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AI Chatbots & Assistants, Answer, Automate & Support

AI chatbots hold natural conversations to answer questions, automate customer support, and act as everyday assistants for work and research.

131 toolsFilter by price, platform & featureEvery tool verified live before listing
Reviewed by Challenging Voice Editorial · Updated weekly How we rate

Our highest-rated Chatbots AI tools are ChatGPT, Claude, and Perplexity AI. ChatGPT is our top overall pick (4.8/5), and it includes a free plan. Compare these 8 below by price, features and rating to find the right fit.

★ Top pickChatGPTOur highest-rated pick, known for broad, frequently updated GPT model familyVisit ChatGPT
ToolBest forFreeFromRatingVisit
ChatGPTBest overallYes$20/mo4.8Visit
ClaudeBest free optionYes$17/mo4.7Visit
Perplexity AIBest valueYes$20/mo4.6Visit
DeepSeekAlso worth a lookYesFree4.5Visit
GrokAlso worth a lookYes$30/mo4.5Visit
Google GeminiAlso worth a lookYes$20/mo4.4Visit
Mistral Le ChatAlso worth a lookYes$14/mo4.4Visit
Character.AIMost popularYes$4.99/mo4.3Visit

Best Chatbots AI tool for each use case

Research & up-to-date answers

Get current, sourced answers rather than relying on stale training data. Perplexity is built for this, citing live web sources for every answer, while Gemini and ChatGPT also browse; look for inline citations you can verify before trusting.

Long documents & analysis

Summarize, compare, and reason over long reports, contracts, or codebases. Claude is known for large context windows and careful long-document handling; look for big file or context limits and strong reasoning when accuracy over long inputs matters.

Coding & technical help

Debug, explain, and generate code conversationally. ChatGPT and Claude both excel at programming, while Gemini integrates with Google's developer tools; look for strong reasoning, code execution, and the ability to handle your whole file or repo in context.

Everyday & emotional support

Chat casually, talk through ideas, or get a supportive sounding board. Pi is designed for warm, conversational support, while general assistants handle brainstorming and advice; choose based on whether you want a tool or a companion-style tone.

How to choose a Chatbots AI tool

What to evaluate
  • Web access and citations — because only some assistants give current, verifiable answers
  • Context window size — since long documents and codebases need a model that holds it all
  • Ecosystem integration — as Gemini ties into Google and ChatGPT into a broad plugin and app network
  • Reasoning vs. speed — because the strongest model is slower and pricier than lightweight alternatives
Which one should you pick?
If you need current, sourced factsUse Perplexity, which cites live web sources by default, making answers easy to verify and harder to hallucinate.
If you work with long documents or careful reasoningChoose Claude for its large context window and strong, measured handling of lengthy or nuanced inputs.
If you want one versatile all-rounderPick ChatGPT, whose broad capabilities, plugins, and ecosystem make it the safest general-purpose default.

Best free Chatbots AI tools

These Chatbots tools offer a genuine free plan or trial, a smart place to start before you pay.

How much do Chatbots AI tools cost?

Price tierWhat you getExamples
Free$0, free plan or open-sourceSimSimi, Cleverbot, Quickchat AI, Personality Forge, iChatWithGPT
BudgetUnder $15/moResolveAI, Shmooz AI, Chatmate AI, DocuChat
Mid-range$15 to $39/moLetsAsk.AI
Premium$40/mo and upBotnation AI

Pro tips

  • No single chatbot wins everything; keep two open and route queries to each one's strength.
  • Always verify cited sources and facts; even browsing chatbots misread pages and fabricate confident details.
  • Free tiers often run smaller or older models, so paid plans noticeably improve reasoning quality.
  • For sourced research use Perplexity; for long-document reasoning use Claude, rather than forcing one tool.

How we check & rank

We verify every tool in this category is live and write its listing from the vendor’s own material, then score it on value, feature depth and how well it fits the job. Rankings are never for sale, and affiliate links never change a score. Read our full methodology

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About Chatbots AI tools

This category spans two related things: general-purpose AI assistants like ChatGPT, Claude, and Gemini that help with writing, research, and analysis, and customer-facing chatbot platforms that businesses deploy to answer support questions, qualify leads, and guide users 24/7. They serve individuals seeking a smart assistant as well as companies that want to automate conversations on their website, app, or help desk, often trained on their own documents.

Pick based on whether you need a personal assistant or a deployable support bot, then compare on:

  • Model and reasoning quality, accuracy, context length, and how well it handles complex questions.
  • Knowledge grounding, ability to train on your data and cite sources to reduce hallucinations.
  • Integrations and channels, website, WhatsApp, Slack, and help-desk connections.
  • Privacy and cost, data handling, usage limits, and per-seat or per-message pricing.

Chatbots AI tools — FAQ

What is an AI chatbot?
An AI chatbot is software that understands and responds in natural language using a large language model. It can answer questions, hold conversations, and automate tasks like customer support, examples include ChatGPT, Claude, and Intercom's Fin.
What's the difference between an AI assistant and a customer-support chatbot?
General assistants like ChatGPT help individuals with broad tasks such as writing and research. Support chatbots are deployed by businesses, trained on company data, and focused on answering customer questions and resolving tickets.
Are AI chatbots free to use?
Many assistants offer capable free tiers, with paid plans (around $20 per month) unlocking better models and higher limits. Business chatbot platforms are usually subscription-based, priced per seat, resolution, or message volume.
Can AI chatbots replace human customer support?
They can resolve a large share of routine, repetitive questions instantly and around the clock, reducing workload. Complex, sensitive, or high-stakes issues still need human agents, so most teams use a hybrid approach.
What's the best free AI chatbot?
ChatGPT's free tier is the best all-around free chatbot, offering capable general-purpose help with some access to current models. Claude and Gemini also have strong free tiers, and Perplexity is the best free option for sourced research. The right pick depends on whether you prioritize versatility, reasoning, or citations.
How much do AI chatbots cost?
The major chatbots all offer free tiers, with paid plans clustered around the low-twenties of dollars monthly for faster, smarter models and higher limits. ChatGPT, Claude, Gemini, and Perplexity price their premium tiers similarly. Pay only if you hit free-tier limits or need the most capable models for serious work.
Is ChatGPT Plus worth it?
ChatGPT Plus is worth it for heavy users who want the latest models, higher limits, and features like advanced data analysis and image generation. Light users are well served by the free tier or by free Claude and Gemini. If you use it daily for work, the upgrade pays off quickly.
ChatGPT vs. Claude vs. Gemini: which is best?
It depends on the task: Claude excels at long documents and careful reasoning, ChatGPT is the most versatile all-rounder with the broadest ecosystem, and Gemini integrates best with Google's apps and real-time data. For sourced research, Perplexity beats all three. Most power users keep two open and switch based on the job.

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