Seed Phase Startups

The L-Booster

25.000€ for startups to turn traction into scale

The L-Booster Accelerator

The L-Booster is a growth program by southwestX. Selected startups receive 25.000€ in return for participation in our program and sharing the sales and fundraising data generated in the program for research purposes. Additionally, teams receive focused support to accelerate market access, revenue and scaling. For startups ready to grow. For teams building at scale. For ambitious founders.

0 k

for your Startup

up to 0

participants per year

weeks program duration

What's on

Who should apply?

You are an early-stage startup (ideally incorporated within the last 12-24 months)

You’ve taken your first steps from concept to execution and are actively shaping your company’s direction.

You are building a scalable business model with early traction

You’re testing your value proposition with real customers and learning from early market feedback.

Your startup considers aspects of sustainability within its business model

You’re embedding sustainability into your processes while preparing your business for long-term growth.

Startups in Deep Tech and/or AI are encouraged to apply

You’re developing technology-driven solutions with the potential to disrupt established markets.

Typical stage: Pre-Seed to early Seed

What do selected teams receive?

-> €25,000 for participation in the sales and/or fundraising oriented program and sharing your data and findings for our research project. -> Sales-oriented support by the southwestX team -> Dedicated sustainability training in cooperation with the European Academy

How does selection work?

-> Apply with your pitchdeck -> Pre-selection -> finalists pitch online (15min pitch, 15min Q&A) in front of a jury.

Application deadlines

Next: 31. July 2026 Next deadlines: quarterly at the end of each quarter.

The L-Booster is made possible through the support of the Loose-Family Office. Their contribution enables founders to focus on building, scaling and creating real impact. Beyond the direct program benefits, selected teams benefit from access to a broad national and international network, entrepreneurial experience, strategic sparring and hands-on support where it creates real value.

The L-Familiy Office Website

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Ready to take the next step?

Secure your spot for the L-Booster 2026 now.

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