# Top 50 Startups in London, United States by Funding (2026)

> The 50 best-funded startups in London, United States, ranked by total funding raised: $3.4B combined.

Source: https://millionrounds.com/top-lists/startups-london-united-states (Millionrounds; every figure on the page links to its filing or article)

- 1 [**World Labs** WorldLabs is a digital global innovation platform that fast-tracks the development of innovative ideas](https://millionrounds.com/company/world-labs) WorldLabs is a digital global innovation platform that fast-tracks the development of innovative ideas *Founded* 1917 London, United States **$1.0B** last round Feb 2026
- 2 [**Aiolos Bio** Aiolos Bio is a biotech company developing innovative therapies for respiratory diseases and immune conditions.](https://millionrounds.com/company/aiolos-bio) Aiolos Bio is a biotech company developing innovative therapies for respiratory diseases and immune conditions. *Founded* 2023 London, United States **$245M** last round Oct 2023
- 3 [**Flo Health** Flo Health develops a women’s health app that provides access to cycle tracking, health insights, and a private community.](https://millionrounds.com/company/flo-health) Flo Health develops a women’s health app that provides access to cycle tracking, health insights, and a private community. *Founded* 2015 London, United States **$212M** last round Jan 2025
- 4 [**Granola** Granola is a SAAS company that offers AI driven note-taking services.](https://millionrounds.com/company/granola) Granola is a SAAS company that offers AI driven note-taking services. *Founded* 2023 London, United States **$168M** last round Mar 2026
- 5 [**Honest Health** Honest Health is a Nashville-based healthcare company founded in 2021, focusing on transforming primary care through physician-led, value-based care models.](https://millionrounds.com/company/honest-health) Honest Health is a Nashville-based healthcare company founded in 2021, focusing on transforming primary care through physician-led, value-based care models. *Founded* 2018 London, United States **$140M** last round Feb 2026
- 6 [**Cleo** Empower people to build a life beyond their next paycheck.](https://millionrounds.com/company/cleo) Empower people to build a life beyond their next paycheck. *Founded* 2016 London, United States **$132M** last round Jun 2022
- 7 [**Idrx** Idrx is a clinical-stage biopharmaceutical company dedicated to transforming cancer treatment.](https://millionrounds.com/company/idrx) Idrx is a clinical-stage biopharmaceutical company dedicated to transforming cancer treatment. *Founded* 2022 London, United States **$120M** last round Aug 2024
- 8 [**Peak®** Peak’s mission is to help the world spend their time better using tools and technique borrowed from education, neuroscience and gaming.](https://millionrounds.com/company/peak) Peak’s mission is to help the world spend their time better using tools and technique borrowed from education, neuroscience and gaming. *Founded* 2012 London, United States **$116M** last round Jan 2024
- 9 [**Jellyfish** Jellyfish is a marketing performance company that offers digital services.](https://millionrounds.com/company/jellyfish) Jellyfish is a marketing performance company that offers digital services. *Founded* 2005 London, United States **$108M** last round Feb 2022
- 10 [**Trusted** Trusted is the system of record for customer advocacy.](https://millionrounds.com/company/trusted) Trusted is the system of record for customer advocacy. *Founded* 2025 London, United States **$95M** last round Apr 2025
- 11 [**Threecolts** Threecolts is a London-based technology company that specializes in cloud-based business management software for the e-commerce sector.](https://millionrounds.com/company/threecolts) Threecolts is a London-based technology company that specializes in cloud-based business management software for the e-commerce sector. *Founded* 2021 London, United States **$91M** last round Mar 2023
- 12 [**Whistle** Whistle is a global Sales Development Agency empowering fast-growing companies with operations, teams and strategies to generate revenue.](https://millionrounds.com/company/whistle) Whistle is a global Sales Development Agency empowering fast-growing companies with operations, teams and strategies to generate revenue. *Founded* 2019 London, United States **$87M** last round Mar 2022
