About us

An early-stage investor turning Central Eastern European talent into world-class success stories

Who we are


As an early-stage technology investor, managing privately financed funds, we seek to find and join the most exciting Central Eastern European teams on their global mission. We are proud of our team and portfolio turning value creation and category-defining innovation into reality. We are not only a partner, but a dedicated peer, building the Day One family on mutual trust, great synergies and on our extended international network. Our goal is to sustainably enlarge our portfolio along these fundamentals, while never giving up on our hands-on approach.
Scroll down to meet our team and read more about what we do and how we do it.

Meet our Team


Elek Straub

managing partner, chairman of the board

Former head of Magyar Telekom Group and general manager of IBM Hungary. Elek has been an advisor, private investor and angel investor as well.

Full Bio

Elek Straub

Elek has been one of the most active individual angel investors in Hungary. His industry knowledge, experience and personality are among the strongest assets of our Fund. From 1995 to 2006, Elek was the head of the Magyar Telekom Group (Matáv Group), the leading provider of fixed and mobile telecommunications and Internet services in Hungary and other countries in the region. Throughout his 11 years tenure he has overseen multiple rounds of the company’s privatization, it’s IPO at the Budapest and New York Stock Exchange, introduction of state-of-the-art telecommunications technologies and the start of its international expansion. Before joining Magyar Telekom, Elek was the country general manager of IBM Hungary.

György Simó

managing partner

Best known in the IT-focused angel investor community. Former co-founder of Origo.hu and CEO of T-Online Hungary. Solid expertise in supporting entrepreneurs.

Full Bio

György Simó

György is one of Hungary’s best known faces in the IT-focused angel investor community. He brings invaluable local market knowledge and investor experience to our Fund. György started his career as a journalist and joined the Magyar Telekom Group in 1998 where he led the establishment of Hungary’s market leader Internet portal [origo]. From 2003 György was the CEO of T-Online Hungary and held executive positions at Magyar Telekom where he was responsible for new media company acquisitions, new business development in media, e-commerce and data management services lines and the establishment of the company’s innovation center, Kitchen Budapest. From 2008 he was COO of the Alternative Businesses and Corporate Development Business Unit of the leading Hungarian telecommunications company where he gained solid expertise in supporting entrepreneurs to build and grow their businesses.

Csaba Kákosy

managing partner, CEO

Energy, transport and telecommunications - key experiences in Csaba's life. 12 years of regulatory and financial experience, former Minister of Economy.

Full Bio

Csaba Kákosy

Csaba brings over 12 years regulatory and financial experience, a strategic mindset and an extensive international network to our Fund. Csaba was a regulatory expert in the Hungarian banking sector representing the Hungarian central bank at the Permanent Mission of Hungary to the OECD in Paris for 5 years. In 2004 Csaba moved to become chief of staff at the Ministry of Economy and Transport where he played a key role in its operations and rationalization. In 2007 he became Minister of Economy and Transport in Hungary where he served until the break-up of the coalition in 2008. Since then, Csaba has been a Founding Partner at Reservoir Strategies, a strategy consulting firm with a strong focus on the energy, transport and telecommunications industries.

Aurél Pásztor

principal

Studied and worked in Japan as an economist. Aurel has a great experience in international private equity transactions. He worked with leading Private Equity houses.

Full Bio

Aurél Pásztor

Aurel’s business analysis skills and extensive exposure to international private equity transactions help the Fund appropriately valuate businesses. Aurel has studied Economics and Sociology in Hungary and Japan and earned his BA from Hitotsubashi University in Tokyo. In 2007 he joined L.E.K. Consulting, a global strategy and management consulting firm, in Tokyo as an Associate, and from 2010 worked as an Associate Consultant at the firm’s Munich office. Aurel has worked closely with leading global PE houses as well as medical technology and retail companies on due diligence projects, market entry and business unit strategy assignments from both the commercial and vendor side.

Éva Réz

principal

Having gained experience in the Silicon Valley, Éva joined Day One in 2014. Previously, she worked on shaping the Hungarian capital market as a Business Development Analyst of the Budapest Stock Exchange.

