The 16 Largest US Funding Rounds of April 2025 – AlleyWatch

Looking at the largest US startup funding rounds from April 2025, leveraging data from CrunchBase, we’ve analyzed the month’s most significant venture capital deals. Beyond the raw funding numbers, this analysis includes detailed information about each company’s industry focus, founding team, business model, and total funding history to provide deeper context about these high-growth ventures.

16. Dataminr $100.0M

Round: VentureDescription: New York-based Dataminr is a real-time AI platform that detects early signs of high-impact events and emerging risks. Founded by Jeffrey Kinsey, Sam Hendel, and Theodore Bailey in 2009, Dataminr has now raised a total of $1.1B in total equity funding and is backed by BoxGroup, HSBC, Alumni Ventures, Wellington Management, and Fortress Investment Group.Investors in the round: Fortress Investment Group, NightDragonIndustry: Analytics, Artificial Intelligence (AI), Information Technology, Risk Management, SoftwareFounders: Jeffrey Kinsey, Sam Hendel, Theodore BaileyFounding year: 2009Location: New YorkTotal equity funding raised: $1.1B

16. Redpanda Data $100.0M

Round: Series DDescription: San Francisco-based Redpanda Data is a streaming data platform that is compatible with Kafka, offering developer tools and a growing ecosystem of connectors. Founded by Alexander Gallego in 2019, Redpanda Data has now raised a total of $265.5M in total equity funding and is backed by Lightspeed Venture Partners, Haystack, and Google Ventures.Investors in the round: Google Ventures, Lightspeed Venture PartnersIndustry: Analytics, Big Data, Consulting, Developer Tools, Information Technology, SoftwareFounders: Alexander GallegoFounding year: 2019Location: San FranciscoTotal equity funding raised: $265.5M

16. Hammerspace $100.0M

Round: Series BDescription: San Mateo-based Hammerspace is a data platform that obliterates data access delays for AI and high-performance computing. Founded by David Flynn, Douglas Fallstrom, and Trond Myklebust in 2018, Hammerspace has now raised a total of $156.7M in total equity funding and is backed by Altimeter Capital, ARK Investment Management, Prosperity7 Ventures, ICU Ventures, and Pier 88 Investment Partners.Investors in the round: Altimeter Capital, ARK Investment ManagementIndustry: Artificial Intelligence (AI), Cloud Data Services, Cloud Storage, Data Management, Data StorageFounders: David Flynn, Douglas Fallstrom, Trond MyklebustFounding year: 2018Location: San MateoTotal equity funding raised: $156.7M

16. Cyberhaven $100.0M

Round: Series DDescription: Palo Alto-based Cyberhaven is an AI-powered data security company focused on detecting and preventing data loss, insider threats, and protecting cloud data. Founded by Cristian Zamfir, George Candea, Radu Banabic, Vitaly Chipounov, and Volodymyr Kuznetsov in 2016, Cyberhaven has now raised a total of $236.5M in total equity funding and is backed by StepStone Group, Khosla Ventures, Vertex Ventures, Wing Venture Capital, and Industry Ventures.Investors in the round: Adams Street Partners, Crane Venture Partners, Industry Ventures, Khosla Ventures, Redpoint, Schroders, StepStone GroupIndustry: Artificial Intelligence (AI), Cloud Security, Cyber Security, Information Technology, Network Security, SecurityFounders: Cristian Zamfir, George Candea, Radu Banabic, Vitaly Chipounov, Volodymyr KuznetsovFounding year: 2016Location: Palo AltoTotal equity funding raised: $236.5M

16. Flow $100.0M

Round: Series BDescription: Miami-based Flow is a residential real estate firm that provides lifestyle, financial, and other services. Founded by Adam Neumann in 2022, Flow has now raised a total of $450.0M in total equity funding and is backed by Andreessen Horowitz.Investors in the round: Andreessen Horowitz, Khosla VenturesIndustry: Commercial Real Estate, Communities, Property Development, Real Estate, ResidentialFounders: Adam NeumannFounding year: 2022Location: MiamiTotal equity funding raised: $450.0M

