Additive AI, Inc.

Additive AI, Inc. specializes in advanced artificial intelligence solutions for tax data extraction, primarily serving accountants in the asset and wealth management sectors across the United States. Founded in 2023 and headquartered in San Francisco, US, Additive AI, Inc. focuses on automating tax data processing.

The company has conducted 2 deals, with its most recent deal taking place on September 16, 2025. It was formed as an independent entity, and information regarding the founder is currently not available. Additive specializes in advanced tax data extraction solutions tailored for accountants in the asset and wealth management sectors. The company's core product enables users to convert complex tax documents, such as K-1s, K-3s, and related forms, from PDF to Excel with remarkable speed and accuracy.

This purpose-built GenAI technology achieves over 99% accuracy in identifying characters of income and over 95% in extracting footnotes, even from intricate tables. Additive caters to a diverse client base, including top accounting firms, family offices, and private wealth management groups, illustrating its robust standing in the market. The service is utilized extensively across various geographical regions, particularly in the United States, where it supports compliance with state-specific forms, including those for California, New York, and Illinois. Additive's revenue model is primarily based on subscriptions and partnerships, allowing clients to access its innovative tax data extraction services.

Clients typically engage with Additive by subscribing to its platform, which provides comprehensive features for processing extensive tax documentation. This subscription model enables companies to streamline their tax return preparation, significantly reducing processing times from hours to minutes. The pricing structure may vary based on the level of service required, encompassing flagship offerings that highlight the company's advanced GenAI capabilities. Customers benefit from flexible options, including the ability to upload documents through the Additive web app or directly within Excel, enhancing their operational efficiency in tax accounting tasks.

In September 2025, Thomson Reuters Corporation acquired Additive AI, Inc. from Mantis and Quiet Capital. The acquisition enables Thomson Reuters Corporation to enhance its tax workflow automation capabilities. This strategic move is expected to bolster Additive's future growth, with plans to further develop its product offerings and enhance market penetration.