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What is a Series B?

Definition

Series B

Series B funding is designed to scale a startup past the initial growth phase, expanding its market reach, team size, and operations.

Detailed Deep Dive

Series B funding is designed to scale a startup past the initial growth phase, expanding its market reach, team size, and operations. Startups raising Series B rounds have established product-market fit, proven business models, and significant recurring revenues. The capital is used to expand sales and marketing teams, invest in research and development, and potentially pursue international expansion. Valuation at Series B is heavily based on financial metrics, user growth rates, and competitive market positioning.

Frequently Asked Questions

Q:How is a Series B valuation determined?

Series B valuations are determined primarily by financial performance metrics, recurring revenue scale, historical growth rates, and competitive positioning.

Q:What is the capital used for in a Series B round?

It is typically used to scale sales and marketing teams, accelerate product development, and expand into new markets.

Quick Facts

  • CategoryFunding
  • Key ApplicationExpanding sales channels, product lines, and market share

Coverage Trend12 Weeks

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Series B Media Coverage & Intelligence

SiliconANGLEJul 1, 2026

TwelveLabs raises $100M to bring superintelligence to AI video models

TwelveLabs Inc., the developer of generative artificial intelligence foundation model that can understand videos like humans, today announced it has raised $100 million in early funding to expand beyond simple understanding to achieve holistic intelligence. The Series B round was co-led by NEA and

SiliconANGLEJun 26, 2026

Patronus AI grabs $50M in funding to stress-test AI agents in simulated environments

Fast-growing world model startup Patronus AI Inc. is priming itself for even more rapid growth after raising $50 million in Series B funding today. The round was led by Greenfield Partners and saw the participation of Lightspeed Venture Partners, Notable Capital, Datadog and Samsung Ventures, and br

Crunchbase NewsJun 24, 2026

Exclusive: XCures Lands $46M Series B To Clean Up Messy Medical Records With AI

XCures, a startup that uses AI to streamline patient data and medical records, has closed a Innovius Capital-led $46 million Series B financing round, it tells

SiliconANGLEJun 17, 2026

AI cyber warfare startup Twenty raises $100M at $1B valuation

Twenty Inc., a startup that develops cyber warfare software for the U.S. military and intelligence community, has raised $100 million in funding. Accel led the Series B investment. Twenty stated in its announcement of the deal today that Friends & Family Capital, Point72 Ventures and Caffeinated Cap

SiliconANGLEJun 17, 2026

Odyssey raises $310M at $1.45B valuation to transform AI model simulation

Odyssey, an artificial intelligence lab building world models, today announced it has raised $310 million in early-stage funding at a $1.45 billion valuation. Natural Capital led, and Amazon.com Inc., AMD Ventures, GV, EQT, IQT and others also joined the Series B round. Existing investors also joine

Jeff Bezos' Prometheus raises $12B to accelerate industrial engineering projects
SiliconANGLEJun 11, 2026

Jeff Bezos' Prometheus raises $12B to accelerate industrial engineering projects

Prometheus Inc., an artificial intelligence startup co-led by Amazon.com Inc. founder Jeff Bezos, has raised $12 billion in funding. Axios reported today that the Series B round values the company at $41 billion. The round included contributions from Bezos, JPMorgan, BlackRock, Goldman Sachs, DST Gl