The register
The register lists First Tone Ltd in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
At Companies House the business is First Tone Ltd (company number 13741822), a private limited company incorporated in 2021, 4 years ago. Registered office: Venture X,, 1 Ariel Way,, London, W12 7SL, W12 7SL. By its SIC codes the business is in it, software and media.
Holding a licence is the expensive, slow part done. For First Tone Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.