Compare the Top Chatbot Software as of December 2025

What is Chatbot Software?

Chatbot software is a type of software that simulates conversation with a human user through text or voice input. Chatbot builders are companies and individuals who create chatbot software, often using specific programming languages like JavaScript. Chatbot programs can be used to assist customers in areas such as customer service, product recommendation, order processing and more. They can also serve as virtual assistants to help people complete tasks quickly and conveniently. Compare and read user reviews of the best Chatbot software currently available using the table below. This list is updated regularly.

  • 1
    LM-Kit.NET
    On-device chatbot library for .NET adds multi-turn conversational AI that preserves context with low latency and full privacy. Lightweight models remove cloud dependency. Tune replies with RandomSampling or MirostatSampling and regulate tokens through LogitBias and RepetitionPenalty for varied, non-repetitive output. Event-driven hooks let you insert custom logic before or after each message and enable human-in-the-loop review when needed.
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    Starting Price: Free (Community) or $1000/year
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  • 2
    Dialogflow
    Dialogflow from Google Cloud is a natural language understanding platform that makes it easy to design and integrate a conversational user interface into your mobile app, web application, device, bot, interactive voice response system, and so on. Using Dialogflow, you can provide new and engaging ways for users to interact with your product. Dialogflow can analyze multiple types of input from your customers, including text or audio inputs (like from a phone or voice recording). It can also respond to your customers in a couple of ways, either through text or with synthetic speech. Dialogflow CX and ES provide virtual agent services for chatbots and contact centers. If you have a contact center that employs human agents, you can use Agent Assist to help your human agents. Agent Assist provides real-time suggestions for human agents while they are in conversations with end-user customers.
  • 3
    OpenAI

    OpenAI

    OpenAI

    OpenAI’s mission is to ensure that artificial general intelligence (AGI)—by which we mean highly autonomous systems that outperform humans at most economically valuable work—benefits all of humanity. We will attempt to directly build safe and beneficial AGI, but will also consider our mission fulfilled if our work aids others to achieve this outcome. Apply our API to any language task — semantic search, summarization, sentiment analysis, content generation, translation, and more — with only a few examples or by specifying your task in English. One simple integration gives you access to our constantly-improving AI technology. Explore how you integrate with the API with these sample completions.
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