Will's Blog: Source: Sierra, which builds AI customer service agents, nears a $350M raise at a $10B valuation, up from $4.5B in October 2024, and is set to top $100M in ARR (Ina Fried/Axios)

3 September 2025

Source: Sierra, which builds AI customer service agents, nears a $350M raise at a $10B valuation, up from $4.5B in October 2024, and is set to top $100M in ARR (Ina Fried/Axios)

Ina Fried / Axios:
Source: Sierra, which builds AI customer service agents, nears a $350M raise at a $10B valuation, up from $4.5B in October 2024, and is set to top $100M in ARR — Sierra, which builds custom AI agents for enterprise customer service, is nearing a deal for a $350 million financing round …

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