Writing & AI tools / AI chatbot15 tools
Best AI chatbots
Chat with an AI assistant for answers and drafts. Facts come from each tool's own pages, and every score says where it comes from. How we rank
- Tools
- 15
- Researched
- 4
- Free option
- 3
- Only listed
- 11
Disclosure: agathox makes some of the tools listed here. They are labelled and scored by the same method as every other tool.
Ranked by signals we can measure or quote: website health, the facts each tool's own pages state, and community discussion. Nothing here has been hands-on tested yet, so this is not a quality test. How the signals rank works
Quick answer
- No signup needed: ChatPDF
Based on what each tool's own pages say. A tool is left out when its pages say it varies or do not say. Details are listed under each tool.
Want two of these head to head? Compare tools side by side.
Details and sources
- Free tier
- Not stated.
- Paid plan
- More capabilities are available through paid plans. The page says: “Copilot AI helps you research, create, and get answers, with some capabilities subject to usage limits and more available through paid plans.”
- Signup
- Not stated.
- Watermark
- Not stated.
- Where files go
- Not stated.
From the tool's own pages, checked 2026-11-08. Sources: Home. Prices and limits change; check the tool before you rely on them.
Read automatically by a program, not by a person. Each fact quotes the sentence it came from, and a fact is shown only if that sentence is on the page. Where a page did not say, it reads “Not stated.”
Details and sources
- Free tier
- Free plan at $0/month: 1 user and 60 pages per month. No chat support or OCR. Page says no credit card required.
- Paid plan
- In USD, monthly billing: Expert $9.99/month (up to 3 users, 500 pages/month, then $0.02/page); Team $49/user/month (up to 10 users, 5,000 pages/month, then $0.01/page). Enterprise: custom pricing.
- Signup
- Not stated. Every plan links to sign-up.
- Watermark
- Not stated.
- Where files go
- Privacy policy says data is encrypted at rest and in transit and users can delete their data at any time. It does not say where files are stored or for how long.
From the tool's own pages, checked 2026-11-01. Sources: Pricing, Privacy policy. Prices and limits change; check the tool before you rely on them.
Details and sources
- Free tier
- The free plan allows for the analysis of 2 documents per day. The page says: “We offer a free plan that lets you analyze 2 documents every day.”
- Paid plan
- The ChatPDF Plus plan offers unlimited document analysis and advanced features. The page says: “For power users, our ChatPDF Plus plan provides unlimited document analysis, and more advanced features.”
- Signup
- Not stated.
- Watermark
- Not stated.
- Where files go
- Documents are stored with a SOC2 Type II certified storage provider and are encrypted during transfer and storage. The page says: “Your documents are protected by SSL encryption during transfer and remain encrypted while stored. Our SOC2 Type II certified storage provider ensures enterprise-level security.”
From the tool's own pages, checked 2026-11-04. Sources: Home. Prices and limits change; check the tool before you rely on them.
Read automatically by a program, not by a person. Each fact quotes the sentence it came from, and a fact is shown only if that sentence is on the page. Where a page did not say, it reads “Not stated.”
Details and sources
- Free tier
- The free tier is available for everyone at $0 and includes chat on web, desktop, and mobile, the ability to search the web, create files, run code, memory across conversations, and connect apps and tools. The page says: “Free Try Claude $0 Free for everyone Try Claude Chat on web, desktop, and mobile Search the web, create files, and run code Memory across conversations Connect your apps and tools.”
- Paid plan
- Not stated.
- Signup
- Users can continue with Google, Apple, email, or SSO to access Claude. The page says: “Continue with Google Continue with Apple OR Continue with email Continue with SSO.”
- Watermark
- Not stated.
- Where files go
- Not stated.
From the tool's own pages, checked 2026-11-04. Sources: Home. Prices and limits change; check the tool before you rely on them.
Read automatically by a program, not by a person. Each fact quotes the sentence it came from, and a fact is shown only if that sentence is on the page. Where a page did not say, it reads “Not stated.”
Answers come from each tool's own pages (“Unclear” means they do not say). Tick “Compare” on two to four tools to read them side by side.
Also listed (11, not yet tested)
Each of these answered when we visited its site. We have not tested them or recorded facts, so they are in alphabetical order, not ranked.
- Character.AIOpen
Character.AI is listed for: ai chatbot.
- ChatGPTOpen
Use ChatGPT to answer questions, write, create images, complete work, and code—all in one place. Get started for free or download the app.
- DeepSeekOpen
深度求索（DeepSeek），探索未至之境。专注于研究世界领先的通用人工智能底层模型与技术，开源 DeepSeek-V4、DeepSeek-R1 等前沿大模型。和 DeepSeek AI 对话，轻松接入 API。
- GrokOpen
Grok is an AI assistant built by SpaceXSI. Chat, create images, write code, and get real-time answers from the web and X.
- HuggingChatOpen
Making the community's best AI chat models available to everyone
- Le ChatOpen
Le Chat is listed for: ai chatbot.
- Meta AIOpen
Meta AI is listed for: ai chatbot.
- PerplexityOpen
Perplexity is a free AI-powered answer engine that provides accurate, trusted, and real-time answers to any question.
- PiOpen
Pi is listed for: ai chatbot.
- PoeOpen
Chat with the best AI, privately or in a group chat. Explore GPT-6-Astra, Claude-Opus-5.5, Claude-Fable-5.2, Gemini-4-Argon, Grok-4.7, and thousands of others, all on Poe.
- You.comOpen
The core AI infrastructure you need to maximize accuracy while reducing latency and costs.
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