Saul Klein
Partner @ Index Ventures
London, United Kingdom
Saul Klein is a seed investor at Index Ventures in London focused on Software and Advertising. Saul Klein is the Co-Founder of ZINC. He previously worked at Government Digital Service as an Advisory Board Member. Saul Klein attended the University of Cambridge.
- Total investments:
- 66
- Last investment:
- Lead investor:
- 33%
Last updated:
For AI agents: llms.txt
Industries Saul Klein invests in
Stages Saul Klein invests in
Countries Saul Klein invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $800k–$5M
- Series A
- $2M–$13M
- Series B
- $5M–$30M
Investment Focus
Industry
- Software 9 (14%)
- Advertising 8 (12%)
- Internet 7 (11%)
- Information Technology 6 (9%)
- Analytics 5 (8%)
Stage
- Seed 22 (33%)
- Series B 13 (20%)
- Series A 12 (18%)
- Series C 6 (9%)
- Venture - Series Unknown 3 (5%)
Country
- United States 19 (29%)
- United Kingdom 15 (23%)
- Israel 4 (6%)
- Sweden 2 (3%)
- Canada 1 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Open Cosmos is a space technology company that designs, builds, and operates satellites to simplify access to space. The company also delivers end-to-end telecommunications, Earth Observation (EO), navigation, and scientific missions. It designs, builds, launches and operates advanced satellites through its OpenOrbit offering, that enablesorganizations to access and share data via its mutualized OpenConstellation infrastructure and offers AI-powered data analysis from a growing range of satellite sources and analytic partners through its DataCosmos platform. | $346.4M / Series C / Sep 14, 2026 | ||
| Trent AI creates AI applications and agent security management software. It aids in risk assessment and mitigation in systems utilizing autonomous or semi-autonomous software agents. The company's technology monitors agent activity across APIs, tools, and workflows. It continuously assesses security posture via iterative scanning andcontextual understanding of system architectures. | $12.7M / Seed / Apr 07, 2026 | ||
| Victory League is a profit-driven sports entertainment organization that uses mass-market events and media manipulation to benefit athletes financially. | $4M / Seed / Mar 25, 2024 | ||
| RiseUp is a purpose driven FinTech company making it easier for you to enjoy financial wellbeing. The one place where you can really understand how to spend and save money, giving you ‘financial coaching support’ that helps you make better financial decisions, and a vibrant community of tens of thousands of people where advice, help and learningsare celebrated to propel your growth! | $30M / Series B / Apr 12, 2022 | ||
| Academy is a London-based startup that trains talent and leadership roles for the UK tech industry. | $4M / Seed / Dec 17, 2021 | ||
| Wefarm is a farmer-to-farmer digital network that enables farmers to share information via SMS. The company allows small-scale farmers to connect with one another to solve problems, share ideas, and spread innovation. Utilizing the latest machine learning technology, Wefarm’s service works both online and over SMS.Since its founding in 2015,Wefarm has been named one of Africa’s Most Innovative Companies by FastCompany and has won Google’s Impact Challenge Award, TechCrunch’s Europas-Tech for Good Award, and the European Union Commission’s Ideas from Europe prize, among others. The company is headquartered in London with a field presence in Nairobi, Kampala, and Dar-es-Salaam. | $11M / Series A / Mar 09, 2021 | ||
| Radix is a developer of decentralized finance protocol designed to provide access, liquidity, and programmability to any asset. Their product protocol for building decentralized applications, tokens, and coins features a vertically integrated approach focused on making on- or off-ramping as simple as possible, along with functionality to create andaccess liquidity pools through an application programming interface, enabling clients to create, transfer, and store digital assets and applications. | $4.1M / Venture - Series Unknown / Jul 09, 2020 | ||
| Tiney are on a mission to reimagine at-home childcare & unlock the potential of every child. For parents, this means easy access to an exceptional and affordable childcare community that’s built around busy modern lives. For children, this means high quality and thoughtful play-based learning in safe settings that goes beyond nationalrequirements for early education. For childcare providers, this means allowing them to focus on the children in their care, relieving the burden of running a small business and ensuring maximum job satisfaction. | $6.5M / Seed / Feb 10, 2020 | ||
| Wefarm is a farmer-to-farmer digital network that enables farmers to share information via SMS. The company allows small-scale farmers to connect with one another to solve problems, share ideas, and spread innovation. Utilizing the latest machine learning technology, Wefarm’s service works both online and over SMS.Since its founding in 2015,Wefarm has been named one of Africa’s Most Innovative Companies by FastCompany and has won Google’s Impact Challenge Award, TechCrunch’s Europas-Tech for Good Award, and the European Union Commission’s Ideas from Europe prize, among others. The company is headquartered in London with a field presence in Nairobi, Kampala, and Dar-es-Salaam. | $13M / Series A / Oct 29, 2019 | ||
| Lunchclub is an AI superconnector that makes introductions for 1:1 lunch and coffee meetings. Vladimir Novakovski, Hayley Leibson, and Scott Wu founded it in 2018, with its headquarters in San Francisco in California. | $4M / Seed / Sep 18, 2019 | ||
| See all 66 investments → | |||
Co-Investors
About Index Ventures
Index Ventures is a venture capital company that provides investment capital and strategic support to early-stage and growth-stage technology enterprises across sectors such as software, fintech, healthcare, and consumer services. It engages with entrepreneurial teams to assess business models, support scaling efforts, and provide guidance through successive development phases. The company’s services include sourcing investment opportunities, conducting due diligence, structuring financing deals, and offering ongoing advisory interactions with portfolio founders. Index Ventures also maintains a network of industry relationships and resources aimed at facilitating connections between founders, investors, and market opportunities. Its focus spans from initial seed rounds through later financing stages to help portfolio companies pursue expansion and market entry efforts.
Index Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Georgia Stevenson
Partner
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Gerald Rimer
Team Member
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Hannah Seal
Principal/Partner
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Jan Hammer
Investor & Partner
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Julia Andre
Principal/Partner
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FAQ
What does Saul Klein invest in?
Saul Klein invests primarily in Software, Advertising and Internet startups, most often at Seed and Series B stage. Most of the 66 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 Saul Klein invest in?
Saul Klein typically joins rounds of $800k–$5M at Seed, $2M–$13M at Series A and $5M–$30M at Series B. These are whole funding-round sizes, not Saul Klein's own check, which is rarely disclosed: the 10th–90th percentile of the confirmed public funding rounds Saul Klein took part in.
How do I contact Saul Klein?
Public channels for Saul Klein include LinkedIn, X (Twitter) 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 Saul Klein last invest?
The most recent investment recorded for Saul Klein closed in Sep 2026. Shizune tracks 66 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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