Cabinet Office · production
Assist
"Assist is a bespoke Generative AI tool to support members of the government communications profession in their roles in tasks such as brainstorming, creating first draft content and reviewing work."
Publicly known
- Owner: Cabinet Office
- Vendor: Westminster Heritage Limited, Mondo Rosso, Happysoft, Numswork
Undisclosed
- Model architecture
- Model performance benchmarks
- Training data provenance
Who is actually being paid
Supplier arrangement · described jointly for all 4 suppliers
Role
All suppliers have contributed through standard software development practices, building to Cabinet Office objectives and standards.
Procurement procedure
Open
Data access terms
External supplier access was resricted to project-only data on a need to know basis. External suppliers had no access to personal data.
Westminster Heritage Limited
08865055Verified at Companies House · checked 4 November 2026
Registered as WESTMINSTER HERITAGE LIMITED · Active · incorporated 2014
View on the registerMondo Rosso
05321530Verified at Companies House · checked 4 November 2026
Registered as MONDO ROSSO LTD · Active · incorporated 2004
View on the registerHappysoft
SC695960Verified at Companies House · checked 4 November 2026
Registered as HAPPYSOFT LTD · Active · incorporated 2021
View on the registerNumswork
08508587Verified at Companies House · checked 4 November 2026
Registered as NUMSWORK LTD · Active · incorporated 2013
View on the registerSource: ATRS record · last updated Thu Jul 30 2026