Perplexity AI, an artificial intelligence startup co-founded by Indian-origin Aravind Srinivas, has closed a $500-million round of funding that triples its valuation to $9 billion, Bloomberg reported. In April, Perplexity was valued at $1 billion, a figure that jumped to $3 billion in June after investment from SoftBank Group's Vision Fund 2. Perplexity, founded in 2022, is rival of ChatGPT.