Bill McKiernan
Angel Investor
Los Gatos, United States
Bill McKiernan is a seed investor in Los Gatos focused on E-Commerce and SaaS. William S. McKiernan, Bill founded CyberSource Corp. in 1994 and served as its Chief Executive Officer from December 1997 to January 1, 2010. Mr. McKiernan served as Chief Executive Officer of Beyond.com corp., from 1994 to March 1998. From 1992 to 1994, he was employed by Network Associates (formerly known as McAfee Associates, Inc.) a developerof computer security software, where he served as President and Chief Operating Officer during its initial public offering since October 1992. Prior to joining McAfee Associates in 1992, Mr. McKiernan served as Vice President of Princeton Venture Research, Inc., an investment banking and venture consulting firm from 1990 to 1992. He also held management positions with IBM/ROLM, a telecommunications company, and Price Waterhouse. He is the Founder of CyberSource Limited and serves as its Executive Chairman. He served as Chairman of the Board of Cybersource Corp. since December 1997. He Founded Beyond.com, an online reseller of computer software, in 1994 and served as its Chairman of the Board since March 1998. He serves as a Director of Vertical Software, Inc. He served as a Director of Cybersource Corp. since December 1997. Mr. McKiernan holds a B.S. from Boston College and an M.B.A. from the Harvard Business School.
- Total investments:
- 3
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Bill McKiernan invests in
Stages Bill McKiernan invests in
Countries Bill McKiernan invests in
Contacts
| Type | Contact | Validation |
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| Work email | ||
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Investment Focus
Industry
- E-Commerce 2 (67%)
- SaaS 1 (33%)
- Bitcoin 1 (33%)
- FinTech 1 (33%)
- Payments 1 (33%)
Stage
- Seed 1 (33%)
- Series A 1 (33%)
- Series B 1 (33%)
Country
- United States 2 (67%)
- Ireland 1 (33%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Signifyd is a SaaS-based, enterprise-grade fraud technology solution for e-commerce stores. It simplifies fraud detection through a financial guarantee, allowing businesses to increase sales while reducing fraud losses. It was founded based on the belief that e-commerce businesses should be able to grow without fear of fraud. The solution solvesthe challenges that growing e-commerce businesses persistently face: billions of dollars lost in chargebacks, customer dissatisfaction from mistaken declines, and operational costs due to tedious, manual transaction investigations. Launched in 2011, Signifyd is used by multiple companies on the Fortune 1000 and Internet Retailer Top 500 lists. | $20M / Series B / Feb 25, 2016 | ||
| ChangeX is a platform connecting communities to proven social and environmental innovations and the finance and resources to get them started. | $437.2K / Seed / Jul 22, 2015 | ||
| Bitnet provides a digital commerce platform enabling enterprise-scale merchants to accept bitcoin payments. Bitnet’s engineering, product, and business development team help in building and managing the world’s largest payment gateway, CyberSource (NASDAQ: CYBS), which was sold to the world’s largest payment network, Visa (NYSE: V), for $2billion in 2010. | $14.5M / Series A / Oct 20, 2014 |
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FAQ
What does Bill McKiernan invest in?
Bill McKiernan invests primarily in E-Commerce, SaaS and Bitcoin startups, most often at Seed and Series A stage. Most of the 3 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 Bill McKiernan?
Public channels for Bill McKiernan include LinkedIn. 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 Bill McKiernan last invest?
The most recent investment recorded for Bill McKiernan closed in Feb 2016. Shizune tracks 3 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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