Isaacus

Isaacus is a legal AI research company building sovereign, hallucination-free legal models. Its models are trained on the Blackstone Corpus, one of the world's largest proprietary repositories of legal data, covering legislation, cases, regulations, contracts, books and journal articles from around the world. The Kanon model family handles embedding, reranking, enrichment, extraction and zero-shot classification of legal text, benchmarking 26% more accurate and 30% faster than general-purpose alternatives. Isaacus also maintains semchunk, the most widely used open-source semantic chunking algorithm, at over 4 million downloads a month.