The 18 Largest US Funding Rounds of April 2026 – AlleyWatch

April 2026 opened with a statement. A single $10B round to Project Prometheus – Jeff Bezos’s AI company targeting the physical economy – set the tone for a month. Leveraging data from CrunchBase, this report tracks the largest US startup funding rounds of April 2026, covering each company’s round type, founding team, industry focus, investor syndicate, and total equity raised to date. Beyond the headline numbers, the deals reflect a decisive shift in venture conviction: defense tech, nuclear energy, autonomous systems, and AI infrastructure are no longer emerging themes – they’re where the biggest checks are going

18. Scout AI $100.0M

Round: Series ADescription: Sunnyvale-based Scout AI develops AI systems for defense robotics, focused on enabling autonomous behavior across unmanned platforms. Founded by Colby Adcock and Collin Otis in 2024, Scout AI has now raised a total of $115.2M in total equity funding and is backed by Gaingels, Draper Associates, Booz Allen Ventures, FJ Labs, and Decisive Point.Investors in the round: Align Ventures, Booz Allen Ventures, Bravo Victor Venture Capital, Decisive Point, Disruptive Founders Fund, Draper Associates, Evolution VC Partners, FJ Labs, Heraclitus Capital Management, Monte Carlo Capital, Neman Ventures, Shane Neman, Sigmas Group, Vaughn Capital PartnersIndustry: Aerospace, Artificial Intelligence (AI), ManufacturingFounders: Colby Adcock, Collin OtisFounding year: 2024Location: SunnyvaleTotal equity funding raised: $115.2M

18. Parallel $100.0M

Round: Series BDescription: Palo Alto-based Parallel develops a agents and tool APIs for building AI that accesses and utilizes the open web. Founded by Parag Agrawal in 2023, Parallel has now raised a total of $260M in total equity funding and is backed by Khosla Ventures, Sequoia Capital, Kleiner Perkins, First Round Capital, and Index Ventures.Investors in the round: Index Ventures, Khosla Ventures, Kleiner Perkins, Sequoia CapitalIndustry: Artificial Intelligence (AI), Developer APIs, Information TechnologyFounders: Parag AgrawalFounding year: 2023Location: Palo AltoTotal equity funding raised: $260.0M

18. Slash $100.0M

Round: Series CDescription: San Francisco-based Slash provides a financial technology platform that helps businesses manage financial operations through a unified digital system. Founded by Kevin Bai and Victor Cardenas in 2020, Slash has now raised a total of $160M in total equity funding and is backed by Menlo Ventures, Khosla Ventures, Y Combinator, New Enterprise Associates, and Goodwater Capital.Investors in the round: Goodwater Capital, Khosla Ventures, Ribbit Capital, Y CombinatorIndustry: Banking, Financial Services, FinTech, PaymentsFounders: Kevin Bai, Victor CardenasFounding year: 2020Location: San FranciscoTotal equity funding raised: $160.0M

18. Chapter $100.0M

Round: Series EDescription: New York-based Chapter offers a Medicare navigation platform providing advisory services for seniors seeking health coverage. Founded by Cobi Blumenfeld-Gantz, Corey Metzman, and Vivek Ramaswamy in 2013, Chapter has now raised a total of $284M in total equity funding and is backed by Techstars, 8VC, SV Angel, XYZ Venture Capital, and Maverick Ventures.Investors in the round: 8VC, Addition, Fifth Down Capital, Generation Investment Management, Maverick Ventures, Narya Capital, Stripes, Susa Ventures, XYZ Venture CapitalIndustry: Elderly, Health Care, Health Insurance, MedicalFounders: Cobi Blumenfeld-Gantz, Corey Metzman, Vivek RamaswamyFounding year: 2013Location: New YorkTotal equity funding raised: $284.0M

