Sierra
Active
Platform for building enterprise-grade customer service AI agents.
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 (~488)
- Funding stage
- Bootstrapped
- Company type
- Private (Private)
- Pricing model
- Subscription (Enterprise SaaS pricing)
- Last updated
- Jun 21, 2026
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)
Target customers
Large enterprises and consumer brands
Key competitors
Ada, Intercom, Zendesk, Forethought
Known customers
Unknown
Classification (raw research text)
- Core focus
- AI customer support automation
- Core industry
- Customer support
- Core category
- Customer service AI agents
Shown verbatim from the research spreadsheet — deriving structured segment/industry tags from this text is a future phase.
Attribute breakdown
- AI Workflows Primary focus
- AI Automation / Business Process Automation Primary focus
- Agent Builder / Agent Configuration Primary focus
- Multi-agent Orchestration / Runtime Secondary feature
- System / API Integration Secondary feature
- Prompt Management / Prompt Engineering Secondary feature
- Retrieval-Augmented Generation Secondary feature
- Enterprise Search / Knowledge Management Secondary feature
- AI Quality Assurance / LLM Evaluation Secondary feature
- AI Observability / Monitoring Secondary feature
- AI Security / Guardrails Secondary feature
- Data Privacy / PII / Confidential AI Secondary feature
- AI Governance / Policy Management Secondary feature
- AI Risk / Compliance Secondary feature
- Human-in-the-Loop Review / Feedback Secondary feature
- Call Transcription / Speech-to-Text Data Capture Secondary feature
- Conversation Intelligence / Speech Analytics Secondary feature
- Text Chatbots / Conversational Assistants Primary focus
- Voice AI Agents Secondary feature
- Voice Infrastructure / STT / TTS Secondary feature
- AI for Customer Experience / Support Automation Primary focus
- Sales / Revenue Intelligence Secondary feature
- Analytics / BI / Decision Intelligence Secondary feature
Show all 32 attributes
- AI Workflows Primary focus
- AI Automation / Business Process Automation Primary focus
- AI Fine-tuning / Custom Model Training Not emphasized
- Agent Builder / Agent Configuration Primary focus
- Multi-agent Orchestration / Runtime Secondary feature
- System / API Integration Secondary feature
- Prompt Management / Prompt Engineering Secondary feature
- Retrieval-Augmented Generation Secondary feature
- Graph RAG / Knowledge Graph Retrieval Not emphasized
- Enterprise Search / Knowledge Management Secondary feature
- AI / LLM Data Pipeline Not emphasized
- Document AI / Document Processing Not emphasized
- Model Deployment / Inference Infrastructure Not emphasized
- Traditional Machine Learning Not emphasized
- AI Quality Assurance / LLM Evaluation Secondary feature
- AI Observability / Monitoring Secondary feature
- AI Security / Guardrails Secondary feature
- Data Privacy / PII / Confidential AI Secondary feature
- AI Governance / Policy Management Secondary feature
- AI Risk / Compliance Secondary feature
- AI Asset Inventory / Model Registry Not emphasized
- Human-in-the-Loop Review / Feedback Secondary feature
- Call Transcription / Speech-to-Text Data Capture Secondary feature
- Conversation Intelligence / Speech Analytics Secondary feature
- Text Chatbots / Conversational Assistants Primary focus
- Voice AI Agents Secondary feature
- Voice Infrastructure / STT / TTS Secondary feature
- AI for Customer Experience / Support Automation Primary focus
- Sales / Revenue Intelligence Secondary feature
- Analytics / BI / Decision Intelligence Secondary feature
- Enterprise App / Internal Tool Builder Not emphasized
- Vertical-Specific AI Not emphasized