full AI/ML stack: custom LLM deployments, computer vision and OCR systems, predictive analytics, and MLOps. Their clients include HM Government, Siemens, PwC and Deloitte across more than 200 production deployments. Their flagship product is DocsGPT, an open-source GenAI platform with 18,000+ GitHub stars used to run RAG pipelines, build AI agents, and serve LLM inference entirely on your own infrastructure. It connects to structured and unstructured data sources, supports every major LLM provider, and works with the vector databases you already have. No cloud dependency required.