Slush Helsinki. Contact Us. Slush spotlights the most ambitious startups from all over the world, connecting them with leading investors, tech companies and industry tycoons, mentors, media and talent. Our startup track is tailored for young, often tech-driven, companies aiming for rapid growth with a scalable business model. You can already start discovering all registered Slush visitors in Matchmaking. Slush Helsinki is the largest gathering of venture capital in the world, attracting 2, key investors searching for the next breakout company. Last year more than 10, pre-booked investor-startup meetings took place at the event.