H, the Paris startup founded by Google alums, made a big splash last summer when, out of the blue, it announced a seed round of $220 million before releasing a single product. Three months later, still without a product, that splash started to look like a catastrophic flood when three of the company’s five co-founders left over “operational and business disagreements.” But the company has kept swimming, and today it’s announcing its first product: Runner H, an “agentic” AI aimed at businesses an...