475 Cumulus

475 Cumulus is a consultancy that adds language model features to software that is already in production. It targets engineering leaders such as technical directors and heads of engineering. The team ships code into the client's own repository rather than building separate demos.

What 475 Cumulus offers

• In-app copilots — assistants that use product state and permissions inside existing views.
• Retrieval and semantic search — pipelines over a client's databases, documents and interfaces.
• Tool-calling and agents — layers that call product APIs with permission checks and audit logs.
• Classification and extraction — structured output from unstructured input.
• Language model middleware — a server-side proxy handling routing, caching, rate limits and failover.

Who it works with

The firm works inside existing stacks, including React, Next.js, Node and Python, and rolls features out step by step behind feature flags. Earlier material says it also serves short-term consulting and longer product engagements.