17. Netomi $110.0M

Round: Series CDescription: San Mateo-based Netomi provides Generative AI for enterprises. Founded by Puneet Mehta in 2015, Netomi has now raised a total of $217M in total equity funding and is backed by BoxGroup, Y Combinator, Index Ventures, WndrCo, and Salesforce Ventures.Investors in the round: Industry: Artificial Intelligence (AI), Customer Service, Digital Marketing, Enterprise Software, Machine Learning, SaaS, SoftwareFounders: Puneet MehtaFounding year: 2015Location: San MateoTotal equity funding raised: $217.0M

17. Skydio $110.0M

Round: Series FDescription: San Mateo-based Skydio uses AI to create flying drones that are for consumer, enterprise, and government customers. Founded by Abraham Bachrach, Adam Bry, and Matt Donahoe in 2014, Skydio has now raised a total of $850M in total equity funding and is backed by Andreessen Horowitz, Accel, Gaingels, NVIDIA, and IVP.Investors in the round: Industry: Artificial Intelligence (AI), Drone Management, Drones, Machine Learning, RoboticsFounders: Abraham Bachrach, Adam Bry, Matt DonahoeFounding year: 2014Location: San MateoTotal equity funding raised: $850.0M

16. Starfish Space $111.7M

Round: Series BDescription: Seattle-based Starfish Space develops and manufactures autonomous space vehicles that perform in-orbit, satellite servicing missions. Founded by Austin Link and Trevor Bennett in 2019, Starfish Space has now raised a total of $169.7M in total equity funding and is backed by Gaingels, Alumni Ventures, Shield Capital, Toyota Ventures, and NFX.Investors in the round: Activate Capital Partners, Gaingels, Industrious Ventures, Munich Re Ventures, NFX, NightDragon, Nomi Capital, Overlap Holdings, Point72 Ventures, PSL Ventures, Shield Capital, Toyota VenturesIndustry: Aerospace, Manufacturing, Space Travel, TransportationFounders: Austin Link, Trevor BennettFounding year: 2019Location: SeattleTotal equity funding raised: $169.7M

15. Havra $113.0M

Round: SeedDescription: Mcallen-based Havra is a software company that streamline the global supply chain with insightful software and services. Founded by J. Ayala and W. Steele in 2023, Havra has now raised a total of $115.7M in total equity funding and is backed by Antler, Supply Change Capital, Ollin Ventures, and Audaz Capital.Investors in the round: Industry: Artificial Intelligence (AI), FinTech, Information Technology, LogisticsFounders: J. Ayala, W. SteeleFounding year: 2023Location: McallenTotal equity funding raised: $115.7M

14. Omni $120.0M

Round: Series CDescription: San Francisco-based Omni provides a data collaboration and analytics platform that helps teams explore, model, and share business data in one environment. Founded by Christopher Merrick, Colin Zima, and Jamie Davidson in 2022, Omni has now raised a total of $215.9M in total equity funding and is backed by BoxGroup, First Round Capital, ICONIQ Growth, Theory Ventures, and Quiet Capital.Investors in the round: First Round Capital, Google Ventures, ICONIQ Growth, Redpoint, Theory VenturesIndustry: Analytics, Artificial Intelligence (AI), Business Intelligence, Information Technology, SaaS, SoftwareFounders: Christopher Merrick, Colin Zima, Jamie DavidsonFounding year: 2022Location: San FranciscoTotal equity funding raised: $215.9M

13. Aria Networks $125.0M

Round: Series ADescription: Palo Alto-based Aria Networks develops an AI-powered networking platform that monitors, analyses, and optimises data center performance. Founded by Mansour Karam in 2025, Aria Networks has now raised a total of $125M in total equity funding and is backed by Eclipse, Valor Equity Partners, Sutter Hill Ventures, and Atreides Management.Investors in the round: Atreides Management, Eclipse, Sutter Hill Ventures, Valor Equity PartnersIndustry: AI Infrastructure, Artificial Intelligence (AI), Data Center Automation, Network HardwareFounders: Mansour KaramFounding year: 2025Location: Palo AltoTotal equity funding raised: $125.0M

