Fondo · Feb 2026
Launch recap highlighting the product’s human-reviewed extraction, Excel integration, and early performance claims.
AI + human review to solve data cleaning - accessible via API or Excel
Company research
Public company, workplace, funding, and market signals
Updated Jul 30, 2026
Overview
sieve is a New York-based, Y Combinator-backed AI data extraction and cleaning platform for hedge funds and investment firms. It combines AI-led extraction with human review to turn websites, PDFs, filings, images, and other messy sources into analysis-ready data, delivered through an API and Excel add-in.
Primary product
AI + human-in-the-loop data extraction and cleaning platform with API and Excel add-in
Founded
2025
Headquarters
New York, New York, United States
Team size
1-10
Industry
Technology, Information and Internet
Sub-industry
AI data extraction / data cleaning
Business model
usage-based API
pay-as-you-go
subscription
enterprise subscription
Funding
Stage
pre-seed
Total raised
$500K
Latest round
Pre-Seed · Jul 2025
Latest amount
$500K
Jul 2025 · Y Combinator
People & investors
Work & culture
Public materials emphasize mission-driven, accuracy-focused work for investors and engineers; no detailed employee culture program is publicly listed.
Product & market
Pricing
Starter pay-as-you-go plus enterprise subscription/custom plans; pricing is usage-based for many APIs and the Excel add-in requires a subscription.
Differentiators
- —AI-led extraction with expert human review
- —consensus validation for quality control
- —built for financial/investment-grade use cases
- —delivers structured data directly into existing workflows
- —Excel add-in for non-code users
- —supports websites, PDFs, filings, images, and local files
- —traceability back to source documents
- —positioned as cheaper and faster than manual review/BPO
Technology
AI-led extraction
human-in-the-loop review
consensus validation
API
Excel add-in
web scraping
document processing
website monitoring
SEC filing extraction
data traceability
Customers
hedge funds
investment firms
quantitative researchers
commodity-focused investors
ESG investors
enterprise data teams at international banks
trading and investment teams
Competitors
manual spreadsheet workflows
in-house data cleaning and QA
BPO/manual outsourcing
generic AI-only extraction tools
alternative data vendors
Scale & contact
Latest news
LinkedIn · Dec 2025
Nicole Lu announced the public alpha for the Excel add-in, noting free usage and inviting feedback from investing and data-heavy users.
HireTop · Jun 2025
Startup profile recap of sieve’s finance-focused product, API and Excel workflow, and early traction/market positioning.
Y Combinator · May 2025
Official YC launch describing sieve’s AI + human review workflow, financial-data focus, and Excel/API delivery.
Jobs and careers at sieve
13 jobs at sieve
Growth Operations Lead
On-site
Product
San Francisco; San Francisco, California, United States
3d ago
On-site
Full-time
Business Operations
On-site
Business Operations
San Francisco; San Francisco, California, United States
5d ago
On-site
Full-time
Business Development
On-site
GTM
San Francisco; San Francisco, California, United States
2w ago
On-site
Full-time
Growth Associate
Remote
Business Operations
India
1mo ago
Remote
Contract
Member of Technical Staff, Machine Learning
On-site
Engineering
San Francisco
2mo ago
On-site
Full-time
Member of Technical Staff, Forward Deployed
On-site
Engineering
San Francisco
4mo ago
On-site
Full-time
Data Operations Lead
On-site
Operations
San Francisco
6mo ago
On-site
Full-time
Reliability Engineer
On-site
Engineering
San Francisco
7mo ago
On-site
Full-time
Product Engineer
On-site
Engineering
San Francisco
7mo ago
On-site
Full-time
Product & Ops Lead
On-site
Operations
San Francisco
12mo ago
On-site
Full-time
Software Engineer
On-site
Engineering
San Francisco
1y ago
On-site
Full-time
Applied Research Engineer
On-site
Engineering
San Francisco
1y ago
On-site
Full-time
Distributed Systems Engineer
On-site
Engineering
San Francisco
1y ago
On-site
Full-time