AI tax research and drafting for UK accountants and tax advisers
Tallia (formerly Revax) is a London-based AI platform for tax and accountancy professionals. It answers tax research questions with citations to HMRC guidance, legislation and case law, drafts memos, advice notes and letters for review, and offers document review, Outlook email drafting and shared project workspaces for tax teams. Founded in 2025 by Jack Mander and Alexander Bartlam, Tallia announced a €4 million seed round in November 2026 co-led by Outward VC and the ICAEW.