John Taysom
Angel Investor · CEO and Founder at Reuters Venture Capital
London, United Kingdom
John Taysom is a seed investor at Reuters Venture Capital in London focused on Software and Machine Learning. John Taysom started the Reuters Venture Capital Fund in Palo Alto in 1995 making 82 investments in internet and web infrastructure and services including Verisign, UltraDNS, Digimarc, ZeroKnowledge and Intertrust. He was a member of the Board of Digimarc pre and post its Nasdaq IPO, a Board member at Intertrust and a Board member at TIBCO throughits Nasdaq IPO. To date, seventeen of his investments have achieved an IPO.John acquired the Fund in an MBO in 2002. Now London-based with a seed portfolio of thirty US and UK start-ups; one has achieved an IPO and several have been acquired by Experian, Linkedin, Tesco, BMC and others.In 2011 and 2012 John took a Fellowship at Harvard to work on privacy issues and holds EU and US patents on a method of improving privacy online. For 2015 John is a Policy Fellow at the University of Cambridge Centre for Science and Policy and a Visiting Professor, Department of Computer Science, at UCL. He is a member of the Board of the Web Science Trust; chairs Performance Horizon, a fast growing UK startup; is a Governor at Hurstpierpoint College; and runs a small farm in Devon.
- Total investments:
- 19
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries John Taysom invests in
Stages John Taysom invests in
Countries John Taysom invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $500k–$4.3M
- Angel
- $191k–$1.2M
- Pre-Seed
- $234k–$3M
Investment Focus
Industry
- Software 6 (32%)
- Machine Learning 4 (21%)
- Information Technology 4 (21%)
- Mobile 3 (16%)
- Analytics 3 (16%)
Stage
- Seed 10 (53%)
- Angel 4 (21%)
- Pre-Seed 2 (11%)
- Series A 1 (5%)
- Series B 1 (5%)
Country
- United Kingdom 11 (58%)
- United States 4 (21%)
- Switzerland 1 (5%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Tenyks is a University of Cambridge spin-out inventing the way humanity interacts with AI to protect the world from the terminator. Our MLOps monitoring and validation platform helps ML Engineers working with computer vision data to build more reliable software faster. Specifically, our platform helps ML Engineers understand what's wrong withtheir algorithms and fix issues. Our technology is based on 2 PhD and 1 Master theses in Explainable AI from the University of Cambridge. | $3.4M / Seed / Mar 06, 2022 | ||
Corintis
|
Corintis develops cooling technologies for high performance semiconductors. | $4.3M / Seed / Jan 21, 2022 | |
| Worldr is a private, secure and compliant team communication app. While the user experience was designed to be extremely simple and effective, the back-end was architected to be deployable as if it were an in-house application.Worldr is a solution for larger companies, and especially regulated ones, who may not able to use third-partycollaboration applications because of 1) the threat to their data security and 2) lack of Compliance transparency.With 150 companies already signed up for our Beta, ranging from small startups to teams within major banks, Worldr is fully publicly launching in 2021.Please find the landing page at worldr.com | $2.8M / Seed / Jul 20, 2021 | ||
| We’re on a mission to help enterprises ensure their communication tools are secure, compliant and efficient.Valarian’s software allows multinational organisations to make the communication tools they already use compliant with data sovereignty, protection and privacy laws across jurisdictions worldwide. Valarian’s resilient, scalable platform canbe deployed into any environment (on-prem, cloud, or hybrid) and easily integrates with existing business collaboration tools like Microsoft Teams and WhatsApp, harmonising compliance, security and efficiency. | $3M / Pre-Seed / Jul 20, 2021 | ||
| LGN is a developer of artificial perception technology used to balance and automatically connect the AI system to the sensor array. Its technology reduces capture and processing costs by automatically filtering data to only record and process edge cases and by transferring and storing data in a highly compressed form that enable industries with areduced chip cost and power consumption whilst allowing high-level autonomy on lower-cost commodity sensors. | $1.9M / Seed / Mar 23, 2021 | ||
| Pangaea Data provides a machine learning-based software solution making scientific and clinical data more meaningful. | Seed / Jan 28, 2021 | ||
| Encore is the UK's fastest-growing marketplace for hiring outstanding musicians. Trusted by thousands of customers ever year, who have written reviews for our musicians with an average score of 4.96 out of 5. | $685.3K / Seed / Oct 31, 2016 | ||
| Encore is the UK's fastest-growing marketplace for hiring outstanding musicians. Trusted by thousands of customers ever year, who have written reviews for our musicians with an average score of 4.96 out of 5. | $191K / Angel / Aug 01, 2015 | ||
| Encore is the UK's fastest-growing marketplace for hiring outstanding musicians. Trusted by thousands of customers ever year, who have written reviews for our musicians with an average score of 4.96 out of 5. | $234.3K / Pre-Seed / Aug 01, 2015 | ||
| Privitar is an enterprise software company with a global client-base across North America, Europe, and Asia. The company is the development and adoption of privacy engineering technology enabling its customers to innovate and leverage data with an uncompromising approach to data privacy. Its software is designed to allow clients to analyzepotentially sensitive data while respecting customers’ privacy and confidentiality, resulting in the ability to leverage large, sensitive data sets while ensuring compliance with regulations (such as GDPR, CPRA and HIPAA) and ethical data principles.Privitar was founded in 2014 and is based in London, UK. | $1.2M / Angel / Jul 17, 2015 | ||
| See all 19 investments → | |||
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FAQ
What does John Taysom invest in?
John Taysom invests primarily in Software, Machine Learning and Information Technology startups, most often at Seed and Angel stage. Most of the 19 investments tracked by Shizune back companies in United Kingdom. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is John Taysom's check size?
John Taysom typically joins rounds of $500k–$4.3M at Seed, $191k–$1.2M at Angel and $234k–$3M at Pre-Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds John Taysom participates in.
How do I contact John Taysom?
Public channels for John Taysom include LinkedIn and Facebook. 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 John Taysom last invest?
The most recent investment recorded for John Taysom closed in Mar 2022. Shizune tracks 19 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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