Best Free AI Agents in 2026
AI agents broke the pricing model that every other software category runs on, and nobody talks about it in comparison articles.
Ordinary software charges per seat. You know how many people you have, so you know what you will pay. Agents charge per credit, per execution, or per token, which means the bill depends on how much work the software does, and you find out how much work it does after you deploy it.
That single fact should reorder how you read every free tier below. "Free" for an agent platform does not mean an unlimited plan with features removed. It means a quantity of work, after which it stops.
What each free tier actually gives you
Verified against Toolradar's pricing records, checked between 15 and 19 August 2026.
| Tool | Free tier | First paid tier | Price checked |
|---|---|---|---|
| n8n | Free, self-hosted, unlimited | Cloud from $20/month | 16 Aug 2026 |
| Relay.app | Free tier | Pro, $19/month | — |
| CrewAI | Basic, 50 executions/month, 1 user | Professional, $25/month | 15 Aug 2026 |
| Manus | Free, 1,000 credits | Starter, $39/month for 3,900 credits | 19 Aug 2026 |
| Devin | Free tier | see current pricing | not in directory |
n8n's free tier is the only genuinely unlimited one in this article, and it is unlimited for a specific reason: you host it yourself, so the compute is your problem rather than theirs. Every other free tier is a metered allowance.
One honest note on Manus. Our earlier working notes recorded a $20 Standard tier; Toolradar's record, checked 19 August 2026, lists Starter at $39 for 3,900 credits and Pro at $199. We cannot reconcile those from the outside, so treat the verified figure as current and check the pricing page before you budget around it.
How they rate
Aggregated by Toolradar across G2, Capterra and other platforms.
| Tool | Aggregated rating | Reviews |
|---|---|---|
| Relay.app | 4.9 | 89 |
| n8n | 4.7 | 264 |
| CrewAI | 4.5 | 3 |
Manus and Devin have no aggregated ratings at all.
n8n's 264 reviews is the only sample worth reasoning about, and 4.7 on that many is a genuinely strong result. Relay.app's 4.9 across 89 is promising and small. CrewAI's 4.5 comes from three reviews, which is not a rating in any meaningful sense, and we would rather say so than print it next to n8n's as though they were comparable evidence.
The absence of ratings for Manus and Devin is itself informative. Both are recent, both are sold to individual developers rather than through procurement, and neither has accumulated the kind of review corpus that a directory can aggregate.
n8n, the one you should try first
n8n is a workflow automation tool that grew agent capabilities, which turns out to be the right order to do it in. You build a flow visually, and any node in that flow can be an AI agent with tools, memory and a model of your choosing.
The reason it leads this list is the free tier. Self-hosted n8n is free, with no execution cap, because you are paying in a server rather than in credits. A small VPS runs it comfortably. If your automation touches private data, this is also the only option here that never sends it to a vendor.
Cloud starts at $20 a month, checked 16 August 2026, and exists for people who do not want to run anything.
The trade is real: self-hosting means you patch it, back it up and fix it when it breaks at an inconvenient hour. Teams that value their evenings pay the $20.
4.7 across 264 reviews, the best-evidenced score in the category.
Relay.app, the one that assumes a human is involved
Relay's distinguishing idea is that most useful automations should pause and ask a person before doing something consequential. It builds human approval into the flow as a first-class step rather than as a workaround.
That sounds minor and changes what you are willing to automate. An agent that drafts and sends customer emails is a risk. An agent that drafts them and waits for a thumbs-up is a time-saver, and the difference is one design decision.
Free tier available; Pro is $19 a month, with Team at $69. Its 4.9 across 89 reviews is the highest score here, on a sample too small to be conclusive but large enough to be encouraging.
CrewAI, when you want agents in code
CrewAI is a Python framework for multi-agent systems: you define agents with roles, give them tools, and let them delegate to each other. The open source library is free and always will be.
The hosted platform is where the numbers above apply. Basic gives 50 executions a month with one user, checked 15 August 2026, and Professional is $25 a month.
Fifty executions is a development allowance. It is enough to build and test a crew, and nowhere near enough to run one in production, which is presumably the intention.
The honest assessment of the multi-agent approach: it is genuinely powerful for research and analysis tasks where several perspectives help, and it multiplies token cost and latency for tasks a single well-prompted call would have handled. Most people's first crew should have been one agent.
Manus, the general-purpose one
Manus takes an instruction in plain English and works on it autonomously across a browser and a terminal, producing a finished artefact rather than a chat reply.
When it works, it is the closest thing here to the promise the phrase "AI agent" makes. When it does not, you have spent credits finding out. The free tier is 1,000 credits, and a substantial task consumes them faster than you expect, which is the recurring theme of credit pricing.
At $39 a month for 3,900 credits, checked 19 August 2026, the arithmetic is straightforward and unusually visible: roughly a cent per credit, and you should measure what one of your typical tasks costs before committing.
Devin, the autonomous software engineer
Devin is aimed at a narrower job than the others: given a ticket, it opens a branch, writes code, runs tests and opens a pull request.
It is not in the Toolradar directory, so we have no aggregated rating and no verified price to publish, and we are not going to repeat numbers we cannot check. See its current pricing directly.
What we can say about the category: autonomous coding agents are excellent at well-specified mechanical work, such as migrating an API across two hundred call sites, and unreliable at anything requiring judgment about what the code should do. Give it the boring job.
Where credit pricing bites
This is the part worth internalising, because it applies to four of the five tools above and to nearly every agent platform arriving next year.
You cannot forecast an agent bill from headcount. A team of three running one heavy research agent daily will spend more than a team of thirty running a light notification agent. The variable is the work, and the work is decided by your users and your prompts rather than by your org chart.
Retries are billed. An agent that fails halfway and restarts has consumed credits for the failed attempt. Flaky tools, rate-limited APIs and long chains all multiply this, and none of it appears in a pricing table.
Verbose agents cost more than good ones. A crew of five agents debating a question consumes several times the tokens of one agent answering it. The multi-agent architecture that looks impressive in a demo is the one that shows up on the invoice.
The practical defence is the same everywhere: run your real workload on the free tier, measure what one execution costs, multiply by your expected volume, and only then look at the plans. Every free tier in this article is large enough to answer that question, which is the most useful thing about them.
What to pick
Start with n8n self-hosted. It is free without an asterisk, it covers most of what people mean when they say they want an agent, and the thing you learn from building in it transfers.
Choose Relay.app if the automation touches customers and you want a human in the loop by design.
Choose CrewAI if you are writing Python and genuinely need several specialised agents, not because multi-agent sounds more advanced.
Try Manus on your hardest one-off task, and count the credits.
And ignore the 4.5 next to CrewAI. Three reviews is not evidence, and the only score in this article with enough weight to lean on belongs to n8n.
Related reading: free AI automation tools, free AI tools and free vibe coding tools.
