Best Free AI Chatbots in 2026
Every major AI chatbot has a free tier, and every one of them costs $20 a month to escape. That price has held remarkably steady across six competitors who otherwise agree on nothing, which tells you the number was chosen by the market rather than by any of them.
So the interesting question is not what the paid plans cost. It is what the free tiers withhold, because they withhold different things, and for a lot of people the free version of the right tool beats the paid version of the wrong one.
Here is what each free plan actually gives you, checked August 2026.
Quick comparison
| Chatbot | Free tier | Paid entry | Rating | Reviews |
|---|---|---|---|---|
| ChatGPT | Yes | $20/mo (Plus), $200 (Pro) | 4.5 | 3,347 |
| Claude | Yes | $20/mo (Pro), $17 annual | 4.5 | 30 |
| Gemini | Yes | $19.99/mo (AI Pro) | not rated | - |
| Perplexity | Yes | $20/mo (Pro) | 4.3 | 361 |
| Microsoft Copilot | Yes | Via Microsoft 365 Premium, $19.99/mo | 4.5 | 227 |
| Grok | Yes | $30/mo (SuperGrok) | 4.2 | 21 |
Ratings aggregated by Toolradar across G2, Capterra and other platforms. Read the review counts before the scores; the section below explains why.
Five of six cluster within a dollar of each other. Grok is the outlier at $30, and its top tier at $300 is the highest here by a distance.
Why the ratings in that table are almost useless
We publish aggregated ratings on every comparison we write, and this is the one category where we have to tell you not to lean on them.
Look at the counts rather than the scores. ChatGPT has 3,347 aggregated reviews. Claude has 30. Grok has 21. Those are not comparable measurements, and a 4.5 drawn from thirty reviews carries no more information than an anecdote from a colleague.
The reason is structural rather than a gap in our data. Business software directories like G2 and Capterra collect reviews from people who bought software for an organisation, went through procurement and can be verified as customers. AI chatbots are overwhelmingly bought by individuals on personal cards, and individuals do not write G2 reviews. The review infrastructure was built for a purchasing motion this category does not use.
So the honest position: ChatGPT's 4.5 across 3,347 reviews is a real signal, Perplexity's 4.3 across 361 is a weak one, and the rest are placeholders. Everywhere else in this series the ratings do real work. Here, judge on the free tiers, which you can test in an afternoon at no cost, and treat the scores as background.
That is worth knowing beyond this article, because plenty of comparisons rank these tools by exactly these numbers without mentioning that one of them rests on twenty-one people.
ChatGPT: the default, and the widest free surface
Aggregated rating 4.5 across 3,347 reviews (4.6 on G2, 4.4 on Capterra), the only robust sample here. ChatGPT's free tier gives access to a capable model with usage limits, plus a small daily allowance of image generation, roughly two to three a day. Plus is $20 a month and Pro is $200.
The free tier is the broadest here in terms of what you can touch: chat, some image generation, file uploads and voice. What you run out of is volume rather than capability, and the limits reset rather than locking you out.
Plus is worth it for one reason above the others: consistent access during peak times and to the newest models first. If you use it daily for work, the reliability alone justifies the price. If you use it twice a week, the free tier is genuinely enough.
The $200 Pro tier is aimed at people running long reasoning tasks continuously. Very few individuals need it.
Claude: the
Aggregated rating 4.5, but across only 30 reviews. Claude is free with usage limits, Pro is $20 a month or $17 billed annually, and Max starts at $100.
Claude's differentiator on the free tier is document handling. Paste a long contract, a research paper or a large chunk of code and the responses stay coherent in a way that is noticeably better than the alternatives at the same price of zero.
It is also the one people reach for when the writing itself matters. The default register is less breathless than its competitors, which sounds like taste and shows up as less editing.
Pro's annual price at $17 is the cheapest paid tier in this group, which is easy to miss because the monthly figure matches everyone else's.
Gemini: free, and already inside your documents
Gemini is free, with Google AI Pro at $19.99 a month and Ultra from $99.99.
The argument for Gemini is not the model in isolation, it is where it sits. If your work lives in Docs, Sheets, Gmail and Drive, having the assistant inside those rather than in a separate tab removes the copy-paste tax that quietly eats the benefit of every other chatbot.
The free tier is generous and the integration story is the reason to stay. The reason to leave is that its answers are the most cautious of the group, which is fine for drafting an email and frustrating for anything that needs a position.
Perplexity: the free tier that cites its sources
Perplexity is free, with Pro at $20 a month or $200 a year and Max at $200 a month.
