Whatnot and Polymarket fuel big rounds as markets heat up

What's happened

Whatnot has topped $8 billion in gross merchandise volume as buyers grow and new funding accelerates tools for sellers; Polymarket is talks for a round valuing the firm north of $20 billion after reporting over $1 billion in annualized revenue since May.

What's behind the headline?

Analysis

The surge in late-stage funding signals continued investor appetite for niche marketplaces that leverage AI and streamlined seller tools.
Whatnot’s growth underscores the viability of live commerce beyond traditional e-commerce, with 650k new users weekly and a projected push to expand toolsets for sellers.
Polymarket’s valuation talks reflect strong demand for regulated prediction markets, with the U.S. exchange posting north of $100 million daily notional volume and international volume exceeding $150 million.

How we got here

The latest funding rounds and growth figures come as live marketplaces and prediction platforms attract massive investor interest. Whatnot’s Series G follows a string of rounds fueling growth, while Polymarket is pursuing a new round after launching a regulated U.S. exchange and reporting >$1 billion in annualized revenue.

Our analysis

- Business Insider UK reports Lovable’s platform growth and investor interest in vibe-coding startups, highlighting $400 million ARR and 60 million projects on the platform. - CNBC covers Whatnot’s Series G valuing the company above $20 billion and its plan to enhance seller tools and AI integration, noting a $8 billion GMV milestone and previous rounds totaling ~ $1.5B. - CNBC also notes Polymarket’s talks for a fundraising round valued north of $20 billion, tied to >$1B annualized revenue since May, and compares to Kalshi’s $22B valuation.

Go deeper

How will these rounds affect competition among live marketplaces?
What AI tools are being deployed to help sellers on these platforms?
When might Polymarket close a new round and what milestones will be needed?