The 18 Largest US Funding Rounds of April 2026 – AlleyWatch

April 2026 opened with an announcement. A single $10B spherical to Undertaking Prometheus – Jeff Bezos’s AI firm concentrating on the bodily economic system – set the tone for a month. Leveraging information from CrunchBase, this report tracks the biggest US startup funding rounds of April 2026, overlaying every firm’s spherical kind, founding workforce, business focus, investor syndicate, and whole fairness raised thus far. Past the headline numbers, the offers mirror a decisive shift in enterprise conviction: protection tech, nuclear power, autonomous techniques, and AI infrastructure are not rising themes – they’re the place the most important checks are going

18. Scout AI $100.0M

Spherical: Sequence A
Description: Sunnyvale-based Scout AI develops AI techniques for protection robotics, targeted on enabling autonomous conduct throughout unmanned platforms. Based by Colby Adcock and Collin Otis in 2024, Scout AI has now raised a complete of $115.2M in whole fairness funding and is backed by Gaingels, Draper Associates, Booz Allen Ventures, FJ Labs, and Decisive Level.
Traders within the spherical: Align Ventures, Booz Allen Ventures, Bravo Victor Enterprise Capital, Decisive Level, Disruptive Founders Fund, Draper Associates, Evolution VC Companions, FJ Labs, Heraclitus Capital Administration, Monte Carlo Capital, Neman Ventures, Shane Neman, Sigmas Group, Vaughn Capital Companions
Business: Aerospace, Synthetic Intelligence (AI), Manufacturing
Founders: Colby Adcock, Collin Otis
Founding yr: 2024
Location: Sunnyvale
Whole fairness funding raised: $115.2M

18. Parallel $100.0M

Spherical: Sequence B
Description: Palo Alto-based Parallel develops a brokers and gear APIs for constructing AI that accesses and makes use of the open net. Based by Parag Agrawal in 2023, Parallel has now raised a complete of $260M in whole fairness funding and is backed by Khosla Ventures, Sequoia Capital, Kleiner Perkins, First Spherical Capital, and Index Ventures.
Traders within the spherical: Index Ventures, Khosla Ventures, Kleiner Perkins, Sequoia Capital
Business: Synthetic Intelligence (AI), Developer APIs, Info Expertise
Founders: Parag Agrawal
Founding yr: 2023
Location: Palo Alto
Whole fairness funding raised: $260.0M

18. Slash $100.0M

Spherical: Sequence C
Description: San Francisco-based Slash gives a monetary know-how platform that helps companies handle monetary operations by means of a unified digital system. Based by Kevin Bai and Victor Cardenas in 2020, Slash has now raised a complete of $160M in whole fairness funding and is backed by Menlo Ventures, Khosla Ventures, Y Combinator, New Enterprise Associates, and Goodwater Capital.
Traders within the spherical: Goodwater Capital, Khosla Ventures, Ribbit Capital, Y Combinator
Business: Banking, Monetary Companies, FinTech, Funds
Founders: Kevin Bai, Victor Cardenas
Founding yr: 2020
Location: San Francisco
Whole fairness funding raised: $160.0M

18. Chapter $100.0M

Spherical: Sequence E
Description: New York-based Chapter provides a Medicare navigation platform offering advisory providers for seniors in search of well being protection. Based by Cobi Blumenfeld-Gantz, Corey Metzman, and Vivek Ramaswamy in 2013, Chapter has now raised a complete of $284M in whole fairness funding and is backed by Techstars, 8VC, SV Angel, XYZ Enterprise Capital, and Maverick Ventures.
Traders within the spherical: 8VC, Addition, Fifth Down Capital, Technology Funding Administration, Maverick Ventures, Narya Capital, Stripes, Susa Ventures, XYZ Enterprise Capital
Business: Aged, Well being Care, Well being Insurance coverage, Medical
Founders: Cobi Blumenfeld-Gantz, Corey Metzman, Vivek Ramaswamy
Founding yr: 2013
Location: New York
Whole fairness funding raised: $284.0M

