Pricing & Comparison
Free AI Assistant: What You Actually Get for $0
Every major AI assistant has a free tier. None of them are free the way a hammer is free — you own it, you use it, no conditions. The real question is not "is it free?" It is "can I rely on it?"
Louis Amira
CEO, Circuit & Chisel
Search "free AI assistant" and you will find a lot of yes answers. ChatGPT is free. Claude is free. Perplexity is free. Gemini is free. Technically, every one of those statements is true. But free for what, exactly? Free to try twice before hitting a rate limit is not the same as free to use for real work.
This guide separates genuinely free from nominally free. For each tool, you will see exactly what the free tier covers, where the ceiling is, and who it actually works for. If you are trying to avoid a subscription and still get real value, this is the honest breakdown.
A "free AI assistant" typically falls into one of two categories: freemium (free tier with hard limits that push you toward a paid plan) or free-to-start (no charge until you use it, then you pay for what you use). Most tools people call "free AI assistants" are freemium — they give you enough to try the product, then throttle you. A free-to-start model, like Deputy's pay-as-you-go pricing, is structurally different: you pay for work done, not access granted.
By the numbers
$60–100
Average monthly spend across AI subscriptions for a typical knowledge worker running ChatGPT, Claude, and one other tool simultaneously, per the Productiv 2025 SaaS Benchmark Report
68%
of free-tier AI users report hitting rate limits within a typical week of active use, per OpenAI's published usage data
77%
of executives say AI has increased workforce productivity in at least one area, per McKinsey State of AI 2024 — but that productivity is tied to tools people actually use daily, not ones they bounce off of
What "free" usually means in AI tools
AI companies operate on expensive infrastructure. When they say a tool is free, the economics work one of three ways: they are acquiring users to convert to paid, they are training on usage data, or the free tier is so limited it drives frustration toward an upgrade. Often all three at once.
That is not a cynical take — it is just how the business model works. The useful question is not whether a company has a free tier, but whether the free tier is usable for your actual use case. For light, occasional queries, most free tiers are adequate. For daily work — multiple sessions, follow-through on tasks, persistent memory — they almost all fall short without a subscription.
5 free AI assistants: what you get and where the limit is
ChatGPT (Free Tier)
Best free general-purpose chat
ChatGPT's free tier is the most widely used AI product in the world. It runs on GPT-4o mini — a capable model for general questions, writing help, and simple tasks. For a lot of people, it is genuinely enough for casual use.
What's free
Unlimited GPT-4o mini access. Limited GPT-4o messages per session. Basic chat, writing, and code help.
Where the limit is
Rate-limited after a few GPT-4o messages per session. No memory between conversations. No custom GPTs. No file uploads or image generation on free.
Who it works for
Occasional users who need a smart writing or Q&A tool a few times a week and do not need continuity between sessions.
Claude (Free Tier)
Best free option for nuanced writing
Claude's free tier gives access to a genuinely excellent AI for writing, analysis, and reasoning. Anthropic has built a tool that produces unusually human-sounding prose and hedges appropriately — which matters for professional use. The quality is there. The quantity is not.
What's free
Access to Claude's core model. Capable chat, writing assistance, and document analysis when available.
Where the limit is
Daily message limits that are lower than competitors. No project memory. No access to Claude's extended context window. Throttled during peak hours.
Who it works for
Writers and analysts who need high-quality output on a few tasks per day and can live with the session ceiling. See the full AI assistant comparison.
Perplexity (Free Tier)
Best free research tool
Perplexity is built for research — it searches the live web and cites its sources inline. The free tier gives you that capability in a limited form. Standard searches are unlimited and genuinely useful. The premium "Pro" searches (which use more powerful underlying models) hit a daily ceiling fast.
What's free
Unlimited standard searches. 5 Pro searches per day. Citations included on all searches.
Where the limit is
5 Pro searches per day before rate-limiting to standard model. No file uploads. No Spaces (shareable research collections) on free.
Who it works for
Light researchers who need sourced answers a handful of times per day — not a daily research workflow.
Gemini (Free Tier)
Best free option with Google integration
Gemini's free tier is the most capable in terms of raw daily usability — the model is solid, the rate limits are more generous than most competitors, and if your work runs through Google (Gmail, Docs, Drive), the integrations are available at no cost. The free tier is not a stripped-down taste test; it is a usable product.
What's free
Access to Gemini 1.5 Flash. Google Workspace integration. Higher daily limits than ChatGPT or Claude free tiers.
Where the limit is
Gemini Advanced (the more powerful model) requires Google One AI Premium at $19.99/month. Deep Workspace AI features require Workspace Business.
Who it works for
Google Workspace users who want AI in their existing tools without paying extra — and do not need the most powerful underlying model.
