Compare the Top Chatbot Software in Japan as of September 2025

What is Chatbot Software in Japan?

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 in Japan 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
    ChatGPT

    ChatGPT

    OpenAI

    ChatGPT is an AI-powered conversational assistant developed by OpenAI that helps users with writing, learning, brainstorming, coding, and more. It is free to use with easy access via web and apps on multiple devices. Users can interact through typing or voice to get answers, generate creative content, summarize information, and automate tasks. The platform supports various use cases, from casual questions to complex research and coding help. ChatGPT offers multiple subscription plans, including Free, Plus, and Pro, with increasing access to advanced AI models and features. It is designed to boost productivity and creativity for individuals, students, professionals, and developers alike.
    Starting Price: Free
  • 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.
  • 4
    Claude

    Claude

    Anthropic

    Claude is an artificial intelligence large language model that can process and generate human-like text. Anthropic is an AI safety and research company that’s working to build reliable, interpretable, and steerable AI systems. Large, general systems of today can have significant benefits, but can also be unpredictable, unreliable, and opaque: our goal is to make progress on these issues. For now, we’re primarily focused on research towards these goals; down the road, we foresee many opportunities for our work to create value commercially and for public benefit.
    Starting Price: Free
  • 5
    ChatGPT Plus
    We’ve trained a model called ChatGPT which interacts in a conversational way. The dialogue format makes it possible for ChatGPT to answer followup questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests. ChatGPT is a sibling model to InstructGPT, which is trained to follow an instruction in a prompt and provide a detailed response. ChatGPT Plus is a subscription plan for ChatGPT a conversational AI. ChatGPT Plus costs $20/month, and subscribers will receive a number of benefits: - General access to ChatGPT, even during peak times - Faster response times - GPT-4 access - ChatGPT plugins - Web-browsing with ChatGPT - Priority access to new features and improvements ChatGPT Plus is available to customers in the United States, and we will begin the process of inviting people from our waitlist over the coming weeks. We plan to expand access and support to additional countries and regions soon.
    Starting Price: $20 per month
  • 6
    Doubao

    Doubao

    ByteDance

    Doubao is an intelligent language model developed by ByteDance. It has been providing useful answers and insights to users across a wide range of topics. Doubao can handle complex questions, offer detailed explanations, and engage in meaningful conversations. With its advanced language understanding and generation capabilities, it continues to assist people in seeking knowledge, solving problems, and exploring new ideas. Whether for academic inquiries, creative inspiration, or simply having a conversation, Doubao is a valuable tool for users looking for accurate and helpful information.
    Starting Price: Free
  • 7
    ChatGPT Pro
    As AI becomes more advanced, it will solve increasingly complex and critical problems. It also takes significantly more compute to power these capabilities. ChatGPT Pro is a $200 monthly plan that enables scaled access to the best of OpenAI’s models and tools. This plan includes unlimited access to our smartest model, OpenAI o1, as well as to o1-mini, GPT-4o, and Advanced Voice. It also includes o1 pro mode, a version of o1 that uses more compute to think harder and provide even better answers to the hardest problems. In the future, we expect to add more powerful, compute-intensive productivity features to this plan. ChatGPT Pro provides access to a version of our most intelligent model that thinks longer for the most reliable responses. In evaluations from external expert testers, o1 pro mode produces more reliably accurate and comprehensive responses, especially in areas like data science, programming, and case law analysis.
    Starting Price: $200/month
  • 8
    Claude Pro

    Claude Pro

    Anthropic

    Claude Pro is an advanced large language model designed to handle complex tasks while maintaining a friendly, accessible demeanor. Trained on extensive, high-quality data, it excels at understanding context, interpreting subtle nuances, and producing well-structured, coherent responses across a wide range of topics. By leveraging robust reasoning capabilities and a refined knowledge base, Claude Pro can draft detailed reports, compose creative content, summarize lengthy documents, and even assist in coding tasks. Its adaptive algorithms continuously improve its ability to learn from feedback, ensuring that its output remains accurate, reliable, and helpful. Whether serving professionals seeking expert support or individuals looking for quick, informative answers, Claude Pro delivers a versatile and productive conversational experience.
    Starting Price: $18/month
  • 9
    GPT4All

    GPT4All

    Nomic AI

    GPT4All is an ecosystem to train and deploy powerful and customized large language models that run locally on consumer-grade CPUs. The goal is simple - be the best instruction-tuned assistant-style language model that any person or enterprise can freely use, distribute and build on. A GPT4All model is a 3GB - 8GB file that you can download and plug into the GPT4All open-source ecosystem software. Nomic AI supports and maintains this software ecosystem to enforce quality and security alongside spearheading the effort to allow any person or enterprise to easily train and deploy their own on-edge large language models. Data is one the most important ingredients to successfully building a powerful, general-purpose large language model. The GPT4All community has built the GPT4All open source data lake as a staging ground for contributing instruction and assistant tuning data for future GPT4All model trains.
    Starting Price: Free
  • 10
    PygmalionAI

