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
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, Blake Byers and Elad Gil.
Tech & App Stack
4 technologies & apps tracked
Create a free account — 10 credits a month to unlock the full tech & app stack, funding history, and valuations.
Sign up to view the funding chart
Create a free account — you'll get 10 credits a month to unlock funding history, valuations, and tech stacks.
Funding History
Sep 2025
Sign up to see all 2 rounds
Full funding history, per-round amounts, and investor participation.
Investors
Similar Companies
Humanoid robotics company building general-purpose autonomous robots for commercial deployment
OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artifi...
Anthropic is an AI research company that builds reliable, interpretable, and steerable AI systems.
Citi is a leading global bank for institutions with cross-border needs, a global provider in weal...
xAI is an AI platform for accelerating human scientific discovery.
Waymo is an autonomous driving technology company with a mission to make it safe and easy for peo...