Summit Partners
Global growth-equity firm since 1984 pairing proprietary sourcing with hands-on operational support for tech, healthcare and growth-sector leaders.
Sunfish Partners
Early stage VC investing in defense tech startups from Eastern Europe (CEE)
Sunflower Capital
Pre-seed and seed firm led by Sequoia alum Liu Jiang, backing the earliest-stage founders building enterprise infrastructure, AI, developer tools, and defense hardware.
Superangel
Early stage funding for world-changing tech in the Baltics and Nordics
Superangels
Munich-based business angel matching fund that co-invests alongside 20 selected superangels in pre-seed and seed tech startups globally across AI, fintech, climate, and healthtech.
Superhero Capital
Early-stage VC investing in Nordic tech startups
Supermoon Capital
The world's first VC fund exclusively backing early-stage startups in sleep and circadian health, across healthcare, consumer, and biotech.
Supernova Invest
European multi-stage VC providing patient capital to deeptech startups in industrial, digital, health, cleantech
Superorganism
Pre-seed and seed VC dedicated to biodiversity startups
SuperSeed
London-based seed-stage VC founded by tech entrepreneurs, backing technical founders applying AI to physical industries: manufacturing, logistics, construction, defence, and energy.
Sure Valley Ventures
Operator-led seed VC backing AI software founders in the UK and Ireland since 2017. Leads rounds of £250K–£1.5M with deep technical due diligence and active Series A support.
Surface Ventures
Pre-seed and seed fund focused on B2B software at low valuations
Susa Ventures
Seed-stage fund helping founders build billion-dollar companies
Susquehanna Sustainable Investments
Climate-focused early-stage fund backed by Susquehanna International Group, investing in mitigation, adaptation, and removal startups
Susquehanna Venture Capital
Proprietary capital arm of Susquehanna International Group investing from Series A to IPO in emerging markets and high-growth sectors with no fixed fund timelines.
Sutter Hill Ventures
Venture firm partnering with founders to build enduring companies
SV Angel
Investing long-term in founders to create impact beyond business
Swanlaab Venture Factory
Spain-based venture factory investing in B2B software, deep tech, and agri-food startups at seed and early Series A.
Swell VC
Pre-seed and seed VC backing founders rebuilding critical infrastructure with AI across enterprise, space, defense, biotech, industrial, and commerce. NYC-based, operator-led.
Swift Ventures
San Francisco-based early-stage VC led by former founders, investing in AI and automation companies with B2B business models from pre-seed through Series A.
Swisscom Ventures
Corporate VC advising Swisscom's investment funds, specializing in Swiss university spin-offs from seed through Series C with an 18-year track record and 45 exits.
Symphonic Capital
Pre-seed VC backing AI-enabled founders building equitable healthcare and financial services systems for underserved communities. Checks around $250K on sub-$10M valuations.
SYN Ventures
Cybersecurity-focused venture firm backing early growth companies
Synchrony Ventures
Corporate VC arm of Synchrony Financial backing early-stage startups in fintech, commerce, and health and wellness.
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