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Retell AI

https://www.retellai.com Research Team Data
Active

Developer and business platform for building, testing, deploying, and monitoring production voice AI agents for phone automation.

Retell provides real-time voice AI agent infrastructure with no-code agent setup, phone automation, monitoring, call handling, telephony, and integrations for sales and support operations.

Positioning

#1 AI Voice Agent Platform for Automating Calls

Key facts

HQ location
San Francisco, CA, USA
Founded
2023
Employee range
51-200 (51-200 (third-party/LinkedIn estimate; public count varies))
Funding stage
Bootstrapped
Company type
Private (Private)
Pricing model
Usage Based (Pay-as-you-go / per-minute pricing; enterprise options)
Last updated
Jun 21, 2026

Revenue estimate

Unknown / undisclosed

Valuation estimate

Unknown

Investments

YC-backed; public funding estimates vary (~$5M+ disclosed in third-party sources)

Target customers

Developers, CX teams, sales/support operations, and businesses automating phone calls

Key competitors

Vapi, Bland AI, Synthflow AI, ElevenLabs, LiveKit, Cartesia, Regal

Known customers

Leading support and sales teams; named customers not consistently public

Classification (raw research text)

Core focus
Voice AI agents and call automation infrastructure
Core industry
Customer Support / Sales / Developer Tools
Core category
Voice AI platform

Shown verbatim from the research spreadsheet — deriving structured segment/industry tags from this text is a future phase.

Attribute breakdown

  • AI Workflows Secondary feature
  • AI Automation / Business Process Automation Secondary feature
  • Agent Builder / Agent Configuration Primary focus
  • System / API Integration Secondary feature
  • Prompt Management / Prompt Engineering Secondary feature
  • Retrieval-Augmented Generation Secondary feature
  • AI / LLM Data Pipeline 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 Risk / Compliance Secondary feature
  • AI Asset Inventory / Model Registry 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 Secondary feature
  • Voice AI Agents Primary focus
  • Voice Infrastructure / STT / TTS Primary focus
  • AI for Customer Experience / Support Automation Primary focus
  • Sales / Revenue Intelligence Secondary feature
  • Analytics / BI / Decision Intelligence Secondary feature
  • Enterprise App / Internal Tool Builder Secondary feature
Show all 32 attributes
  • AI Workflows Secondary feature
  • AI Automation / Business Process Automation Secondary feature
  • AI Fine-tuning / Custom Model Training Not emphasized
  • Agent Builder / Agent Configuration Primary focus
  • Multi-agent Orchestration / Runtime Not emphasized
  • 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 Not emphasized
  • AI / LLM Data Pipeline Secondary feature
  • 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 Not emphasized
  • AI Risk / Compliance Secondary feature
  • AI Asset Inventory / Model Registry 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 Secondary feature
  • Voice AI Agents Primary focus
  • Voice Infrastructure / STT / TTS Primary focus
  • AI for Customer Experience / Support Automation Primary focus
  • Sales / Revenue Intelligence Secondary feature
  • Analytics / BI / Decision Intelligence Secondary feature
  • Enterprise App / Internal Tool Builder Secondary feature
  • Vertical-Specific AI Not emphasized