Best free AI agents and assistants (2026)

Quick verdict: the best free pick for you

What each one gives you for free

We couldn't load Perplexity's pricing and help pages today (they block automated checks), so it's left out rather than guessed. Same for Grok's free-plan privacy defaults: unknown.

What's locked behind paid plans

Here's the pattern: free plans answer questions, write, search and make images. The agent features, like handing off a whole task, running it on a schedule or working inside your email and documents, mostly start at the first paid tier.

Two free exceptions: ChatGPT Free includes limited use of ChatGPT Work in the desktop app1, and Muse's free tier is an agent that takes actions, within a usage cap9.

Usage limits: how much "free" really is

• ChatGPT: text chats are unlimited, as long as your use is reasonable and follows OpenAI's policies. Uploads, images, voice, deep research and memory are capped1. OpenAI doesn't publish the exact numbers on its pricing page1.
• Claude: limits reset on a rolling five-hour window, and how far they go depends on how long and complex your chats are6. Settings → Usage shows where you stand6.
• Gemini: limits refresh every 5 hours until you hit a weekly cap, and you can buy AI credits to keep going4.
• Grok: the Free plan has "limited" chat and agent requests14. Paid plans share one weekly pool across Grok, Grok Bot and Cursor15.
• Copilot: the free version is limited and depends on available capacity8.
• Muse: a free usage limit that refreshes. Paid plans add a weekly token allowance9.

Privacy on free plans: is it training on your chats?

• ChatGPT: OpenAI may use your conversations to improve its models, and you can opt out anytime18: turn off "Improve the model for everyone" in Settings → Data controls13. Temporary chats aren't used for training and may be kept up to 30 days for safety13. Ads are a separate setting13.
• Claude: the pricing page lists training as "Opt-out" on Free6. Anthropic uses your chats to improve Claude if you allow it in your privacy settings, or if a chat is flagged for a safety review19. Incognito chats are never used, and raw connector data (like Google Drive) isn't either19.
• Gemini: with Keep Activity on, Google uses your activity to improve its services, including training AI, and human reviewers see some chats. Reviewed chats are kept up to 3 years20. With it off, future chats aren't used for training unless you send feedback, and are kept for 72 hours20. The catch: connecting Gmail and Drive needs Keep Activity on20. Google says your Gemini chats aren't used to show you ads20.
• Microsoft Copilot: in the current Copilot app (since 18 August 2026), your prompts, responses and files aren't used to train foundation models21. Without a Microsoft 365 subscription you may see ads, and you can switch off ad personalization in Settings → Personalization22.
• Muse: training is on when you first use it. Switch it off in Settings → Data controls; the change also covers past chats10. Muse doesn't share your chats with Meta's ad systems10.
• Grok: Grok Bot offers a training opt-out23. The default for free Grok chat: unknown.
• OpenClaw: it runs on your own computer and keeps its data there. By default an install only sends the project a daily version check, which you can turn off11. Your chats still go to whichever model provider you connect.

The free-plan rule of thumb: don't paste anything you wouldn't want a reviewer to read. Google says this outright for Gemini20. For business data, use a business plan where training is off by default136.

"Free" open-source agents: the honest cost

OpenClaw and Hermes Agent are free to download, with no subscription for the software1112. You talk to them through chat apps you already use, like WhatsApp or Telegram, and Hermes can run scheduled jobs unattended1112. What you actually pay for:

• The AI model. OpenClaw works with hosted, subscription-backed, gateway or local models11. Hermes says model providers and optional hosted services have their own pricing12. Nous Portal's free tier gives you free models only; paid tiers start at $20 a month with $22 of credits12. API usage is billed separately from consumer plans like ChatGPT Plus18, so a busy agent can cost more than a $20 subscription.
• A computer that stays on. OpenClaw runs on your own Mac, Windows or Linux machine11. Hermes's tasks don't run while the agent is stopped; cloud hosting is optional12.
• Your time and your security. You set it up and keep it updated. Read Is OpenClaw safe? before you connect your email, and see OpenClaw vs Hermes Agent to compare them.

When it's worth upgrading, and the cheapest step up

Upgrade when you keep hitting the limit, when you want the assistant to do tasks rather than answer, or when you want ads gone. Here's the cheapest paid step for each:

Prices are US list prices as shown on 21 Oct 2026, before tax. ChatGPT's pricing page didn't show prices when we checked, so the Go price is the launch price from OpenAI's January 2026 announcement2. Microsoft 365 Premium, which adds Copilot's Researcher, Analyst and Cowork agents, is $19.99 a month816. Full price lists are on our pricing tracker and in how much does an AI agent cost.

Our take by type of person

• Founders and business owners: free tiers are fine for testing ideas and personal research, not for customer or company data. When it becomes part of your work, budget for business seats, where training is off by default136.
• Everyday users: start with ChatGPT Free or the Gemini app. If you hit limits weekly, Google AI Plus at $4.995 is the cheapest real upgrade we found today.
• Microsoft households: free Copilot for chat; Microsoft 365 Personal at $9.99 a month if you want it inside Word and Outlook8.
• People who want errands done: try Muse's free tier if it's available where you live9. Otherwise, agents that run tasks on their own, like ChatGPT dots, Claude's hand-off tasks or Grok Bot, are paid features1615.
• Tinkerers: OpenClaw or Hermes with a model you already pay for or a free one, on a spare computer1112.

Choosing between paid plans? Read the best AI agent for personal use, ChatGPT vs Gemini, Claude vs Gemini, or the full buyer's guide.