Perplexity AI's valuation has held near $20 billion post its September 2025 Series E round at that level, with secondary market marks showing $19.7 billion as of early October 2026 amid an estimated $750 million annualized revenue run rate. Growth has been fueled by product expansions such as its AI agent offerings and enterprise adoption, though the company has not announced a new priced round since January 2026. Reports of Nvidia-led discussions targeting above $30 billion surfaced in August 2026 but remain unconfirmed and unlikely to close before the October 31 deadline. With resolution only weeks away, any shift would hinge on a completed financing or large secondary trade altering the prevailing post-money benchmark.