Challenger Sustainability is a 3-month acceleration program for early-stage Ukrainian startups in green tech and related sectors, focused on growth, product development, and investment attraction — followed by post-acceleration support, including EU client matchmaking and a study visit to Sweden with participation in Tech Arena. Join us!

Challenger Digital & Green is an equity-free acceleration program empowering startups driving sustainable, circular, and digital innovation in Southern and Eastern Africa — shaping a more inclusive, climate-resilient future.

Digital mentor for building a startup step by step. Want to start an innovative project? We will show you what steps are important for you, what mistakes you should avoid and how to attract investors. [This app is in Slovak language]

A 3-month program for Slovak doctoral students and researchers, aimed at making scientific research applicable to broader communities through knowledge transfer and commercialization.

The CASSINI Business Accelerator is a 6-month program offering top-level coaching, training, events, and funding to help space start-ups and scale-ups achieve sustained commercial growth in both upstream and downstream markets.

Challenger Accelerator 4.0 is complete. If you’ve built an MVP product in EdTech, HealthTech, or AI and want to raise funding and level up your solution, apply via the link! We’ll contact you when the next Challenger batch launches.