Perplexity is a search engine wearing a chatbot's interface, and the free tier reflects that: every answer comes with sources you can open. For research, fact-checking or anything where you need to defend the claim afterwards, that is the whole product.
Pro buys more searches with stronger models and file analysis. For occasional research the free tier does the job, and the annual Pro price of $200 works out below $17 a month, matching Claude as the cheapest serious upgrade.
Use it when the answer needs a citation. Use something else when you want the model to think rather than to look things up.
Microsoft Copilot: free, and bundled if you already pay Microsoft
Aggregated rating 4.5 across 227 G2 reviews. Copilot has a free tier, with premium capabilities arriving through Microsoft 365 Premium at $19.99 a month.
The calculation here is different from the others. If your organisation already pays for Microsoft 365, the question is not whether to buy Copilot but whether you already have it. Check before subscribing to anything on this list, because a duplicate purchase is the most common waste in this category.
Inside Word, Excel, Outlook and Teams it is genuinely useful, particularly for summarising a meeting you missed or a thread that got out of hand. Outside those apps, the free consumer chatbot is competent rather than distinguished.
Grok: the expensive outlier
Aggregated rating 4.2 across 21 reviews, the thinnest sample in this comparison. Grok is free with limits, SuperGrok is $30 a month, and Heavy is $300.
At $30 it is the most expensive standard tier here by 50%, and the free tier is tied to an X account. Its distinguishing feature is real-time access to what is being said on X right now, which is either exactly what you need or entirely irrelevant, with very little in between.
For monitoring a live event or a breaking story it has a genuine edge. For general work at $30 against everyone else's $20, the burden of proof is on it.
What the free tiers actually cost you
They are not free in the way the word implies, and it is worth being clear about two things.
Your conversations may train the model. Free tiers are generally the ones where data is used for improvement, with the opt-out sitting in settings or in the paid plan. If you paste client work or anything under NDA into a free chatbot, check that setting first. This is the single most common compliance mistake with these tools.
Rate limits arrive at the worst time. The free allowance is consumed by whatever you did earlier in the day, so the wall tends to appear mid-task rather than at a natural break. That interruption is what most people are actually buying their way out of at $20.
How to choose
For long documents and careful writing, Claude, and its $17 annual Pro is the cheapest upgrade here.
For research you have to defend, Perplexity, because sources come attached by default.
If you live in Google Workspace, Gemini. If you live in Microsoft 365, check whether you already have Copilot before paying anyone.
For the broadest general-purpose free tier, ChatGPT, which remains the default for good reasons.
For live discussion on X, Grok, and only for that, given the price.
The honest answer for most people is to run two free tiers rather than buy one subscription. Claude for writing and Perplexity for research costs nothing and covers more ground than $20 spent on either.
Related: our guide to AI research assistants goes deeper on the citation question, and the Dupple reviews directory has individual write-ups with current pricing.
FAQ
Which AI chatbot has the best free tier?
It depends on the task. ChatGPT's is the broadest, covering chat, limited image generation, files and voice. Claude's is the strongest for long documents and writing quality. Perplexity's is the best for research because every answer carries sources. All three are usable daily without paying.
Why do they all cost $20 a month?
Because the market settled there. ChatGPT Plus, Claude Pro and Perplexity Pro are all $20, Gemini AI Pro is $19.99 and Microsoft 365 Premium is $19.99. Grok is the exception at $30. Claude and Perplexity both work out cheaper on annual billing, at about $17 a month.
Is the free version good enough for work?
For most people, yes, with one caveat: check whether your conversations are used to train the model, because on free tiers they often are. If you handle client data or anything confidential, that setting matters more than any feature comparison on this page.
Should I pay for more than one?
Rarely. Two free tiers covering different strengths, typically one for writing and one for research, beat a single subscription for most workloads. Pay when you hit rate limits mid-task often enough to be annoyed, and pay for the one you hit them on.
Which AI chatbot is rated highest?
ChatGPT and Claude both aggregate to 4.5, but the samples are not comparable: ChatGPT's comes from 3,347 reviews and Claude's from 30. Only ChatGPT's figure is statistically meaningful, and even that under-represents a category bought by individuals rather than through procurement.
Why do AI chatbots have so few reviews on comparison sites?
Because business software directories verify reviewers as customers of an organisation, and these tools are bought by individuals on personal cards. The review infrastructure was built for enterprise procurement, which this category largely bypasses. It is why a product used by hundreds of millions of people can show twenty-one reviews.
Does the free tier train the model on my conversations?
On most of these, by default, yes, with an opt-out in settings and usually a stricter default on paid plans. It is the single most important setting to check before pasting client work, an NDA document or anything confidential, and it matters far more than any capability difference in this article.
