Best AI Voice Agents for GPT-4

Find and compare the best AI Voice Agents for GPT-4 in 2025

Use the comparison tool below to compare the top AI Voice Agents for GPT-4 on the market. You can filter results by user reviews, pricing, features, platform, region, support options, integrations, and more.

  • 1
    Synthflow Reviews

    Synthflow

    Synthflow.ai

    €25 per month
    1 Rating
    No coding is required to create AI voice assistants that can make outbound calls and answer inbound calls. They can also schedule appointments 24 hours a day. Forget expensive machine learning teams and lengthy development cycles. Synthflow allows you to create sophisticated, tailored AI agents with no technical knowledge or coding. All you need is your data and your ideas. Over a dozen AI agents are available for use in a variety of applications, including document search, process automaton, and answering questions. You can use an agent as is or customize it according to your needs. Upload data instantly using PDFs, CSVs PPTs URLs and more. Every new piece of information makes your agent smarter. No limits on storage or computing resources. Pinecone allows you to store unlimited vector data. You can control and monitor how your agent learns. Connect your AI agent to any data source or services and give it superpowers.
  • 2
    OneAI Reviews

    OneAI

    OneAI

    $0.2 per 1,000 words
    Choose from our extensive library, adapt existing tools, or create your own features to effectively analyze and handle text, audio, and video content on a large scale. Seamlessly integrate sophisticated NLP functionalities into your applications or workflows. You can either utilize the resources available in the library or design personalized solutions. Effortlessly summarize, categorize, and examine language using modular and adaptable NLP components founded on cutting-edge models, all accessible through a single API request. Develop and refine tailored Language Skills with your own data utilizing our robust Custom-Skill engine. Considering that only 5% of the global population has English as their first language, it’s notable that most of One AI’s offerings support multiple languages. This means that whether you are creating a podcast platform, customer relationship management system, content publishing application, or any other type of product, you will have access to features such as language detection, processing, transcription, analytics, and comprehension capabilities, ensuring a versatile user experience across various languages. This flexibility empowers developers to cater to a wider audience and enhance user engagement.
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