17. Netomi $110.0M

Spherical: Sequence C
Description: San Mateo-based Netomi gives Generative AI for enterprises. Based by Puneet Mehta in 2015, Netomi has now raised a complete of $217M in whole fairness funding and is backed by BoxGroup, Y Combinator, Index Ventures, WndrCo, and Salesforce Ventures.
Traders within the spherical:
Business: Synthetic Intelligence (AI), Buyer Service, Digital Advertising, Enterprise Software program, Machine Studying, SaaS, Software program
Founders: Puneet Mehta
Founding yr: 2015
Location: San Mateo
Whole fairness funding raised: $217.0M

17. Skydio $110.0M

Spherical: Sequence F
Description: San Mateo-based Skydio makes use of AI to create flying drones which might be for shopper, enterprise, and authorities clients. Based by Abraham Bachrach, Adam Bry, and Matt Donahoe in 2014, Skydio has now raised a complete of $850M in whole fairness funding and is backed by Andreessen Horowitz, Accel, Gaingels, NVIDIA, and IVP.
Traders within the spherical:
Business: Synthetic Intelligence (AI), Drone Administration, Drones, Machine Studying, Robotics
Founders: Abraham Bachrach, Adam Bry, Matt Donahoe
Founding yr: 2014
Location: San Mateo
Whole fairness funding raised: $850.0M

16. Starfish House $111.7M

Spherical: Sequence B
Description: Seattle-based Starfish House develops and manufactures autonomous house autos that carry out in-orbit, satellite tv for pc servicing missions. Based by Austin Hyperlink and Trevor Bennett in 2019, Starfish House has now raised a complete of $169.7M in whole fairness funding and is backed by Gaingels, Alumni Ventures, Defend Capital, Toyota Ventures, and NFX.
Traders within the spherical: Activate Capital Companions, Gaingels, Industrious Ventures, Munich Re Ventures, NFX, NightDragon, Nomi Capital, Overlap Holdings, Point72 Ventures, PSL Ventures, Defend Capital, Toyota Ventures
Business: Aerospace, Manufacturing, House Journey, Transportation
Founders: Austin Hyperlink, Trevor Bennett
Founding yr: 2019
Location: Seattle
Whole fairness funding raised: $169.7M

15. Havra $113.0M

Spherical: Seed
Description: Mcallen-based Havra is a software program firm that streamline the worldwide provide chain with insightful software program and providers. Based by J. Ayala and W. Steele in 2023, Havra has now raised a complete of $115.7M in whole fairness funding and is backed by Antler, Provide Change Capital, Ollin Ventures, and Audaz Capital.
Traders within the spherical:
Business: Synthetic Intelligence (AI), FinTech, Info Expertise, Logistics
Founders: J. Ayala, W. Steele
Founding yr: 2023
Location: Mcallen
Whole fairness funding raised: $115.7M

14. Omni $120.0M

Spherical: Sequence C
Description: San Francisco-based Omni gives an information collaboration and analytics platform that helps groups discover, mannequin, and share enterprise information in a single setting. Based by Christopher Merrick, Colin Zima, and Jamie Davidson in 2022, Omni has now raised a complete of $215.9M in whole fairness funding and is backed by BoxGroup, First Spherical Capital, ICONIQ Development, Principle Ventures, and Quiet Capital.
Traders within the spherical: First Spherical Capital, Google Ventures, ICONIQ Development, Redpoint, Principle Ventures
Business: Analytics, Synthetic Intelligence (AI), Enterprise Intelligence, Info Expertise, SaaS, Software program
Founders: Christopher Merrick, Colin Zima, Jamie Davidson
Founding yr: 2022
Location: San Francisco
Whole fairness funding raised: $215.9M

13. Aria Networks $125.0M

Spherical: Sequence A
Description: Palo Alto-based Aria Networks develops an AI-powered networking platform that screens, analyses, and optimises information heart efficiency. Based by Mansour Karam in 2025, Aria Networks has now raised a complete of $125M in whole fairness funding and is backed by Eclipse, Valor Fairness Companions, Sutter Hill Ventures, and Atreides Administration.
Traders within the spherical: Atreides Administration, Eclipse, Sutter Hill Ventures, Valor Fairness Companions
Business: AI Infrastructure, Synthetic Intelligence (AI), Information Heart Automation, Community {Hardware}
Founders: Mansour Karam
Founding yr: 2025
Location: Palo Alto
Whole fairness funding raised: $125.0M

