Retell AI
NewAI Voice Agents That Automate Phone Calls
#42 of 80 in AI Agents4,000 customers (per retellai.com)
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
- Retell AI ranks #42 of 80 in AI Agents with an AI visibility score of 2 (SlateIndex, Nov 3, 2026).
- Retell AI is most visible on ChatGPT (3.1) and least on Perplexity (0.9).
- AI engines name Retell AI in 2 of the 30 AI Agents buyer prompts SlateIndex tracks.
- g2.com is the source AI engines cite most in answers about Retell AI, with 5 citations.
About
Company details for Retell AI
Retell AI provides a platform for building, testing, deploying and monitoring AI voice agents that answer, qualify and book calls on phone lines. Teams design call flows on a drag-and-drop canvas, run QA on up to 100% of calls, and build custom analytics from post-call metrics. Agents can be deployed for inbound calls, outbound campaigns, web and SMS, and can hand calls to human agents. It ranks #42 of 80 in AI Agents on SlateIndex and has a visibility score of 2 in the latest weekly run.
Founded in 2023 and headquartered in Redwood City, California, the company employs 51–200 people. It has raised about $5M. Its differentiator: a no-code studio that lets the customer's own team build, update, test and deploy voice agents without relying on the vendor for every change.
- Website
- retellai.com
- Categories
- AI Agents
- Company size
- 51–200 employees
- Headquarters
- Redwood City, California
- Founded
- 2023
- Company type
- Private, venture-backed
- Funding
- Seed · $5M raised
- Customers
- 4,000 · per retellai.com/customers
- Pricing
- Contact sales · usage-based
- Free trial
- Free plan available
- Deployment
- Cloud platform, with enterprise on-premises deployment available
- Platforms
- Phone calls, Web widget, SMS, In-app chat, API and SDKs
- Compliance
- HIPAA, SOC 2 Type II, GDPR, ISO 27001
- Support
- Community and email support, 24/7 omnichannel support with dedicated portal (Enterprise), Dedicated implementation support (Enterprise), Named account manager (Enterprise)
Read from linkedin.com, retellai.com, g2.com, finance.yahoo.com, startzero.money, sacra.com · refreshed Nov 3, 2026.
AI visibility
Latest weekly run · Nov 3 · next run Nov 9
Visibility score trend
Weekly runs over the last 60 days, with up to 7 competitors. Click a name to hide or show its line.
Changes appear after the second weekly run in AI Agents. Microsoft Copilot Studio leads the category at 33.3%.
Media
Website and product screenshots for Retell AI
AI mentions & citations
Recent answers that name Retell AI
Which AI agent platform has the best reviews?
Based on the latest available customer-review data (November 2026), Salesforce Agentforce is the strongest overall contender, while Retell AI has one of the highest customer star ratings.
Which AI agent platform has the best reviews?
Retell AI (4.8 / 5 stars): Highly rated by developers and SMBs specializing in voice and conversational agent deployment.[](https://www.g2.com/categories/agentic-ai)
What are the best AI Agents tools in 2026?
Products & features
What Retell AI sells
Retell AI voice agents
AI voice agents that answer, qualify, book and follow up on real phone calls, with routing, transfers, IVR navigation and CRM write-back.
Retell Assure
Automated QA product for voice AI calls, launched November 2025 and available from January 2026.
Retell chat agents
AI-powered conversations across web and in-app chat.
Strengths engines cite
- Highly rated by developers and SMBs
- One of the highest customer star ratings
Target market & buyers
Businesses running phone-based customer operations, from self-serve teams to enterprises.
Notable customers include PWC, Twilio, capsule.com, Everise, Clear, Medical Data Systems, SWTCH, Pine Park Health.
| Industry | Primary use case |
|---|---|
| Healthcare | Appointment scheduling and filling unused provider capacity |
| Debt collection | Collecting payments by phone at scale |
| Insurance | Automating support and claims calls |
| Energy and services | Always-on voice support for EV drivers |
| Transit and transportation | AI voice on the front line of public transit calls |
| Software training | Admissions calls and candidate assessments |
| Consumer electronics | Global customer support |
Funding & recent developments
Funding
| Round | Year | Amount |
|---|---|---|
| Y Combinator | 2024 | $1M |
| Seed | 2024 | $5M |
| Latest known round | Total raised |
|---|---|
| Seed | $5M |
Recent developments
- Jun 2026CompanyRanked No. 1 on Best Places to Work in the Bay Area
The San Francisco Business Times ranked Retell No. 1 on its 2026 list.
- Jan 2026ProductUpgrades for corporate call centers
Retell announced upgrades across voice, chat, email and SMS for corporate call centers.
- Dec 2025CompanyRanked #4 fastest-growing software vendor of 2025
Brex's year-end benchmark ranked Retell #4, with 400% year-over-year growth.
- Nov 2025ProductRetell launches Retell Assure
Automated QA product for voice AI calls, available from January 1, 2026.
Competitive landscape
How Retell AI compares with its top three alternatives
Retell AI most often appears alongside Salesforce, Microsoft Copilot Studio, Claude in AI answers.
| Brand | Visibility | Share of voice | vs last week | Starting price |
|---|---|---|---|---|
| Retell AI | 2% | 0.5% | New | Free plan |
| Salesforce | 46.2% | 9.6% | New | Pricing not available |
| Microsoft Copilot Studio | 33.3% | 5.9% | New | Pricing not available |
| Claude | 47.5% | 11% | New | Pricing not available |
| OpenAI Agents SDK | 31.4% | 5.8% | New | Pricing not available |
Pricing
Usage-based pricing with a free plan
Cite as: SlateIndex, “Retell AI AI visibility profile”, https://slateindex.ai/brand/retell-ai, data of Nov 3, 2026. Licence: CC BY 4.0.