Top 5 Email Startup Investors in Estonia in April 2025

Last updated: Apr 2025 A list of 5 angel investors and VC (Venture Capital) funds that invest in Email startups based in Estonia. We rank investors based on the number of investments they made in Email companies from Estonia. We update this investor list every month.

Top 5 Email Startup Investors in Estonia in April 2025

Investor	Email Estonia investments
Jaan Tallinn	3
Priit Kasesalu	2
Ahti Heinla	1
Cambridge Angels group	1
Sten Tamkivi	1

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Jaan Tallinn is the Co-Founder of the Centre for Study of Existential Risk and Future of Life Institute.

Investment focus

Software, Artificial Intelligence, Internet
Seed, Series A, Funding Round
United States, Estonia, United Kingdom

Portfolio highlights

Aerones — Robotic wind turbine service company offering maintenance, inspection and repairs worldwide. Reduce downtime and improve the efficiency of your wind park
Anthropic — An AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.
TENYX — Discover innovative solutions for digital transformation at Tenyx. Explore our cutting-edge technology services designed to drive business growth and elevate your digital presence.

Priit is heavily involved in assessing all of ASI's new technology investments.Before ASI, Priit played an integral role in developing Kazaa and later Skype; indeed, he continues to work at Skype as a core library developer.While cryptography and data communication are his areas of expertise, his other passion is computer gamedevelopment. Together with Ahti and Jaan, he wrote the first Estonian commercial computer game, Kosmonaut.When he isn't using his innate ability to solve complex technical problems, Priit enjoys good company, gourmet restaurants and biking.He holds a degree in automation and system technology from Tallinn University of Technology.

Investment focus

iOS, Apps, Email
Seed
Estonia

Portfolio highlights

Fleep — Fleep is a web, Android, iOS, Mac and Windows app that wants to bridge the gap between ‘reply all’-style group email and enterprise messaging/IM services.Founded by ex-Skypers, Fleep is a messaging service that fills the gap between email and various IM/texting services. They take email’s ability to contact anyone and marry it withreal-time messaging.They are based in Estonia, with offices in Tallinn and Tartu. Their services are hosted on Amazon EC2 in Dublin, Ireland.

Ahti is the CEO, CTO and co-founder in Starship Technologies, a startup that intends to disrupt last-mile delivery by introducing self-driving local delivery robots. He is also a co-owner in Ambient Sound Investments, a private investment vehicle launched by Estonian Skype co-founders.Ahti conducts technical reviews of all ASI's potentialinvestments. His experience and knowledge as a system architect is invaluable in assessing and managing ASI's portfolio companies.Ahti picked up programming at the early age of ten, his fascination with all things technical resulting in him being the lead technical architect at Skype. Ahti has also worked on artificial intelligence, 3D graphics engines, signal processing, and building mobile phones.Out of the office, Ahti dons his running gear to enjoy orienteering and adventure racing events, where navigation is his strong-point.

Investment focus

Internet, Project Management, Software
Seed, Angel, Series A
Estonia, United States

Portfolio highlights

Fleep — Fleep is a web, Android, iOS, Mac and Windows app that wants to bridge the gap between ‘reply all’-style group email and enterprise messaging/IM services.Founded by ex-Skypers, Fleep is a messaging service that fills the gap between email and various IM/texting services. They take email’s ability to contact anyone and marry it withreal-time messaging.They are based in Estonia, with offices in Tallinn and Tartu. Their services are hosted on Amazon EC2 in Dublin, Ireland.
LIFT99 — LIFT99 is a coworking hub and network of startup founders in Tallinn, Estonia, and Kyiv, Ukraine. In 2018, we launched our Skillsharing Platform for founders around the world.
Swap.com — Swap is an online consignment and thrift store shop high-quality secondhand clothes. Shop the best brands at up to 90% off.

The Cambridge Angels are a group of high-net worth investors who have proven experience as successful entrepreneurs in internet, software, technology and bio-technology. Members invest in and mentor high quality start-up and early-stage companies in these sectors in the Cambridge (UK) area and throughout the UK.Typical funding requirements thatthe Cambridge Angels meet are in the range of £50,000 to £500,000 - although it is worth noting that several of their portfolio companies have received more than £1m in funding from their Members over several funding rounds.Their Members have been responsible for a large number of the “Cambridge Phenomenon” success stories over recent years. Therefore, in addition to providing funding for early-stage companies, the Cambridge Angels also offer start-ups the considerable benefit of a wide range of expertise, contacts and directly relevant experience in establishing and growing entrepreneurial businesses successfully.

Investment focus

Software, Health Care, Biotechnology
Seed, Funding Round, Series A
United Kingdom, United States, Estonia

Portfolio highlights

illumion — Illumion develops high-throughput optical tools to accelerate battery material development
FLIT — FLIT specializes in the design and manufacturing of lightweight folding electric bikes (e-bikes) tailored for urban commuters.
Wilder Sensing — Wilder Sensing analyses audio and other data sources to produce actionable insights into the status and trends of biodiversity on your site.

Sten Tamkivi is the Chief Product Officer at Topia (formerly MOVE Guides). He was previously co-founder and CEO of Teleport (acquired by Topia), the place to scout for startup people. He co-founded the company as an EIR at Andreessen Horowitz.Sten has been a tech entrepreneur since 1996. After founding a few companies in Estonia, he joined Skypeas an early executive, ran the original R&D office, and held several global product leadership roles for 8+ years.He has an MS in Management from Stanford GSB.