Stockholm, Sweden · Angel InvestorNiklas Zennstrom is a Swedish-born serial entrepreneur and investor, best known as the co-founder of Skype and Kazaa. After selling Skype to eBay for USD 2.6B in 2005, Zennstrom founded Atomico (listed separately as VC), one of Europe's most prominent growth-stage venture funds. Beyond Atomico, Zennstrom makes personal angel investments in early-stage European startups, particularly those working on climate tech, sustainability, and deep technology. He co-founded the Zennstrom Philanthropies and is a driving force behind efforts to position the Nordics as a global hub for impact-driven technology. His combination of entrepreneurial credibility, global network, and climate focus makes him one of Europe's most sought-after angel backers.
Angel InvestorPre-Seed to Series AClimate TechDeep TechTechnology
Stockholm, Sweden · AcceleratorSting (Stockholm Innovation & Growth) is Sweden’s leading startup accelerator and incubator, founded in 2002 and based in Stockholm. Over two decades, Sting has built a reputation as one of Europe’s most successful support programs for high-tech startups. Each year, ~25 startups participate in Sting’s programs, which are tailored to ICT, sustainability, and deep tech ventures. Sting offers two main tracks: the Accelerate program (a shorter, intensive accelerator with investment) and the Incubate program (a longer incubation with office space and coaching). Startups benefit from SEK 400,000 (≈€35,000) in pre-seed investment via Sting’s Propel Capital angel fund, as well as hands-on mentorship from experienced entrepreneurs. Sting is notable for its extensive network in the Nordics – participants get access to 80+ industry mentors and introductions to a broad investor pool in Sweden and internationally. The results speak volumes: Sting has supported 270+ startups since inception, with a survival rate over 70% and multiple high-profile alumni. Success stories include Yubico (security keys unicorn), Sellpy (fashion recommerce, acquired by H&M), and ClimateView (climate planning SaaS). In addition to funding and coaching, Sting offers free office space at A House in Stockholm, product development labs, and perks from partners. The program emphasizes key performance indicators (KPIs) and growth milestones – Sting aims to help companies reach first customers, significant revenues, or Series A readiness within 6–18 months. Beyond individual companies, Sting has played a crucial role in Stockholm’s ecosystem: it co-founded SUP46 (Start-Up People of Sweden) co-working space and hosts Sweden’s annual Startup Demo Day. Sting alumni have collectively raised over €600 million. With the Swedish ecosystem maturing, Sting remains a cornerstone – providing new founders with structured support, an entrepreneurial community, and that all-important first investment to turbocharge their growth.
AcceleratorICTSustainabilityDeep Tech
Stockholm, Sweden · EventNordic/Baltic scale-up conference at Friends Arena with 7,500+ attendees and 400+ investors. Known for stage-specific pitch competitions and a strong sustainability and ESG focus.
EventEventsSustainabilityClimate TechFintechHealthTechArtificial Intelligence
Gothenburg, Sweden · AcceleratorVenture builder and fund founded in 2015 (building on earlier programs) that co-creates tech startups from Chalmers University research using its Encubation model. Support: incubation, seed investment, business coaches, and access to labs. Scope: Regional (West Sweden).
AcceleratorDeep TechIndustrialSustainability
Vienna, Austria · AcceleratorFounded in 2000, 3TS Capital Partners is a Vienna-based VC and growth equity firm investing EUR 5-20M at Series B and beyond in technology, media, and telecom companies across Central and Eastern Europe. The firm manages over EUR 500M and has completed 70+ investments with 30+ exits. Notable portfolio companies include SALESmanago (acquired by Bain Capital), Evrotrust, and Emarsys (acquired by SAP). 3TS focuses on profitable, scaling B2B software and digital media businesses in the DACH and CEE regions.
AcceleratorSeries B+TechnologyMediaCEE
Copenhagen, Denmark · AcceleratorAccelerace is Denmark's longest-running accelerator and pre-seed investor, founded in 2008 to help early-stage teams validate products, refine go-to-market strategy, and access investors. The program runs multiple tracks across general tech, life science, and sustainability, and pairs founders with a large mentor network. Accelerace also invests small tickets in selected teams and helps them prepare for follow-on funding. It has supported 800+ Nordic startups and remains a core launchpad in the Danish ecosystem.
AcceleratorPre-Seed to SeedGeneral TechLife ScienceSustainability
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