13. Avoca $125.0M

Spherical: Sequence B
Description: New York-based Avoca makes use of AI brokers to deal with inbound and outbound interactions, together with dealing with buyer calls and managing leads. Based by Apurva Shrivastava and Tyson Chen in 2022, Avoca has now raised a complete of $125.5M in whole fairness funding and is backed by Normal Catalyst, BoxGroup, Nexus Enterprise Companions, Kleiner Perkins, and Y Combinator.
Traders within the spherical: Alt Capital, Amplify Companions, BoxGroup, Normal Catalyst, Kleiner Perkins, Meritech Capital Companions, Nexus Enterprise Companions, Y Combinator
Business: Synthetic Intelligence (AI), Enterprise Course of Automation (BPA), Software program
Founders: Apurva Shrivastava, Tyson Chen
Founding yr: 2022
Location: New York
Whole fairness funding raised: $125.5M

12. Hightouch $150.0M

Spherical: Sequence D
Description: San Francisco-based Hightouch is an agentic advertising and marketing platform that makes use of a Composable Buyer Information Platform (CDP) to reinforce advertising and marketing efforts. Based by Josh Curl, Kashish Gupta, and Tejas Manohar in 2018, Hightouch has now raised a complete of $332.2M in whole fairness funding and is backed by Y Combinator, ICONIQ Development, Sapphire Ventures, Bain Capital Ventures, and Salesforce Ventures.
Traders within the spherical: Amplify Companions, Bain Capital Ventures, Goldman Sachs, ICONIQ Capital, Sapphire Ventures, TD7, Y Combinator
Business: Agentic AI, CRM, Developer Platform, Advertising, SaaS
Founders: Josh Curl, Kashish Gupta, Tejas Manohar
Founding yr: 2018
Location: San Francisco
Whole fairness funding raised: $332.2M

11. Manufacturing unit $150.0M

Spherical: Sequence C
Description: San Francisco-based Manufacturing unit gives software program improvement brokers that combine into current engineering workflows and instruments. Based by Eno Reyes and Matan Grinberg in 2023, Manufacturing unit has now raised a complete of $220M in whole fairness funding and is backed by NVIDIA, BoxGroup, Khosla Ventures, Sequoia Capital, and Perception Companions.
Traders within the spherical: Summary, Blackstone Group, Evantic Capital, Perception Companions, Khosla Ventures, MANTIS Enterprise Capital, Sequoia Capital, The Twenty Minute VC
Business: Agentic AI, Synthetic Intelligence (AI), Developer Instruments, Software program Engineering
Founders: Eno Reyes, Matan Grinberg
Founding yr: 2023
Location: San Francisco
Whole fairness funding raised: $220.0M

10. Dependable Robotics $160.0M

Spherical: Sequence D
Description: Mountain View-based Dependable Robotics develops automation techniques for plane that allow remotely operated and autonomous flight operations. Based by Juerg Frefel and Robert Rose in 2017, Dependable Robotics has now raised a complete of $293.5M in whole fairness funding and is backed by Island Inexperienced Capital, Gaingels, Lightspeed Enterprise Companions, Eclipse, and Coatue.
Traders within the spherical: AE Ventures, Calm Ventures, Coatue, Eclipse, Gaingels, Island Inexperienced Capital, KAS Enterprise Companions, Lightspeed Enterprise Companions, Mana Ventures, Nimble Companions, Pathbreaker Ventures, Presidio Ventures, RTX Ventures, Socium Ventures, UP Companions, What If Ventures
Business: Air Transportation, Synthetic Intelligence (AI), Autonomous Automobiles
Founders: Juerg Frefel, Robert Rose
Founding yr: 2017
Location: Mountain View
Whole fairness funding raised: $293.5M

