sieve

AI + human review to solve data cleaning - accessible via API or Excel

Y CombinatorSpring 2025ActiveB2BFinance and AccountingInvestingData EngineeringAPIs

What they do

Problem

Hedge funds and investment firms struggle to clean and validate financial data at scale because human review bottlenecks and manual processes slow their data pipelines.

Solution

An API (and Excel access) that uses AI agents plus expert human-in-the-loop review to clean, validate, and return high-quality financial data directly within existing pipelines.

Who it's for

Hedge funds and investment firms (and their data/engineering teams) that operate financial data pipelines.

Founders

Nicole Lu

Founder

Nicole is co-founder and CEO of sieve, which is solving data cleaning for hedge funds and investment firms. She previously worked at Citadel across Equity Quant Research, Global Trading, and Data Science groups, was a management consultant at McKinsey, and developed cancer detection algorithms at the Broad Institute.