Larridin raised a $30M Series A led by Pelion Ventures, with a16z and Gradient Ventures among the backers, bringing total funding to $47M. The signal: now that AI has gone from a rounding error to a top-five line item on corporate budgets, companies finally want a third-party auditor to tell them whether the money spent on people and agents is actually working.
Arena closed a $200M Series B at a $3.1B valuation, nearly double where it stood ten months ago, co-led by Lightspeed Venture Partners and Khosla Ventures. The signal: once models can recognize they're being tested, static benchmarks stop telling the truth, and a third-party, real-time, human-judged evaluation layer becomes a business of its own.
Raindrop raised a $35M Series A led by CRV, bringing total funding to $50M. The round signals that investors now treat agent observability as a requirement, not a nice-to-have — once an agent runs for hours and calls thousands of tools, no human can watch every step, so someone needs a system built to catch the moments an agent quietly does the wrong thing.