# Santiago Izaguirre

> Santiago Izaguirre is a seed investor at Harvard Business School Angels of London backing Email. See 3 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Harvard Business School Angels of London](https://shizune.co/investors/profile/harvard-business-school-angels-of-london-2)
- Location: London, United Kingdom
- Total investments: 3
- Last investment: Dec 2018
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/santiago-izaguirre-390221/
- Website: https://www.stout.com/en/professionals/santiago-izaguirre

Santiago Izaguirre is a Managing Director at Stout. He attended Harvard Business School.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Email | 1 | 33% |
| Consumer Goods | 1 | 33% |
| Cyber Security | 1 | 33% |
| Machine Learning | 1 | 33% |
| Professional Services | 1 | 33% |

6 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 33% |
| Pre-Seed | 1 | 33% |
| Funding Round | 1 | 33% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Mayku | Mayku provides a platform for creators to access machines, materials, and services in order to create their own products. FormBox, Mayku's product, is a desktop-sized vacuum former that allows users to easily create a mold or model of their choice at a low cost. Mayku's other product, the Multiplier, is a machine that uses pressureforming to enable rapid production scaling. Mayku enables the manufacture of products locally, quickly, and affordably by providing creators with the hardware, raw materials, and software required to produce a wide range of items. It accelerates the global shift to local manufacturing. |  |  | Dec 01, 2018 |  |
| Tessian | Tessian’s mission is to secure the human layer. Using machine learning technology, Tessian automatically stops data breaches and security threats caused by human error - like data exfiltration, accidental data loss, business email compromise, and phishing attacks - with minimal disruption to employees' workflow. As a result, employees areempowered to do their best work, without security getting in their way. Founded in 2013, Tessian is backed by renowned investors like Sequoia, Accel, March Capital, and Balderton, and has offices in San Francisco and London. | $2.7M | Seed | Apr 04, 2017 |  |
| Tessian | Tessian’s mission is to secure the human layer. Using machine learning technology, Tessian automatically stops data breaches and security threats caused by human error - like data exfiltration, accidental data loss, business email compromise, and phishing attacks - with minimal disruption to employees' workflow. As a result, employees areempowered to do their best work, without security getting in their way. Founded in 2013, Tessian is backed by renowned investors like Sequoia, Accel, March Capital, and Balderton, and has offices in San Francisco and London. | $276K | Pre-Seed | Jun 30, 2015 |  |

3 of 3 investments shown.

## Co-investors
- [Accel](https://shizune.co/investors/profile/accel) — VC Fund, 1 deal together
- [Amadeus Capital Partners](https://shizune.co/investors/profile/amadeus-capital-partners) — VC Fund, 1 deal together
- [Crane Venture Partners](https://shizune.co/investors/profile/crane-venture-partners) — VC Fund, 1 deal together
- [Fraser](https://shizune.co/investors/profile/fraser-finance) — VC Fund, 1 deal together
- [LocalGlobe](https://shizune.co/investors/profile/localglobe) — VC Fund, 1 deal together
- [Winton Ventures](https://shizune.co/investors/profile/winton-ventures) — VC Fund, 1 deal together

## About Harvard Business School Angels of London

VC Fund · London, United Kingdom

The Harvard Business School Angels of London is a Harvard University affiliated group committed to investing.

1 contacts available at Harvard Business School Angels of London.

| Name | Title | Profile |
| --- | --- | --- |
| Santiago Izaguirre | Co-Chairman | https://shizune.co/investors/profile/santiago-izaguirre |

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## FAQ

### What does Santiago Izaguirre invest in?

Santiago Izaguirre invests primarily in Email, Consumer Goods and Cyber Security startups, most often at Seed and Pre-Seed stage. Most of the 3 investments tracked by Shizune back companies in United Kingdom. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Santiago Izaguirre last invest?

The most recent investment recorded for Santiago Izaguirre closed in Dec 2018. 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 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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