I Built an Auto-Reply Workflow in n8n Without Paying for an AI API

Description and use

An automated confirmation email workflow triggered by a form, using a local Ollama AI model and n8n, without paying for an API and with a 10‑second delay.

Problem

The author needed an automated confirmation email workflow without paying for an AI API and without instant email sending.

Outcome

The workflow successfully sent personalized confirmation emails upon form submission, demonstrating that a paid AI API is not required and that a short wait can prevent instant sending.

Workflow

• On form submission trigger starts the workflow
• Chat model node drafts email using local Ollama OpenAI-compatible API
• Wait node delays 10 seconds
• Gmail node sends drafted email to form submitter

Evidence

I built my first n8n workflow: a manual trigger that sent an email through Gmail. It worked, but it was very basic.

Source

I imagined I'm running an AI solutions consulting business. Whenever someone wants help, the first step is filling out an onboarding form.

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I looked for an alternative and found Ollama, a tool that lets you run AI models locally on your own computer.

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During testing, the email went out the moment I clicked submit. I wanted a small gap between drafting and sending, so I added a Wait node set to 10 seconds between the chat model and Gmail.

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The workflow worked end to end. Submitting the form triggered a personalized email that greeted the person by name, repeated their details for confirmation, and explained the next step.

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