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15. Nuro $106.0M

Round: Series EDescription: Mountain View-based Nuro is a robotics company specializing in the development of autonomous driving technologies. Founded by Dave Ferguson and Jiajun Zhu in 2016, Nuro has now raised a total of $2.2B in total equity funding and is backed by Google, Tiger Global Management, SoftBank Vision Fund, Fidelity, and Greylock.Investors in the round: Fidelity, Greylock, T. Rowe Price, Tiger Global Management, XNIndustry: Artificial Intelligence (AI), Autonomous Vehicles, Robotics, TransportationFounders: Dave Ferguson, Jiajun ZhuFounding year: 2016Location: Mountain ViewTotal equity funding raised: $2.2B

14. CAST AI $108.0M

Round: Series CDescription: North Miami Beach-based CAST AI is the leading Kubernetes automation platform that cuts AWS, Azure, and GCP customers’ cloud costs by over 50% Founded by Augustinas Stirbis, Austeja Zymantaite, Einaras von Gravrock, Laurent Gil, Leon Kuperman, Vilius Zukauskas, and Yuri Frayman in 2019, CAST AI has now raised a total of $181.0M in total equity funding and is backed by Samsung NEXT, Creandum, Cota Capital, SoftBank Vision Fund, and G2 Venture Partners.Investors in the round: Aglae Ventures, Cota Capital, Creandum, G2 Venture Partners, Hedosophia, SoftBank Vision Fund, Uncorrelated Ventures, Vintage Investment PartnersIndustry: Artificial Intelligence (AI), Cloud Computing, Cloud Infrastructure, Cloud Management, Cloud Security, Developer Platform, Developer Tools, DevOps, SaaS, SoftwareFounders: Augustinas Stirbis, Austeja Zymantaite, Einaras von Gravrock, Laurent Gil, Leon Kuperman, Vilius Zukauskas, Yuri FraymanFounding year: 2019Location: North Miami BeachTotal equity funding raised: $181.0M

14. Veza $108.0M

Round: Series DDescription: Palo Alto-based Veza is a data security platform that helps users use and share their data safely. Founded by Maohua Lu, Rob Whitcher, and Tarun Thakur in 2020, Veza has now raised a total of $233.0M in total equity funding and is backed by Norwest Venture Partners, Accel, Ballistic Ventures, Bain Capital, and New Enterprise Associates.Investors in the round: Accel, Atlassian Ventures, Ballistic Ventures, Blackstone Innovations Investments, Google Ventures, JP Morgan, New Enterprise Associates, Norwest Venture Partners, Snowflake Ventures, True Ventures, Workday VenturesIndustry: Cloud Security, Database, Security, SoftwareFounders: Maohua Lu, Rob Whitcher, Tarun ThakurFounding year: 2020Location: Palo AltoTotal equity funding raised: $233.0M

13. Electra.aero $115.0M

Round: Series BDescription: Washington-based Electra develops hybrid-electric aircraft for sustainable urban and regional air mobility. Founded by John Langford in 2020, Electra.aero has now raised a total of $115.0M in total equity funding and is backed by Prysm Capital, Lockheed Martin Ventures, Statkraft Ventures, Honeywell, and Virginia Innovation Partnership Corporation.Investors in the round: Honeywell, Lockheed Martin Ventures, Prysm Capital, Safran, Statkraft Ventures, Virginia Innovation Partnership CorporationIndustry: Aerospace, Air Transportation, Electric VehicleFounders: John LangfordFounding year: 2020Location: WashingtonTotal equity funding raised: $115.0M

13. Rescale $115.0M

Round: Series DDescription: San Francisco-based Rescale is a cloud simulation platform that enables research scientists and engineers to build, compute, analyze, and scale simulations. Founded by Adam McKenzie and Joris Poort in 2011, Rescale has now raised a total of $272.4M in total equity funding and is backed by Andreessen Horowitz, Y Combinator, NVIDIA, Gaingels, and Mitsubishi UFJ Capital.Investors in the round: Applied Ventures, Atika Capital Management, Cloud Network Technology, Hanwha Asset Management Deeptech Venture Fund, Hitachi Ventures, Jeff Bezos, NEC Orchestrating Future Fund, NVIDIA, Paul Graham, Peter Thiel, Prosperity7 Ventures, Sam Altman, SineWave Ventures, Translink Capital, University of Michigan, Y CombinatorIndustry: Analytics, Artificial Intelligence (AI), Enterprise Software, Machine Learning, Simulation, Software, Software EngineeringFounders: Adam McKenzie, Joris PoortFounding year: 2011Location: San FranciscoTotal equity funding raised: $272.4M

