Joseph Horowitz
Managing General Partner @ Icon Ventures
Palo Alto, United States
Joseph Horowitz is a Series C investor at Icon Ventures in Palo Alto focused on Mobile and Security. Joe Horowitz, Managing General Partner, was instrumental in securing capital from Jafco Co., Ltd. in 2003 to launch the firm that has become Icon Ventures today, bringing at the time 25 years of experience working with early-stage companies. Joe is passionate about the value-creation process and loves spending time with talented entrepreneurs.Joe’s venture capital experience prior to Icon includes a 10-year tenure at U.S. Venture Partners (USVP) from 1982 to 1992 and three years with Exxon Enterprises. At USVP, the first deal that he worked on was the seed financing of Sun Microsystems. In addition to being a General Partner, Joe was a member of USVP’s executive committee. Joe also spent several years successfully building his own venture investment and advisory firm, and then gained valuable operating experience as Chairman & CEO of Geocast Network Systems, a broadband infrastructure company backed by Mayfield, Kleiner Perkins Caufield & Byers and Institutional Venture Partners.At Icon, Joe is on the Board of or actively involved with Area 1 Security, Devicescape, KIXEYE, Moovweb, PlayStudios, RedSeal, Sencha, Synack, TuneIn and Zephyr Health. Prior Icon investments include Aster Data Systems (Teradata), Clicker (CBS), Cortina Systems (Inphi), FireEye (FEYE), Infinera (INFN), Meebo (Google), Mimosa Systems (Iron Mountain), Ocarina Networks (Dell), Oodle (QVC), Palo Alto Networks (PANW), Posterous (Twitter), Proofpoint (PFPT), SiTime (MegaChips) and true[X]media (Fox).Joe’s past investments include Avia Group International (Reebok), Encompass (Yahoo!), Gymboree (GYMB), Imedia (Terayon), Micro Linear (MLIN), Microtune (TUNE), Netsys Technologies (Cisco), Pacific Microsonics (Microsoft), Ross Stores (ROST), Starsight Telecast (Gemstar), Stream Machine (Cirrus Logic) and Sun Microsystems (SUNW).Joe received his MBA from the Wharton Graduate School of Business. As an undergraduate he studied engineering and applied sciences and then earned his Bachelor of Arts degree in economics at Columbia University.
- Total investments:
- 25
- Last investment:
- Lead investor:
- 24%
Last updated:
For AI agents: llms.txt
Industries Joseph Horowitz invests in
Stages Joseph Horowitz invests in
Countries Joseph Horowitz invests in
Contacts
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Investment Focus
Industry
- Mobile 4 (16%)
- Security 3 (12%)
- Software 3 (12%)
- Manufacturing 3 (12%)
- Cyber Security 3 (12%)
Stage
- Series C 7 (28%)
- Series B 6 (24%)
- Series D 3 (12%)
- Funding Round 3 (12%)
- Series F 2 (8%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Global Worldwide is a global leaders in Agriculture, Materials Science, Genetic Engineering, Election Management Systems, and Pharmaceutical Testing.. Each division of the company has led its respective industry through productive, science-based innovation to meet the needs of customers and help solve global challenges. | $5M / May 07, 2025 | ||
| Volansi is a developer of logistics solutions with autonomous aerial delivery to facilitate time-critical shipments over long ranges. The company builds and operates long-range, high-payload unmanned aerial systems for various applications, such as the delivery of spare parts and medical supplies. Its drones offer delivery on fixed routes forcustomers who have a particular pain point around time and costs that enable businesses to deliver goods in less time possible.Volansi was co-founded by Hannan Parvizian and Wesley Zheng in 2015 and it is headquartered in Concord, California. | $50M / Series B / Sep 15, 2020 | ||
| Based in Redwood City, CA, Area 1 Security is developing a product focused on eliminating targeted, socially engineered cyber attacks. Founded by security experts from NSA and MIT, and data analytics specialists from NSA and Disney, the stealth mode startup has raised $25.5 million in total funding to date. Investors include Icon Ventures, KleinerPerkins Caufield & Byers, Allegis Capital, Cowboy Ventures; Data Collective (DCVC); First Round Capital; RedSeal Networks CEO and former Venrock partner Ray Rothrock; and Shape Security CEO Derek Smith. | $25M / Series B / Jun 29, 2020 | ||
| Based in Redwood City, CA, Area 1 Security is developing a product focused on eliminating targeted, socially engineered cyber attacks. Founded by security experts from NSA and MIT, and data analytics specialists from NSA and Disney, the stealth mode startup has raised $25.5 million in total funding to date. Investors include Icon Ventures, KleinerPerkins Caufield & Byers, Allegis Capital, Cowboy Ventures; Data Collective (DCVC); First Round Capital; RedSeal Networks CEO and former Venrock partner Ray Rothrock; and Shape Security CEO Derek Smith. | $32M / Series A / Oct 23, 2018 | ||
| Founded in 2007, KIXEYE (formerly Casual Collective) is an independent game developer that makes games for gamers by gamers. Responsible for popular titles like Desktop Defender, Backyard Monsters, Battle Pirates and War Commander. KIXEYE is the first to deliver proper game play experiences on social networks. The company is based in SanFrancisco and backed by Trinity Ventures and Lightspeed Venture Partners. | $20M / Series D / Mar 09, 2018 | ||
