Alexander Ratner

Co-Founder and CEO, Snorkel AI
Menlo Park, California,United States
Find Alexander Ratner's Email
Find Alexander Ratner's Phone

Who Is Alexander Ratner?

Total Experience20 years
CompanySnorkel AI
CountryUnited States

Alexander Ratner is a prominent figure in the field of Artificial Intelligence, recognized for his pioneering work in making machine learning more practical and systematic. He is an Assistant Professor at the University of Washington's Paul G. Allen School of Computer Science & Engineering and the co-founder and CEO of Snorkel AI. His research, which began during his Ph.D. at Stanford University, tackles the critical bottleneck of AI development: the creation and management of training data. He is the creator of the Snorkel project, which introduced the paradigm of weak supervision, allowing developers to programmatically label data instead of relying on manual, time-consuming labeling. This data-centric approach to AI has had a profound impact on both academia and industry, enabling organizations to build and deploy complex AI applications more efficiently and effectively.

How Did Alexander Ratner's Career Path Shape Their Journey?

Alexander Ratner's work history includes a series of influential roles in various companies. Here is a detailed list of his professional journey:

Snorkel AI - Co-Founder and CEO(2019 to Present)
University of Washington - Affiliate Assistant Professor(2019 to Present)
Stanford University - PhD Student(2014 to 2019)
SiftPage - Co-Founder and CEO(2013 to 2014)
3LP - Analyst(2011 to 2012)
Konarka Technologies - Physics Group Intern(2010 to 2010)

What Are Alexander Ratner's Key Achievements?

Co-founder & CEO of Snorkel AI

Co-founded Snorkel AI, a venture-backed company that originated from his Stanford research project. The company provides an end-to-end platform for data-centric AI development, helping major enterprises accelerate the creation of AI applications using programmatic data labeling.

Creator of the Open-Source Snorkel Project

Led the development of Snorkel, an influential open-source project from the Stanford AI Lab. Snorkel introduced the concept of weak supervision to programmatically build training datasets, a paradigm shift from traditional hand-labeling.

Assistant Professor at University of Washington

Holds a faculty position at the prestigious Paul G. Allen School of Computer Science & Engineering, where he leads research on data-centric AI and the foundational principles of modern machine learning systems.

Influential Research and Publications

Authored numerous highly-cited papers in top-tier machine learning and data management conferences like NeurIPS, ICML, and VLDB. His work on data-centric AI has significantly influenced the direction of ML research and practice.

Ph.D. in Computer Science from Stanford University

Earned his doctorate from Stanford, advised by Christopher Ré. His thesis laid the theoretical and practical groundwork for the Snorkel project and the principles of weak supervision that power data-centric AI.

What's Alexander Ratner's Educational Background?

Doctor of Philosophy (PhD), Computer Science

Stanford University - Year 2014

A.B., Honors Physics

Harvard College - Year 2007

Degree Program

The Lawrenceville School - Year 2003

Buying Intent Signals for Alexander Ratner

Highperformr Signals uncover buying intent and give you clear insights to target the right people at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance

Company Overview

Snorkel AI
Total employees223
HeadquartersRedwood City
Founded2019

Snorkel AI is a technology company focused on data-centric AI development. Its flagship platform, Snorkel Flow, enables enterprises and data science teams to accelerate the creation of AI applications by programmatically labeling, building, and managing training data. By replacing the manual and time-consuming process of hand-labeling data, Snorkel helps organizations build and deploy more robust and adaptable machine learning models faster.

Snorkel AI Funding Information
Unknown - Total Funding Raised
$85M - Most recent funding amount
4 - Number of funding rounds
9 Aug, 2021 - Latest funding round
Lead Investors:
Greylock Partners
Addition
BlackRock
Lightspeed Venture Partners
GV
In-Q-Tel

Highperformr's free tools for company research

Find contact info

Get verified emails, phone numbers, and LinkedIn profile details

Find similar contacts

Discover contacts with similar roles, seniority, or companies

Perform deep contact research

Uncover insights like skills, work history, social links, and more

Discover, research and enrich contacts with Highperformr — Smarter, Faster

Explore contacts in-depth — from verified emails and phone numbers to LinkedIn activity, job changes, and more — all in one powerful view.

Highperformr AI helps you surface the right people and enrich your CRM with live, accurate contact insights so your teams can connect faster and close smarter.

  • Track signals like job change, promotion, and LinkedIn activity
  • Enrich contacts with verified email, phone, and social data instantly
  • Automate enrichment and updates with powerful workflows
  • Sync enriched contact info directly into your CRM and tools

Thousands of contacts — including decision-makers, influencers, and ICP matches — are just a search away.

Thousands of companies, including, are just a search away.