ChatGPT
Chatbots & agents8.7OpenAI's general-purpose assistant for writing, analysis, images and code
- Price
- $20/mo
- Free plan
- Yes
- API
- Yes
AI chatbots and agents are the general-purpose front door to large language models: you type a request and get an answer, a draft, an analysis or an action. General assistants such as ChatGPT cover writing, research, images and code in one place.
Answer engines such as Perplexity focus on sourced answers from the live web. Workspace assistants such as Notion AI live inside the tools your team already uses and answer from your own documents.
Most offer a free plan; paid tiers at $20 per month add the strongest models, longer memory and research modes, and $200 tiers remove usage limits for power users.
The right pick depends less on raw model quality than on where the assistant sits in your day.
OpenAI's general-purpose assistant for writing, analysis, images and code
Google's assistant across the Gemini app, Gmail, Docs and Android
Anthropic's assistant for writing, analysis and agentic coding
Ranked by editor score, then by listing completeness. Entry price is the cheapest paid plan.
| Tool | Best for | From | Free plan | Platforms | Score |
|---|---|---|---|---|---|
| 1 | Anyone who wants one assistant for writing, research, analysis and light coding | $20/mo | Yes | Web app, Windows, macOS +2 | 8.7 |
| 2 | Anyone already working in Gmail, Docs and Drive who wants one assistant across them | $4.99/mo | Yes | Web app, iOS, Android +1 | 8.6 |
| 3 | Writers, analysts and developers who need careful, instruction-following output | $20/mo | Yes | Web app, Windows, macOS +4 | 8.3 |
| 4 | Researchers, students and analysts who need verifiable answers quickly | $20/mo | Yes | Web app, iOS, Android +3 | 8.6 |
| 5 | Companies already standardized on Microsoft 365 that want AI inside Office | $18/mo | No | Web app, Windows, macOS +2 | 7.3 |
Every listing in this hub, 24 per page.
Answer engine that searches the web and cites every source
AI inside Word, Excel, PowerPoint, Outlook and Teams
4 checks, in the order that saves the most time.
The web: pick an answer engine with citations. Your documents and your team: a workspace assistant that searches your own pages. Everything: a general assistant is the safe default.
Message caps, file uploads and research runs differ a lot between vendors at the same headline price.
Look at how fast new models arrive, and pick a business plan when the content is confidential.
The apps differ more than the web versions do; if you work away from a desk, that is where the choice is made.
Entry price is the cheapest paid plan on monthly billing. Every listing shows the date its pricing page was checked.
See also Brainstorm ideas or browse every use case.
Short, factual answers on pricing, free plans and how AI chatbots and agents are ranked here.
Ask another questionA chatbot answers in a conversation. An agent takes a goal, breaks it into steps, uses tools such as browsing or code execution, and returns a result; most assistants now include agent modes such as deep research.
Perplexity, because every answer carries citations and its Deep Research mode compiles sourced reports. ChatGPT offers a comparable research mode on paid plans.
ChatGPT, Perplexity and most assistants have free plans with caps on advanced models and features. Paid plans start around $20 per month.
Yes. General assistants accept file uploads and projects; workspace assistants such as Notion AI answer directly from your wiki and connected apps.
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