Latest Sierra News & Updates

See the latest news and media coverage for Sierra. We track all announcements, press releases, and industry mentions in real time, all in one place.

Company icon
Sierra

Conversational AI platform for customer experience

sierra.ai
Headquarters
San Francisco, United States
Company type
Private company
Number of employees
200–800

Last updated

Latest news about Sierra

Company announcements

  • Sierra

    Sierra introduces context engineering for AI agents

    It manages relevant information dynamically through progressive disclosure, conditions, and context types like journeys, tools, and policies. Sierra's platform automates this with Ghostwriter and SDK.

  • Sierra

    Sierra raises $950 million at over $15 billion valuation

    Led by Tiger Global and GV, the round brings over $1 billion to invest in AI customer experience expansion.

  • Sierra

    Sierra introduces 𝜏-voice benchmark

    It evaluates real-time voice agents on 278 customer service tasks with realistic audio, showing voice capability at 79% of text. Progress from 30% to 67% pass@1 in eight months.

  • Sierra

    Sierra acquires Fragment in France

    The Paris-based AI startup helps businesses scale operations, freeing employees for higher-value work. Fragment's cofounders join Sierra's team.

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