# David Shackleton

> David Shackleton is a seed investor at X (formerly Twitter) (Dublin) backing SaaS and Video. See 3 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [X (formerly Twitter)](https://shizune.co/investors/profile/twitter)
- Location: Dublin, Ireland
- Total investments: 3
- Last investment: Jun 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/in/dshackleton
- X (Twitter): http://twitter.com/dshackleton
- Website: https://x.com/dshackleton

David Shackleton is a seed investor at X (formerly Twitter) in Dublin focused on SaaS and Video. David Shackleton is the Product Head at OpenBack Integration of Twitter. Took up The Role and Responsibilities of Company Directors at Institute of Directors in Ireland.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| SaaS | 1 | 33% |
| Video | 1 | 33% |
| Internet | 1 | 33% |
| App Marketing | 1 | 33% |
| Collaboration | 1 | 33% |

11 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 33% |
| Angel | 1 | 33% |
| Venture - Series Unknown | 1 | 33% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Overcast HQ | Overcast uses Artificial Intelligence and Machine Learning to build powerful business tools to store, search and collaboration on video platform. It's all designed to help non-technical content owners manage their video content easily and securely. Modules include Voice to text to Captions, Image Recognition and Emotion Recognition. At thecore of the technology is a an automated encoding, transcoding and reformatting engine. Overcast works with marketers, production companies, agencies, creatives, and large video content owners to securely store, share and collaborate on their video content. They solve production bottlenecks. Because video files are so big and difficult to move around, it restricts how many can be made. Overcast makes it easy to scale the amount of video created. Overcast's technical partners include Amazon Web Services, Google Cloud and Microsoft Azure. | $1.2M | Venture - Series Unknown | Jun 03, 2024 |  |
| Bounce Insights | Bounce Insights is a digital consumer research platform. It provides a direct link between brands and any consumer they needed to speak to by maintaining a community of active, engaged respondents on their mobile app. | $1.1M | Angel | Nov 05, 2022 |  |
| OpenBack | OpenBack was the only mobile engagement platform with dynamic push notifications and device-side decisions by using mobile edge computing. The company was founded in 2015 and is headquartered in Dublin, Ireland. |  | Seed | May 01, 2018 |  |

3 of 3 investments shown.

## Co-investors
- [Enterprise Ireland](https://shizune.co/investors/profile/enterprise-ireland) — VC Fund, 1 deal together

## About X (formerly Twitter)

VC Fund · San Francisco, United States

X, formerly Twitter, is a global social networking platform that allows its users to send and read 280-character messages. It enables registered users to read and post their tweets through the web, short message service (SMS), and mobile applications. As a global real-time communications platform, X has more than 400 million monthly visitors and255 million monthly active users around the world. X’s active group of registered members includes World leaders, major athletes, star performers, news organizations, and entertainment outlets. It is currently available in more than 35 languages. X was launched in 2006 by Jack Dorsey, Evan Williams, Biz Stone, and Noah Glass. X is headquartered in San Francisco, California, USA, with local offices in Atlanta, Austin, Boston, Boulder, Chicago, Detroit, Los Angeles, New York, Sunnyvale, and Washington. X's international offices are located in Amsterdam, Berlin, Dublin, London, Madrid, Paris, Rio de Janeiro, Sao Paulo, Singapore, Sydney, Seoul, Tokyo, Toronto, and Vancouver.

5 contacts available at X (formerly Twitter).

| Name | Title | Profile |
| --- | --- | --- |
| David Shackleton | Product Head at OpenBack Integration | https://shizune.co/investors/profile/david-shackleton |
| Kayvon Beykpour | Head of Consumer Product | https://shizune.co/investors/profile/kayvon-beykpour |
| Linda Yaccarino | Chief Executive Officer | https://shizune.co/investors/profile/linda-yaccarino |
| Martijn de Kuijper | Senior Product Manager | https://shizune.co/investors/profile/martijn-de-kuijper |
| Ryan Merl | Senior Software Engineer | https://shizune.co/investors/profile/ryan-merl |

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### Similar country
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## Featured in investor lists
- [All Angel Investors in Ireland](https://shizune.co/investors/angel-investors-ireland)
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- [Enterprise Software Investors in Ireland](https://shizune.co/investors/enterprise-software-investors-ireland)

## FAQ

### What does David Shackleton invest in?

David Shackleton invests primarily in SaaS, Video and Internet startups, most often at Seed and Angel stage. Most of the 3 investments tracked by Shizune back companies in Ireland. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did David Shackleton last invest?

The most recent investment recorded for David Shackleton closed in Jun 2024. 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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