01
BESS & Energy
Battery storage, grid stability and the infrastructure behind the energy transition – a market that is only just gaining momentum.
Strategy & Growth
Advisor
Founder · Investor · Strategy Partner
Founder, investor and operating partner for what comes next.
I partner with companies on strategy, growth and operations – as an investor, co-founder and advisor. Active in energy, digital finance and commerce, wherever technology unlocks new business models.
Available for investments, consulting & speaking
Focus areas
Three fields where I love to build.
Sometimes as an investor, sometimes as a strategy partner, sometimes as a co-founder – wherever I bring the most leverage.
02
Finance & Crypto Assets
Digital assets, tokenization and new financial infrastructure. Close to both the technology and the market since 2015.
Founder
Advisor
03
E-Commerce & Social Live Commerce
Brands, reach and live shopping as the next stage of retail – where content and commerce converge.
Co-Founder
Go-to-Market & Scaling
How I work
Agentic first. Across every field.
Every company I am involved in follows the same rule: before a process gets a new hire, we first check whether an AI agent can run it reliably. Reporting, research and routine work run on autopilot, so teams spend their time on strategy and client relationships. Decisions are still made by people.
Agentic development
New products and internal tooling are built for agent workflows from day one – not retrofitted later.
Automation
Accounting, reporting and data upkeep run without manual effort – in every company, at every stage.
People at the center
Every automation has an owner. It doesn't replace decisions – it accelerates them.
Twenty years of entrepreneurship in one sentence:
“Success doesn't punch a clock.”
Dennis Weidner, Founder & Investor
Current ventures
Companies I founded or actively help shape.
Consulting & investments for founders and companies – strategy, growth and operations.
Visit website →
One of the highest-reach crypto media brands in the German-speaking market.
Visit website →
Startup platform covering tools, funding, grants and relocation for founders.
Visit website →
The AgenticsAgentically built venture builder: small teams and AI agents create new companies faster, more cost-efficiently and systematically – from idea to scale, including Slabhit.
Visit website →
SlabhitLive-commerce platform for auctions and creator-driven retail – built to scale internationally.
Visit website →Want to get involved in one of these ventures? Tell me where you can contribute →
Investments built on collaboration.
Through Weidner Ventures GmbH I invest selectively in companies where I can contribute more than capital. In most cases I take on clearly defined growth and strategy work and receive equity in return – a partnership model that creates real operational value.
Visit website →About me
I build companies that last.
For more than 20 years I have helped shape companies across energy, digital finance and commerce. As an advisor, co-founder and operating partner I focus on resilient business models and strong partnerships that grow and endure for years. And I apply new technology hands-on myself – so the experience I bring is practical, not theoretical.
01
Think long-term
I back business models designed to grow and carry weight for years.
02
Stay hands-on
Strategy that works in day-to-day operations and shows visible impact.
03
Connect people
Bringing the right people together is often half the battle won.
Strategy
Growth
Sales & Operations
BESS & Energy
Finance & Crypto Assets
E-Commerce
Agentic First
Automation
Strategy
Growth
Sales & Operations
BESS & Energy
Finance & Crypto Assets
E-Commerce
Agentic First
Automation
References
What partners say about working together.
“
Always on the pulse of current trends, with a remarkable personal network across the tech scene. A clear recommendation for working together.
SX
Partner from the tech network
Met at SXSW, Austin
“
Very fast responses and valuable, well-founded input. You can tell there is genuine understanding of digital business models and platforms.
DG
Founder & project partner
Digital business models
“
Competent, open and reliable. Bold and innovative on new topics – with ideas, spirit and, above all, measurable results.
WB
Long-standing client
Web3 & performance marketing
“
A genuinely creative circle of market experts with deep understanding of platform business and digital models. Always a pleasure.
PL
Platform business partner
Digital platforms
“
We received comprehensive, fast advice – from strategy through to execution. Everything worked beautifully.
IM
Implementation client
Advisory & execution
“
Solid, bold and innovative – a true first mover. Great ideas, great spirit and, above all, great results.
FM
Fellow founder
Startups & innovation
Contact
The next step starts with a message.
Whether it's an investment, advisory work, a speaking request or press – I look forward to your message and reply personally.
Prefer to talk right away? Book a 15-minute call →
Or connect on LinkedIn