What is a Series B?
Series B
Series B funding is designed to scale a startup past the initial growth phase, expanding its market reach, team size, and operations.
Why It Matters for Startups
Directly dictates the cap table and dilution structure during fundraising; understanding Series B helps founders model equity distributions when structuring rounds for expanding sales channels, product lines, and market share.
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
Blacksmith raises $45M to aid AI code validation as agentic development grows
Blacksmith Software Inc. today announced it has raised $45 million in new funding for its continuous integration service, which combines code development with cloud-based testing instead of on the developer's computer. Peak XV Partners led the Series B round, with existing investors Y Combinator...
Vibe Coding Startup Lovable Doubles Valuation to $13.3B with $400M Raise
Lovable Labs Inc. said today it has raised $400 million in Series C funding at a $13.3 billion valuation. The Swedish artificial intelligence coding startup was worth $6.6 billion in December. The company sells a vibe coding service.
Omilia raises $67M to scale its customer support platform
The Series B is the company's second fundraise since it last raised capital in 2020. In that time, it has increased its ARR by 10x to $60 million.
AI makes weather prediction better. Can WindBorne make it lucrative?
WindBorne Systems has raised a $37 million Series B round to scale its weather balloons and AI forecasts.
Freehand Raises $75M Series B To Automate Fortune 500 Supply Chain Spend
Freehand has raised $75 million in Series B funding to scale autonomous AI agent that manage supply chain spend and back-office operations for enterprises.
Greyparrot raises $27M to bring physical AI to recycling as packaging grows more complex
Recycling intelligence platform Greyparrot.ai Ltd. today announced it raised $27 million in Series B funding led by Om Elite Assets Investment to scale its infrastructure globally. Today's recycling process is largely manual and mechanical; it depends heavily on separators acting correctly on...
AI materials science startup CuspAI raises $450M in funding
CuspAI Ltd., a startup using artificial intelligence to discover new materials, today announced that it has raised $450 million in funding. The U.K.-based company also formed a chemical research consortium that includes Nvidia Corp. and Samsung Electronics Co. CuspAI's Series B round values it at...
InstaLILY, a developer of AI teammates that can automate complex, business-specific work, raises $60M
Enterprise automation startup InstaLILY Inc. said today it has closed on a hefty $60 million Series B round of funding that brings its total amount raised to date to almost $100 million. In addition, it launched a new tool that can help companies to quickly build, deploy and then continuously...
Open-source AI Developer Tool Ollama Raises $65M to Grow Its Platform
Ollama Inc., the largest artificial intelligence platform connecting developers to open models, today announced it raised $65 million in Series B funding led by Theory Ventures.
TwelveLabs closes $100M Series B for multimodal video models
TwelveLabs will use the funds to expand research into AI video search engines and intelligence extraction.
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 Partner, Notable Capital, Datadog and Samsung Ventures, and...
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...
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...
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...
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...
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...