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Review Top 9 best AI Chatbot ever – Is ChatGPT for free?

AI Chatbot is a computer program that uses artificial intelligence to simulate human-to-human conversation, capable of understanding and responding to user requests naturally and accurately. In this article, FPT.AI will present in-depth information about the core technologies, types of AI Chatbot, and their popular applications. The article also provides detailed reviews of the features and advantages of the top 9 AI chatbot online free that you can leverage to level up your performance.

What is an AI Chatbot?

AI Chatbot is a computer program designed to simulate human conversation, interacting with users through text or voice. AI Chatbot combine artificial intelligence, Machine Learning, and Natural Language Processing (NLP) to understand and analyze user requests, then apply Natural Language Generation (NLG) techniques to provide appropriate, accurate, and natural human-like responses.

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How AI Chatbot Works

In reality, you may have already interacted with chatbots through various activities, from smart speakers in your home, popular messaging applications like SMS, WhatsApp, and Facebook Messenger, to work platforms like Slack. These bots simulate natural conversation and try to resolve your queries before transferring to human representatives if necessary.

With the ability to automate conversations, AI Chatbot help organizations and businesses flexibly scale, personalize, and improve communication capabilities in many activities – from internal workflows and customer service to DevOps management.

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The best AI chatbots of 2025

Review of TOP 9 AI Chatbot online free

AI Chatbot Developer Service Plans Key Strengths Special Features Best For
FPT AI Chat FPT Smart Cloud (Vietnam) Business service package, contact for detailed consultation Superior Vietnamese language processing (>90% accuracy); Multi-platform integration Rating Agent; User Reaction; Typing Suggestion Vietnamese businesses seeking customer service automation
ChatGPT OpenAI Free to $200/month Globally popular; Continuously updated features DALL-E 3 (image generation); Deep Research; Advanced Voice Mode; Sora (AI video) Individuals and businesses needing comprehensive AI solutions
Claude Anthropic Free to $20/month Large context memory (150,000 words); Pleasant conversational style Artifacts (interactive data dashboards); Computer use (experimental) Long document analysis and natural conversations
Deepseek DeepSeek (China) Completely free (open source) Strong logical reasoning; Can run on personal computers DeepSeek R1 comparable to ChatGPT o3 Developers and small organizations needing free AI
Microsoft Copilot Microsoft Free to paid Deep integration with Microsoft Office Unlimited image generation; Personalized experience Microsoft Office users (Word, Excel, PowerPoint)
Gemini Google Free Integration with the entire Google ecosystem Direct Python code writing/execution; Gems (customizable like GPTs) Gmail, Google Drive and Google services users
Meta AI Meta Completely free Direct integration with Meta social networks Developed on LLaMA 3 model (70 billion parameters), can create animated images and videos Facebook, Instagram, Messenger and WhatsApp users
Perplexity Perplexity AI Free to $20/month Results displayed with source citations Purpose-specific searches; Conversation sharing Research and information searches requiring clear sources
Grok xAI (Elon Musk) Completely free Real-time updates; Humorous style DeepSearch; Brainstorm; Analyze Data; Create Images Users needing quick information updates and creativity

FPT.AI Chat

FPT.AI Chat is one of the leading AI chatbot platforms in Vietnam, developed by FPT Smart Cloud – a member of FPT Technology Group. This artificial intelligence solution is designed to help businesses automate customer care, optimize consultation processes, and increase business efficiency. Not only possessing superior Vietnamese natural language processing technology, FPT.AI Chat also stands out with its deep and flexible integration capabilities, suitable for many different industries.

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The difference between FPT AI Chat and ChatGPT

FPT.AI Chat uses Generative AI technology and Deep Learning, helping the chatbot correctly understand the intent and context of user questions. The accurate response rate can reach over 90%. This allows the chatbot to quickly and accurately handle common questions related to products, prices, promotions, or purchasing processes, thereby reducing repetitive work for consultants, helping them focus on situations requiring higher expertise.

Additionally, FPT.AI Chat has multi-platform integration capabilities, from websites and mobile applications to popular channels such as Facebook Messenger, Zalo, Viber, Instagram, WhatsApp, and even the business social network GapoWork. Businesses only need to build a chatbot once and can deploy it across multiple channels, effectively expanding customer reach.

Besides the main features, FPT.AI Chat is continuously updated with add-ons based on actual needs:

  • Rating Agent: Allows customers to rate their satisfaction with consultants or with the chatbot itself after each conversation session, helping businesses measure support quality and improve services.
  • User Reaction: Users can respond with emoji reactions to chatbot answers, creating a more natural and interesting conversation experience. These interactions are compiled to improve response quality.
  • Typing Suggestion: Suggests questions for users based on keywords being typed, saving time and directing the conversation more effectively.
  • Copy Model: Useful in the testing and deployment phases of chatbots, allowing the copying of model structures from a test bot to an official bot, ensuring consistency and accuracy when put into actual operation.

Since July 2024, LPBank has officially deployed FPT.AI Chat on their website, Zalo OA, and fanpages to automate 24/7 customer care processes. This banking chatbot can handle a range of common issues such as account registration, product information, interest rate consultation… and is ready to connect with consultants when customers need in-depth support. This brings a seamless, modern experience that aligns with the trend of digitizing banking services.

According to representatives from FPT Smart Cloud and LPBank, the FPT.AI chatbot is not just a support tool but an intelligent interaction bridge, helping the bank maintain engagement with customers across multiple channels. This is a powerful “made in Vietnam” AI chatbot solution, suitable for Vietnamese businesses looking to effectively digitally transform, enhance customer care quality, and optimize operations with advanced AI technology.

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LPBank has deployed FPT AI Chat to improve customer service

ChatGPT

ChatGPT, developed by OpenAI, has become a global phenomenon and is currently the most popular free AI chat software. This AI Chatbot uses Deep Learning technology to generate natural, intelligent, and contextually accurate responses.

Users can ask questions and communicate via text, request tasks such as writing paragraphs, writing programming code, and composing emails as if conversing with a real person. ChatGPT also supports many different languages, including Vietnamese, ensuring it meets the learning and working needs of Vietnamese users.

ChatGPT provides many outstanding features such as:

  • Content management
  • Programming support
  • Processing and analyzing big data to provide detailed reports
  • Predicting business trends and supporting strategic decision-making
  • Creating images from text through DALL-E 3
  • Analyzing and summarizing data
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Factors that make up ChatGPT’s superior language processing capabilities

With the latest version, OpenAI has added many creative features such as:

  • Search tool to find information on the web and cite sources
  • Deep Research acts as an assistant that reads and analyzes all search results to create in-depth reports
  • Projects allows uploading documents and setting up system guidelines to direct how ChatGPT responds
  • Canvas is a new output mode that helps users write together with ChatGPT
  • Advanced Voice Mode allows real-time voice interaction
  • Operator AI Agent can perform tasks by browsing the web
  • Sora, OpenAI’s AI video model (currently only available to Pro users in the United States)

Regarding service packages, ChatGPT offers several options:

  • ChatGPT 3.5: Free, but with limited uses per day
  • ChatGPT Plus: $20/month, unlocks many advanced features and unlimited use
  • ChatGPT Pro: $200/month
  • ChatGPT Team: $20-30/user/month, designed for small teams
  • ChatGPT Enterprise: Variable pricing depending on needs

To use ChatGPT, users only need to access the website https://chatgpt.com/ and log in with an existing account or register a new one. When starting a conversation, you just need to enter content in the box at the bottom of the screen. When results are displayed, a new item will be created in the left menu, helping you easily manage and interact with previous conversations.