LeanCTX

LeanCTX is a context gateway that chooses what an AI system may read from company sources and records the result.

LeanCTX sits between an AI system and the sources it reads: it retrieves relevant evidence, applies source-access and content rules, and records what the integration can see. The product site lists a context gateway, retrieval, context control, memory, model routing, security and a cost-and-outcomes view, plus an SDK and an Enterprise Engine. A walkthrough shows code included, a log with email and customer id masked, and a CSV blocked by policy. Example industries are legal, manufacturing, finance, healthcare, the public sector and software engineering. The site reports GitHub stars and install counts as of 3 Oct 2026 and offers a free start, with documentation and a Discord linked.

LeanCTX at a glance

Best for: Software engineer
Runs on: Web, open source
Pricing: Free starting plan; paid and Enterprise options are listed on the site
Released: March 2026
Category: AI coding tool
Website: leanctx.com

Key features

Context gateway between models and company sources
Retrieval with source-access policies
Content rules that mask or drop fields
Memory and model-routing controls
SDK and an Enterprise Engine
Docs, Discord and a free starting plan

Use it for

Let a coding agent see billing code but not customer emails
Apply the same context rules in legal or healthcare
Measure what context a model actually received

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