Geoff Ralston

Geoff Ralston was a founder of Four11, where he built RocketMail, one of the first web mail services, which in 1997 became Yahoo Mail. At Yahoo Geoff worked in engineering, then ran a business unit, then became Chief Product Officer. After Yahoo he was CEO of Lala, which was acquired in 2009 by Apple. He cofounded Imagine K12, the first Ed Tech accelerator, which funded companies like ClassDojo and Remind, and merged with YC in 2016. He has an AB in Computer Science from Dartmouth, an MS in Computer Science from Stanford, and an MBA from INSEAD.


Hacking DNA: The Story of CRISPR, Ken Thompson, and the Gene Drive

Before CRISPR, genetic engineering was slow, expensive, and inaccurate. With CRISPR, genome editing is cheap, accurate, and repeatable. This is the story of CRISPR, concluding with a discussion of Gene Drive, a biological technique which, when used with CRISPR, gives even greater power to genetic engineers.

Transparency in Startup Investing

Geoff Ralston, Y Combinator Partner, on increasing transparency in startup investing.

A Guide to Demo Day Presentations

Geoff Ralston on preparing for and pitching at Demo Day.

IK12 + YC

We are excited to announce that Imagine K12, the original edtech accelerator, is joining Y Combinator to form an edtech vertical within YC.  We founded Imagine K12 in…

A Guide to Seed Fundraising

Why Raise Money – When to Raise Money – How Much to Raise? – Financing Options – Convertible Debt – Safe – Equity – Valuation – Investors Crowdfunding…

A Guide to Seed Fundraising

  Contents: Why Raise Money When to Raise Money How Much to Raise? Financing Options Convertible Debt Safe Equity Valuation Investors Crowdfunding Meeting Investors Closing the Deal Negotiations Documents You…

On the Shred Video Lawsuit

Once it wasn’t uncommon for large tech companies to bully smaller companies into submission or death. Microsoft was an infamous offender, but they certainly were not alone. One…

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