13. Avoca $125.0M

Round: Series BDescription: New York-based Avoca uses AI agents to handle inbound and outbound interactions, including handling customer calls and managing leads. Founded by Apurva Shrivastava and Tyson Chen in 2022, Avoca has now raised a total of $125.5M in total equity funding and is backed by General Catalyst, BoxGroup, Nexus Venture Partners, Kleiner Perkins, and Y Combinator.Investors in the round: Alt Capital, Amplify Partners, BoxGroup, General Catalyst, Kleiner Perkins, Meritech Capital Partners, Nexus Venture Partners, Y CombinatorIndustry: Artificial Intelligence (AI), Business Process Automation (BPA), SoftwareFounders: Apurva Shrivastava, Tyson ChenFounding year: 2022Location: New YorkTotal equity funding raised: $125.5M

12. Hightouch $150.0M

Round: Series DDescription: San Francisco-based Hightouch is an agentic marketing platform that utilizes a Composable Customer Data Platform (CDP) to enhance marketing efforts. Founded by Josh Curl, Kashish Gupta, and Tejas Manohar in 2018, Hightouch has now raised a total of $332.2M in total equity funding and is backed by Y Combinator, ICONIQ Growth, Sapphire Ventures, Bain Capital Ventures, and Salesforce Ventures.Investors in the round: Amplify Partners, Bain Capital Ventures, Goldman Sachs, ICONIQ Capital, Sapphire Ventures, TD7, Y CombinatorIndustry: Agentic AI, CRM, Developer Platform, Marketing, SaaSFounders: Josh Curl, Kashish Gupta, Tejas ManoharFounding year: 2018Location: San FranciscoTotal equity funding raised: $332.2M

11. Factory $150.0M

Round: Series CDescription: San Francisco-based Factory provides software development agents that integrate into existing engineering workflows and tools. Founded by Eno Reyes and Matan Grinberg in 2023, Factory has now raised a total of $220M in total equity funding and is backed by NVIDIA, BoxGroup, Khosla Ventures, Sequoia Capital, and Insight Partners.Investors in the round: Abstract, Blackstone Group, Evantic Capital, Insight Partners, Khosla Ventures, MANTIS Venture Capital, Sequoia Capital, The Twenty Minute VCIndustry: Agentic AI, Artificial Intelligence (AI), Developer Tools, Software EngineeringFounders: Eno Reyes, Matan GrinbergFounding year: 2023Location: San FranciscoTotal equity funding raised: $220.0M

10. Reliable Robotics $160.0M

Round: Series DDescription: Mountain View-based Reliable Robotics develops automation systems for aircraft that enable remotely operated and autonomous flight operations. Founded by Juerg Frefel and Robert Rose in 2017, Reliable Robotics has now raised a total of $293.5M in total equity funding and is backed by Island Green Capital, Gaingels, Lightspeed Venture Partners, Eclipse, and Coatue.Investors in the round: AE Ventures, Calm Ventures, Coatue, Eclipse, Gaingels, Island Green Capital, KAS Venture Partners, Lightspeed Venture Partners, Mana Ventures, Nimble Partners, Pathbreaker Ventures, Presidio Ventures, RTX Ventures, Socium Ventures, UP Partners, What If VenturesIndustry: Air Transportation, Artificial Intelligence (AI), Autonomous VehiclesFounders: Juerg Frefel, Robert RoseFounding year: 2017Location: Mountain ViewTotal equity funding raised: $293.5M

10. Rogo $160.0M

Round: Series DDescription: New York-based Rogo.ai is an AI platform for finance that automates research, analysis, and financial workflows for investment banks and investors. Founded by Gabriel Stengel, John Willett, and Tumas Rackaitis in 2021, Rogo has now raised a total of $314M in total equity funding and is backed by BoxGroup, Khosla Ventures, Sequoia Capital, Kleiner Perkins, and Alt Capital.Investors in the round: BoxGroup, Evantic Capital, Jack Altman, J.P. Morgan Growth Equity Partners, Khosla Ventures, Kleiner Perkins, MANTIS Venture Capital, Positive Sum, Sequoia Capital, Thrive CapitalIndustry: Analytics, Artificial Intelligence (AI), Business Intelligence, Financial Services, FinTech, Generative AIFounders: Gabriel Stengel, John Willett, Tumas RackaitisFounding year: 2021Location: New YorkTotal equity funding raised: $314.0M

