Geoff Ralston is the President and Partner at Y Combinator, based in United States, North America. With a background in Financial Services, Geoff Ralston has a rich history of leadership and innovation. Geoff Ralston studied MS  Computer Science and Electrical Engineering @ Stanford University. Explore their detailed professional journey, key connections, and contributions to the industry on our platform.

Mint is an extensible, self-hosted web site analytics program. Its interface is an exercise in simplicity. Visits, referrers, popular pages and searches can all be taken in at a glance on Mint's flexible dashboard.

Mint

Imeem is an online music service that gives fans instant access to almost any song they want, for free.

Imeem

[Xoopit](https://www.xoopit.com/) is an email organizational tool.  Xoopit has invented an email and web indexing architecture similar to a web search engine to help its users retrieve meaningful content from their archived email.  

Xoopit features: 
 - email content search
 - add links, maps, etc. from the web  to a mail being composed 
 - exposes information about all senders on a thread: profile pics, recent conversations and attachments and media they've sent. 
testing

Xoopit

Humanoid is the world's first human brainpower API.

Humanoid offers computer programmers a reliable way to use human intelligence in software applications. Using a drag-and-drop interface, engineers can swiftly create tasks and send instructions to humans.

Proprietary software breaks the tasks into small pieces and routes them to workers across the globe. Meanwhile, Humanoidâ€™s artificially intelligent workforce manager ensures accuracy and prevents fraud without human oversight. 

When the task is complete, developers receive the resulting data through a simple programming interface, known as an API.

Humanoid

Mailgun provides a web service for integrating email inboxes into apps. 

Just as Twilio enables developers to build voice and SMS into their apps, Mailgun enables developers to tightly integrate email into their apps, i.e. give real email mailboxes to their users, their web pages or any objects in their apps.

Such tight email integration enables functionality like private user mailboxes, photo uploads from cell phones, email-driven comments, discussion groups and more.

Mailgun

Earbits provides 100% commercial-free, online radio, with no listener subscription fees. Choose from over 400 stations of music, hand picked and curated by a team of music editors. Available worldwide on the web and on Android.

Earbits

AeroFS is an enterprise file sync and share solution. It changes the way creative agencies, consultants, freelancers, and work teams collaborate with their co-workers and clients. The company’s flagship collaboration platform, Amium, makes sharing information and ideas more intuitive and efficient, and dramatically improves and simplifies collaboration with users outside the organization.

The service, which stores files in a private cloud-like platform, stores data on the devices designated by the client. AeroFS desktop and server software can run entirely behind a firewall, including authentication. Their vision is to redefine the current view of the ‘cloud’ with better controls, privacy and scalability, whether for administrators, end-users or anyone else. 

AeroFS

Tutorspree is an online platform that offers web based tuition services for the U.S students on various subjects. It provides tutoring services in the fields of math, social studies, language, science, programming, and English.


Tutorspree solves the discovery, matching, scheduling, and payment inefficiencies in a $7B domestic market by combining its deep and growing roster of over 5000 active tutors with technology that creates ideal unions between students and tutors.


Tutorspree was established in 2010 and is based in New York, N.Y.

Tutorspree

Filestack is a Content Ingestion Network - seamlessly integrating edge content within an applications cloud - reliably, scalably and securely. It is the #1 file uploading tool in the world. Developers love Filestack because of its third party integrations, easy to use API, and ability to upload, transform and deliver documents, images, videos and more.

Filestack

URX empowers publishers to monetize mobile content and enables advertisers to drive mobile commerce. The world's most forward-thinking companies use URX to connect users directly to relevant commerce experiences.

Nervana focuses on building technology to power the next generation of intelligent applications. Founded by experts in machine learning, neuroscience, processor architecture, and chip design, Nervana Systems is bringing unprecedented scale and simplicity to the application of brain-inspired algorithms. 

It was founded in 2014 and headquartered in San Diego, California.

Nervana

Geoff Ralston

San Francisco, California, United States, North America

Annouced Date	Organization Name	Funding Round	Money Raised
Nov 16, 2016	Miso	Seed Round - Miso	2.6M
Mar 21, 2017	Dost Education	Seed Round - Dost Education	0
Nov 06, 2019	Elpha	Seed Round - Elpha	1.1M
Sep 21, 2023	Rain Industries	Seed Round - Rain Industries	9.7M

Annouced Date	Organization Name	Funding Round	Investor Name	Money Raised
Feb 23, 2017	Shield Bio	Seed Round - Shield Bio	Y Combinator	4.1M
Oct 09, 2017	Oolu	Series A - Oolu	Y Combinator	3.2M
May 23, 2018	Shield Bio	Series A - Shield Bio	Y Combinator	8.0M
Aug 01, 2018	Next Tech	Seed Round - Next Tech	Imagine K12	1.1M

Geoff Ralston

President and Partner

Founded

Investment

Lead investment

Exits

Employees

Industry

Geoff Ralston has made 27 investments. Their Latest investment was Seed Round - Rain Industries on Sep 21, 2023

Number of investment

Number of exits