Sierra upgrades its Ghostwriter AI agent builder
Upstarts reports that Ghostwriter is now more proactive, citing Sierra co-founder Clay Bavor. The company is expanding its focus beyond customer service into revenue use cases.
TLDR
Upstarts reports that Sierra shipped an upgrade to Ghostwriter on September 28, 2026. Co-founder Clay Bavor told the outlet the AI agent builder is now more proactive. Sierra is broadening its focus beyond customer service into revenue use cases; Upstarts describes the company as valued at $15.8 billion.
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