The register
The register lists Datasite UK Ltd. in London as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker and Skilled Worker, 2 routes in all, and has done since at least 2026. The register records its rating as Worker (A rating).
Datasite UK Ltd. is the registered name (Companies House number 03829230), a private limited company on the register since 1999. The registered office is at 15 Bonhill Street, London, England, EC2A 4DN, EC2A 4DN. By its SIC codes the business is in it, software and media. It has traded under other names before, including Merrill Corporation Ltd., Merrill Limited.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.