Nebius eyes AI21 buyout

Nebius, the Amsterdam-based artificial intelligence cloud company, is reportedly in talks to buy AI21 Labs just months after Nvidia’s own talks with AI21 fell apart. Calcalist and The Information both say the new discussions started after the earlier Nvidia process fizzled. (calcalistech.com) (theinformation.com) The price tag in the earlier Nvidia talks was reported at $2 billion to $3 billion, which would have been above AI21’s last publicly announced valuation of $1.4 billion from its 2023 Series C round. AI21 said in November 2023 that round raised $155 million. (calcalistech.com) (ai21.com) Nebius is not a chatbot brand people use at home. It sells the expensive plumbing behind artificial intelligence, renting out Nvidia graphics processing units and data center capacity to companies building models and agents. (nebius.com) (sec.gov) That business has been growing fast. Nebius said on February 12, 2026 that its annualized run-rate revenue had passed $1.2 billion by the end of 2025, and it has told investors it is racing to secure more than 1 gigawatt of power by the end of 2026 for more artificial intelligence computing. (nebius.com) (cdn.prod.website-files.com) AI21 comes from the other side of the market. The Tel Aviv company builds language models and enterprise tools, including its Jamba family for long documents and private deployment, plus a system called Maestro that checks its own work with retrieval, planning, and validation steps. (ai21.com 1) (ai21.com 2) That product mix is a clue to why a buyer would care. AI21 is selling reliability features that large companies ask for, like on-premise deployment, confidence scores, visual workflow tracing, and answers tied back to source documents instead of a black-box guess. (ai21.com 1) (ai21.com 2) (docs.ai21.com) AI21 has been leaning into that pitch for a while. In March 2025, it said Maestro could improve the accuracy of GPT-4o and Claude Sonnet 3.5 by up to 50% on complex enterprise tasks by adding orchestration and verification around the model. (prnewswire.com) Put together, the deal logic is straightforward: Nebius already sells the servers, and AI21 sells software that helps companies trust what comes out of those servers. Buying AI21 would give Nebius a way to move up from renting compute to selling a fuller enterprise stack. (nebius.com) (ai21.com) (theinformation.com) It also says something about where the artificial intelligence market is in April 2026. The hottest targets are no longer just the loudest model makers; they are the companies that can show security, grounding, and fewer wrong answers to banks, insurers, software firms, and support teams. (calcalistech.com) (ai21.com)