The company invests in early- and growth-stage technology companies and was founded to support visionaries in building impactful and enduring businesses.

Addition, L.P.'s terms govern use of its website and are effective February 1st, 2023.

Snorkel AI raises a $350 million Series E at a $3.5 billion valuation, nearly tripling its $1.3 billion Series D valuation from 17 months earlier. Insight Partners and S32 lead the round, with Addition, Lightspeed, Greylock, GV, and Wells Fargo also participating. The company sells complete training datasets and simulated environments using software, synthetic data, and subject matter experts, and reports a $375 million annualized revenue run rate, up eighteenfold in 12 months.

Sep 2026TechCrunchNews article

Base Power raises $1 billion in a Series D at a $13 billion post-money valuation to expand its network of backyard batteries. It has installed more than 500 megawatt-hours of storage and is deploying about 100 batteries daily, while introducing Base Core, a 39.2-kilowatt-hour home battery built in Austin. The company operates in Texas and Illinois, offers batteries by subscription, and sells stored electricity to the grid during periods of high demand.

Aug 2026TechCrunchNews article

Cloud platform startup Render raises a $50 million Series B led by Bessemer Venture Partners. Existing investors General Catalyst, South Park Common Fund, and Addition also participate, bringing Render’s total funding to $77.5 million. The company says it will use the funding to expand its platform for larger engineering teams and improve its workflow and tooling; customers include Watershed and Red Bull.

Jun 2023TechCrunchNews article

Adept raises $350 million in a Series B round co-led by General Catalyst and Spark Capital, bringing its total funding to $415 million. CEO and co-founder David Luan says the money will support productization, model training, and headcount growth. The company is developing ACT-1, an AI assistant that turns natural-language instructions into actions across existing software and APIs; its prototype can import LinkedIn URLs into recruiting software.

Mar 2023TechCrunchNews article