Companies funded by Greylock
Early-stage venture firm with a strong enterprise and AI footprint.
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Ranked by current headcount across companies in Greylock's disclosed portfolio. Refreshed monthly.
- 1Instagram
More than one billion people around the world use Instagram, and we’re proud to be bringing them closer to the people and things they love. Instagram inspires people to see the world differently, discover new interests, and express themselves.Since launching in 2010, our community has grown at a rapid pace. Our teams are growing fast, too, and we’re looking for talent across engineering, product management, design, research, analytics, technical program management, operations, and more. In addition to our headquarters in Menlo Park, we have thriving offices in New York City and San Francisco where teams are doing impactful work every day.
- Series B
- 61k employees
- Founded 2010
- 2ServiceNow· Santa Clara, California, United States
ServiceNow (NYSE: NOW) makes the world work better for everyone. Our cloud-based platform and solutions help digitize and unify organizations so that they can find smarter, faster, better ways to make work flow. So employees and customers can be more connected, more innovative, and more agile. And we can all create the future we imagine. The world works with ServiceNow. For more information, visit www.servicenow.com.
- Post-IPO debt
- 35k employees
- Founded 2004
- 3Staples· Framingham, Massachusetts, United States
For nearly 40 years, Staples has been a trusted leader in delivering end-to-end workplace solutions for consumers and businesses of all sizes across a broad range of industries. The company provides a comprehensive portfolio of products, strategic solutions, and services including print and marketing, shipping, technology, and travel. Its specialized assortment includes high-quality office supplies, janitorial products, technology, furniture, and breakroom essentials, all supported by best-in-class supply chain capabilities and a dedicated team of experts committed to making the workday easier. Headquartered near Boston, Massachusetts, Staples operates throughout North America via direct B2B sales, e-commerce, and more than 900 retail stores. To learn more, visit your local U.S. Staples store, download the Staples app, explore Staples.com or StaplesBusiness.com, or follow @Staples on social media.
- Grant
- 29.7k employees
- Founded 1986
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- 4Workday· Pleasanton, California, United States
By unifying HR and Finance on an open, trusted platform powered by AI, Workday delivers high-impact outcomes our customers can count on. At the heart of our platform is Sana from Workday—the superintelligence that puts AI agents to work for you and your people. Welcome to a new work day.
- Post-IPO equity
- 25.2k employees
- Founded 2005
- 5LinkedIn· Sunnyvale, California, United States
Founded in 2003, LinkedIn connects the world's professionals to make them more productive and successful. With more than 1 billion members worldwide, including executives from every Fortune 500 company, LinkedIn is the world's largest professional network. The company has a diversified business model with revenue coming from Talent Solutions, Marketing Solutions, Sales Solutions and Premium Subscriptions products. Headquartered in Silicon Valley, LinkedIn has offices across the globe.
- Private equity
- 23.7k employees
- Founded 2003
Find engineers and founders in Greylock’s portfolio
Greylock’s portfolio is a curated bet on the next wave of category-defining companies. The list above ranks Greylock-backed companies by current headcount, drawn from public LinkedIn and Crunchbase records. With 351 matching companies in Refolk’s index, the depth of senior engineers, founders, and operators is significant.
Greylock’s companies tend to share a profile - strong technical founders, fresh capital, and access to the Greylock network. Hiring from these companies often means hiring from one of the most curated talent pools in tech.
Refolk turns this list into a search. Ask for “Greylock portfolio companies hiring senior ML engineers” or “founders of Greylock-backed companies who left in the last year” and Refolk returns a fresh ranked shortlist.
How this list is built
Last refreshed: Thu, 17 Sep 2026 15:10:26 GMT
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Browse other investors
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Common questions
How is this ranking built?
The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.
How fresh is the data?
The underlying index updates continuously and this ranking is rebuilt monthly. Last refreshed: Thu, 17 Sep 2026 15:10:26 GMT. For a list built against the index as it stands today, sign up and run the search live.
Can I get the full list of 351 companies?
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Ranked, with the reasoning under every name. Open a profile, ask a follow-up, narrow it down.
- Staff backend engineers in NYC who shipped Rust in production
- Series A fintechs in SF under 50 people, growing headcount this year
- Maintainers of fast-growing Rust web frameworks on GitHub
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