9. Glydways $170.0M

Round: Series CDescription: South San Francisco-based Glydways develops autonomous transportation systems that combine small electric vehicles with dedicated guideways for urban mobility. Founded by Mark Seeger in 2016, Glydways has now raised a total of $382.5M in total equity funding and is backed by Khosla Ventures, Alumni Ventures, UpHonest Capital, Gates Frontier Fund, and New Science Ventures.Investors in the round: ACS Group Directory, Gates Frontier Fund, Khosla Ventures, Mitsui Chemicals, Obayashi Corporation, Suzuki MotorIndustry: Clean Energy, Electric Vehicle, Manufacturing, TransportationFounders: Mark SeegerFounding year: 2016Location: South San FranciscoTotal equity funding raised: $382.5M

8. Hermeus $200.0M

Round: Series CDescription: El Segundo-based Hermeus is a defense aviation company that designs, builds, and tests high-Mach and hypersonic aircraft. Founded by AJ Piplica, Glenn Case, Michael Smayda, and Skyler Shuford in 2018, Hermeus has now raised a total of $356M in total equity funding and is backed by Khosla Ventures, Founders Fund, Bling Capital, 137 Ventures, and Karman Ventures.Investors in the round: 137 Ventures, Bling Capital, Canaan Partners, Circadian Ventures, Cox Enterprises, Destiny (D/XYZ), Founders Fund, Georgia Tech Foundation, GSBackers, IQT, Karman Ventures, Khosla Ventures, RTX Ventures, Socium VenturesIndustry: Aerospace, Air Transportation, Industrial Manufacturing, Manufacturing, MilitaryFounders: AJ Piplica, Glenn Case, Michael Smayda, Skyler ShufordFounding year: 2018Location: El SegundoTotal equity funding raised: $356.0M

8. Flock Safety $200.0M

Round: Series IDescription: Atlanta-based Flock Safety provides end-to-end surveillance solutions to support law enforcement and communities. Founded by Garrett Langley and Matt Feury in 2017, Flock Safety has now raised a total of $1.2B in total equity funding and is backed by Andreessen Horowitz, Y Combinator, Kleiner Perkins, Founders Fund, and SV Angel.Investors in the round: Industry: Manufacturing, Public Safety, Security, SensorFounders: Garrett Langley, Matt FeuryFounding year: 2017Location: AtlantaTotal equity funding raised: $1.2B

7. Valar Atomics $340.0M

Round: Series BDescription: El Segundo-based Valar Atomics develops nuclear energy systems designed to supply industrial-scale power and produce energy-derived products. Founded by Isaiah Taylor in 2023, Valar Atomics has now raised a total of $464M in total equity funding and is backed by Alumni Ventures, Riot Ventures, Contrary, AlleyCorp, and Initialized Capital.Investors in the round: Palmer Luckey, Shyam SankarIndustry: Energy, Nuclear, Oil and Gas, Power GridFounders: Isaiah TaylorFounding year: 2023Location: El SegundoTotal equity funding raised: $464.0M

6. SiFive $400.0M

Round: Series GDescription: San Mateo-based SiFive is a semiconductor company that delivers scalable processor core IP solutions. Founded by Andrew Waterman, Krste Asanovic, and Yunsup Lee in 2015, SiFive has now raised a total of $765.5M in total equity funding and is backed by NVIDIA, Coatue, Apollo, Spark Capital, and Point72.Investors in the round: Apollo, Atreides Management, NVIDIA, Point72, Prosperity7 Ventures, Sutter Hill Ventures, T. Rowe PriceIndustry: Electronics, Manufacturing, Semiconductor, SoftwareFounders: Andrew Waterman, Krste Asanovic, Yunsup LeeFounding year: 2015Location: San MateoTotal equity funding raised: $765.5M

