Gary Rubinoff
Managing Partner @ Summerhill Venture Partners
Gary Rubinoff is a Series B investor at Summerhill Venture Partners focused on SaaS and Mobile. Gary brings over 19 years of venture investing experience. He focuses on a broad range of opportunities including mobile computing, cloud computing, broadband communications and digital media. Gary is based in Boston and represents Summerhill on the board of Jumptap and Scribble Technologies.For the 9 years prior to joining Summerhill VenturePartners, Gary was a partner at J.L. Albright Venture Partners LP and Jefferson Partners LP, both Wireless and IT focused VC funds based in Toronto. Gary’s wide range of experience in finance, law and entrepreneurial management, enables him to play a significant role in financing and growing emerging technology companies.Past investments include Intellon (Acquired by Atheros, NASDAQ: ATHR), Sandbridge (acquired by a Fortune 500 company), BridgePort (acquired by CounterPath, TSX: CCV), Service Soft (acquired by Kana Software, NASDAQ: KANA), Isolation Systems (acquired by Shiva/Intel, NASDAQ: INTC), I-star Internet (TSE IPO and acquired by PSI Net), and Wescam Inc. (TSE IPO: WSC).Gary is a member of Young Presidents Organization (YPO), Ontario Chapter, a Leader of Sick Kids Hospital Foundation (Hospital for Sick Children, Toronto), and an active fundraiser for Juvenile Diabetes.Gary holds a LLB from the School of Law, University of Western Ontario, and an MBA from the Richard Ivey School of Business.
- Total investments:
- 11
- Last investment:
- Lead investor:
- 27%
Last updated:
For AI agents: llms.txt
Industries Gary Rubinoff invests in
Stages Gary Rubinoff invests in
Countries Gary Rubinoff invests in
Contacts
| Type | Contact | Validation |
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| Personal email | ||
| Work phone | ||
| Personal phone | ||
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Investment Focus
Industry
- SaaS 1 (9%)
- Mobile 1 (9%)
- Computer 1 (9%)
- Software 1 (9%)
- Ad Network 1 (9%)
Stage
- Series B 3 (27%)
- Series A 2 (18%)
- Series C 2 (18%)
- Series D 2 (18%)
- Funding Round 1 (9%)
Country
- United States 2 (18%)
- Canada 1 (9%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
ScribbleLive
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ScribbleLive is a content cloud provider that helps companies manage the lifecycle of their content. It provides global brands with the services and solutions they need to create premium content at scale. The company's managed services provide clients with program and campaign coverage including dashboards and program reporting. Its servicesoffered includes content strategy, creative services, implementation, integration, and IT support. ScribbleLive was founded in 2008 and is headquartered in Toronto, Ontario. | $25.6M / Series D / Sep 23, 2015 | |
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ScribbleLive
|
ScribbleLive is a content cloud provider that helps companies manage the lifecycle of their content. It provides global brands with the services and solutions they need to create premium content at scale. The company's managed services provide clients with program and campaign coverage including dashboards and program reporting. Its servicesoffered includes content strategy, creative services, implementation, integration, and IT support. ScribbleLive was founded in 2008 and is headquartered in Toronto, Ontario. | $12M / Series C / Oct 02, 2014 | |
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ScribbleLive
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ScribbleLive is a content cloud provider that helps companies manage the lifecycle of their content. It provides global brands with the services and solutions they need to create premium content at scale. The company's managed services provide clients with program and campaign coverage including dashboards and program reporting. Its servicesoffered includes content strategy, creative services, implementation, integration, and IT support. ScribbleLive was founded in 2008 and is headquartered in Toronto, Ontario. | $5.9M / Series B / Jun 19, 2013 | |
Jumptap
|
Jumptap is a mobile ad network and the leader in targeted mobile advertising. Reaching 107 million mobile users in the U.S. and 156 million mobile users worldwide, Jumptap uses its extensive technology portfolio, as well as industry-first partnerships with third-party data providers, to understand mobile audiences better than any other adnetwork and provide intelligent targeting with scale. Through its large network of premium publishers and apps, and constant campaign optimization, Jumptap delivers the best ROI for advertisers and highest yield for publishers and developers. Jumptap has pioneered mobile advertising privacy standards and is committed to unlocking mobile opportunities for all parties through its ongoing industry research, such as its Understanding Mobile Audience series and monthly MobileSTAT reports. | $27.5M / Jul 02, 2012 | |
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ScribbleLive
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ScribbleLive is a content cloud provider that helps companies manage the lifecycle of their content. It provides global brands with the services and solutions they need to create premium content at scale. The company's managed services provide clients with program and campaign coverage including dashboards and program reporting. Its servicesoffered includes content strategy, creative services, implementation, integration, and IT support. ScribbleLive was founded in 2008 and is headquartered in Toronto, Ontario. | $2.9M / Series A / Nov 10, 2011 | |
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Jumptap
