The register
The register lists Signable Limited in Bristol 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 Signable Ltd (company number 11965482), a private limited company incorporated in 2019, 7 years ago. Registered office: 3 Unity Street, 1st Floor Arclight House, Bristol, Somerset, BS1 5HH, BS1 5HH. Its filed activity puts it in it, software and media. It has traded under other names before, including Team Signable Ltd.
Holding a licence is the expensive, slow part done. For Signable Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.