| Synack is a crowdsourced security platform that protects organizations with unparalleled ethical hacker talent and proprietary scanning technology. More than 1,500 of the world’s best security researchers from 82 countries are part of the Synack Red Team community that hunts for critical vulnerabilities. Their smarts combined with Synack’s powerfulsoftware safeguards leading global banks, federal agencies, DoD sensitive assets, and close to $1 trillion in Global 2000 revenue.The company was started in 2013 and is headquartered in Redwood City, California. | $21.3M / Series C / Apr 11, 2017 | ||
| Thanx, Inc. (www.thanx.com) is a guest engagement platform for offline businesses. Brick-and-mortar retailers, restaurants, and malls are facing an unprecedented crisis in the aftermath of COVID-19; Thanx helps these businesses embrace digital purchasing, capture greater customer data, and take action on that information to personalize everyinteraction with their guests. Thanx’s proprietary integrations with credit card networks (e.g. Visa) provide the volume and accuracy of purchase data which sits at the core of our CRM and Marketing Automation suite of tools. Thanx was founded in 2011 and is headquartered in San Francisco, CA. | $17.1M / Series B / Dec 08, 2016 | ||
| From live sports & local radio to news, music & podcasts, TuneIn has the perfect thing to “hear” wherever “here” might be.With 75 million monthly active users, TuneIn is one of the most widely used streaming audio platforms in the world. TuneIn broadcasts over 100,000 owned & operated and partner radio stations, in addition toboasting more than 5.7 million podcasts. TuneIn Premium subscribers unlock exclusive access to live commercial-free news from top networks like CNBC, CNN, FOX News Radio and MSNBC, commercial-free music channels for every mood and activity, and less ads throughout the platform. TuneIn can be accessed in 197 countries and on more than 200 different major platforms and connected devices, including voice assistants like Siri, Alexa, Google Assistant, Samsung Bixby and Cortana, and key integrations with Sonos, Bose and Tesla. With venture funding from Sequoia Capital, Comcast Ventures, IVP, Innovation Endeavors, Causeway, General Catalyst Partners, Icon Ventures and Marker LLC, TuneIn is headquartered in San Francisco, California. We are currently working and hiring remotely across the United States, as well as in parts of Europe and South America. Come join us in reinventing radio for a connected world! | $50M / Series F / Dec 15, 2015 | ||
| Based in Redwood City, CA, Area 1 Security is developing a product focused on eliminating targeted, socially engineered cyber attacks. Founded by security experts from NSA and MIT, and data analytics specialists from NSA and Disney, the stealth mode startup has raised $25.5 million in total funding to date. Investors include Icon Ventures, KleinerPerkins Caufield & Byers, Allegis Capital, Cowboy Ventures; Data Collective (DCVC); First Round Capital; RedSeal Networks CEO and former Venrock partner Ray Rothrock; and Shape Security CEO Derek Smith. | $15M / Series A / Oct 14, 2015 | ||
| Zephyr Health operates as an insights-as-a-service solution built specifically for life sciences companies addressing critical business and patient needs. Zephyr Illuminate™ helps pharmaceutical, biotechnology, and medical device companies make confident decisions faster across the entire lifecycle with precise and predictive data insights. | $17.5M / Series C / Aug 19, 2015 | ||
| See all 25 investments → | |||
Co-Investors
About Icon Ventures
Based in Palo Alto, CA, Icon Ventures is a specialty venture capital firm focused on leading Series B or C financings. With over $780 million under management, Icon invests with the world’s leading venture firms in companies that are category winners at their earliest stages of momentum. Icon Ventures investments include iconic, market-leadingcompanies such as Aster Data, FireEye, 41st Parameter, Infinera, MoPub, Palo Alto Networks and Proofpoint. For more information visit: iconventures.com.
Icon Ventures Contacts
| Name | Phone | Socials | |
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Jeb Miller
General Partner
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Ben Shih
Partner
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Debby Meredith
Venture Partner
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Joseph Horowitz
Managing General Partner
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Paul Sallaberry
Venture Partner
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FAQ
What does Joseph Horowitz invest in?
Joseph Horowitz invests primarily in Mobile, Security and Software startups, most often at Series C and Series B stage. Most of the 25 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Joseph Horowitz?
Public channels for Joseph Horowitz include LinkedIn, X (Twitter) and the website linked on this profile. 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 Joseph Horowitz last invest?
The most recent investment recorded for Joseph Horowitz closed in May 2025. Shizune tracks 25 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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