AI startup Perplexity's valuation rose to $20 billion in fresh funding talks. It's a $2 billion jump from its last fundraise in July.

The unsolicited bid was sent to Alphabet’s Google ahead of a US court decision that could force the giant search group to sell the browser.

The US-based AI start-up offers $34.5 billion for Google’s Chrome at a time when analysts are warning of a pending bubble in AI stock.