The register
The register lists Quantumbyte It Ltd in Hertfordshire 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).
Companies House lists the business as Quantumbyte IT Ltd, company number 16405804, a private limited company. The registered office is at Titan Court 2nd Floor, 3 Bishop Square, Hatfield, Hertfordshire, AL10 9NA, AL10 9NA. By its SIC codes the business is in it, software and media.
Holding a licence is the expensive, slow part done. For Quantumbyte It Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.