Full Bio

Éva Réz

Eva joined Day One Capital team as an investment director in May 2014 after gaining experience in the Silicon Valley startup buzz over almost a year. She graduated from the Corvinus University of Budapest as an investment analyst. She was actively involved in the development of the Hungarian capital market while working at the Budapest Stock Exchange. Over the five years she spent there, not only did she support management decisions with strategic analysis, but she also contributed to development of the financial literacy by giving presentations and organizing other educational events. She spent almost a year in San Francisco due to a Fulbright scholarship, where she studied at Golden Gate University, while she also worked as a volunteer at Keiretsu Forum, a global angel investor community.

Luca Keresztesi

principal

Luca has been part of the team since 2012. Studied at Harvard University, Luca was previously the global director of AIESEC, analyst at PwC and worked on sales at Procter&Gamble.

Full Bio

Luca Keresztesi

​​Luca joined Day One Capital in 2012 and since then has gained substantial experience in conducting company evaluation, due diligence, investment process preparation and portfolio management. She focuses on investments in software / SaaS, financial services and consumer internet companies. She studied Finances at Harvard, and holds a BA in Applied Economics and an MA in Organizational Management from Corvinus University of Budapest. Luca cut her teeth quickly learning all the basics of management and business development during her time as a country manager and global director at AIESEC, the biggest youth-run international organization of the world. She gained diverse experiences working as an analyst at the Advisory line of PwC, and working on sales at Procter&Gamble Hungary and Central-Eastern Europe. Luca was selected in 2013 to be a member of the Global Shapers Community of the World Economic Forum.

Edit Gulácsi

office manager

Spent 5 years in retail fashion and 5 years in family business. She's been the operational support member of Day One since 2016.

Full Bio

Edit Gulácsi

Edit is an economist by education. She worked five years in retail, managed stores of premium and high-end fashion brands. For another five years she dealt with back office activities for family business and her own venture. In 2016, Edit joined the Day One Capital team as operational support for the team’s success.

Elek Straub

managing partner, chairman of the board

Former head of Magyar Telekom Group and general manager of IBM Hungary. Elek has been an advisor, private investor and angel investor as well.

György Simó

managing partner

Best known in the IT-focused angel investor community. Former co-founder of Origo.hu and CEO of T-Online Hungary. Solid expertise in supporting entrepreneurs.

Csaba Kákosy

managing partner, CEO

Energy, transport and telecommunications - key experiences in Csaba's life. 12 years of regulatory and financial experience, former Minister of Economy.

Full Bio

Elek Straub

Elek has been one of the most active individual angel investors in Hungary. His industry knowledge, experience and personality are among the strongest assets of our Fund. From 1995 to 2006, Elek was the head of the Magyar Telekom Group (Matáv Group), the leading provider of fixed and mobile telecommunications and Internet services in Hungary and other countries in the region. Throughout his 11 years tenure he has overseen multiple rounds of the company’s privatization, it’s IPO at the Budapest and New York Stock Exchange, introduction of state-of-the-art telecommunications technologies and the start of its international expansion. Before joining Magyar Telekom, Elek was the country general manager of IBM Hungary.

Full Bio

György Simó

György is one of Hungary’s best known faces in the IT-focused angel investor community. He brings invaluable local market knowledge and investor experience to our Fund. György started his career as a journalist and joined the Magyar Telekom Group in 1998 where he led the establishment of Hungary’s market leader Internet portal [origo]. From 2003 György was the CEO of T-Online Hungary and held executive positions at Magyar Telekom where he was responsible for new media company acquisitions, new business development in media, e-commerce and data management services lines and the establishment of the company’s innovation center, Kitchen Budapest. From 2008 he was COO of the Alternative Businesses and Corporate Development Business Unit of the leading Hungarian telecommunications company where he gained solid expertise in supporting entrepreneurs to build and grow their businesses.

