Additive
Acquired
AI tools for tax professionals
- Headquarters
- San Francisco, California
- Employees
- 1–10
- Founded
- 2023
- Business Model
- B2B
- Website
- additive.ai
- Last Round
- SeedJan 2023
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.
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