5. Vulcan Elements $430.7M

Round: VentureDescription: Cambridge-based Vulcan Elements is a manufacturer of rare-earth magnets used in critical defense and commercial applications. Founded by John Maslin and Piotr Kulik in 2023, Vulcan Elements has now raised a total of $500.9M in total equity funding and is backed by FJ Labs, nvp capital, Washington Harbour Partners, Ibex Investors, and 1789 Capital.Investors in the round: Industry: Aerospace, Industrial Manufacturing, Manufacturing, National SecurityFounders: John Maslin, Piotr KulikFounding year: 2023Location: CambridgeTotal equity funding raised: $500.9M

You are seconds away from signing up for the hottest list in NYC Tech!

Sign Up Free

4. VAST Data $500.0M

Round: Series FDescription: New York-based VAST Data offers an AI Operating System that integrates storage, database, and compute engine capabilities into a single software platform. Founded by Alon Horev, Jeff Denworth, Renen Hallak, and Shachar Fienblit in 2016, VAST Data has now raised a total of $1.4B in total equity funding and is backed by Norwest, NVIDIA, General Atlantic, New Enterprise Associates, and Bond.Investors in the round: Access Industries, Drive Capital, Fidelity, NVIDIAIndustry: AI Infrastructure, Artificial Intelligence (AI), Database, SoftwareFounders: Alon Horev, Jeff Denworth, Renen Hallak, Shachar FienblitFounding year: 2016Location: New YorkTotal equity funding raised: $1.4B

3. True Anomaly $600.0M

Round: Series DDescription: Centennial-based True Anomaly develops space security technologies, including spacecraft, software platforms, and mission systems for orbital operations. Founded by Even Rogers, Kyle Zakrzewski, and Tom Nichols in 2022, True Anomaly has now raised a total of $1B in total equity funding and is backed by Accel, Menlo Ventures, Eclipse, Paradigm, and 645 Ventures.Investors in the round: 645 Ventures, Accel, ACME Capital, Atreides Management, Eclipse, G Squared, Menlo Ventures, Meritech Capital Partners, Narya Capital, Paradigm, Riot Ventures, Space.VC, The Private Shares Fund, VanEckIndustry: Aerospace, Artificial Intelligence (AI), Manufacturing, Military, National SecurityFounders: Even Rogers, Kyle Zakrzewski, Tom NicholsFounding year: 2022Location: CentennialTotal equity funding raised: $1.0B

2. Slate Auto $650.0M

Round: Series CDescription: Troy-based Slate Auto is an electric vehicle company developing customizable modular electric pickup trucks. Founded by Jeffrey Wilke, Miles Arnone, and William Barker in 2022, Slate Auto has now raised a total of $761M in total equity funding and is backed by General Catalyst, Slauson & Co., Bezos Expeditions, TWG Global, and Thomas Tull.Investors in the round: TWG GlobalIndustry: Automotive, Electric Vehicle, ManufacturingFounders: Jeffrey Wilke, Miles Arnone, William BarkerFounding year: 2022Location: TroyTotal equity funding raised: $761.0M

1. Project Prometheus $10.0B

Round: VentureDescription: San Francisco-based Project Prometheus is an artificial-intelligence company that builds systems for the physical economy. Founded by Jeff Bezos and Vikram Bajaj in 2025, Project Prometheus has now raised a total of $16.2B in total equity funding and is backed by BlackRock, ARCH Venture Partners, DST Global, JPMorgan Chase & Co., and Jeff Bezos.Investors in the round: ARCH Venture Partners, BlackRock, DST Global, JPMorgan Chase & Co.Industry: Artificial Intelligence (AI), Foundational AI, Information Technology, Machine LearningFounders: Jeff Bezos, Vikram BajajFounding year: 2025Location: San FranciscoTotal equity funding raised: $16.2B