Retell AI

Retell AI is a voice agent platform that lets businesses build AI agents to answer and place phone calls, from receptionists to appointment setters. It sits between a raw developer API and a finished product: there are templates and built-in phone actions for non-specialists, plus an API and webhooks for engineers. Its pricing is strictly pay as you go, which makes it easy to try before any sales conversation.

What is Retell AI used for?

Retell is used where phone volume is high and many calls follow a predictable script. Agents can act during the call, not only talk.

• AI receptionists and answering services that pick up every call
• Appointment setting that checks availability and books in real time
• Lead qualification and outbound campaigns through batch calling
• Customer service agents grounded in a company knowledge base
• Warm transfers to a human when the caller needs one
• Navigating keypad menus when the agent itself calls another business

Who Retell AI is best for

Retell suits healthcare practices, insurers, logistics firms, retailers, debt collectors and agencies that build agents for clients, especially through GoHighLevel or n8n. Developers who want a quicker path than assembling every piece themselves will like it too. Companies that need fully on-premises deployment or one fixed price for the whole stack should compare other options.

Retell AI pricing

As of October 2026, Retell's pay-as-you-go plan starts at $0 with $10 in free credits, and AI voice agents cost between $0.07 and $0.31 per minute depending on the language model, voice, telephony and add-ons you select. The plan includes full platform access, templates, call analytics, simulation testing, API access and 20 concurrent calls. Chat agents start at $0.002 per message. Add-ons such as advanced denoising, PII removal, safety guardrails and AI quality assurance raise the per-minute rate. The Enterprise plan has custom volume pricing and adds custom MSA and DPA terms, role-based access, SSO, a dedicated server option, higher concurrency and around-the-clock support.

Limitations to keep in mind

• The quoted range is wide, so model and voice choices strongly affect your bill
• Agents still need careful prompts and testing to avoid off-script answers
• Some enterprise controls, like SSO and dedicated infrastructure, are not on self-serve plans
• Outbound calling must follow local consent and telemarketing rules, which you are responsible for

Retell AI vs alternatives

ElevenLabs runs its own agents platform, which is attractive if voice quality is the top priority and you want one vendor. Deepgram offers a voice agent API that appeals to teams that prefer to build more themselves. echowin and VeraDial are more packaged answering services aimed at small businesses that want a receptionist without configuration. DialNexa focuses on Indian languages and telephony. Retell is the better choice when you want ready phone actions, such as booking and IVR navigation, without giving up model choice or signing an annual contract.

Tips for getting started with Retell AI

Start from a template close to your use case and edit the prompt rather than writing one from scratch. Connect your real calendar early, since booking is where most errors show up. Use the cost estimator on the pricing page with your preferred model and voice, and run simulation tests on edge cases before turning on batch outbound calls.

Retell AI FAQ

Is Retell AI free?

Retell AI is not free, but new accounts get $10 in free credits. After that, voice agents cost $0.07 to $0.31 per minute on the pay-as-you-go plan.

What is Retell AI used for?

Retell AI is used to build AI phone agents that answer calls, book appointments, qualify leads, transfer callers to humans and run outbound campaigns.

Does Retell AI integrate with my CRM?

Retell lists integrations with HubSpot, GoHighLevel, Make, n8n, Twilio and Vonage, and offers webhooks and an API for other systems.

What is the best alternative to Retell AI?

ElevenLabs is a strong alternative for voice quality, while echowin and VeraDial are simpler options for small businesses that want an AI receptionist.