12. Auradine $138.0M

Round: Series CDescription: Santa Clara-based Auradine provides web infrastructure solutions encompassing blockchain, artificial intelligence, and privacy technologies. Founded by Barun Kar and Rajiv Khemani in 2022, Auradine has now raised a total of $289.0M in total equity funding and is backed by MARAHOLDING, StepStone Group, Mayfield Fund, Celesta Capital, and Top Tier Capital Partners.Investors in the round: GSBackers, MARAHOLDING, Maverick Silicon, Mayfield Fund, Premji Invest, Qualcomm Ventures, Samsung Catalyst Fund, StepStone GroupIndustry: Blockchain, Information Technology, Infrastructure, SecurityFounders: Barun Kar, Rajiv KhemaniFounding year: 2022Location: Santa ClaraTotal equity funding raised: $289.0M

11. Manychat $140.0M

Round: Series BDescription: Palo Alto-based Manychat is a chat marketing platform that helps businesses automate conversations and engage with customers across messaging channels. Founded by Mikael Yang in 2015, Manychat has now raised a total of $163.1M in total equity funding and is backed by Bessemer Venture Partners, 500 Global, Summit Partners, Flint Capital, and Skywell Capital Partners.Investors in the round: Summit PartnersIndustry: Marketing, Messaging, Sales, SoftwareFounders: Mikael YangFounding year: 2015Location: Palo AltoTotal equity funding raised: $163.1M

10. SandboxAQ $150.0M

Round: Series EDescription: Palo Alto-based SandboxAQ develops AI and quantum technology solutions that enhance biopharma, cybersecurity, and materials science. Founded by Jack Hidary in 2016, SandboxAQ has now raised a total of $950.0M in total equity funding and is backed by NVIDIA, Google, BNP Paribas, S32, and US Innovative Technology Fund.Investors in the round: Beyond Alpha Ventures, BNP Paribas, Google, Horizon Kinetics LLC, NVIDIA, Ray DalioIndustry: Artificial Intelligence (AI), Cyber Security, Information Technology, Quantum Computing, SaaSFounders: Jack HidaryFounding year: 2016Location: Palo AltoTotal equity funding raised: $950.0M

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9. Altruist $152.0M

Round: Series FDescription: Culver City-based Altruist is a modern custodian that offers a digital investment platform for financial advisors to manage their clients’ investments. Founded by Jason Wenk in 2018, Altruist has now raised a total of $601.5M in total equity funding and is backed by Insight Partners, ICONIQ Growth, Adams Street Partners, Endeavor Catalyst, and Salesforce Ventures.Investors in the round: Baillie Gifford, Carson Family Office, Geodesic Capital, GIC, ICONIQ Growth, Salesforce VenturesIndustry: Asset Management, Financial Services, FinTechFounders: Jason WenkFounding year: 2018Location: Culver CityTotal equity funding raised: $601.5M

8. Electra $186.0M

Round: Series BDescription: Boulder-based Electra produces clean iron using low-temperature electrochemistry powered by renewables to decarbonize and transform steel production. Founded by Sandeep Nijhawan in 2020, Electra has now raised a total of $299.3M in total equity funding and is backed by National Science Foundation, Temasek Holdings, Lowercarbon Capital, S2G Investments, and Valor Equity Partners.Investors in the round: BHP Ventures, Breakthrough Energy Ventures, Builders Vision, Capricorn Investment Group, Collaborative Fund, Earth Venture Capital, Interfer, Lowercarbon Capital, Nucor Corporation, Rio Tinto, Roy Hill, S2G Investments, Temasek Holdings, Toyota Tsusho, Yamato KogyoIndustry: Energy, Industrial, Renewable EnergyFounders: Sandeep NijhawanFounding year: 2020Location: BoulderTotal equity funding raised: $299.3M

