The second major round of venture funding, focused on scaling the business to a larger market.
Series B funding is the second major round of institutional venture capital, typically raised when a company has proven its business model and needs capital to scale operations, expand into new markets, and accelerate growth.
Series B rounds typically range from $15 million to $50 million, with valuations between $50 million and $200 million. At this stage, companies are expected to have significant revenue, a proven go-to-market engine, and clear competitive advantages.
Full Series B guide · the Series B rounds we track are listed below.
$30.5B raised across 181 disclosed Series B deals.
Latest round · Sep 23, 2026 · RSS
| Date | Company | Amount | Round | Sector | Country | Lead investors |
|---|---|---|---|---|---|---|
| Oct 08, 26 | Arena Arena is an AI evaluation platform that measures frontier AI models and agents for real-world alignment with human intent. They have raised $200 million in Series B funding at a $3.1 billion valuation to advance their mission. The company also launched the Arena Alignment Index to measure how AI deviates from human values. | $200.0M | Series B | AI | United States | Lightspeed Venture Partners, Khosla Ventures, Salesforce Ventures+5 |
| Oct 08, 26 | Gardens Interactive Gardens Interactive, founded by industry veterans behind games like Journey and Sky: Children of the Light, is developing its first title, Project Gardens. This multiplayer game is described as a "shared fantasy adventure" with "social roleplay elements," aiming to empower players to create experiences and build lasting relationships. The company seeks to become a global leader in social entertainment. | $35.0M | Series B | ConsumerTech | Undisclosed | Lightspeed Venture Partners, Zenith Capital, Sequoia Capital+5 |
| Oct 08, 26 | Vesta Vesta provides an AI-native loan origination system (LOS) designed to streamline mortgage processes. The platform integrates human staff and AI agents to automate tasks like underwriting, condition clearing, and closing reviews. This Series B funding will support Vesta's expansion, aiming to reduce origination costs and increase efficiency for lenders. | $30.0M | Series B | Fintech | United States | Conversion Capital, New American Funding, Pennymac+5 |
| Oct 08, 26 | Namespace Namespace has raised €37 million in Series B funding to fuel its expansion into the US market and further develop its developer infrastructure. The company focuses on providing tools and services for developers, aiming to streamline their workflows and enhance productivity. | $40.0M | Series B | SaaS | Undisclosed | Undisclosed |
| Oct 08, 26 | Mecka AI Mecka AI is a startup that collects and analyzes human motion data to train humanoid and other robots. They pay individuals to record themselves performing everyday tasks while wearing sensors. This Series B funding, led by Sequoia, will help them scale their operations and compete in the growing robotics data market. | $60.0M | Series B | Robotics | United States | Sequoia Capital, Nvidia, M12 |
| Oct 07, 26 | Type One Energy Type One Energy is developing commercial fusion power plants using its FusionDirect™ technology. The company aims to industrialize fusion energy through a capital-efficient, partner-based OEM business model, leveraging established industry leaders. This $200 million Series B financing will support its Project Infinity, including the Infinity One engineering prototype and the Infinity Two commercial plant. | $200.0M | Series B | ClimateTech | United States | Breakthrough Energy Ventures, Clutterbuck Capital, Lowercarbon Capital+2 |
| Oct 07, 26 | Polaris Electro-Optics Polaris Electro-Optics, a CU Boulder spinout, has raised $50 million in Series B funding to commercialize its FenGlass technology for AI data center infrastructure. Their proprietary material enhances electro-optic modulators, enabling faster data transmission with lower power consumption. The company plans to use the funds to expand its product portfolio, scale production, and hire engineers, targeting its first product launch in 2027. | $50.0M | Series B | DeepTech | United States | Walden Catalyst Ventures, Socratic Partners, Cambium Capital+5 |
| Oct 07, 26 | Stuut Stuut is an AI company focused on expanding AI agents across the order-to-cash process. This Series B funding will support their expansion efforts. | $52.5M | Series B | AI | Undisclosed | Undisclosed |