Full Bio

Csaba Kákosy

Csaba brings over 12 years regulatory and financial experience, a strategic mindset and an extensive international network to our Fund. Csaba was a regulatory expert in the Hungarian banking sector representing the Hungarian central bank at the Permanent Mission of Hungary to the OECD in Paris for 5 years. In 2004 Csaba moved to become chief of staff at the Ministry of Economy and Transport where he played a key role in its operations and rationalization. In 2007 he became Minister of Economy and Transport in Hungary where he served until the break-up of the coalition in 2008. Since then, Csaba has been a Founding Partner at Reservoir Strategies, a strategy consulting firm with a strong focus on the energy, transport and telecommunications industries.

Aurél Pásztor

principal

Studied and worked in Japan as an economist. Aurel has a great experience in international private equity transactions. He worked with leading Private Equity houses.

Éva Réz

principal

Having gained experience in the Silicon Valley, Éva joined Day One in 2014. Previously, she worked on shaping the Hungarian capital market as a Business Development Analyst of the Budapest Stock Exchange.

Luca Keresztesi

principal

Luca has been part of the team since 2012. Studied at Harvard University, Luca was previously the global director of AIESEC, analyst at PwC and worked on sales at Procter&Gamble.

Edit Gulácsi

office manager

Spent 5 years in retail fashion and 5 years in family business. She's been the operational support member of Day One since 2016.

Full Bio

Aurél Pásztor

Aurel’s business analysis skills and extensive exposure to international private equity transactions help the Fund appropriately valuate businesses. Aurel has studied Economics and Sociology in Hungary and Japan and earned his BA from Hitotsubashi University in Tokyo. In 2007 he joined L.E.K. Consulting, a global strategy and management consulting firm, in Tokyo as an Associate, and from 2010 worked as an Associate Consultant at the firm’s Munich office. Aurel has worked closely with leading global PE houses as well as medical technology and retail companies on due diligence projects, market entry and business unit strategy assignments from both the commercial and vendor side.

Full Bio

Éva Réz

Eva joined Day One Capital team as an investment director in May 2014 after gaining experience in the Silicon Valley startup buzz over almost a year. She graduated from the Corvinus University of Budapest as an investment analyst. She was actively involved in the development of the Hungarian capital market while working at the Budapest Stock Exchange. Over the five years she spent there, not only did she support management decisions with strategic analysis, but she also contributed to development of the financial literacy by giving presentations and organizing other educational events. She spent almost a year in San Francisco due to a Fulbright scholarship, where she studied at Golden Gate University, while she also worked as a volunteer at Keiretsu Forum, a global angel investor community.

Full Bio

Luca Keresztesi

​​Luca joined Day One Capital in 2012 and since then has gained substantial experience in conducting company evaluation, due diligence, investment process preparation and portfolio management. She focuses on investments in software / SaaS, financial services and consumer internet companies. She studied Finances at Harvard, and holds a BA in Applied Economics and an MA in Organizational Management from Corvinus University of Budapest. Luca cut her teeth quickly learning all the basics of management and business development during her time as a country manager and global director at AIESEC, the biggest youth-run international organization of the world. She gained diverse experiences working as an analyst at the Advisory line of PwC, and working on sales at Procter&Gamble Hungary and Central-Eastern Europe. Luca was selected in 2013 to be a member of the Global Shapers Community of the World Economic Forum.

Full Bio

Edit Gulácsi

Edit is an economist by education. She worked five years in retail, managed stores of premium and high-end fashion brands. For another five years she dealt with back office activities for family business and her own venture. In 2016, Edit joined the Day One Capital team as operational support for the team’s success.

We are especially interested in the following industries


Autonomous Driving


Financial Technology


Big Data


Cloud computing

Medical Technology


Robotics and Software




How does the investment process work?


First step

Write your business summary. Define clearly your product, your market and your customers. Give your growth performance and KPIs. Show us that your team is the best all around the globe to execute this project.

Second step

Time for evaulation. Meeting, analyzing and validating: these are the following steps. Based on facts, we are looking for your legitimate assumptions and execution plan.

Third step

We understand that time is against startups and we do our best to ask our questions straight and fast. At some point we will run out of questions and then we make a decision. If we are both impressed with each other, we sign the deal and we take you to the next level!

ARE YOU READY FOR THE NEXT STEP?

Schedule a meeting