Impossible Founders Sprint Logo Impossible Founders Sprint Logo

Learn how to build a startup in just 48 hours - from December 12 - 14, 2025! Test your own idea or work on other ideas, receive expert mentorship and pitch in front of an expert jury on Sunday! Food, drinks, fun, and a great experience included. 🚀

What is the Impossible Founders Sprint?

The Impossible Founders Sprint is a 3-day intensive workshop where you'll develop a viable business model from a mere idea in just 48 hours. Experienced mentors from the startup scene will coach and support you, and successful founders will provide valuable insights as speakers. You'll then pitch your developed business model to a select jury and potential investors. The best concepts will be awarded. Join us and seize this opportunity!

Who can join?

Startup enthusiasts, students, non-students, developers, designers, business developers, marketing gurus, engineers, nutritionists, innovators, investors... In short: anyone who is keen on startups, looking for a challenge, and is motivated and committed to developing a business model from an idea in a short amount of time.

Do I need to pitch my own idea?

No, you don't have to reveal your idea if you don't want to. However, you might miss a great opportunity, and someone else might pitch your exact idea, or a very similar one, at another Startup Weekend, and it wins, leaving you out of luck. Don't chase after developments. Be bold, act entrepreneurially... and of course, as a participant, you can also join a team around another participant's idea.

Mission

Our mission is to provide a fun environment where everyone can test ideas and experiment with entrepreneurship.
We enable participants to test ideas, build prototypes, and validate real solutions - supported by experienced mentors and a community driven by curiosity and action.

Agenda

Time is running...


until doors open

Friday, December 12, 2025

16:00
Registration / Finger Food / Networking
16:45
Opening Ceremony
17:00
Kickoff Keynote
17:30
Idea Fire Pitches
18:15
Voting / Teambuilding
19:00
Kickoff - let's get started!
19:30
Work on your ideas + Mentoring

Saturday, December 13, 2025

08:30
Breakfast AMA with experienced founder
09:15
#INPUT Marketing-Workshop with Jung von Matt START
10:00
Work on your ideas + Mentoring
12:00
Lunch
13:00
#INPUT Workshop "How to win investors" with Heidrun
14:00
Work on your ideas + Mentoring
17:00
#INPUT Legal Workshop with Constanze (Lutz | Abel)
18:00
Pizza + Beer đŸ•đŸ»
19:00
Work on your ideas

Sunday, December 14, 2025

08:30
Breakfast AMA with experienced founder
09:30
#INPUT Pitch Workshop with Ralf Leister
10:00
Work on your ideas
12:00
Lunch
13:00
Work on your ideas & pitch trials
14:45
Meet the Judges
15:00
Keynote
15:15
Final jury pitches
17:30
Break
18:00
Award Ceremony
18:15
Closing Ceremony
18:30
Dinner + Post-Event Hangout

Location

University of Hamburg

The Impossible Founders Sprint will take place at the University of Hamburg!

Address

Von-Melle-Park 9
20146 Hamburg

How to get there?

S2 or S5 Dammtor
U1 Stephansplatz
Bus lines 4, 5, 112 Staatsbibliothek

Which building?

If you stand in the middle of the campus, we're in the building with the graffiti on the wall (the oneright of the "Wiwi-Bunker")

Who should I call if I'm lost?

Just call Andreas at +49 178 714 5167 and we'll pick you up

People

Mentors / Speakers / Jury

The following mentors, speakers, and jury members will support us. More to be announced soon!

Raoul Haschke

Raoul Haschke

Head of hei_INNOVATION at University of Heidelberg

Event moderator

Raoul is a certified innovation and project manager with over 12 years of experience. He teaches entrepreneurship at Heidelberg University, leads their innovation transfer agency, and supports various institutions in developing their entrepreneurial strategies. Raoul is also a part of NEXTGN (Baden-WĂŒrttemberg's startup factory) and an experienced host of ideation events such as Techstar's Startup Weekend.

Prof. Dr. Jetta Frost

Vice President, University of Hamburg

Jury Member

As the Vice President of the University of Hamburg, Jetta is responsible for establishing and further developing knowledge exchange as the University’s third key performance area. She also oversees the strategic development of academic staff and academic career planning with a special focus on equal opportunity to promote gender fairness, diversity, and family-friendliness.

Dr. Arik Willner

CEO, Impossible Founders

Jury Member

Before becoming the CEO of Impossible Founders, Arik was the CTO of DESY, Hamburg's leading scientific research organisation. He is a trained physicist and an expert in turning scientific ideas into real companies. As a jury member, he will use his structured scientific approach to judge the teams objectively.

Heidrun Twesten

CEO Impacct GmbH, Lead @ encourageventures

Jury Member

Heidrun (MBA) is an entrepreneur and capital markets expert. She has built two companies, consulted 20+ IPOs, is an investor (angel/VC) and executive advisor to SMEs and scaleups. As a jury member, she will use her investor’s experience to assess the ideas’ financing potential.

Constanze Hachmann

Lawyer, Lutz | Abel

Workshop Host

Constanze is a lawyer for Lutz | Abel, specializing on commercial and corporate law. She and her colleague Lorenz Jellinghaus are well-known and highly respected lawyers in Hamburg's startup ecosystem and have consulted countless startups, investors and corporates. There are probably not many people in Hamburg who have been part in more startup funding rounds. In her workshop, Constanze will share insights into the most important legal aspects for startup founders and how to avoid common pitfalls.

Ralf Leister

Moderator, Pitch Trainer

Workshop Host

Ralf is an experienced event moderator, lecturer, and pitch trainer who is passionate about engaging and interesting live presentations. In his workshop, he will teach you his top 10 pieces of advice how to perform on stage as a founder - and to convince investors.

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Priyanka Shah

Program Manager, Impossible Founders

Mentor, Event Organizer

Priyanka has led and scaled a deep-tech business, working closely with engineers, researchers, and teams building complex technology. As a mentor, she supports founders with clarity, practical problem-solving, and a builder’s perspective that understands both ambition and execution.

Andreas Kitzing

Entrepreneur in Residence, Impossible Founders

Mentor, Event Organizer

Andreas is a serial entrepreneur who has founded several startups, successfully sold some, and failed with others. He can support you with the view of a founder who has more than 20 years of startup experience. He also picked up some basic business skills during his MBA at the University of Cambridge.

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Miriam Bundel

Founder, UX & design expert, book author

Mentor

Miriam is a creative multi-talent who has founded several organizations. She is the author of the book "Startup mit Plan and a trained graphics designer and UX expert. As a mentor and advisor, she has worked with startups as well as with corporates like Sparkasse, bonprix or Lufthansa.

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Christine Tiedemann

Head of Startup Port Network

Mentor

If you are thinking of founding a startup out of one of Hamburg's universities, you will probably get in touch with Christine and her team. As the head of Startup Port, she and her team are coordinating startup activities across the universities and are consulting the students on any questions about entrepreneurship.

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Nils Neumann

Head of Founder Support at TU Tech Innovation

Mentor

Nils is one of the veterans of supporting founders in Hamburg's startup ecosystem. He has been with TU Tech - the transfer organisation of TU Hamburg - since 1998 and has supported hundreds of founders on turning their scientific research into a real startup.

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Partners

Our partners

More to come...

Get Tickets

The ticket registration is now open via our ticketing partner ChefTreff. Regular tickets will be €49,00 for the entire event (food & drinks included). #freibier

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