| Oct 06, 26 | Beyond Appliances Beyond Appliances is a smart kitchen appliance company that has raised ₹110 crore in Series B funding. The company plans to use the capital for R&D, a new manufacturing plant, and expansion into new kitchen product categories and offline retail presence. They aim to become a broader smart kitchen appliances company targeting ₹500 crore in ARR within three years. | $13.2M | Series B | ConsumerTech | India | Fireside Ventures, Dharana Capital |
| Oct 05, 26 | Arlington maritime startup | $140.0M | Series B | Other | Undisclosed | Undisclosed |
| Oct 05, 26 | Pro Shop Pro Shop is a media startup focused on the golf industry. They have raised $24 million in a Series B funding round. The round was led by Arthur Blank's office. | $24.0M | Series B | ConsumerTech | Undisclosed | Arthur Blank's office |
| Oct 03, 26 | Reco AI Security Reco AI Security provides a platform for governing AI agents across SaaS environments. The company is shifting from mapping SaaS applications to securing autonomous software that acts through them. This funding round aims to expand their agent security platform and capture a growing market. | $140.0M | Series B | Cybersecurity | United States | AT&T Ventures, Forestay Capital, Quadrille Capital |
| Oct 02, 26 | GMI Cloud GMI Cloud is an AI-native cloud provider offering high-performance GPU infrastructure and inference services. They aim to accelerate global AI infrastructure expansion, serving both U.S. AI companies and enterprises in the Asia-Pacific region. This funding will expand their GPU capacity across the U.S., Taiwan, and Southeast Asia. | $668.0M | Series B | AI | United States | ARCHIV, NVIDIA, CTBC+5 |
| Oct 02, 26 | Instinct Instinct is a personal AI assistant that understands user workflows and priorities, capable of interacting with phones and computers like a human. The startup has experienced rapid growth, reaching a $10 billion valuation in less than a year and approaching $1 billion in annual transaction volume, with travel being a significant component. | $1.0B | Series B | AI | United States | Sequoia Capital, Benchmark Capital, Coatue |
| Oct 01, 26 | Efficient Computer | $97.0M | Series B | AI | Undisclosed | Undisclosed |
| Oct 01, 26 | Seeds Fincap Seeds Fincap is an NBFC that provides loans to underserved individuals and MSMEs, offering credit ranging from Rs 50,000 to Rs 10 lakh using a cash-flow-based approach. The company aims to expand into new markets and strengthen its branch network, technology, and risk management capabilities with its recent Series B funding. | $10.4M | Series B | Fintech | India | Michael & Susan Dell Foundation, Z47, Lok Capital+2 |
| Sep 23, 26 | Mojave Energy Systems Mojave Energy Systems is an HVAC startup that has developed the ArctiDry platform, which uses patented liquid desiccant technology to control humidity and temperature independently. Their systems offer significant energy savings and faster payback periods compared to traditional HVAC systems, targeting commercial buildings in sectors like grocery, industrial, healthcare, hospitality, and education. This funding will accelerate their sales growth, manufacturing expansion, and product development. | $19.0M | Series B | ClimateTech | United States | Fairtree Elevant Ventures, River Bay Investments, At One Ventures+5 |
| Sep 21, 26 | HEO HEO develops and deploys cameras in space to inspect and monitor satellites for allied nations, with applications in both commercial and defense sectors. The company has secured a significant Series B funding round and a major contract to expand its surveillance network, particularly into Geostationary Earth Orbit (GEO). | $37.0M | Series B | DeepTech | Australia | Beaten Zone Venture Partners, National Reconstruction Fund (NRF), Airtree+5 |
| Sep 19, 26 | Ryft Ryft is a Manchester-based payments company that builds payment solutions for marketplaces, platforms, and multi-location businesses. They help manage seller onboarding and complex transaction flows through a single integration. This Series B funding will support their expansion into Europe and the US, accelerate product development, and move upmarket. | $25.0M | Series B | Fintech | United Kingdom | Gresham House Ventures, Pembroke VCT, Ingenii Capital+1 |
| Sep 18, 26 | Mazama Energy Mazama Energy is a geothermal startup developing technology to generate clean electricity from superhot rocks. The company aims to provide continuous, carbon-free power for data centers and other energy-intensive operations. This Series B funding will enable the development of horizontal wells capable of generating significant electricity per well. | $135.0M | Series B | ClimateTech | United States | Centaurus Capital, Doerr Capital, ConocoPhillips+5 |
