Michael Santullo
Angel Investor
Palo Alto, United States
Michael Santullo is a seed investor in Palo Alto focused on Software and Email. Michael Santullo is the Advisor of Bloodhound Inc.Michael was the CEO and Co - Founder of the early Internet start-up Four11. He led the company from two-person start-up until the successful acquisition by Yahoo in 1997.Since leaving Yahoo, Michael has become actively involved with a number of early stage companies. He was an Investor andBoard Member with DirectHit, a successful search company acquired by Ask Jeeves in 2000. Currently, he is an advisor to,ProspX, Brandmail Solutions, GoGoVerde . Michael is a Board Member and Co - Founder of the Clean Tech Open, the nation's leading competition for clean technology start-ups. Michael is also a partner with the Cleantech Circle, a group of serial entrepreneurs and investors based in Silicon Valley who are committed to the growth and adoption of renewable energy generation and resource/energy efficiency technologies.Prior to Four11, Michael spent 10 years in a variety of engineering, project management, and product marketing roles working on products ranging from consumer electronics to high speed fiber optic transmission systems. His achievements from this period include a patent in the field of telecommunications and a Business Week Product Design Award. Michael holds a BSEE from M.I.T.
- Total investments:
- 4
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Michael Santullo invests in
Stages Michael Santullo invests in
Countries Michael Santullo invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $800k–$1.6M
Investment Focus
Industry
- Software 3 (75%)
- Email 2 (50%)
- Information Technology 2 (50%)
- CRM 1 (25%)
- Apps 1 (25%)
Stage
- Seed 3 (75%)
- Series A 1 (25%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Hub was developed specifically to help the presales individual contributor and leadership manage their daily activities to win more business. Hub is the presales source of record that integrates with popular customer relationship management (CRM) and productivity applications.The Hub presales productivity platform supports the following businessoutcomes:"Make every presales perform like your best presales professional""Ensure that right people are working on the right things""Advocate for the right product features that will drive the right revenue""Automate CRM data entry associated with presales activities""Improve collaboration on presales opportunities that matter the most""Access a unified presales workspace for jobs that need attention"Hub is the presales productivity platform that support individual contributors with technical discovery, presentation, demonstration, solution definition, service scoping and evaluation (POC/POV) management. Hub also provides presales management with greater analysis, insights, understanding of product gaps holding up revenue, provide their own presales forecast view on sales, make data driven investments and take corrective actions based on leading indicators.To learn more about Hub, please visit www.hub.inc. | $1.6M / Seed / Dec 31, 2021 | ||
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PowerInbox - DynamicMail business
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PowerInbox - DynamicMail business automatically transform static email HTMLs into dynamic, interactive content so recipients get content that is updated for relevancy in real-time upon open. | $800K / Seed / Oct 06, 2011 | |
| TheBrain Technology helps people make sense of the wide range of information they need to organize and assimilate on a daily basis. They believe that two Brains are better than one. And if you extend and capture your thinking about your projects and life you can get some amazing stuff done. | $3M / Series A / Jan 21, 2000 | ||
| Jeeng is bringing the power of AI and data intelligence to digital publishers with our proprietary solutions for driving audience engagement and revenue. The company's dynamic team of automation and data experts is delivering transformative data-driven engagement strategies to the fast-changing publishing industry.The company's uniquecontent personalization solution is the only one of its kind that leverages first-party, opt-in data to help publishers build loyal, engaged, 1:1 subscriber relationships. With Jeeng's platform, publishers can end their reliance on the walled gardens of search and social media and move beyond cookies to more accurately curate content and ads and deliver them directly to subscribers at the right time on the right channel.Named a Fast Growth Icon, an Inc. 500 Company, a Crain’s Fast 50, and a Red Herring 100 Winner, Jeeng fuels the multichannel messaging strategy for over 700 publishers, including The Atlantic, Crain’s Harper Collins, and Vox Media. With a proven track record for growth, they have seen a solid 165% CAGR over the last 5 years, and they invest heavily in R&D, with over 50% of their global team working directly in technology development. | Seed |
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FAQ
What does Michael Santullo invest in?
Michael Santullo invests primarily in Software, Email and Information Technology startups, most often at Seed and Series A stage. Most of the 4 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What round sizes does Michael Santullo invest in?
Michael Santullo typically joins rounds of $800k–$1.6M at Seed. These are whole funding-round sizes, not Michael Santullo's own check, which is rarely disclosed: the 10th–90th percentile of the confirmed public funding rounds Michael Santullo took part in.
How do I contact Michael Santullo?
Public channels for Michael Santullo 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 Michael Santullo last invest?
The most recent investment recorded for Michael Santullo closed in Dec 2021. Shizune tracks 4 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 Nov 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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