The register
The register lists Dialogue Earth in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
At Companies House the business is Dialogue Earth (company number 06477262), a company limited by guarantee incorporated in 2008, 18 years ago. The registered office is at 15 Printing House Yard, Perseverance Works, London, E2 7PR, E2 7PR. By its SIC codes the business is in it, software and media. It has traded under other names before, including Dialogue Earth Ltd., China Dialogue Trust.
Holding a licence is the expensive, slow part done. For Dialogue Earth the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.