Sierra de Bret Taylor closes nine hundred fifty million round and values fifteen billion

Published on May 14, 2026 | Translated from Spanish

Bret Taylor, chairman of OpenAI and former CEO of Salesforce, has made headlines again. His startup Sierra, specializing in AI agents for customer service, has closed a $950 million funding round led by Tiger Global and GV. The deal pushes its valuation above $15 billion, marking a milestone in the sector. 🚀

A vibrant illustration of a digital AI agent, shaped like a bright blue and green figure, assisting multiple smiling customers in a futuristic call center. In the background, an ascending bar chart shows 15,000M, with the Sierra logo and the Tiger Global and GV brands.

AI agents that execute complete workflows 🤖

Unlike traditional chatbots that only answer questions, Sierra's agents complete complex processes from start to finish. They manage returns, process claims, or update orders without human intervention. They use advanced language models to understand context, access internal systems, and execute actions across multiple platforms. The key lies in their ability to orchestrate tasks without failing along the way.

Goodbye to chatbots that only knew how to say sorry 😅

While old chatbots made you repeat your order number endlessly, Sierra promises to resolve everything in a single message. Of course, when the agent makes a mistake and returns a bicycle instead of a charger, at least you'll know it did so with a lot of artificial intelligence. The fault will lie with the model, not the intern.