Additive AI is a San Francisco-based software company founded in 2023 that uses generative AI to automate extraction and processing of complex tax documents, particularly Schedule K-1 and K-3 forms, f
Additive AI is a San Francisco-based software company founded in 2023 that uses generative AI to automate extraction and processing of complex tax documents, particularly Schedule K-1 and K-3 forms, for accounting professionals specializing in pass-through entity taxation. The platform claims accuracy rates exceeding 99% on income character extraction and 95% on complex footnotes. In September 2025, Thomson Reuters Corporation announced its acquisition of Additive AI, integrating the startup into Thomson Reuters' Tax and Accounting Professionals division.
Total raised
$6.0M
Last stage
Seed
Investors
Dwight Crow
Previously founded Whisper.ai, an AI company focused on medical device applications that was sold and recognized as one of Forbes' 50 Best AI Companies in 2021. Prior to that, co-founded Carsabi.com and worked as a software engineer at Arista Networks. Served as President of the Berkeley Computer Science Undergraduate Association and Finance Officer for the University Students Cooperative Association.
Elizabeth Beastrom
Quoted in the Thomson Reuters acquisition announcement of Additive AI in September 2025, articulating the strategic rationale for the acquisition.
Aaron Taylor
Previously Senior Director of Software Engineering at Salesforce, where he architected all generative AI products within Salesforce Industries and oversaw integration of Diffeo (acquired by Salesforce in 2019). Co-founded Diffeo, a machine learning and information retrieval company acquired by Salesforce. Also co-founded Meta Search (acquired by Diffeo) and Peck, a social calendaring app that was a finalist in the Williams College Business Plan Competition. Expertise in Go, Python, Swift, Ruby, Java, C/C++, distributed systems, ML, NLP, and information retrieval.
Matt Bradvica
Represented RSM in the November 2024 strategic partnership announcement with Additive AI, emphasizing integration of advanced AI into RSM's tax workflows.
Venky Iyer
Nine years of software development experience. Early Facebook employee (joined 2008), led the entities team using ML to power Facebook's profiles and Likes system. Subsequently served as engineering leader at a financial exploration company, directing 20+ ML and automation engineers. Expertise in full-stack development, ML systems, backend infrastructure, and data engineering.
Pete Toporzycki
Previously Senior Product Manager at PwC. Managed more than 100 diligence projects and 20 structuring initiatives within PwC's Mergers and Acquisitions group. Also held positions within PwC's Products & Technology Group.
No applications, no recruiter spam. Just the intro.
A few questions to make sure this role is the right shape for you. Two minutes.
I write the intro, send it to the founder, and handle the back-and-forth.
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.