Our Story

Gather round the fire, to hear the tale of how the lives of over 2 million network pros were changed by the power of sheer determination and an unhealthy amount of energy drinks.

It all started with a man and a Master's thesis.

Like many great ideas, GNS3 began in a dorm room in 2006. Jeremy Grossmann was working on his Master's thesis – an arduous undertaking that could have shackled him to a computer lab for two years.

Until, in a flurry of croissants and French press coffee, he hit on something big. Something that would allow him to test and design networks anywhere in the world: GNS3. It was the kind of idea that makes people do crazy things, and for Jeremy, that was packing everything up and moving to Canada.

It's alive.

From our new home in the great white north, GNS3 started to grow. Our open source model and intuitive interface made us a favorite of students training for their network certifications and network professionals working for some of the biggest companies around. In just a few years, we went from a school project to a thriving community of over 2 million users. But we wanted to make it better...

All for one, and one for multi-vendor environments and switching functionality.

We asked all of our friendly neighborhood network professionals what they'd like to see in the new GNS3 and launched a crowdfunding campaign to bring our collective baby kicking and screaming into the world. Thanks to the generosity of our community, we raised over $600,000. So we put on a fresh pot of coffee, cracked a few energy drinks and got to work.

Our brand:
A chameleon is born.

The chameleon is many things to many people, but has a singular mission – beyond eating as many insects as possible – to empower all the network professionals in the world. Responsive, approachable and adaptable, the chameleon is as comfortable in a boardroom as it is in a dorm room, just as our GNS3 software is.

The next big thing...er, bigger things.

We're dedicated to making the lives and jobs of network professionals around the world better. Whether you are studying for your first network certification or designing a state-wide telecommunication network, GNS3 is here for you. Plus, we have a ton of ideas for making our community better sitting on the cooling rack until they're fit for human consumption. Check back often to see what we're up to... or to just hangout.

Our Team

Stephen Guppy

Co-Founder & Chief Executive Officer

Stephen has been typing his fingers off working on expanding GNS3's platform and community over the past two years and has been recognized as a leading entrepreneur and mentor in Canada's start-up community. He has analytic-backed marketing experience that would make Bobby Fisher weep and has owned, operated or managed over 150 websites over the past decade. Stephen earned his BBA in Business Administration and Management at Mount Royal University.

Jeremy Grossmann

Co-Founder and Chief Technology Officer

Prior to his role at GNS3, Jeremy worked in a number of network engineering-related roles for firms including TELUS and Saint-Gobain DSI Groupe. He holds multiple networking certifications from firms including Cisco (CCNP and CCIE #39392) and Juniper Networks (JNCIA). Jeremy earned an MS in Information Technology at the European Institute of Technology, Paris, and earned an MS in Network Systems at Swinburne University of Technology, Melbourne. Yup, our boy is wicked smart.

Mark Blackwell

Chief Operating Officer

Before pledging allegiance to the chameleon, Mark worked as a venture investor for one of Canada's leading corporate funds, Cenovus Energy, where he led and managed a number of investments with active board participation. He was previously an Investment Banking Analyst at CIBC World Markets, and before that worked as a Business Analyst at Enbridge. Mark earned his BComm at the University of Calgary with executive training at Harvard Business School and Hass School of Business at UC Berkeley.

Matt Raio

Manager Support Services

Since 1997, Matt has held a variety of IT operations positions ranging from help desk support for AT&T to network planning, building and mentoring in the education space. In 2013, he became a solutions architect for a small VAR firm where he used GNS3 to obtain his CCNA (200-120), BCNE and JNSEE. With his extensive experience working with GNS3 and comfort with wide variety of network sizes, Matt can help with everything from mind-melting hundred-node network topologies to choosing the best pair of socks for a big presentation. He is very proud to take this step with GNS3 and is looking forward to helping network professionals across the world reach their goals.

Board of Advisors

Tom Erickson

Tom has spent the past 20 years working with venture-backed start-ups as a venture capitalist and research analyst at BlueStream Ventures, Dain Rauscher Wessels, and its predecessor, Wessels, Arnold & Henderson.