10. Rogo $160.0M

Spherical: Sequence D
Description: New York-based Rogo.ai is an AI platform for finance that automates analysis, evaluation, and monetary workflows for funding banks and traders. Based by Gabriel Stengel, John Willett, and Tumas Rackaitis in 2021, Rogo has now raised a complete of $314M in whole fairness funding and is backed by BoxGroup, Khosla Ventures, Sequoia Capital, Kleiner Perkins, and Alt Capital.
Traders within the spherical: BoxGroup, Evantic Capital, Jack Altman, J.P. Morgan Development Fairness Companions, Khosla Ventures, Kleiner Perkins, MANTIS Enterprise Capital, Optimistic Sum, Sequoia Capital, Thrive Capital
Business: Analytics, Synthetic Intelligence (AI), Enterprise Intelligence, Monetary Companies, FinTech, Generative AI
Founders: Gabriel Stengel, John Willett, Tumas Rackaitis
Founding yr: 2021
Location: New York
Whole fairness funding raised: $314.0M

9. Glydways $170.0M

Spherical: Sequence C
Description: South San Francisco-based Glydways develops autonomous transportation techniques that mix small electrical autos with devoted guideways for city mobility. Based by Mark Seeger in 2016, Glydways has now raised a complete of $382.5M in whole fairness funding and is backed by Khosla Ventures, Alumni Ventures, UpHonest Capital, Gates Frontier Fund, and New Science Ventures.
Traders within the spherical: ACS Group Listing, Gates Frontier Fund, Khosla Ventures, Mitsui Chemical compounds, Obayashi Company, Suzuki Motor
Business: Clear Power, Electrical Car, Manufacturing, Transportation
Founders: Mark Seeger
Founding yr: 2016
Location: South San Francisco
Whole fairness funding raised: $382.5M

8. Hermeus $200.0M

Spherical: Sequence C
Description: El Segundo-based Hermeus is a protection aviation firm that designs, builds, and exams high-Mach and hypersonic plane. Based by AJ Piplica, Glenn Case, Michael Smayda, and Skyler Shuford in 2018, Hermeus has now raised a complete of $356M in whole fairness funding and is backed by Khosla Ventures, Founders Fund, Bling Capital, 137 Ventures, and Karman Ventures.
Traders within the spherical: 137 Ventures, Bling Capital, Canaan Companions, Circadian Ventures, Cox Enterprises, Future (D/XYZ), Founders Fund, Georgia Tech Basis, GSBackers, IQT, Karman Ventures, Khosla Ventures, RTX Ventures, Socium Ventures
Business: Aerospace, Air Transportation, Industrial Manufacturing, Manufacturing, Army
Founders: AJ Piplica, Glenn Case, Michael Smayda, Skyler Shuford
Founding yr: 2018
Location: El Segundo
Whole fairness funding raised: $356.0M

8. Flock Security $200.0M

Spherical: Sequence I
Description: Atlanta-based Flock Security gives end-to-end surveillance options to assist legislation enforcement and communities. Based by Garrett Langley and Matt Feury in 2017, Flock Security has now raised a complete of $1.2B in whole fairness funding and is backed by Andreessen Horowitz, Y Combinator, Kleiner Perkins, Founders Fund, and SV Angel.
Traders within the spherical:
Business: Manufacturing, Public Security, Safety, Sensor
Founders: Garrett Langley, Matt Feury
Founding yr: 2017
Location: Atlanta
Whole fairness funding raised: $1.2B

7. Valar Atomics $340.0M

Spherical: Sequence B
Description: El Segundo-based Valar Atomics develops nuclear power techniques designed to produce industrial-scale energy and produce energy-derived merchandise. Based by Isaiah Taylor in 2023, Valar Atomics has now raised a complete of $464M in whole fairness funding and is backed by Alumni Ventures, Riot Ventures, Opposite, AlleyCorp, and Initialized Capital.
Traders within the spherical: Palmer Luckey, Shyam Sankar
Business: Power, Nuclear, Oil and Fuel, Energy Grid
Founders: Isaiah Taylor
Founding yr: 2023
Location: El Segundo
Whole fairness funding raised: $464.0M

6. SiFive $400.0M

Spherical: Sequence G
Description: San Mateo-based SiFive is a semiconductor firm that delivers scalable processor core IP options. Based by Andrew Waterman, Krste Asanovic, and Yunsup Lee in 2015, SiFive has now raised a complete of $765.5M in whole fairness funding and is backed by NVIDIA, Coatue, Apollo, Spark Capital, and Point72.
Traders within the spherical: Apollo, Atreides Administration, NVIDIA, Point72, Prosperity7 Ventures, Sutter Hill Ventures, T. Rowe Worth
Business: Electronics, Manufacturing, Semiconductor, Software program
Founders: Andrew Waterman, Krste Asanovic, Yunsup Lee
Founding yr: 2015
Location: San Mateo
Whole fairness funding raised: $765.5M