| Sep 18, 26 | Luzern Risk Luzern Risk has raised $45 million in a Series B funding round to scale its AI-native captive insurance platform. The company aims to make captive insurance simpler and faster to deploy for mid-market companies facing rising traditional insurance premiums. Their platform handles the entire lifecycle of a captive, from evaluation and formation to ongoing management. | $45.0M | Series B | AI | United States | Insight Partners, Trust Ventures, Caffeinated Capital |
| Sep 18, 26 | Adaptive Adaptive is developing agentic accounting software for the construction industry. This funding round aims to advance their technology and expand their reach within the sector. The company focuses on automating financial processes for construction businesses. | $30.0M | Series B | Fintech | Undisclosed | Tidemark |
| Sep 18, 26 | MIND Security MIND Security is an Israeli cybersecurity startup specializing in data loss prevention (DLP) software. Their AI-based platform identifies sensitive corporate data and prevents leaks across applications, endpoints, and AI agents, addressing the challenges posed by generative AI. The company has raised $72 million in Series B funding, bringing its total to over $112 million, to expand its AI capabilities and product development teams. | $72.0M | Series B | Cybersecurity | Israel | Crosspoint Capital Partners, YL Ventures, Paladin Capital Group |
| Sep 16, 26 | Arcee Arcee is a US enterprise AI startup that builds open-weight models, allowing companies to run advanced AI without sharing data with providers like OpenAI. They have raised $150 million in a Series B round at a $1 billion pre-money valuation to develop new models and products, aiming to compete with China in the open-weight AI space. | $150.0M | Series B | AI | United States | Vista Equity Partners, Cambium Capital, Emergence Capital+5 |
| Sep 09, 26 | Split Pay Split Pay is a fintech startup that helps users manage their paychecks and bills by fronting up to 50% of a bill for up to 30 days, bridging the gap between monthly bills and bi-weekly paychecks. They have raised $125 million across Series A and B rounds, with Khosla Ventures leading both, to further develop their AI-driven underwriting and expand their services. | $125.0M | Series B | Fintech | United States | Khosla Ventures, Thrive Capital, Max Levchin |
| Sep 07, 26 | Immediate Immediate has raised $13 million in Series B funding led by BankTech Ventures to expand from an employer-focused earned wage access platform into a broader financial infrastructure company. The capital will accelerate product development, expand strategic partnerships, and grow its private-label Embedded EWA platform for financial institutions. Immediate aims to connect employers, employees, and financial institutions around liquidity and financial wellness. | $13.0M | Series B | Fintech | United States | BankTech Ventures, Castle Creek Launchpad, BankSouth+1 |
| Sep 05, 26 | XDOF | $1.2B | Series B | Undisclosed | Undisclosed | Undisclosed |
| Sep 05, 26 | Gimlet Labs Gimlet Labs provides AI inference infrastructure by building software and infrastructure that allows multiple types of processors to work together. Their platform supports hardware from six semiconductor manufacturers, breaking down AI workloads into stages that can be routed to the most suitable processor for cost and speed optimization. The company is also expanding into data center infrastructure to support its multi-silicon approach. | $300.0M | Series B | AI | United States | Andreessen Horowitz, Arm Holdings, Microsoft’s venture capital arm M12+1 |
| Sep 04, 26 | iPronics iPronics is a Valencia-based company specializing in silicon photonics-based optical circuit switching for AI infrastructure. The company aims to accelerate the commercialization of optical networking solutions, enabling data centers to fully utilize their GPUs without compromising performance. | $125.0M | Series B | DeepTech | Spain | Maverick Silicon, Light Street Capital, NVIDIA+5 |
| Sep 03, 26 | Superluminal Medicines Superluminal Medicines is a biotechnology company using AI and machine learning for drug discovery. They focus on rare genetic forms of obesity and hypothalamic obesity. This Series B funding will advance their lead program for rare genetic forms of obesity toward a first clinical trial. | $60.0M | Series B | Health | United States | BVF Partners, L.P., Deep Track Capital, Perceptive Advisors+5 |