In 2000, as Co-founder and General Partner of BlueStream Ventures, Tom helped raise $280 million in committed capital from institutional and individual investors. The fund focused on investments in the communications, enterprise and infrastructure software, storage, and wireless markets.

Prior to BlueStream, Tom was a leading Analyst in the network technology space. From 1998 to 2000, he was a Managing Director at Dain Rauscher Wessels and head of its technology research group. He held a similar role at Wessels, Arnold & Henderson from 1990 to 1998 and served as Director of Research at both firms. Institutional Investor magazine recognized Tom as a leading networking research analyst in its “Best of the Boutiques” survey from 1994 to 1998.

Tom holds a Bachelor of Arts in Mathematics with a concentration in Computer Science from St. Olaf College and an MBA from the Kellogg School of Management at Northwestern University. He is also a Chartered Financial Analyst.

Alireza Masrour

Alireza is Managing Partner at Plug & Play Ventures where he has been responsible for technology investments since 2008. He assists portfolio companies with executive recruiting, strategic partnerships, product strategies, customer and partner introductions, fundraising and market strategy. He is an investor in Skytree, Aarki, Getgoing, Virool, PiCloud, HealthPocket and many other companies.

Prior to Plug and Play, Alireza was Founder and CEO at NekaTel, one of the world's largest Internet airtime distribution networks, with over 800 retailers and millions of subscribers as of 2013. Alireza grew NekaTel's revenue from $0 to over $45M in less than 2 years. He was also the founder of VidaTel, a mobile airtime distribution technology company, which he sold in 2007. He was also CEO and board member of the Science and Arts Foundation, an international non-profit organization that helps empower youth via new technology.

See all our contributors


GNS3 in a Glance!

Headquarters: Calgary, AB

Offices in
San Francisco, CA

Network Professionals in Community


in Crowdfunding

Our Customers

GNS3 helps our growing community of users that represent some of the largest companies in the world, across all industries, design and build multi-vendor networks without the need for physical hardware infrastructure.

"Using GNS3 with Chef helped us decrease network management and improve performance. The advancements being made at GNS3 are perfectly aligned with the new world of IT."

Pauly Comtois,
VP of Product at Chef

"If we had to buy truckloads of hardware, then configure and reconfigure it every time we wanted to test, we'd be tearing our hair out. Luckily, GNS3 can handle all that for us. And we know the network the GNS3 system shows us is as true as having the hardware in front of us."‬‬

Marc Morin,
CEO of Auvik

  • AT&T
  • Exxon
  • Pfizer
  • Tata Communications
  • NASA
  • HSBC
  • Intel
  • PG&E
  • Riverbed
  • Verizon
  • Sprint
  • Target
  • US Navy
  • EY
  • IBM
  • Alcatel
  • Novartis
  • Citrix
  • Duke Energy
  • Deloitte
  • Huawei
  • Juniper
  • Deutsche Bank
  • Hewlett Packard
  • Extreme Networks
  • EDF
  • Chevron
  • PetroChina
  • accenture

Interested in getting in front of the network professionals at these organizations?
Click here to learn more on how to partner with GNS3.


If you're smart, motivated and the best at what you do, you'll fit right in! We are looking for incredible people who are passionate about supporting the world's largest community of network professionals.


Help us build the best experience for our community of network pros.


Wear many hats and develop new skills working with a close-knit group in a fast-paced, growth-focused environment.


We don't take things too seriously at GNS3. We keep it casual at the office and provide our team with as many Red Bull and Skittles as needed to get the job done.


Follow us on LinkedIn and get regular updates to new postings at GNS3.

GNS3 is Hiring! Become the next GNS3er.

Click here for current positions or submit your resume directly to [email protected]

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Canadian Headquarters

GNS3 Technologies Inc.
288, 200 - Rivercrest Drive SE
Calgary, AB T2T 2X5

US Headquarters

GNS3 Technologies Inc.
440 – N Wolfe Road
Sunnyvale, CA, 94085

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