About Amplifier Ventures
Amplifier Ventures is a venture capital firm founded in 2004. It is primarily based out of Mclean, United States. As of Jan 2012, Amplifier Ventures has invested in 10 companies. It primarily invests in Seed round in United States based startups. Its investments are spread across a wide range of sectors from Enterprise Applications to Enterprise Infrastructure and Consumer. Most recently it participated in the $***** Seed round of SpydrSafe Overall, Amplifier Ventures portfolio has seen 5 acquisitions, namely Zenoss and RollStream. A lot of funds co-invest with Amplifier Ventures, with names like Intersouth Partners sharing a substantial percentage of its portfolio.Key Metrics
Amplifier Ventures' List of Top Investments
Amplifier Ventures has a portfolio of 10 companies. Their most notable investments include Zenoss and CardStar.Their portfolio spans across and United States. They have invested in Enterprise Applications, Enterprise Infrastructure, Consumer and 5 other sectors, across stages such as Seed, Series A and 1 more. Here is the list of top investments by Amplifier Ventures:
1. Zenoss
Cloud based platform offering infrastructure monitoring solution. It provides open source systems and cloud management software. It offers an end to end unified IT monitoring and management for both virtual and physical infrastructure, on premises or in the public cloud. The features include agentless event collection that integrates events, faults, errors, and alerts from every system and source in the IT infrastructure in a single interface. The clients include NASA, DARTMOUTH, HBO, Cognizant, BBC, etc.
Key facts about Zenoss
- Founded Year: 2005
- Location: Austin (United States)
- Stage: Acquired
- Total Funding till date: $57.3M
- Employee Count: 41 as on May 31, 2026
- Investors: Industry Ventures, Summit Partners and 7 Others
- Latest Funding Round: Series C, Feb 13, 2023, $*****
- Highlight: Acquired
2. CardStar
CardStar is mobile application maker connecting membership and rewards cards to smartphone. It helps consumers to manage scannable-cards with a single app. It also enables merchants to manage mobile deals and broadcast information to their customers. It was acquired by ConstantContact in 2012.
Key facts about CardStar
- Founded Year: 2008
- Location: Boston (United States)
- Stage: Acqui-Hired
- Total Funding till date: $2.03M
- Employee Count: 1 - 10 as on Jul 01, 2024
- Investors: Verizon, Acta Wireless and 2 Others
- Latest Funding Round: Series A, Aug 31, 2011, $*****
3. RollStream
RollStream is a provider enterprise community management software which delivers an online solution for accelerating communications and collaboration across the global supply chain. Some of the customers include McKesson Medical-Surgical, Owens & Minor and Tesco.
Key facts about RollStream
- Founded Year: 2005
- Location: Mclean (United States)
- Stage: Acquired
- Total Funding till date: $8.9M
- Employee Count: 11 - 50 as on Jul 01, 2024
- Investors: Grotech Ventures, Core Capital Partners and 3 Others
- Latest Funding Round: Series B, Nov 18, 2008, $*****
- Highlight: Acquired
4. Hook Mobile
Hook Mobile is a mobile cloud services company providing Cloud Communication APIs and Tools. They offer mobile application programming interfaces (APIs) and software development kits (SDKs) to meet the customer mobile needs in messaging, carrier intelligence, device, and operating systems. They also offer Communication Platform as a Service which provides Cloud API's, Customer Portal & Analytics, One & Two-way SMS, Keyword & opt out support, notification & delivery receipts, anti spam tools, etc.
Key facts about Hook Mobile
- Founded Year: 2006
- Location: Vienna (United States)
- Stage: Acqui-Hired
- Total Funding till date: $937K
- Employee Count: 11 - 50 as on Jul 01, 2024
- Investors: Acta Wireless, Amplifier Ventures and 1 Other
- Latest Funding Round: Series A, Jan 2007, $*****
5. Defywire
Key facts about Defywire
- Founded Year: 2003
- Location: Reston (United States)
- Stage: Deadpooled
- Total Funding till date: $10.6M
- Employee Count: 10 as on Apr 30, 2026
- Investors: Anthem Capital Management, Intersouth Partners and 4 Others
- Latest Funding Round: Series C, Mar 27, 2007, $*****
Amplifier Ventures' Investments by Stage
Amplifier Ventures has made 6 investments in Seed stage with an average round size of $683K, 1 investment in Series A stage with an average round size of $4.8M and 1 investment in Series C stage with an average round size of $7M.Stage of entry | No. of Investments |
|---|---|
Seed | 6 |
Series A | 1 |
Series C | 1 |
Note: We have considered here, only first round of investments
Amplifier Ventures' Investments by Sector
Amplifier Ventures has a diverse portfolio, with companies operating in the Enterprise Applications, Enterprise Infrastructure, Consumer, EdTech and Industrial Goods and Manufacturing. Notably, it has invested in 9 Tech companies, 7 Software companies, 6 Enterprise (B2B) companies and at least 4 companies focusing on Consumer (B2C).Sector | No. of Investments |
|---|---|
Enterprise Applications | 3 |
Enterprise Infrastructure | 2 |
Consumer | 1 |
EdTech | 1 |
Industrial Goods and Manufacturing | 1 |
Others | 3 |
Note: We have considered here, only first round of investments
Amplifier Ventures' Investments by Geography
Amplifier Ventures has made most investments in United States (8).Amplifier Ventures' recent investments
Amplifier Ventures has not made any investment in 2026 so far.Here are the most recent investments by Amplifier Ventures:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Jan 17, 2012 | United States | Seed | 7193 | - | |
Jan 15, 2011 | United States | Seed | 2030 | - | |
Mar 11, 2010 | United States | Series A | 7294 | [+1] | |
2009 | United States | Seed | 5884 | - | |
2009 | United States | Seed | 1855 | - |
Acquired companies in Amplifier Ventures' Portfolio
5 companies from Amplifier Ventures' portfolio have been acquired. The most recent acquisition was Zenoss in May 2025 by Virtana for $*****.Here are Amplifier Ventures' portfolio companies that got acquired most recently:
Company | Acquisition Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
May 14, 2025 | Aug 11, 2006 | Series A | 1792 | |
Aug 02, 2018 | - | - | 4856 | |
Nov 07, 2014 | Jan 17, 2012 | Seed | 1868 | |
Jan 19, 2012 | 2009 | Seed | 6476 | |
Mar 29, 2011 | Sep 2005 | Seed | 5891 |
Co-investors of Amplifier Ventures
Over the past 21 years, 16 investors have co-invested in Amplifier Ventures's portfolio companies. This includes only funds.
- Invested before Amplifier Ventures: Liquid Capital Group, Intersouth Partners and 2 others have invested in rounds before Amplifier Ventures. There is 1 company where Liquid Capital Group has invested before Amplifier Ventures and 1 company where Intersouth Partners has invested before Amplifier Ventures.
- Top Co-investors of Amplifier Ventures: 3 investors entered a company along with Amplifier Ventures. These include investors like Intersouth Partners (2 companies).
- Invested after Amplifier Ventures: A total of 9 investors have invested in Amplifier Ventures's portfolio after their investments. Top Investors include Grotech Ventures (2 companies), Center for Innovative Technology (2 companies) and Maryland Venture Fund (1 company).
Recent News related to Amplifier Ventures
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VCs Bits into Flatburger - PE HubPE Hub•May 18, 2007•Flat Burger, Intersouth Partners, Amplifier Ventures
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