EliseAI raised a $350M Series F follow-on round at a $4 billion valuation, doubling its valuation from its Series E last August, co-led by Andreessen Horowitz and Bessemer Ventures. Founded in 2017 to automate administrative and operational work for housing and healthcare, the company said its software is used by 1 in 6 apartments in the U.S. and that it passed $200 million in ARR this summer. The announcement did not disclose a specific use of proceeds, but pointed to recent product expansion with the early September launch of Apollo, an AI teammate built natively into its platform to act across leasing, maintenance and renewals.