Impact investing. Decentralized.

Blockchain has blessed green-tech developers with the tools for success. We provide exposure to these cutting-edge assets via traditional banking onramps.

Product Overview

Blockchain is being repurposed to save the planet.

There is a nascent market brewing, and it's poised to erupt. While the media stays fixated on moonshots and popular tokens, new projects have been delivering measurable impact on society and the environment. A new crop of companies are developing the infrastructure for this budding economy.

Planet-friendly crypto profits. Made easy.

Profitable investment opportunities abound in this space right now. Yet most traditional investors are locked out due to the technical barriers around crypto. We're providing a gateway for fiat investors to participate in blockchain technologies.

Sphere is an Actively Managed Certificate. AMCs are bankable securities that can be purchased via Swiss ISIN.

This is how we invest.

We invest in protocols issued by blockchain-based businesses with positive global impact.

Carbon Markets

Blockchain is bringing valuable accountability to the carbon offset market. Sphere invests in projects that address:

  • Carbon Credits Value Chain
  • Carbon Offsetting
  • Marketplaces & Exchanges

Renewable Energy

Organizations built on renewables are seeing record growth. We believe the future includes:

  • Distributed Renewable Energy Certificates
  • Virtual Power Plants
  • Energy Efficiency
  • Marketplaces & Exchanges

Other Impact Solutions

Making the world a better place doesn't stop with energy. We also invest in:

  • Supply Chain
  • Provenance & Traceability
  • Verification & Authentication
  • Connectivity Insurance

This is who we are.

A team of industry leaders with decades of experience in finance, blockchain, and impact investing.

Stefan Rust

Stefan Rust

Founder, Managing Director

Previously CEO of, Stefan Rust is a multilingual mover and shaker turning cutting-edge technology into commercial success. He’s currently the founder of Sonic Capital and an advisor to blockchain projects including Nodle, Hypha DFO/SEEDS, Polymarket and CycleBit. Navigating regulations competing against the national telecom operator, Stefan helped change the mobile landscape in China. He then moved on to Sun Microsystems where he worked to create an ecosystem that brought content and apps to mobile with Java. He has also advised tech giants like Qualcomm, Red Hat, Sony, Siemens, Limelight Studios, and many others.

Alyssa Aaron, CFA

Alyssa Aaron, CFA

Co-founder, Partner

Ayssa has more than a decade of financial and investment experience across Venture Capital, Private Equity and Corporate Innovation. She is currently a Partner in Sonic Capital and has held senior positions with blockchain projects such as BCH. Prior to this, she was Director of Investments at and has held investment and analyst positions at major institutions, including Bank of America Merrill Lynch and Conversus Capital. Alyssa is a CFA® charterholder.

Dr. Bernhard Vogeli

Dr. Bernhard Vogeli

Managing Partner

Bernhard is the co-founder of Tavis Digital and its sister company Tavis Capital AG. As Managing Partner, he oversees the operation, strategy and product development of Tavis Digital. Bernhard has a strong academic background and worked as a physicist in Switzerland, Japan and the USA for many years, including in private equity-financed start-up companies. Bernhard holds a PhD in Physics from ETH Zurich and an MBA from William E. Simon School, University of Rochester. He is a CAIA Charterholder.

Christian Speckhardt

Christian Speckhardt


Christian supports strategy, business development and investment product projects at Tavis Digital. Christian has a strong background in institutional asset management, banking and finance, ESG and impact investing. He was previously the CIO and deputy CEO of responsAbility Investments -- a CHF 3.5bn AuM asset manager focused on impact investments. Christian advises the Swiss government on the design and launch of an impact finance platform and serves as a member of the Swiss National UN FAO Committee. Christian holds a degree in Economics and an MBA from the University of Zurich, Switzerland. He’s a guest lecturer at the University of St. Gallen (HSG) and the University of Lucerne (IFZ).

It's time to take action.

It's well past time to start saving our planet for coming generations. Thanks to this blossoming technology, we can start turning things around—while turning a profit.

Product Overview


Please read and agree to the following terms before proceeding.

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By clicking on the "I Confirm" button below you confirm and acknowledge:

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Further, you acknowledge that the Product will not be registered for public distribution in Hong Kong and may not be publicly offered in Hong Kong. You represent and warrant to Sonic Capital that you will not take any actions or omit to take any actions which may require the shares of the Product or any offering of such shares to become registered for sale under the laws of Hong Kong or any other jurisdiction.

You acknowledge the Product has not been authorized as a collective investment scheme by the Hong Kong Securities and Futures Commission ("SFC") pursuant to section 104 of the Securities and Futures Ordinance ("SFO"), nor have the relevant offering documents been approved by the SFC or registered with the Hong Kong Registrar of Companies. Accordingly, the shares may not be offered or sold in Hong Kong other than to persons who qualify as professional investors as defined under SFO and its subsidiary legislations (each a "Professional Investor"). No person may issue, circulate or distribute, or have in its possession for the purposes of issue, circulation or distribution, any document relating to the securities whether in Hong Kong or elsewhere, which is directed at, or the contents of which are likely to be read by, the public in Hong Kong (except if permitted to do so under the securities laws of Hong Kong) other than with respect to the securities which are or are intended to be disposed of only to persons outside Hong Kong or only to Professional Investors.

Without prejudice to the foregoing, you represent and warrant to Sonic Capital that you will not promote or market the Product to any resident and/or citizen of Hong Kong unless such promotion and marketing is made in compliance with the applicable laws of Hong Kong and any other applicable rules and regulations related to the promotion of financial products or services in the relevant country.