Stockholm-based TERASi is a Swedish deep-tech company developing high-frequency wireless components and communications systems. The company originated from research at KTH Royal Institute of Technology and was founded in 2020. Its technology combines silicon micromachining and advanced packaging for high-frequency applications, initially targeting areas such as 6G, radar and test and measurement.
Its technology has subsequently developed towards compact wireless communications systems designed for environments where conventional communications infrastructure can be disrupted. The company is now working with a focus on secure, high-capacity connectivity for defence and other demanding environments.
This post covers:
- What TERASi does
- Its development from KTH research to commercialisation
- Private and public funding behind its growth
- What the September 2026 round shows for deep-tech entrepreneurs
The funding journey
TERASi received early backing from the KTH innovation ecosystem. KTH Holding invested in the company in 2022, following the development of its technology through KTH research and the company’s first pilot customer.
In 2023, TERASi completed a SEK 13 million capital increase, with participation from Navigare Ventures, Almi Invest, Onsight Ventures, DeepTech Labs and existing investors. Almi Invest contributed SEK 4 million. The financing was intended to launch products, expand the team, strengthen the patent portfolio and develop manufacturing infrastructure.
Public support has also formed part of the journey. Through the Eurostars project EU-band, Vinnova awarded TERASi SEK 5 million for a project running from October 2025 to September 2027 to develop and test a D-band radio system for high-capacity communications and sensing in 6G.
The major milestone arrived on 22 September 2026, when TERASi announced an €11 million seed round co-led by the NATO Innovation Fund and JOIN Capital. New investors included In-Q-Tel and Ukrainian D3 Venture Capital, while previous investors including Navigare Ventures, Almi Invest, Onsight Ventures, Further Than Capital and KTH Ventures also participated.
The capital will be used to scale deployment with European armed forces, develop new products and build capabilities for the tactical edge.
What TERASi’s funding journey shows
TERASi demonstrates a common deep-tech pathway: research first, early commercial validation next, and larger strategic financing once the technology has a clearer market application.
Its journey also illustrates how public and private funding can complement each other. University-linked investment and early venture capital supported the transition from research to company building. Public innovation funding supported technology development, while the September 2026 round brought in investors with strong defence and national-security interests.
For entrepreneurs commercialising research, the lesson is that the funding ecosystem can extend beyond traditional startup investors. Universities, public innovation agencies, specialist deep-tech funds and strategic investors may each become relevant at different stages.
The September 2026 round also shows how a technology can evolve commercially. TERASi began with high-frequency components and 6G applications and has developed a stronger focus on resilient communications for defence and critical environments. That evolution can help a deep-tech company connect its underlying technology with a clearly defined market need.
Entrepreneurs developing research-based technologies can explore the Fundingtrip courses to learn how to structure a funding strategy and identify appropriate financing opportunities.
About the author of this post
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Sara Gavidia
Content Creator
Communications Manager & Content creator
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Hello! I’m Sara 👋🏻
I’m FundingTrip’s Content creator. I write posts about technology, funding and innovation. If you liked this one, subscribe to our newsletter to receive more updates!
Post reviewed by David Arias, funding expert.
