Canonical: https://instain.ru/en/ai/retell-ai/ Language: en Retell AI Platform # Retell AI. Voice agents with a call to a person 4.38 / 5 [Directory score](https://instain.ru/en/ai/retell-ai/#editorial-rating) [Official website ](https://www.retellai.com/) A platform for phone agents with a knowledge base, call translation and analysis. ![Retell AI documentation on setting up and verifying voice agents.](https://instain.ru/assets/images/retell-ai-screen-1e27d66ef647-1200.webp) Retell AI documentation on setting up and verifying voice agents. [Open the source ](https://docs.retellai.com/general/introduction) ## Limit the task of a telephone agent Retell AI is setting up a voice agent for calls. You can prepare a reference, set a script and pass the conversation to an employee. Connecting external actions requires its own customization. For a small team, a good first task looks simple: tell when the workshop opens, explain how to find an entrance, and pass the call to the person in case of a controversial issue. The official documentation describes the API to create a call. Before connecting real telephony, it is useful to pass training calls with a test number. ## Check the conversation with an unexpected clarification Call a fictional workshop. First ask for hours of work, then interrupt the answer with a question about the address. Finally, ask for an action that is not in the certificate. In the analysis of the call, note whether the agent retained the meaning of the clarification and did not promise to perform an inaccessible operation. Check the call transmission separately. Prepare a case when an employee is available and a case when there is no one to answer. This will show whether the subscriber has a clear continuation of the conversation in case of failure. Check if the reason for the transfer is preserved in the journal. ## How to estimate the cost The developer publishes the payment for use and start credits. The amount depends on the selected components and call parameters, so see the conditions for your number, voice model and route. The pilot is better to start with a small sample. On real calls, they determine in advance how to report the record, what data to transfer and to whom access to the journal is allowed. ## Suitable tasks - Set up a trial phone agent - Check the translation of the call to the employee - Analyze the outcome of the test conversation Features ## Strengths - Knowledge base and call transfer - Official API for phone calls Things to consider ## Limitations - Telephony and external actions require customization - Cost depends on components and duration ## Selection and conditions Free access Not confirmed Trial period Not confirmed No sign-up required Not confirmed Russian interface Not confirmed Local installation Not confirmed API Yes “Not confirmed” means there is not enough information. The feature may still be available; check the developer’s terms. Input formats Text, Audio Result Audio, Text ### Terms Starting credits are limited. For a phone call, you need to configure the number and route. From task to first result ## Practical example Task Set up a trial phone agent What to prepare Training number and agreed certificate of a fictional workshop. ### Task brief or prompt Set up an agent to respond about work hours and address. In the test call, interrupt the answer with a question about the address, then ask to transfer the call to an employee. ### Expected result Test conversation with a verifiable answer and transition to an employee. ### How to check the result - Check the opening hours and address with a certificate. - Repeat the translation when the employee is unavailable. An editorial teaching example of a task brief, not the result of hands-on testing of the service. Check that the required mode is available, that you have rights to the source material and that the intended use of the result is permitted. Check details ## Official sources - [Retell AI platform and scripts ](https://www.retellai.com/) - [Retell AI Costs and Plans ](https://www.retellai.com/pricing) - [Call Creation API ](https://docs.retellai.com/api-references/create-phone-call) This description is based on the developer’s material. Features, prices and availability may change; check the primary source before use. About the tool Developer Retell AI Category [Work and study](https://instain.ru/en/category/productivity/) Access Cloud-based workbar and telephony setup. There is an API for integrations. Payment Start-up loans and payment for use. Separate corporate conditions. API Yes, from the developer [Developer terms ](https://www.retellai.com/pricing) Directory score 4.38 / 5 Features 4.50 / 5 Workflows 4.20 / 5 Ecosystem 4.30 / 5 Documentation 4.50 / 5 Scores are an editorial guide to the directory. They are not user reviews or the results of personal testing. 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