David Sze
Advisory Partner @ Greylock
San Francisco, United States
David Sze is a Series B investor at Greylock in San Francisco focused on Internet and Software. David Sze is based out of San Francisco, California and is the Advisory Partner of Greylock.David previously worked at Excite as a SVP of Product Strategy. David Sze attended the Yale University.
- Total investments:
- 41
- Last investment:
- Lead investor:
- 37%
Last updated:
For AI agents: llms.txt
Industries David Sze invests in
Stages David Sze invests in
Countries David Sze invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Series A
- $2.8M–$75M
- Series B
- $7.2M–$30M
- Series C
- $6.4M–$29M
Investment Focus
Industry
- Internet 7 (17%)
- Software 7 (17%)
- Social Media 4 (10%)
- Apps 2 (5%)
- Music 2 (5%)
Stage
- Series B 13 (32%)
- Series A 9 (22%)
- Series C 6 (15%)
- Series D 4 (10%)
- Funding Round 3 (7%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Lumi Story operates as an artificial intelligence company that helps people clear there barriers. | $4M / Seed / Jul 25, 2024 | ||
| Nextdoor is the app where you plug into the neighborhoods that matter to you. Our purpose is to cultivate a kinder world where everyone has a neighborhood they can rely on. Neighbors turn to Nextdoor daily to receive trusted information, give and get help, and build real-world connections with those nearby — neighbors, local businesses, and publicagencies.We believe connecting with others is a universal human need. That truth, and the reality that neighborhoods are among the most important communities in our lives, have been guiding principles for Nextdoor since the beginning.Today, neighbors rely on Nextdoor in 276,000 neighborhoods around the world, including the United States (nearly 1 in 3 U.S. households), the United Kingdom, Germany, France, the Netherlands, Italy, Spain, Sweden, Denmark, Australia, and Canada, with many more to come. Nextdoor is a privately held company based in San Francisco with backing from prominent investors including Benchmark, Shasta Ventures, Greylock Partners, Kleiner Perkins, Riverwood Capital, Bond, Axel Springer, Comcast Ventures, and others. | $18.6M / Post-IPO Equity / Jan 17, 2023 | ||
| Roblox is a platform for online gaming and entertainment that provides a communal digital experience that unites individuals via play. It enables anyone to imagine, create, and have fun with friends as they explore interactive 3D experiences produced by developers using their desktop design tool, Roblox Studio. | $150M / Series F / Jul 16, 2018 | ||
| Caavo is an entertainment obsessed hardware and software company. Our mission is to bring the art of TV viewing up to the level of today’s sophisticated audiences by uniting all of their entertainment into a single, elegant, voice controlled experience. Our products allow audiences to seamlessly move between linear TV, streaming services and webcontent, using voice or a single remote – to control it all. | $17.5M / Series B / Dec 19, 2017 | ||
| Caavo is an entertainment obsessed hardware and software company. Our mission is to bring the art of TV viewing up to the level of today’s sophisticated audiences by uniting all of their entertainment into a single, elegant, voice controlled experience. Our products allow audiences to seamlessly move between linear TV, streaming services and webcontent, using voice or a single remote – to control it all. | $15M / Series A / Feb 14, 2017 | ||
| Discord operates as a voice, video, and text communication service to talk and hang out with friends and communities. It was originally created for people who loved to play games, but these passionate people realized it could be enjoyed for more purposes. Discord is now used by everyone from local hiking clubs, to art communities, to study groups. | $50M / Series D / Jan 01, 2017 | ||
| Founded in 2014, by creator Alex Zhu and longtime friend, Luyu Yang, musical.ly is a video social network for creating, sharing and discovering short videos. Every day, millions of teens use musical.ly as an outlet to express themselves through singing, dancing, comedy, and lip-syncing. The app celebrates creativity with videos recorded in 15seconds or less that are shared across the musical.ly community. More than half of U.S. teens are users of musical.ly. Since first being made available in October 2014, musical.ly has hit #1 in the iOS App Store for free apps in 20 countries - including the United States.In 2017 Musical.ly was acquired by ByteDance subsidiary Toutiao, and in 2018 Musical.ly was merged into ByteDance subsidiary TikTok. | $100M / Series C / May 13, 2016 | ||
| PullString, Inc. is leading the field of computer conversation in both text and voice through a combination of design and technology. PullString (formerly ToyTalk) is an entertainment and technology company combining art and science to enable computer conversation with characters.The company's primary product, the PullString Platform, offersa professional authoring environment, hosted AI and machine learning runtime, and integrated conversation analytics to enterprises, agencies, and startups across verticals as diverse as entertainment, customer service, gaming and VR, travel, automotive, health and fitness, finance, human resources, and IoT.With direct support for all major conversational platforms like Facebook Messenger, Amazon Alexa, Skype, Slack, Kik, mobile, and web, the PullString Platform has been used to create award winning experiences like Call of Duty’s Lt Reyes on Messenger, Hello Barbie, and The Winston Show.PullString, founded as ToyTalk in 2011, has raised more than $44 million in funding from Greylock Partners; Charles River Ventures; Khosla Ventures; True Ventures; and First Round Capital. | $13.6M / Series D / Apr 14, 2016 | ||
| Discord operates as a voice, video, and text communication service to talk and hang out with friends and communities. It was originally created for people who loved to play games, but these passionate people realized it could be enjoyed for more purposes. Discord is now used by everyone from local hiking clubs, to art communities, to study groups. | $20M / Series C / Jan 26, 2016 | ||
| Medium is a social publishing platform that allows anyone to share ideas and perspectives that matter. For writers, Medium offers simple creation tools combined with a larger distribution network. For readers, Medium allows people to follow people and topics that matter to them and receive a personalized feed of content every day. Readers canjoin in the conversation by highlighting, recommending, or responding to posts. It was founded n 2013 and headquartered in San Francisco, California. | $57M / Series B / Sep 29, 2015 | ||
| See all 41 investments → | |||
Co-Investors
About Greylock
Greylock Partners invests in entrepreneurs that focus on consumer and enterprise software companies. The firm invests in companies that define new markets, including Airbnb, AppDynamics, Apptio, Arista Networks (NYSE: ANET), Cloudera, Docker, Dropbox, Facebook (Nasdaq: FB), LinkedIn (NYSE: LNKD), Medium, Nextdoor, Palo Alto Networks (NYSE: PANW),Pandora (NYSE: P), Pure Storage, and Workday (NYSE: WDAY).It was founded in 1965 and headquartered in Menlo Park, California.
Greylock Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Bill Kaiser
Partner
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David Wadhwani
Venture Partner
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Howard Cox
Special Limited Partner
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Jason Risch
Investor
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Mike Duboe
General Partner
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FAQ
What does David Sze invest in?
David Sze invests primarily in Internet, Software and Social Media startups, most often at Series B and Series A stage. Most of the 41 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What round sizes does David Sze invest in?
David Sze typically joins rounds of $2.8M–$75M at Series A, $7.2M–$30M at Series B and $6.4M–$29M at Series C. These are whole funding-round sizes, not David Sze's own check, which is rarely disclosed: the 10th–90th percentile of the confirmed public funding rounds David Sze took part in.
How do I contact David Sze?
Public channels for David Sze include LinkedIn, X (Twitter) and Facebook. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did David Sze last invest?
The most recent investment recorded for David Sze closed in Jul 2024. Shizune tracks 41 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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