Tallia Raises €4 Million to Bring AI Research into Tax and Accountancy Firms

London-based AI startup Tallia, formerly known as Revax, has raised €4 million in Seed funding to expand its AI-powered research and drafting platform for tax and accountancy professionals.

The round was co-led by Outward VC and the Institute of Chartered Accountants in England and Wales (ICAEW). Other participants included Portfolio Ventures, Expedite Capital, Paul Forster, Angus Miln and several angel investors.

Founded in 2025 by school friends Jack Mander and Alex Bartlam, Tallia is building AI tools for a profession where accuracy and accountability matter as much as speed.

Making AI more useful for tax professionals

Tax advisers regularly work through legislation, regulatory guidance, case law and internal client documents to produce recommendations. General-purpose AI tools can speed up research and drafting, but professionals still need to verify where answers come from and whether the information is reliable.

Tallia aims to address this gap with a platform designed specifically for tax and accountancy teams. Its technology connects AI-generated responses to relevant tax authorities, allowing advisers to review the supporting evidence before using it in client work.

The platform can also draw on a firm's internal documents, contracts, templates and previous work. This allows its responses to reflect the organisation's existing knowledge and working practices.

Another feature is its review process, which gives senior professionals the ability to examine the reasoning and evidence behind AI-generated work. The system integrates with familiar tools including Microsoft Word, Excel, PowerPoint and Outlook.

According to Tallia, the platform can produce a fully cited first draft in an average of 30 seconds, while teams save around five hours per fee earner each week.

Why this funding matters

Tallia's raise comes as AI adoption spreads across professional services, including accounting, tax and legal work. The opportunity is not simply to generate text faster, but to help specialists handle research-heavy tasks without losing the oversight and judgement their clients expect.

The company plans to use the new funding to expand adoption among tax and accountancy firms.

For founders building vertical AI products, Tallia offers an interesting example. Rather than competing directly with general-purpose AI assistants, it is targeting a specific professional workflow where specialist knowledge, traceable sources and approval processes are essential.

That focus could prove valuable in industries where customers need more than a convincing AI-generated answer. They need to know how it was reached and whether they can rely on it.

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Discussion question: Will specialist AI tools built for professions like accounting and law outperform general-purpose AI assistants in the long run?