Adsum Employee Directory
Financial ServicesEngland, United Kingdom11-50 Employees
Adsum is a financial services company headquartered in London, United Kingdom, located at 1 Lyric Square, London, England W6 0NB, and it employs 11-50 people. It develops AI agents that run core accounting workflows for UK practices. Its OpenTax product serves as an orchestration layer across existing technology stacks, automating data validation, input checks, reconciliations, and period-end close while providing a consistent methodology across entities. Adsum serves accounting firms of all sizes across the UK, helping them scale without adding headcount, and its technology is trusted by more than 1,000 practices. Recent news coverage indicates financing activity and VAT facility-related initiatives, as well as product developments such as the Instant VAT Refund service.
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