Tallia, a London startup formerly branded as Revax, has locked down €4 million in seed capital to push its AI research and drafting platform deeper into the tax and accounting sector.
Outward VC and the Institute of Chartered Accountants in England and Wales (ICAEW) co-led the round. Portfolio Ventures, Expedite Capital, Paul Forster, Angus Miln, and a group of angels also chipped in.
The investment lands amid a wave of European dealmaking in AI-powered tax and accounting tools. Germany’s mika raised €6 million for an AI-native alternative to traditional firms. Belgium’s Dytto pulled in €1.5 million for an AI assistant aimed at accounting practices. Italy’s A-Cube secured €4 million for digital tax compliance, and London’s Zalos grabbed €3.1 million for enterprise finance automation. Combined with Tallia’s round, 2026 funding in this niche totals roughly €35.6 million.
Founded in 2025 by childhood friends Jack Mander and Alexander Bartlam, Tallia pairs professional tax advisory experience with engineering know-how. The founders zeroed in on a thorny problem: how to apply generative AI to tax research without sacrificing accuracy, traceability, or professional judgment.
The company’s answer revolves around a retrieval system that tethers AI outputs to legislation, regulatory guidance, and case law. Advisers can verify every response before it lands in a client document. The platform also blends external tax knowledge with a firm’s proprietary documents, contracts, templates, and past work, so drafts mirror the organization’s established methods.
Senior professionals gain oversight through structured review workflows that expose the reasoning and evidence behind each AI-generated output. Tallia works inside Microsoft Word, Excel, PowerPoint, and Outlook. The company claims it produces a fully cited first draft in about 30 seconds and saves teams an average of five hours per fee earner each week.
Now, Tallia plans to widen adoption among tax and accounting firms, letting professionals offload repetitive research while keeping control over the advice they ultimately deliver.