5. Vulcan Parts $430.7M

Spherical: Enterprise
Description: Cambridge-based Vulcan Parts is a producer of rare-earth magnets utilized in essential protection and industrial purposes. Based by John Maslin and Piotr Kulik in 2023, Vulcan Parts has now raised a complete of $500.9M in whole fairness funding and is backed by FJ Labs, nvp capital, Washington Harbour Companions, Ibex Traders, and 1789 Capital.
Traders within the spherical:
Business: Aerospace, Industrial Manufacturing, Manufacturing, Nationwide Safety
Founders: John Maslin, Piotr Kulik
Founding yr: 2023
Location: Cambridge
Whole fairness funding raised: $500.9M

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4. VAST Information $500.0M

Spherical: Sequence F
Description: New York-based VAST Information provides an AI Working System that integrates storage, database, and compute engine capabilities right into a single software program platform. Based by Alon Horev, Jeff Denworth, Renen Hallak, and Shachar Fienblit in 2016, VAST Information has now raised a complete of $1.4B in whole fairness funding and is backed by Norwest, NVIDIA, Normal Atlantic, New Enterprise Associates, and Bond.
Traders within the spherical: Entry Industries, Drive Capital, Constancy, NVIDIA
Business: AI Infrastructure, Synthetic Intelligence (AI), Database, Software program
Founders: Alon Horev, Jeff Denworth, Renen Hallak, Shachar Fienblit
Founding yr: 2016
Location: New York
Whole fairness funding raised: $1.4B

3. True Anomaly $600.0M

Spherical: Sequence D
Description: Centennial-based True Anomaly develops house safety applied sciences, together with spacecraft, software program platforms, and mission techniques for orbital operations. Based by Even Rogers, Kyle Zakrzewski, and Tom Nichols in 2022, True Anomaly has now raised a complete of $1B in whole fairness funding and is backed by Accel, Menlo Ventures, Eclipse, Paradigm, and 645 Ventures.
Traders within the spherical: 645 Ventures, Accel, ACME Capital, Atreides Administration, Eclipse, G Squared, Menlo Ventures, Meritech Capital Companions, Narya Capital, Paradigm, Riot Ventures, House.VC, The Non-public Shares Fund, VanEck
Business: Aerospace, Synthetic Intelligence (AI), Manufacturing, Army, Nationwide Safety
Founders: Even Rogers, Kyle Zakrzewski, Tom Nichols
Founding yr: 2022
Location: Centennial
Whole fairness funding raised: $1.0B

2. Slate Auto $650.0M

Spherical: Sequence C
Description: Troy-based Slate Auto is an electrical automobile firm creating customizable modular electrical pickup vans. Based by Jeffrey Wilke, Miles Arnone, and William Barker in 2022, Slate Auto has now raised a complete of $761M in whole fairness funding and is backed by Normal Catalyst, Slauson & Co., Bezos Expeditions, TWG International, and Thomas Tull.
Traders within the spherical: TWG International
Business: Automotive, Electrical Car, Manufacturing
Founders: Jeffrey Wilke, Miles Arnone, William Barker
Founding yr: 2022
Location: Troy
Whole fairness funding raised: $761.0M

1. Undertaking Prometheus $10.0B

Spherical: Enterprise
Description: San Francisco-based Undertaking Prometheus is an artificial-intelligence firm that builds techniques for the bodily economic system. Based by Jeff Bezos and Vikram Bajaj in 2025, Undertaking Prometheus has now raised a complete of $16.2B in whole fairness funding and is backed by BlackRock, ARCH Enterprise Companions, DST International, JPMorgan Chase & Co., and Jeff Bezos.
Traders within the spherical: ARCH Enterprise Companions, BlackRock, DST International, JPMorgan Chase & Co.
Business: Synthetic Intelligence (AI), Foundational AI, Info Expertise, Machine Studying
Founders: Jeff Bezos, Vikram Bajaj
Founding yr: 2025
Location: San Francisco
Whole fairness funding raised: $16.2B