Compare the Top AI Agents in the USA as of December 2025

What are AI Agents in the USA?

AI agents are autonomous systems designed to perform specific tasks by simulating intelligent behavior. They can perceive their environment, make decisions, and take actions to achieve particular goals based on their programming or learning. These agents can be rule-based, relying on pre-set instructions, or machine learning-based, adapting their behavior over time through experience. AI agents are used in various applications, from virtual assistants to self-driving cars and even decision-making systems in business. Their capabilities range from simple automation to complex problem-solving and predictive tasks. Compare and read user reviews of the best AI Agents in the USA currently available using the table below. This list is updated regularly.

  • 1
    Vertex AI
    AI Agents within Vertex AI are designed to automate tasks by leveraging machine learning models that can handle complex decisions and interactions. These agents can be trained to process natural language, understand context, and take autonomous actions based on data. By automating critical business processes, companies can enhance productivity and improve customer satisfaction. New customers receive $300 in free credits, enabling them to experiment with creating their own AI agents and test their performance on real-world tasks. With Vertex AI’s powerful infrastructure, businesses can deploy these agents across various domains, from customer service to operations, all while maintaining flexibility and scalability.
    Starting Price: Free ($300 in free credits)
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  • 2
    LM-Kit.NET
    The AI agents feature in LM-Kit.NET lets developers create, customize, and deploy agents for text generation, translation, code analysis, and other tasks without major code changes; a lightweight runtime and API layer coordinates multiple agents so they can share context, divide work, and run concurrently, while optional on-device inference cuts latency and keeps data local, and broad hardware support lets the same agents run on laptops, edge devices, or cloud GPUs to balance performance, cost, and security.
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    Starting Price: Free (Community) or $1000/year
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  • 3
    Mistral AI

    Mistral AI

    Mistral AI

    Mistral AI is a pioneering artificial intelligence startup specializing in open-source generative AI. The company offers a range of customizable, enterprise-grade AI solutions deployable across various platforms, including on-premises, cloud, edge, and devices. Flagship products include "Le Chat," a multilingual AI assistant designed to enhance productivity in both personal and professional contexts, and "La Plateforme," a developer platform that enables the creation and deployment of AI-powered applications. Committed to transparency and innovation, Mistral AI positions itself as a leading independent AI lab, contributing significantly to open-source AI and policy development.
    Starting Price: Free
  • 4
    Athina AI

    Athina AI

    Athina AI

    Athina is a collaborative AI development platform that enables teams to build, test, and monitor AI applications efficiently. It offers features such as prompt management, evaluation tools, dataset handling, and observability, all designed to streamline the development of reliable AI systems. Athina supports integration with various models and services, including custom models, and ensures data privacy through fine-grained access controls and self-hosted deployment options. The platform is SOC-2 Type 2 compliant, providing a secure environment for AI development. Athina's user-friendly interface allows both technical and non-technical team members to collaborate effectively, accelerating the deployment of AI features.
    Starting Price: Free
  • 5
    Inferable

    Inferable

    Inferable

    Create your first AI automation in 60 seconds. Inferable seamlessly integrates with your existing codebase and infrastructure, allowing you to create powerful AI automation without compromising on control or security. Works with your existing codebase. Integrates with your existing services via opt-in. Enforce determinism through source code. Create and manage automation programmatically. You own the computer, in your own infrastructure. Inferable comes out of the box with delightful DX to kickstart your AI automation journey. We bring the best in class vertically integrated LLM orchestration. You bring your product and domain expertise. At the core of Inferable is a distributed message queue that ensures your AI automation is scalable and reliable. It makes sure your automations are executed correctly, and that failures are handled gracefully. Decorate your existing functions, REST APIs, and GraphQL endpoints with decorators to require human approval.
    Starting Price: $0.006 per KB
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