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Sierra sierra.ai
Research Team Data Active
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Description
Summary Platform for building enterprise-grade customer service AI agents.
Description Enterprise platform focused on reliable AI-powered customer service interactions and integrations.
Positioning Customer service AI agents
Key facts
HQ location San Francisco, CA, USA
Founded 2023
Employee range 201-500
Company type Private
Pricing model subscription
Last updated Jun 21, 2026
Financials
Revenue estimate $150M ARR (Feb 2026)
Valuation estimate $15B+ (May 2026)
Investments $1.58B total (Series: $75M 2023; $175M late 2024; $350M Sep 2025; $950M May 2026 led by Tiger Global/GV)
Relationships
Target customers Large enterprises and consumer brands
Key competitors Ada, Intercom, Zendesk, Forethought
Known customers Unknown
Segments & Industries
Segments AI Workflows, AI Agents, AI Developer Tools, Knowledge & RAG, AI Quality & Observability, AI Governance & Risk, Call Analysis, Chatbots, Voice AI Agents, STT/TTS Infrastructure, Analytics & BI
Industries Customer Support / CX