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Jumptap is a mobile ad network and the leader in targeted mobile advertising. Reaching 107 million mobile users in the U.S. and 156 million mobile users worldwide, Jumptap uses its extensive technology portfolio, as well as industry-first partnerships with third-party data providers, to understand mobile audiences better than any other adnetwork and provide intelligent targeting with scale. Through its large network of premium publishers and apps, and constant campaign optimization, Jumptap delivers the best ROI for advertisers and highest yield for publishers and developers. Jumptap has pioneered mobile advertising privacy standards and is committed to unlocking mobile opportunities for all parties through its ongoing industry research, such as its Understanding Mobile Audience series and monthly MobileSTAT reports. | $20M / Apr 01, 2011 | |
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Jumptap
|
Jumptap is a mobile ad network and the leader in targeted mobile advertising. Reaching 107 million mobile users in the U.S. and 156 million mobile users worldwide, Jumptap uses its extensive technology portfolio, as well as industry-first partnerships with third-party data providers, to understand mobile audiences better than any other adnetwork and provide intelligent targeting with scale. Through its large network of premium publishers and apps, and constant campaign optimization, Jumptap delivers the best ROI for advertisers and highest yield for publishers and developers. Jumptap has pioneered mobile advertising privacy standards and is committed to unlocking mobile opportunities for all parties through its ongoing industry research, such as its Understanding Mobile Audience series and monthly MobileSTAT reports. | $26M / Series D / Aug 26, 2008 | |
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Jumptap
|
Jumptap is a mobile ad network and the leader in targeted mobile advertising. Reaching 107 million mobile users in the U.S. and 156 million mobile users worldwide, Jumptap uses its extensive technology portfolio, as well as industry-first partnerships with third-party data providers, to understand mobile audiences better than any other adnetwork and provide intelligent targeting with scale. Through its large network of premium publishers and apps, and constant campaign optimization, Jumptap delivers the best ROI for advertisers and highest yield for publishers and developers. Jumptap has pioneered mobile advertising privacy standards and is committed to unlocking mobile opportunities for all parties through its ongoing industry research, such as its Understanding Mobile Audience series and monthly MobileSTAT reports. | $22M / Series C / Oct 04, 2006 | |
Tello
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Tello is a flexible telecom provider operating on the U.S. market. We offer a clean, upfront service with no fees whatsoever. Our monthly plans are customizable, as our customers can choose their preferred amount of minutes and data, and all include unlimited text. What’s more, our plans can be upgraded, downgraded, or renewed at any time, for nocharge at all.Some perks of the service include free tethering: Tello customers can share data free of charge with other devices, and unlimited throttled data once the 4G data allotment is used up. But where we really stand out is our Customer Support: when our customers need help, they reach a real human being 100% of the time, no waiting on the line or speaking to robots.Tello.com is a brand of KeepCalling, a global telecommunications company registered in 2002 in USA. Presently, KeepCalling provides its services to hundreds of thousands of consumers and businesses, with a focus on customer satisfaction. KeepCalling has been listed by Inc 5000 as one of the fastest growing companies in the USA for 5 consecutive years. In 2015 the company registered a revenue increase of over 200% from 2011 to 2014. | $10M / Series B / Jul 25, 2006 | |
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Jumptap
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Jumptap is a mobile ad network and the leader in targeted mobile advertising. Reaching 107 million mobile users in the U.S. and 156 million mobile users worldwide, Jumptap uses its extensive technology portfolio, as well as industry-first partnerships with third-party data providers, to understand mobile audiences better than any other adnetwork and provide intelligent targeting with scale. Through its large network of premium publishers and apps, and constant campaign optimization, Jumptap delivers the best ROI for advertisers and highest yield for publishers and developers. Jumptap has pioneered mobile advertising privacy standards and is committed to unlocking mobile opportunities for all parties through its ongoing industry research, such as its Understanding Mobile Audience series and monthly MobileSTAT reports. | $17M / Series B / Dec 06, 2005 | |
| See all 11 investments → | |||
Co-Investors
Summerhill Venture Partners is an early-stage venture capital firm focused on the wireless, digital media, and IT sectors. It was founded in 1993 and is headquartered in Ontario, Canada.
Summerhill Venture Partners Contacts
| Name | Phone | Socials | |
|---|---|---|---|
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Gary Rubinoff
Managing Partner
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Hazel Krishnan
Executive Assistant
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Joe Catalfamo
Managing Partner
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Lara Frendjian
Controller
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FAQ
What does Gary Rubinoff invest in?
Gary Rubinoff invests primarily in SaaS, Mobile and Computer startups, most often at Series B and Series A stage. Most of the 11 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 Gary Rubinoff?
Public channels for Gary Rubinoff include LinkedIn and X (Twitter). 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 Gary Rubinoff last invest?
The most recent investment recorded for Gary Rubinoff closed in Sep 2015. Shizune tracks 11 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 Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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