# Retell AI

> Retell AI is a voice-first platform for building, deploying, and managing AI agents that make and take phone calls. Founded in 2023 and backed by Y Combinator, it lets businesses in healthcare, finance, insurance, logistics, and retail stand up human-sounding call agents in days rather than months. Agents book appointments, qualify leads, run outbound campaigns, transfer to humans, and log post-call analytics across voice, chat, and SMS. With sub-600ms latency, 50+ language support, and HIPAA/SOC2/GDPR compliance, Retell reached more than $50M ARR and powers over 50 million calls a month on roughly $5M of raised capital.

- **Founded:** 2023
- **Headquarters:** San Francisco, California, United States
- **Founders:** Bing Wu (Co-Founder & CEO), Zexia Zhang (Co-Founder & CTO), Evie Wang (Co-Founder & CMO), Weijia Yu (Co-Founder), Todd Li (Co-Founder)
- **Team size:** ~30 employees
- **Products:** Voice Agent Platform, Build tools, Deploy tools, Monitor tools, Multichannel agents
- **Notable:** Surpassed $50M ARR while powering 50M+ AI phone calls per month, Reached that scale on roughly $5M of total funding - a widely cited example of AI capital efficiency, Named to Wing VC's Enterprise Tech 30 (2026) list as a top early-stage company

## Products & services

- **Voice Agent Platform** — LLM-powered platform to build, deploy, and manage AI voice agents for inbound and outbound phone calls, with a drag-and-drop conversation flow builder, guardrails, and full control over agent behavior.
- **Build tools** — Call transfer, appointment booking, knowledge base grounding, and IVR navigation, plus custom functions so agents can update records and process actions mid-call.
- **Deploy tools** — Batch calling, branded caller ID, and verified phone numbers to run high-volume outbound campaigns at scale.
- **Monitor tools** — Post-call analysis and AI-driven quality assurance to review outcomes and improve agent performance.
- **Multichannel agents** — Agents that operate across voice call, chat, SMS, and API, letting call centers deploy sales and support across channels.

## Achievements

- Surpassed $50M ARR while powering 50M+ AI phone calls per month
- Reached that scale on roughly $5M of total funding - a widely cited example of AI capital efficiency
- Named to Wing VC's Enterprise Tech 30 (2026) list as a top early-stage company
- Achieved HIPAA, SOC2 Type II, and GDPR compliance
- Sub-600ms conversational latency with support for 50+ languages
- Backed by Y Combinator and prominent operators including Aaron Levie and Michael Seibel

## Latest updates

- **2026-01** — Named to Wing VC's Enterprise Tech 30 2026 list, recognized among top early-stage enterprise tech companies.
- **2026-01** — Reported crossing $50M ARR while powering more than 50 million AI phone calls per month.
- **2025-01** — Upgraded platform to deploy AI sales and support agents across voice, chat, email, and SMS; revenue reported above $40M ARR.
- **2024-08** — Announced $4.6M seed round led by Alt Capital with Y Combinator and Carya Venture.

## Links

- Website: https://www.retellai.com
- LinkedIn: https://www.linkedin.com/company/retellai
- Twitter/X: https://x.com/retellai
- YouTube: https://www.youtube.com/@retellai

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Profile page: https://yespress.io/retell-ai
Published by YesPress — https://yespress.io
Last updated: 2026-08-08