7. Apex $200.0M

Round: Series CDescription: Los Angeles-based Apex designs and manufactures satellite buses tailored for various space missions. Founded by Ian Cinnamon and Maximilian Benassi in 2022, Apex has now raised a total of $322.0M in total equity funding and is backed by StepStone Group, Andreessen Horowitz, Village Global, 8VC, and Shield Capital.Investors in the round: 8VC, Andreessen Horowitz, Point72 Ventures, StepStone Group, Washington Harbour PartnersIndustry: Aerospace, Commercial, ManufacturingFounders: Ian Cinnamon, Maximilian BenassiFounding year: 2022Location: Los AngelesTotal equity funding raised: $322.0M

7. Supabase $200.0M

Round: Series DDescription: San Francisco-based Supabase is an open-source Firebase alternative that provides a full PostgreSQL database. Founded by Anthony Wilson and Paul Copplestone in 2020, Supabase has now raised a total of $396.1M in total equity funding and is backed by Y Combinator, Accel, Craft Ventures, Lightspeed Venture Partners, and Coatue.Investors in the round: Accel, Coatue, Craft Ventures, Felicis, Guillermo Rauch, Kevin Weil, Taylor Otwell, Y CombinatorIndustry: Artificial Intelligence (AI), Database, Developer Tools, Information Services, Information Technology, SoftwareFounders: Anthony Wilson, Paul CopplestoneFounding year: 2020Location: San FranciscoTotal equity funding raised: $396.1M

7. Persona $200.0M

Round: Series DDescription: San Francisco-based Persona is an identity verification and management platform that enables businesses to automate and streamline their verification processes. Founded by Charles Yeh and Rick Song in 2018, Persona has now raised a total of $417.5M in total equity funding and is backed by Founders Fund, Coatue, First Round Capital, Index Ventures, and Kleiner Perkins.Investors in the round: Bond, Chemistry, Coatue, First Round Capital, Founders Fund, Index Ventures, Ribbit CapitalIndustry: Cyber Security, Fraud Detection, Identity Management, Information Technology, SaaSFounders: Charles Yeh, Rick SongFounding year: 2018Location: San FranciscoTotal equity funding raised: $417.5M

7. Base Power $200.0M

Round: Series BDescription: Austin-based Base Power is a modern energy provider that specializes in residential backup battery systems and electricity plans. Founded by Zachary Dell in 2023, Base Power has now raised a total of $268.0M in total equity funding and is backed by Andreessen Horowitz, Lightspeed Venture Partners, Thrive Capital, Valor Equity Partners, and Altimeter Capital.Investors in the round: Addition, Altimeter Capital, Andreessen Horowitz, Jackson Moses, Lightspeed Venture Partners, Terrain, Thrive Capital, Trust Ventures, Valor Equity PartnersIndustry: Electrical Distribution, Energy, Energy Management, Power GridFounders: Zachary DellFounding year: 2023Location: AustinTotal equity funding raised: $268.0M

6. Mainspring Energy $258.0M

Round: Series FDescription: Menlo Park-based Mainspring Energy provides power generation technology using linear generators for clean energy. Founded by Adam Simpson, Matt Svrcek, and Shannon Miller in 2010, Mainspring Energy has now raised a total of $726.0M in total equity funding and is backed by General Catalyst, Temasek Holdings, Alumni Ventures, Khosla Ventures, and Lightrock.Investors in the round: Climate Pledge Fund, DCVC, Gates Frontier Fund, General Catalyst, Khosla Ventures, LGT group, Lightrock, M&G Investments, Marunouchi Innovation Partners, Pictet Private Equity Investors S.A., Temasek HoldingsIndustry: Clean Energy, Energy, Oil and GasFounders: Adam Simpson, Matt Svrcek, Shannon MillerFounding year: 2010Location: Menlo ParkTotal equity funding raised: $726.0M

