Blitzy is a Cambridge, Massachusetts AI company that builds an autonomous software development platform for large enterprises. The platform reverse-engineers an existing codebase into a knowledge graph and then orchestrates thousands of AI agents over extended inference runs lasting days or weeks to modernize legacy systems and build new applications, leaving human engineers to finish the remainder. It is aimed at codebases ranging from one million to over 100 million lines of code, and the company reports autonomously completing roughly 80% of a development project. Founded in 2023 by Brian Elliott and Sid Pardeshi, it raised $200 million at a $1.4 billion valuation in May 2026.
What sets it apart
Built for codebases far larger than a model context window — up to 100M+ lines — by converting the repository into a knowledge graph first and then running thousands of coordinated agents across multi-day inference, rather than serving single-file coding assistance. It is model-agnostic, routing across Gemini, GPT and Claude, and reports 66.5% on the SWE-Bench Pro benchmark.