A different kind of free
Deputy is free until it does work
No rate limits. No monthly subscription. You pay only when Deputy takes action. Sign up free and it costs nothing until you use it.
Try Deputy FreeDeputy
Free to start — pay only when it acts
Deputy is structured differently from the other tools here. There is no free tier with a ceiling — there is no subscription at all. Deputy is a personal AI assistant that lives in your text messages, and you pay only when it does something: sends a follow-up email, schedules a meeting, fires a reminder. If it does nothing in a given day, you pay nothing. There is no rate limit because there is no flat fee to protect.
What's free
Signing up, getting your Deputy number, configuring your preferences. No cost until Deputy takes an action.
Where the limit is
Deputy charges per action, not per session. Heavy users who ask Deputy to run many tasks in a day will spend more than light users. The model is honest about this.
Who it works for
Busy professionals and small business owners who need AI to execute tasks — not just answer questions. Especially useful if you want to avoid flat subscription costs. See how Deputy compares to ChatGPT.
Free tier comparison: what each tool gives you
This table covers what each tool actually provides for free, where the hard limit is, and what a paid plan costs if you need more. The goal is not to pick a winner — it is to find the tool that fits your usage pattern without paying for what you do not need.
| Tool | What's free | Hard limit | Paid starts at |
|---|---|---|---|
| ChatGPT | GPT-4o mini, limited GPT-4o messages | Rate-limited mid-session; no memory or file uploads | $20/mo (Plus) |
| Claude | Core model access, capable chat and writing | Daily message cap; no project memory; throttled at peak | $20/mo (Pro) |
| Perplexity | Unlimited standard searches; 5 Pro searches/day | 5 Pro searches/day; no file uploads; no Spaces | $20/mo (Pro) |
| Gemini | Gemini 1.5 Flash; Google Workspace integration | Advanced model and deep Workspace AI require paid plan | $19.99/mo (Google One AI Premium) |
| Deputy | Sign up, setup, your Deputy number — all free | No rate limit — charges per action, not per session | Pay-as-you-go |
"Anything that the user can't do themselves. Don't sell the future."
Louis Amira
Founder & CEO, Deputy / Circuit & Chisel
The honest verdict on free AI assistants
"Free" in the AI assistant market almost always means "rate-limited freemium." You get access to a capable tool, and then you hit a ceiling designed to push you toward a subscription. That is a legitimate business model — and in many cases the paid versions are worth the cost. But it is worth being honest about what you are getting before you commit.
If you use AI occasionally — a few times a week, for one-off tasks — most free tiers will hold up. Gemini's free tier is the most capable for daily Google Workspace use. Claude and ChatGPT's free tiers are high quality when the models are available. Perplexity's standard search is genuinely useful without paying.
If you want an AI that operates continuously — follows up on leads, fires reminders, handles scheduling without you — no freemium tier covers that. Deputy is free to start and only costs when it takes action. That is a structurally different model from every other tool here. See the full breakdown of what AI subscriptions actually cost across a year to put the math in context.
The question to ask is not "which AI assistant is free?" It is "which AI assistant can I actually rely on for my specific use case, at a price I can defend?" Those are different questions — and the answers are not the same for everyone.
Frequently asked questions
Is there a truly free AI assistant?
Every major AI assistant offers a free tier, but all of them hit a wall — rate limits, feature paywalls, or both. ChatGPT free runs on GPT-4o mini with session rate limits. Claude free caps your daily messages. Perplexity free limits you to 5 Pro searches per day. Gemini's free tier is the most capable without a subscription. Deputy is free to sign up and only charges when it takes action — so if it does nothing, you pay nothing. That is the closest thing to genuinely free in the current market.
Can I use ChatGPT for free?
Yes. ChatGPT's free tier is available without a credit card and runs on GPT-4o mini, which handles most general tasks well. The limits kick in during sustained use — rate limits after a certain number of messages per session, no memory between conversations, and features like custom GPTs and image generation are paywalled. For light, occasional use the free tier is adequate. For daily professional use, most people hit the ceiling within a few sessions.
What is the best free AI assistant in 2026?
For general-purpose daily use, Gemini's free tier is the strongest — it runs a capable model with more generous limits and integrates with Google Workspace at no cost. For occasional research, Perplexity's free tier covers 5 high-quality sourced searches per day. For writing and reasoning quality, Claude is excellent when available. The best choice depends on your use case. For a full comparison of paid and free options, see our best AI assistants guide.
Is Deputy free?
Deputy is free to sign up. There is no monthly subscription — you pay only when Deputy takes action on your behalf (sending follow-ups, scheduling appointments, firing reminders). If it does nothing in a given day, there is no charge. That is structurally different from a freemium tier with rate limits — it is pay-for-work, not pay-for-access. Most users who run 1–3 tasks per day spend just a few dollars a month.