Contract review that keeps pace with the deal

A SaaS B2B business working with Cloud Combinator on AWS. The client is anonymised at their request.

The challenge had four focus areas, each of which had to be solved for the tool to earn a place in a legal team's workflow.

We structured the build so that legal output quality was proven early, before investment in the heavier document-rendering and orchestration work.

The proof of concept was designed against a clear set of acceptance criteria: a genuine redlined Word document with native Track Changes, a populated legal risk and approval summary, a client amendment letter and a Bullhorn audit note, all in UK English with a disclaimer on every page, produced end to end from a single uploaded contract.

• Faster, consistent reviews — The same standards are applied to every contract, with a median review target of under three minutes and a worst case within five, against acceptance targets of high clause-detection precision and recall.
• Faithful redlines — Native Word Track Changes are injected across the body, headers, footers, footnotes and endnotes, attributed and dated, so the output drops straight into a lawyer's normal workflow.
• Built-in governance — Deviations are routed against the client's approval matrix, every action is written to an audit trail in DynamoDB, a per-deal cost circuit breaker caps spend, and an UK English lint pass and footer disclaimer are enforced on every document.
• Works where legal already works — The agent is reachable through a secure private API and, optionally, from inside Microsoft 365 Copilot Chat, with contracts staying in the AWS account throughout.
• Handover — The POC ships with defined acceptance criteria and an evaluation harness that measures output quality against golden contracts hand-prepared by the client's legal team.

With the proof of concept proving the pattern, the natural next steps are a path to production and a set of extensions already scoped, including write-back of audit notes to Bullhorn, pulling final signed documents from DocuSign for comparison, and longer-term conversational memory so a returning reviewer picks up exactly where they left off.