- 13 [**Rocket Lawyer** Rocket Lawyer is a legal technology company.](https://millionrounds.com/company/rocket-lawyer) Rocket Lawyer is a legal technology company. *Founded* 2012 London, United States **$72M** last round May 2013
- 14 [**YouGov** YouGov is a global research data and analytics group that is powered by reality.](https://millionrounds.com/company/yougov) YouGov is a global research data and analytics group that is powered by reality. *Founded* 1998 London, United States **$54M** last round Aug 2007
- 15 [**Jobster** Jobster is an online recruitment agency based in the United Kingdom](https://millionrounds.com/company/jobster) Jobster is an online recruitment agency based in the United Kingdom *Founded* 2004 London, United States **$53M** last round Apr 2008
- 16 [**Flock** London-based insurtech building the world's first fully digital insurance company for connected and autonomous commercial vehicles](https://millionrounds.com/company/flock) London-based insurtech building the world's first fully digital insurance company for connected and autonomous commercial vehicles *Founded* 2015 London, United States **$44M** last round Feb 2023
- 17 [**BabyList** Babylist is an online baby registry that helps parents choose apparels and accessories for a new baby.](https://millionrounds.com/company/babylist) Babylist is an online baby registry that helps parents choose apparels and accessories for a new baby. *Founded* 1995 London, United States **$41M** last round Nov 2021
- 18 [**Zya** We use the power of enzymes to transform how our bodies use food.](https://millionrounds.com/company/zya) We use the power of enzymes to transform how our bodies use food. *Founded* 2018 London, United States **$37M** last round Jun 2015
- 19 [**OneStep** OneStep is a London-based company founded in 2024 that specializes in reusable cup solutions for music events, sports venues, sponsors, and fans.](https://millionrounds.com/company/onestep) OneStep is a London-based company founded in 2024 that specializes in reusable cup solutions for music events, sports venues, sponsors, and fans. *Founded* 2024 London, United States **$36M** last round Oct 2024
- 20 [**Tembo** Tembo is an event resource management firm that offers marketing, content production, and event management services.](https://millionrounds.com/company/tembo) Tembo is an event resource management firm that offers marketing, content production, and event management services. *Founded* 2014 London, United States **$36M** last round Feb 2026
- 21 [**Cocoon** COCOON is a membership subscription service that offers a circular rental solution for luxury bags.](https://millionrounds.com/company/cocoon) COCOON is a membership subscription service that offers a circular rental solution for luxury bags. *Founded* 2019 London, United States **$35M** last round Mar 2026
- 22 [**Zeni** Zeni is a hospitality brand that offers short-stay apartments and serviced accommodations in various UK cities, including Manchester, York, and Derby.](https://millionrounds.com/company/zeni) Zeni is a hospitality brand that offers short-stay apartments and serviced accommodations in various UK cities, including Manchester, York, and Derby. *Founded* 2021 London, United States **$34M** last round Aug 2021
- 23 [**SkyDox** PLEASE NOTE: In September 2012 SkyDox joined forces with Workshare.](https://millionrounds.com/company/skydox) PLEASE NOTE: In September 2012 SkyDox joined forces with Workshare. *Founded* 2009 London, United States **$32M** last round Sept 2012
- 24 [**InnoCentive** InnoCentive is a leader in open innovation and crowdsourcing, helping organizations tackle complex business, scientific, and technical challenges.](https://millionrounds.com/company/innocentive) InnoCentive is a leader in open innovation and crowdsourcing, helping organizations tackle complex business, scientific, and technical challenges. *Founded* 2001 London, United States **$30M** last round Oct 2011
- 25 [**Viv** bsktpay is an AI platform that provides customer insights for automotive dealers and lenders to drive engagement and retention.](https://millionrounds.com/company/viv) bsktpay is an AI platform that provides customer insights for automotive dealers and lenders to drive engagement and retention. *Founded* 2021 London, United States **$30M** last round Nov 2015