| Sep 03, 26 | Comet Comet is a company that has recently secured funding to enhance its operations. It focuses on providing innovative solutions in the consumer technology space. This Series B funding round will help Comet expand its market reach and improve its offerings. | $11.8M | Series B | ConsumerTech | India | Verlinvest |
| Sep 02, 26 | HiddenLayer HiddenLayer is an AI security startup that provides tools to protect AI models, agents, and workflows from adversarial attacks, vulnerabilities, and malicious code injections. The company primarily serves financial services and large tech companies, and has contracts with the Department of Defense and intelligence community. This funding round will help expand their sales and distribution efforts as they grow their product offerings. | $100.0M | Series B | AI | United States | Delta-v Capital, Ten Eleven Ventures, Morgan Stanley+2 |
| Sep 01, 26 | Felix Pago Felix Pago is a fintech company that specializes in payment solutions. It aims to streamline transactions for businesses, making it easier for them to manage payments efficiently. The recent $200 million Series B funding will help accelerate its growth and expand its offerings. | $200.0M | Series B | Fintech | Undisclosed | Undisclosed |
| Sep 01, 26 | Smack Technologies Smack Technologies is a defense startup focused on integrating artificial intelligence into wearable devices for military applications. Their flagship product, Alpha, is a wrist-worn device designed to provide real-time data to operators in the field, enhancing decision-making capabilities. The recent $61 million funding will support the development of this innovative technology. | $61.0M | Series B | DeepTech | United States | Undisclosed |
| Sep 01, 26 | VAST VAST has raised $446 million across its Series B and B+ funding rounds to address the high upfront costs of building complex AI 3D models. The company aims to revolutionize the generative AI 3D industry by providing the necessary infrastructure and computational power, which is currently a significant bottleneck for developers and creators. | $446.0M | Series B | AI | Undisclosed | Vision Partners China, Perfect World, BlueFocus+4 |
| Aug 30, 26 | Quaise Energy Quaise Energy is an American startup focused on developing superhot geothermal energy technology. The company aims to drill deep into the earth to create wells that can reach temperatures between 300 °C and 500 °C, significantly increasing the energy output compared to traditional geothermal methods. This funding round will support their Obsidian Project in Oregon, which seeks to establish the world's first commercial superhot geothermal plant. | $180.0M | Series B | ClimateTech | United States | Prelude Ventures, JERA, Idemitsu Kosan+1 |
| Aug 29, 26 | Even Healthcare Even Healthcare is a healthtech startup focused on expanding its managed-care hospital network and enhancing integrated healthcare delivery. The company aims to leverage digital technologies, including AI-powered tools, to improve healthcare services and telemedicine capabilities. | $22.0M | Series B | Health | India | Khosla Ventures, DLB Ventures, Simon Fiduciaria+2 |
| Aug 29, 26 | Instinct Instinct is an AI personal assistant startup that has developed a system capable of connecting with users' applications and devices to perform everyday tasks. The company targets consumers looking for a more efficient way to manage their daily activities through AI technology. This funding round highlights the growing investor interest in AI agents that can autonomously complete tasks rather than just serve as conversational chatbots. | $250.0M | Series B | AI | United States | Benchmark, Index Ventures |
| Aug 28, 26 | Yardstik Yardstik offers a Human Trust Platform that integrates background screening, identity verification, fraud detection, and continuous post-hire monitoring. The company targets businesses looking to enhance workforce protection beyond initial hiring checks. This funding round will support the development of additional monitoring services and automated alerts. | $30.0M | Series B | SaaS | United States | Harbert Growth Partners, Rally Ventures, MissionOG+3 |
| Aug 26, 26 | Breedr Breedr is a platform that develops digital records for livestock management. It aims to bring more ranchers and farmers onto its platform to capture valuable data points, including genomic data. The recent funding will help Breedr expand its operations globally. | $24.3M | Series B | Other | United Kingdom | Partech, Latitude, Phoenix Court+2 |