5. True Anomaly $260.0M

Round: Series CDescription: Centennial-based True Anomaly is builds space security and resilience at the intersection of spacecraft, software, and autonomy. Founded by Even Rogers and Kyle Zakrzewski in 2022, True Anomaly has now raised a total of $400.6M in total equity funding and is backed by Menlo Ventures, Accel, Rocketship.vc, Eclipse Ventures, and Riot Ventures.Investors in the round: 645 Ventures, Accel, ACME Capital, Champion Hill Ventures, Eclipse Ventures, Menlo Ventures, Meritech Capital Partners, Narya Capital, Riot Ventures, Space.VCIndustry: Aerospace, Artificial Intelligence (AI), Manufacturing, Military, National SecurityFounders: Even Rogers, Kyle ZakrzewskiFounding year: 2022Location: CentennialTotal equity funding raised: $400.6M

4. Runway $308.0M

Round: Series DDescription: New York-based Runway is an applied AI research company that creates AI-powered content creation tools for the media and entertainment sectors. Founded by Alejandro Matamala Ortiz, Anastasis Germanidis, and Cristobal Valenzuela Barrera in 2018, Runway has now raised a total of $544.5M in total equity funding and is backed by General Atlantic, NVIDIA, Madrona, Google, and Felicis.Investors in the round: Baillie Gifford, Fidelity, General Atlantic, NVIDIA, SoftBankIndustry: Apps, Artificial Intelligence (AI), Generative AI, Machine Learning, Software, Video EditingFounders: Alejandro Matamala Ortiz, Anastasis Germanidis, Cristobal Valenzuela BarreraFounding year: 2018Location: New YorkTotal equity funding raised: $544.5M

3. Chainguard $356.0M

Round: Series DDescription: Kirkland-based Chainguard is a cloud-native development platform that provides low-to-zero CVE container images for building and running applications. Founded by Dan Lorenc, Kim Lewandowski, and Ville Aikas in 2021, Chainguard has now raised a total of $612.0M in total equity funding and is backed by Lightspeed Venture Partners, Sequoia Capital, IVP, Spark Capital, and Kleiner Perkins.Investors in the round: Amplify Partners, Datadog Ventures, IVP, Kleiner Perkins, Lightspeed Venture Partners, MANTIS Venture Capital, Redpoint, Salesforce Ventures, Sequoia Capital, Spark Capital, Windproof Partners (fka Kerrest & Co.)Industry: Cloud Security, Developer Tools, Enterprise Software, Open Source, SecurityFounders: Dan Lorenc, Kim Lewandowski, Ville AikasFounding year: 2021Location: KirklandTotal equity funding raised: $612.0M

2. Plaid $575.0M

Round: VentureDescription: San Francisco-based Plaid develops financial technology infrastructure that enables applications to connect with users’ bank accounts and financial data. Founded by William Hockey and Zachary Perret in 2013, Plaid has now raised a total of $1.3B in total equity funding and is backed by Franklin Templeton, Andreessen Horowitz, BlackRock, Norwest Venture Partners, and BoxGroup.Investors in the round: BlackRock, Fidelity, Franklin Templeton, New Enterprise Associates, Ribbit CapitalIndustry: Banking, Financial Services, FinTech, InsurTech, Wealth ManagementFounders: William Hockey, Zachary PerretFounding year: 2013Location: San FranciscoTotal equity funding raised: $1.3B

1. Safe Superintelligence $2.0B

Round: VentureDescription: Palo Alto-based Safe Superintelligence develops AI solutions prioritizing safety in artificial intelligence. Founded by Daniel Gross, Daniel Levy, and Ilya Sutskever in 2024, Safe Superintelligence has now raised a total of $3.0B in total equity funding and is backed by Andreessen Horowitz, NVIDIA, Lightspeed Venture Partners, Sequoia Capital, and DST Global.Investors in the round: Alphabet, Andreessen Horowitz, DST Global, Greenoaks, Lightspeed Venture Partners, NVIDIAIndustry: Artificial Intelligence (AI), Information Technology, Internet, Software EngineeringFounders: Daniel Gross, Daniel Levy, Ilya SutskeverFounding year: 2024Location: Palo AltoTotal equity funding raised: $3.0B