Additive
AcquiredAI tools for tax professionals
San Francisco, United States · Founded 2023
- Headquarters
- San Francisco, California
- Employees
- 1–10
- Founded
- 2023
- Business Model
- B2B
- Website
- additive.ai
- Last Round
- SeedJan 2023
- Rounds
- 1
- Acquisition Date
- Sep 2025
About
Additive builds AI-powered tools that help tax professionals automate their most repetitive tasks, including K-1 tax document processing and return preparation. Founded in 2023 and headquartered in San Francisco, the company targets accountants and tax teams in the asset and wealth management industry. Additive was acquired by Thomson Reuters in September 2025.
Summary
Additive is a Manufacturing company based in San Francisco, United States, founded in 2023. Its most recent funding was a Seed round in Jan 2023. Investors include Mantis VC, Elad Gil and Byers Capital.
Tech & App Stack
4 technologies & apps tracked
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Funding & Exit History
Sep 2025
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Funding: Seed. Amounts, valuations, and investors where available.
Investors
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