ABOUT
Founding
March 2024
Headquarters
San Francisco, CA
Stage
Series B
Employees
31
Total Funding
Notable Investors
OpenAI, General Catalyst, Menlo Ventures, Oak HC/FT, Neo
CORE METRICS
Amount
Date
Chai-1 GitHub Stars
1.9K
April 2026
Chai-2 Hit Rate
50%
June 2025
Valuation
$1.3 billion
December 2025
ADDRESSABLE MARKET
Estimated Size
Year of Estimate
Global market for monoclonal antibody therapeutics
$288 billion
2024
Monoclonal antibodies that received FDA approval
159
2025
Percentage of newly approved drugs that were antibody therapies
23%
2025