| Aug 26, 26 | Standard Metrics Standard Metrics is an AI-driven portfolio management platform designed for venture capital and private equity firms. The company aims to resolve inefficiencies in investor relations across private markets by providing tools for portfolio performance and investment data. This funding round will help expand its AI capabilities and reach a wider base of private market investors. | $20.0M | Series B | Fintech | United States | 8VC, Salesforce Ventures, Spark Capital+5 |
| Aug 25, 26 | Stability AI Stability AI is a generative AI company that develops creative tools for producers, musicians, and storytellers. The company focuses on building industry-defining technology alongside artists and rights holders, emphasizing the use of responsibly trained generative AI models. This funding round will help expand its product suite and professional services. | $76.0M | Series B | AI | United States | Universal Music Group, Sony Music Group, Warner Music Group+5 |
| Aug 24, 26 | Generalist AI Generalist AI is developing embodied AI foundation models that provide robots with flexible, general-purpose intelligence for real-world tasks. The company targets sectors such as manufacturing, logistics, and healthcare, aiming to revolutionize how robots operate in various environments. With a total capital raised exceeding $650 million, Generalist AI is rapidly advancing in the competitive field of AI robotics. | $200.0M | Series B | Robotics | United States | 8VC |
| Aug 24, 26 | Xenter Xenter is a TechMed company that has developed a healthcare intelligence platform for diagnostic evaluation and wireless medical devices. It focuses on capturing Physical Intelligence data over its XenFi wireless ecosystem, aiming to transform healthcare data utilization in hospitals and physicians' offices. | $58.3M | Series B | Health | United States | existing shareholders, prominent family offices, healthcare investors |
| Aug 23, 26 | AllHome AllHome is a home improvement startup founded by the creators of PharmEasy. The company aims to build a house-of-brands model, focusing on manufacturing across various home improvement products, which allows for better control over quality and pricing. | $20.9M | Series B | ConsumerTech | India | Bessemer Venture Partners, Stride Ventures |
| Aug 18, 26 | Wellinks Wellinks is a leader in cardiopulmonary care, focusing on predictive care solutions for chronic respiratory diseases. The company aims to expand patient access to its FDA-cleared Spire Remote Patient Monitoring System, which helps identify early physiologic changes associated with clinical deterioration. | $10.0M | Series B | Health | United States | UMass Memorial Health, inside investors |
| Aug 18, 26 | Computomics Computomics is a Tübingen-based BioTech research company that builds machine learning models to forecast how specific genotypes will perform under various environmental conditions. Their climate-smart breeding platform helps crop breeders improve resilience against heat and drought, addressing the challenges posed by climate change on agricultural yields. | $6.7M | Series B | ClimateTech | Germany | Convent Capital Agri Food Fund, High-Tech Gründerfonds (HTGF), MBG Baden-Württemberg+1 |
| Aug 18, 26 | SweGaN SweGaN is a DeepTech company specializing in the design, development, and manufacturing of gallium nitride on silicon carbide (GaN-on-SiC) epitaxial wafers. The company serves diverse market sectors, including telecommunications and electric vehicles, and is notable for its patented growth technologies that enhance device performance and reduce energy consumption. | $14.0M | Series B | DeepTech | Sweden | Thisbe AB, North Ventures |
| Aug 17, 26 | Wispr Wispr is a startup known for its AI dictation tool, which has recently expanded into new areas such as meeting note-taking. The company aims to improve speech understanding quality and has raised significant funding to enhance its product offerings and market presence. | $280.0M | Series B | AI | United States | Menlo Ventures, Notable Capital, NEA+5 |
| Aug 15, 26 | Commonwealth Fusion Systems Commonwealth Fusion Systems (CFS) is focused on developing fusion power technology to generate nearly limitless energy. The company is building Sparc, a power plant designed to achieve scientific breakeven by 2027, and has raised a total of $3.94 billion in funding to date. | $1.0B | Series B | ClimateTech | United States | Breakthrough Energy Ventures, The Engine, Bill Gates |
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