    PygmalionAI

    PygmalionAI

    PygmalionAI is a community dedicated to creating open-source projects based on EleutherAI's GPT-J 6B and Meta's LLaMA models. In simple terms, Pygmalion makes AI fine-tuned for chatting and roleplaying purposes. The current actively supported Pygmalion AI model is the 7B variant, based on Meta AI's LLaMA model. With only 18GB (or less) VRAM required, Pygmalion offers better chat capability than much larger language models with relatively minimal resources. Our curated dataset of high-quality roleplaying data ensures that your bot will be the optimal RP partner. Both the model weights and the code used to train it are completely open-source, and you can modify/re-distribute it for whatever purpose you want. Language models, including Pygmalion, generally run on GPUs since they need access to fast memory and massive processing power in order to output coherent text at an acceptable speed.
    Starting Price: Free
  • 11
    JinaChat

    JinaChat

    Jina AI

    Experience JinaChat, a pioneering LLM service tailored for pro users. JinaChat ushers in a new era of multimodal chat capabilities, extending beyond text to incorporate images and more. Delight in our offer of free short interactions under 100 tokens. Our API empowers developers to leverage long conversation histories and eliminate redundant prompts to build complex applications. Dive headfirst into the future of LLM services with JinaChat, where conversations are multimodal, long-memory, and affordable. Modern LLM applications often hinge on lengthy prompts or extensive memory, leading to high costs when similar prompts are repeatedly sent to the server with only minor changes. JinaChat's API solves this problem by letting you carry forward previous conversations without resending the entire prompt. This saves you both time and money, making it the perfect tool for developing complex applications like AutoGPT.
    Starting Price: $9.99 per month
  • 12
    Claude Max

    Claude Max

    Anthropic

    The Max Plan from Anthropic's Claude platform is designed for users who require extended access and higher usage limits for their AI-powered collaboration. Ideal for frequent and demanding tasks, the Max Plan offers up to 20 times higher usage than the standard Pro plan. With flexible usage levels, users can select the plan that fits their needs—whether they need additional usage for complex data, large documents, or extended conversations. The Max Plan also includes priority access to new features and models, ensuring users always have the latest tools at their disposal.
    Starting Price: $100/month
  • 13
    FreedomGPT

    FreedomGPT

    Age of AI

    FreedomGPT is a 100% uncensored and private AI chatbot launched by Age of AI, LLC. Our VC firm invests in startups that will define the age of Artificial Intelligence and we hold openness as core. We believe AI will dramatically improve the lives of everyone on this planet if it is deployed responsibly with individual freedom as paramount. It was created to showcase the inevitability and necessity of unbiased and censor free AI. Most importantly it is 100% private. If generative AI is going to be an extension of the human psyche it must not be involuntarily exposed to others. A central Age of AI investing thesis is that everyone and every organization will need their own private LLM. We strive to invest in companies that make this a reality across numerous industry verticals.
    Starting Price: Free
  • 14
    ChatGPT Enterprise
    Enterprise-grade security & privacy and the most powerful version of ChatGPT yet. 1. Customer prompts or data are not used for training models 2. Data encryption at rest (AES-256) and in transit (TLS 1.2+) 3. SOC 2 compliant 4. Dedicated admin console and easy bulk member management 5. SSO and Domain Verification 6. Analytics dashboard to understand usage 7. Unlimited, high-speed access to GPT-4 and Advanced Data Analysis* 8. 32k token context windows for 4X longer inputs and memory 9. Shareable chat templates for your company to collaborate
    Starting Price: $60/user/month
  • 15
    Sparrow

    Sparrow

    DeepMind

    Sparrow is a research model and proof of concept, designed with the goal of training dialogue agents to be more helpful, correct, and harmless. By learning these qualities in a general dialogue setting, Sparrow advances our understanding of how we can train agents to be safer and more useful – and ultimately, to help build safer and more useful artificial general intelligence (AGI). Sparrow is not yet available for public use. Training a conversational AI is an especially challenging problem because it’s difficult to pinpoint what makes a dialogue successful. To address this problem, we turn to a form of reinforcement learning (RL) based on people's feedback, using the study participants’ preference feedback to train a model of how useful an answer is. To get this data, we show our participants multiple model answers to the same question and ask them which answer they like the most.
  • 16
    ERNIE Bot
    ERNIE Bot is an AI-powered conversational assistant developed by Baidu, designed to facilitate seamless and natural interactions with users. Built on the ERNIE (Enhanced Representation through Knowledge Integration) model, ERNIE Bot excels at understanding complex queries and generating human-like responses across various domains. Its capabilities include processing text, generating images, and engaging in multimodal communication, making it suitable for a wide range of applications such as customer support, virtual assistants, and enterprise automation. With its advanced contextual understanding, ERNIE Bot offers an intuitive and efficient solution for businesses seeking to enhance their digital interactions and automate workflows.
    Starting Price: Free
  • 17
    YandexGPT
    Take advantage of the capabilities of generative language models to improve and optimize your applications and web services. Get an aggregated result of accumulated textual data whether it be information from work chats, user reviews, or other types of data. YandexGPT will help both summarize and interpret the information. Speed up text creation as you improve their quality and style. Create template texts for newsletters, product descriptions for online stores and other applications. Develop a chatbot for your support service: teach the bot to answer various user questions, both common and more complicated. Use the API to integrate the service with your applications and automate processes.
  • 18
    PanGu Chat
    PanGu Chat is an AI chatbot developed by Huawei. PanGu Chat can converse like a human and answer any questions like ChatGPT does.
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