Karel Tušek
CTO @ Springtide Ventures
Prague, Czech Republic
Karel Tušek is a seed investor at Springtide Ventures in Prague focused on Cyber Security and Software. Karel Tušek is based out of Prague and is the Managing Partner and Co-Founder of Tachles VC. Karel previously worked at Crystal Web Limited as a Co-Founder. Karel Tušek attended Charles University.
- Total investments:
- 2
- Last investment:
- Lead investor:
- 100%
Last updated:
For AI agents: llms.txt
Industries Karel Tušek invests in
Stages Karel Tušek invests in
Countries Karel Tušek invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
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Investment Focus
Industry
- Cyber Security 2 (100%)
- Software 1 (50%)
- Artificial Intelligence 1 (50%)
Stage
- Seed 1 (50%)
- Series B 1 (50%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| In an industry focused on detection, Source Defense provides websites with the first ever prevention technology for attacks of third-party origin. We are the first ever SAAS platform that allows a site owner to set and enforce permissions, receive real-time alerts and monitor third-party vendors' behavior on their site. By removing thesecurity considerations from third-party integrations, we can save countless man-hours spent on tests and integrations, allowing sites to focus on generating revenues and new opportunities while keeping the site visitors safe and the site in high performance. | $27M / Series B / Apr 26, 2022 | ||
| Cognni is zero-effort information intelligence that adds meaning to any piece of information created, downloaded, accessed, or shared.Cognni makes an InfoSec think like a human, so the user can focus on the bigger picture, keeping the information flow safe. The company was previously known as Shieldox that was founded in 2017 and based in TelAviv, Israel. | $3M / Seed / Aug 15, 2021 |
Co-Investors
About Springtide Ventures
Springtide Ventures is a venture capital company that helps to bring start-ups to life, materialize their visions, and global ambitions. It has a relentless drive for success, overcoming challenges and learning while, above all, preserving its integrity and sticking rigorously to ethical norms. Naturally, they value such qualities in entrepreneursand teams we support as they take on the challenges of building their next enterprise.The company was founded in 2013 and is based in Prague, Czech Republic.
Springtide Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
|
Karel Tušek
CTO
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Nick Lazares
Venture Partner
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FAQ
What does Karel Tušek invest in?
Karel Tušek invests primarily in Cyber Security, Software and Artificial Intelligence startups, most often at Seed and Series B stage. Most of the 2 investments tracked by Shizune back companies in Israel. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Karel Tušek?
Public channels for Karel Tušek 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 Karel Tušek last invest?
The most recent investment recorded for Karel Tušek closed in Apr 2022. Shizune tracks 2 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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