- 26 [**Algomi** Algomi is a software company that provides technology to financial market participants to improve their workflow and liquidity.](https://millionrounds.com/company/algomi) Algomi is a software company that provides technology to financial market participants to improve their workflow and liquidity. *Founded* 2012 London, United States **$24M** last round Mar 2025
- 27 [**Covestor** Covestor develops portfolio sync technology that enables investors to select investment management talents for online marketplaces.](https://millionrounds.com/company/covestor) Covestor develops portfolio sync technology that enables investors to select investment management talents for online marketplaces. *Founded* 2005 London, United States **$24M** last round Jun 2013
- 28 [**Ostium** Ostium Labs, Co.](https://millionrounds.com/company/ostium) Ostium Labs, Co. *Founded* - London, United States **$24M** last round Dec 2025
- 29 [**Colossyan** Colossyan is an AI-driven content production technology company based in London, with additional hubs in Frederiksberg, Denmark, and Budapest, Hungary.](https://millionrounds.com/company/colossyan) Colossyan is an AI-driven content production technology company based in London, with additional hubs in Frederiksberg, Denmark, and Budapest, Hungary. *Founded* 2020 London, United States **$22M** last round Feb 2024
- 30 [**Memrise** Memrise is a British EdTech company founded in 2010 and based in London.](https://millionrounds.com/company/memrise) Memrise is a British EdTech company founded in 2010 and based in London. *Founded* 2010 London, United States **$22M** last round Jun 2018
- 31 [**Capi Money** Capi Money is a fintech company based in London, founded in 2023.](https://millionrounds.com/company/capi-money) Capi Money is a fintech company based in London, founded in 2023. *Founded* 2023 London, United States **$21M** last round Jul 2025
- 32 [**Debut** Debut is a UK-based careers app designed for students and graduates, launched in 2015.](https://millionrounds.com/company/debut) Debut is a UK-based careers app designed for students and graduates, launched in 2015. *Founded* 2015 London, United States **$20M** last round Aug 2025
- 33 [**Pebble** Pebble is a children’s activity and childcare booking platform operated by Sprout Care Limited in England and Wales.](https://millionrounds.com/company/pebble) Pebble is a children’s activity and childcare booking platform operated by Sprout Care Limited in England and Wales. *Founded* 2021 London, United States **$20M** last round Jun 2023
- 34 [**Mercaux** Mercaux is a London-based B2B SaaS provider established in 2013, specializing in an in-store clienteling and customer experience platform.](https://millionrounds.com/company/mercaux) Mercaux is a London-based B2B SaaS provider established in 2013, specializing in an in-store clienteling and customer experience platform. *Founded* 2013 London, United States **$19M** last round Nov 2022
- 35 [**Nodal** Nodal Exchange, LLC is a commodities exchange based in Tysons Corner, Virginia, specializing in trading platforms for energy markets, including power, natural g](https://millionrounds.com/company/nodal) Nodal Exchange, LLC is a commodities exchange based in Tysons Corner, Virginia, specializing in trading platforms for energy markets, including power, natural g *Founded* 2017 London, United States **$15M** last round Jul 2026
- 36 [**Heka** Heka is an AI-powered employee benefits platform that offers personalized health and wellness solutions for organizations.](https://millionrounds.com/company/heka) Heka is an AI-powered employee benefits platform that offers personalized health and wellness solutions for organizations. *Founded* 2016 London, United States **$15M** last round Jul 2025
- 37 [**Abacus** Abacus is a leading Software as a Service (SaaS) provider with over 20 years of experience, focusing on digital transformation for the B2B publishing sector and](https://millionrounds.com/company/abacus) Abacus is a leading Software as a Service (SaaS) provider with over 20 years of experience, focusing on digital transformation for the B2B publishing sector and *Founded* 1977 London, United States **$15M** last round Nov 2025
- 38 [**375ai** 375ai is a decentralized edge data intelligence network that focuses on structuring real-world physical data for AI.](https://millionrounds.com/company/375ai) 375ai is a decentralized edge data intelligence network that focuses on structuring real-world physical data for AI. *Founded* 2022 London, United States **$15M** last round Oct 2025
