Delphina, a San Francisco startup that builds AI analytics tools, raised $7.5 million, bringing its total funding to $15 million. Radical Ventures and Costanoa co-led the round, with Tenacity Capital, Fei-Fei Li, Nobel laureate Guido Imbens, and early employees of Anthropic and OpenAI also taking part. The money will fund the Context Factory, a product in which AI agents build and maintain the business context behind trusted answers. It will also pay for growth in go-to-market and customer engineering teams. Business teams now ask 73% of questions on the platform, and CEOs at more than half of its customers use it. At Substack, more than 70% of employees use Delphina. The Context Factory is available now.

Nidus Technologies, a New York startup building robotics AI for defence manufacturers, has raised $30 million. A pre-seed round was led by Costanoa, and a seed round by Kleiner Perkins. Ludlow Ventures, Absolute Partners and several angels also took part. Founded in March by four former Vannevar hardware team members, Nidus says it has booked more than $1 million with unnamed defence industrial customers in four months. It trains AI models on data from teleoperated robot rigs, starting with wire harnesses. The models run alongside a customer's existing robots, so factories need not rebuild their processes. Nidus will use the money to hire in New York and expand data collection and training. It aims to move into tasks such as kitting, pre-assembly and printed circuit boards.