Spur Intelligence, a cybersecurity startup based in Lake Mary, Florida, has raised a $200 million round led by Insight Partners. Spur, founded by two former Defense Department engineers in 2017 — five years before ChatGPT’s public launch — was prescient. The startup’s tech helps enterprises distinguish legitimate human users from increasingly well-hidden bot traffic to help identify fake users and threats. “As sophisticated criminal VPNs, residential proxy networks, and anonymization infrastructure proliferate, organizations are increasingly operating with a critical blind spot: they can see the activity, but not the infrastructure behind it,” Insight’s Thomas Krane said in a written statement. Detecting malicious traffic has, of course, been a hill corporate security teams have been climbing for eons. But nothing compares to the onslaught facing them today. As of mid-2026, bots are now more active on the internet than humans, Cloudflare reported last month. “Thought it would be end of 2027, then early 2027, but agentic traffic growing so fast that bots have now passed human traffic online for the first time in the Internet’s history,” …

GPTZero, the three-year-old AI detection startup that Princeton grad Edward Tian first built as a senior thesis project, has been acquired by Superhuman, the companies announced on Tuesday. Terms of the deal were not disclosed, though Tian told Business Insider that GPTZero amassed more than 19 million registered users and $30 million in annual recurring revenue. In 2024, Tian told TechCrunch that it was profitable. Tian and co-founder CTO Alex Cui, who’d been friends since high school, raised a $3.5 million seed round led by Uncork Capital, followed by a $10 million Series A in June 2024 led by Footwork co-founder Nikhil Basu Trivedi, with several other notable investors including Reach Capital, Jack Altman’s Alt Capital, and Neo. All told, the company raised just $13.5 million. Superhuman — the company formed when Grammarly bought email provider Superhuman last year and rebranded under that name — already had an AI detection tool built into its platform. GPTZero’s mission has been to help humans detect and defend against AI slop. Grammarly’s tool has been designed to help …

Sierra, the customer service agent startup founded by Bret Taylor, announced on Thursday that it has acquired the YC-backed French startup Fragment, which helps businesses integrate AI into workflows.  This is Sierra’s third public acquisition. It previously bought Japan-based enterprise AI solutions company Opera Tech (which it acquired in late March) and voice agent company Receptive AI (which it also announced it acquired in late March). Fragment co-founders Olivier Moindrot and Guillaume Genthial will be joining the Sierra team.  In a blog post, Taylor and his co-founder, Clay Bavor, wrote that Moindrot and Genthial will bring “valuable strength” to Sierra’s “agent development efforts in France.” Terms of the deal were not announced. PitchBook estimates that Fragment raised around $2 million through its seed round. Taylor, who also serves as OpenAI’s chairman of the board, co-founded Sierra alongside Google alum Bavor after stepping down as co-CEO of Salesforce in early 2023. The startup claims Casper, Clear, and Brex as customers and has raised more than $630 million in funding to date, from investors including Sequoia and …