- 39 [**Caviar** Caviar is an Academy Award-winning independent production company and film studio with offices in London, Los Angeles, Brussels, Paris, and Amsterdam.](https://millionrounds.com/company/caviar) Caviar is an Academy Award-winning independent production company and film studio with offices in London, Los Angeles, Brussels, Paris, and Amsterdam. *Founded* 2005 London, United States **$15M** last round Apr 2014
- 40 [**Zoe** ZOE Limited is a nutrition science and health technology company based in the United Kingdom.](https://millionrounds.com/company/zoe) ZOE Limited is a nutrition science and health technology company based in the United Kingdom. *Founded* 2017 London, United States **$15M** last round Jul 2024
- 41 [**Traiana** Traian is an ICAP group company focused on automating post-trade processing of financial institutions.](https://millionrounds.com/company/traiana) Traian is an ICAP group company focused on automating post-trade processing of financial institutions. *Founded* 2000 London, United States **$15M** last round Oct 2005
- 42 [**Loop AI** Loop.AI gives your team AI superpowers by adding smart, named AI agents into your daily workflows.](https://millionrounds.com/company/loop-ai) Loop.AI gives your team AI superpowers by adding smart, named AI agents into your daily workflows. *Founded* 2017 London, United States **$14M** last round Feb 2026
- 43 [**InnerWorkings** Founded in 1991, HH Global is a global outsourced marketing execution provider.](https://millionrounds.com/company/innerworkings) Founded in 1991, HH Global is a global outsourced marketing execution provider. *Founded* 1991 London, United States **$13M** last round Feb 2008
- 44 [**Level** Level is an application that provides an array of loans, funding, financial, tax returns, liquidity, legal advice, and lending services.](https://millionrounds.com/company/level) Level is an application that provides an array of loans, funding, financial, tax returns, liquidity, legal advice, and lending services. *Founded* 2016 London, United States **$12M** last round Mar 2025
- 45 [**Social Plus** At social.plus, we are on a mission to redefine social networking by providing brands with all the technology they need to deliver curated, engaging and privacy](https://millionrounds.com/company/social-plus) At social.plus, we are on a mission to redefine social networking by providing brands with all the technology they need to deliver curated, engaging and privacy *Founded* 2021 London, United States **$12M** last round Jun 2024
- 46 [**Altitude** Altitude is a decentralized finance company that offers an automated borrowing protocol for cryptocurrency users.](https://millionrounds.com/company/altitude) Altitude is a decentralized finance company that offers an automated borrowing protocol for cryptocurrency users. *Founded* 2021 London, United States **$11M** last round Oct 2025
- 47 [**MessageGate** MessageGate offers enterprise e-mail governance software and services.](https://millionrounds.com/company/messagegate) MessageGate offers enterprise e-mail governance software and services. *Founded* 2001 London, United States **$11M** last round Aug 2009
- 48 [**Irys** Irys is a pioneering company that has developed the first programmable datachain, an L1 blockchain focused on optimizing data storage and execution.](https://millionrounds.com/company/irys) Irys is a pioneering company that has developed the first programmable datachain, an L1 blockchain focused on optimizing data storage and execution. *Founded* 2021 London, United States **$10M** last round Aug 2025
- 49 [**Filtered** Filtered is the world's leading learning recommendation platform](https://millionrounds.com/company/filtered) Filtered is the world's leading learning recommendation platform *Founded* 2009 London, United States **$10M** last round Mar 2022
- 50 [**WikiCell Designs** WikiCell Designs develops edible forms of packaging that enclose food or drinks in ways similar to how nature protects them.](https://millionrounds.com/company/wikicell-designs) WikiCell Designs develops edible forms of packaging that enclose food or drinks in ways similar to how nature protects them. *Founded* 2012 London, United States **$10M** last round Sept 2012

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Every startup we hold in London, United States, ranked by the total it has raised in rounds we hold. Nobody pays to be on a list.

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