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aVenture is an AI-native agentic deep research tool for researching and finding companies and people, and is a high-quality alternative to AlphaSense, CB Insights, Crunchbase, Dealroom, Harmonic, Owler, Perplexity Finance, PitchBook, Preqin, PrivCo, Synaptic, and Tracxn.

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aVenture Investment Company ("aVenture") is an independent research platform providing detailed analysis and data on startups, venture capital investments, and key industry individuals. It is not a registered investment adviser, broker-dealer, or investment advisor and does not provide investment advice or recommendations. The data provided by aVenture does not constitute recommendations or advice, whether by methodology, analysis, AI-generated content, or a statement written by a staff member of aVenture.

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Library

sieve

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

: New York, NY, USUnited States
: Y Combinator X25

sieve Website, Blog & Press Pages - aVenture Research

Library

usesieve.comCrawled Oct 14, 2026

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Product

3 pages

Know when a competitor changes a price/monitoring/competitor-pricing
The service monitors selected competitor PDPs, marketplace listings, and dealer pages, and emails daily when prices, Buy Box status, or stock status changes.
Know when a competitor changes their website/monitoring/competitor-websites
The service monitors selected competitor pages, including pricing, product, changelog, and careers pages, and emails daily when numbers or wording change.
Know when a competitor ships a feature/monitoring/competitor-product-launches
The service monitors selected changelogs, pricing pages, and docs, and emails daily when features move from beta to GA or packaging changes.

Blog

6 pages

Blog/blog
Teams use sieve to extract and validate data from public records, websites, regulatory filings, research publications, and PDFs. The page shares AI-powered extraction practices, automation strategies, and team examples.
Building global traffic datasets from fragmented port records/blog/building-global-traffic-datasets-fragmented-port-records
sieve helps hedge funds build trade datasets by sourcing, extracting, and normalizing fragmented data across formats, languages, and source structures.
If you rent an apartment in NYC, one 30-second search could be worth thousands of dollars./blog/nyc-rent-stabilized-map
The page maps NYC buildings that may contain rent-stabilized apartments, which landlords may not identify as rent stabilized.
If you're looking to eat healthy in NYC, you should head to your local doughnut shop/blog/restaurant-health-inspections-map
The page maps restaurant health inspections across NYC, Chicago, and LA, noting that doughnut shops top NYC, some Michelin spots rank below Burger King, and Chicago conducts few inspections on weekends.

About

1 page

About/about
The Y Combinator-backed startup is building AI-powered data quality agents and data extraction and validation workflows. Its team is described as ex-MIT and ex-Citadel.

Contact

1 page

Contact/contact
sieve offers an AI-powered data validation platform, personalized demos, and free consultations about data workflows and extraction needs.

Homepage

1 page

Homepage/
Turn websites, PDFs, filings, and other unstructured sources into accurate, ready-to-use data with AI extraction and expert validation.