# Sean Blanchfield

> Sean Blanchfield is a convertible note investor at Jentic backing Software. See 1 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Fund: Jentic
- Location: Dublin, Ireland
- Total investments: 1
- Last investment: Sep 2014
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/in/seanblanchfield
- X (Twitter): http://twitter.com/seanblanchfield
- Website: http://seanblanchfield.com
- Facebook: http://www.facebook.com/sean.blanchfield

Sean Blanchfield is a convertible note investor at Jentic in Dublin focused on Software and Analytics. Sean Blanchfield studied at Trinity College, Dublin and Trinity College, Dublin.

## Contacts

5 contacts available for Sean Blanchfield: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/sean-blanchfield?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 1 | 100% |
| Analytics | 1 | 100% |
| Advertising | 1 | 100% |
| Digital Media | 1 | 100% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| PageFair | PageFair’s mission is to sustain the open web by re-establishing a fair deal between users and content creators. The company does this by helping website owners and publishers detect and measure adblock, and protecting advertising inventory from being blocked.The company has two products: 1) PageFair Analytics, which is used by thousands ofpublishers for free, and measures adblock on over 11 billion pageviews per month, and 2) PageFair Ads, which serves advertising in a manner that adblockers are unable to circumvent, and solves the speed, privacy, and UX issues that cause adblocking in the first place.PageFair's founders personally experienced the damage adblocking can do to a website. While they recognize that visitors need to defend themselves from distracting, intrusive, inappropriate, disingenuous or malicious advertising, the rise of adblocking is now leading to the death of quality free websites.PageFair is an international startup based in Dublin, Ireland. Founded in 2012, the company was initially funded by its founders with additional seed capital from Tribal Ventures, Frontline Ventures, and Enterprise Ireland. Thoudands of publishers now use PageFair to measure the extent to which they are affected by adblocking and to display advertising to adblockers.PageFair is the global authority on adblocking trends, cited in The New York Times, The Financial Times, The Economist, Advertising Age, and others. | $88K | Convertible Note | Sep 08, 2014 |  |

1 of 1 investments shown.

## Co-investors
- [Frontline](https://shizune.co/investors/profile/frontline) — VC Fund, 1 deal together
- [Tribal.vc](https://shizune.co/investors/profile/tribal-vc) — VC Fund, 1 deal together

## About Jentic

VC Fund · Dublin, Ireland

Jentic Technology builds integration layer for AI, enabling developers to connect agents to the World.

4 contacts available at Jentic.

| Name | Title | Profile |
| --- | --- | --- |
| Dorothy Creaven | Co-Founder and Chief Operating Officer | — |
| Michael Cordner | Co-Founder | — |
| Sean Blanchfield | Founder | https://shizune.co/investors/profile/sean-blanchfield |
| Tilman Schaefer | Co-Founder & Chief AI Officer | — |

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## FAQ

### What does Sean Blanchfield invest in?

Sean Blanchfield invests primarily in Software, Analytics and Advertising startups, most often at Convertible Note stage. Most of the 1 investments tracked by Shizune back companies in Ireland. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Sean Blanchfield?

Public channels for Sean Blanchfield include LinkedIn, X (Twitter) and the website linked on this profile. 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 Sean Blanchfield last invest?

The most recent investment recorded for Sean Blanchfield closed in Sep 2014. Shizune tracks 1 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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