n8n review: self-hosted agent workflows with human review of tool calls

Contents

1. Human review of tool calls
2. Hosting and licence
3. How it is billed
4. Published evidence
5. Strengths and limits
6. Pricing
7. Questions to ask before building on n8n
8. Sources

Type	Workflow and agent platform
Headquarters	Berlin, Germany
Founded	2019
Pricing	Published
Website	n8n.io

n8n, founded in Berlin in 2019, is a visual workflow builder with the option to drop into code⁠12n8nWikipediaAI workflow automation platformn8n. Its AI Agent node connects a chat model to one or more tools and lets the agent decide which to call; at least one tool must be connected⁠3AI Agent noden8n Docs.

Best for: Companies with a technical owner that want agents inside workflows they can self-host, with human review of any tool call in the channel the reviewer already uses.

Not the right fit for: Operations teams with nobody comfortable with workflow logic, or companies that want to resell or host n8n for others.

Human review of tool calls

n8n can pause a workflow before an agent uses a tool. The reviewer sees which tool the agent wants to call and with what parameters; on approval the tool runs with those inputs, and on denial it does not run and the agent is told. Review can be required for all tools or selected ones, works in sub-agents, and can be answered in n8n Chat, Slack, Discord, Telegram, Microsoft Teams, Gmail, WhatsApp Business, Google Chat or Outlook⁠4Human-in-the-loop for toolsn8n Docs.

Hosting and licence

The Community Edition is self-hosted and free, but it lacks environments, external secrets, log streaming, projects, SSO, shared credentials, Git version control and multi-main mode⁠5Compare editionsn8n Docs. Audit logging and log streaming are Enterprise features⁠6n8n plans and pricingn8n. The Sustainable Use License permits use only for a company's own internal business purposes or for non-commercial or personal use, and enterprise-marked files need a commercial licence⁠7Sustainable Use License 1.0 (LICENSE.md)n8n on GitHub.

How it is billed

Cloud plans are billed per execution, where an execution is one run of a whole workflow regardless of its steps or data volume. Prices are published in euros, billed annually: Starter €20 a month for 2,500 executions with a five-minute limit per run, Pro €50 for 10,000 with a 40-minute limit, and a self-hosted Business plan at €667 for 40,000 with SSO and Git version control⁠6n8n plans and pricingn8n.

Published evidence

• Vodafone. n8n reports that Vodafone launched 33 workflows from August 2024, saving 5,000 person-days and £2.2 million in avoided costs, with continued savings of about £300,000 a month in 2025. Vendor-reported.⁠8Leveraging automation in cybersecurity: Vodafonen8n

Strengths and limits

Strengths

• Human-in-the-loop review shows the reviewer which tool the agent wants to use and with what parameters, before it runs.
• Can run on the company’s own servers, which keeps data and credentials in-house.
• Executions count whole workflow runs regardless of steps, which makes complex flows cheaper to forecast.
• Publishes a named, quantified case: Vodafone (vendor-reported).

Limits

• The Sustainable Use License allows use only for internal business, non-commercial or personal purposes.
• The Community Edition lacks SSO, projects, environments, log streaming and Git version control; audit logging is Enterprise-only.
• Cloud plans cap execution time (five minutes on Starter, 40 on Pro).
• Visual but technical: agents are built as workflows, which suits a technical owner more than an operations lead.

Choose another option if: No one on the team will own the workflows, or you need audit logging without an Enterprise contract. Lindy or OpenLazarus ask less of the operator.

Pricing

Published in euros, billed annually: Cloud Starter €20 a month for 2,500 executions; Pro €50 for 10,000; self-hosted Business €667 for 40,000. Enterprise on request.

Questions to ask before building on n8n

• Who on our team will own the workflows and the server they run on?
• Which tool calls should require review, and in which channel will reviewers answer?
• Do we need audit logging, and therefore Enterprise?
• Does our intended use fit the Sustainable Use License?

See how n8n compares with the other agent builders in the main ranking.

Sources

1. n8n. Wikipedia. Accessed 8 Nov 2026.
2. AI workflow automation platform. n8n. Accessed 8 Nov 2026.
3. AI Agent node. n8n Docs. Accessed 8 Nov 2026.
4. Human-in-the-loop for tools. n8n Docs. Accessed 8 Nov 2026.
5. Compare editions. n8n Docs. Accessed 8 Nov 2026.
6. n8n plans and pricing. n8n. Accessed 8 Nov 2026.
7. Sustainable Use License 1.0 (LICENSE.md). n8n on GitHub. Accessed 8 Nov 2026.
8. Leveraging automation in cybersecurity: Vodafone. n8n. Accessed 8 Nov 2026.

Further reading

• Buyer's guide · Updated quarterlyThe best no-code AI agent builders for company work in 2026An analysis of seven platforms for building AI agents without code, judged on the controls a company needs before an agent changes a real order, invoice or customer record.
• Guide · ControlAI agent permissions and approvals: how to let agents act safelyAn agent's permissions are a job description written in advance. The platforms differ less in whether they offer approvals than in where those approvals apply and what record they leave.
• Guide · CostWhat no-code AI agents cost: credits, actions, executions and the monthly billEvery platform meters agent work in its own unit. Converting those units into the cost of one task is the only way to compare them, and the only way to avoid the cost overruns Gartner expects to end many projects.