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Workflow

Competitor watch to Slack

Every Monday, what your competitors changed last week, in one Slack message.

By
Caleb and Ryan, the founders
Updated
August 28, 2026
Version
1.0, in the library
  • n8n
  • Anthropic API

An n8n workflow that fetches a list of competitor pages weekly, diffs them against last week's copy, asks a model to say what changed in plain words, and posts one message to the channel you choose. Pricing pages, careers pages, changelogs. Silent when nothing changed.

Built, documented, running.

Part of the working library we deploy from on every engagement.

Bring this into a project

Runs on

  • n8n
  • Anthropic API

3 requirements and 3 install steps, below.

  • Complete and documented: the same files we run ourselves.
  • Deployed and tuned to your stack as part of an engagement.

The file

Draft excerpt
You are reading a diff between last week's copy of a competitor's page andthis week's. Say what changed in at most two sentences, in plain words, theway a colleague would mention it in a Monday meeting. Rules:- If only dates, tracking codes or whitespace changed, reply NOTHING.- Quote a price or a headline exactly if one changed.- Never guess why. Say what, not why. Page: {{ $json.url }}Diff:{{ $json.diff }}

What is inside

4 items. Includes deployment guide, sample data.

  • workflows/competitor-watch.jsonThe n8n workflow: schedule, fetch, diff, summarise, post.
  • watchlist.example.csvTen example pages to replace with your own.
  • prompts/summarise-diff.mdThe prompt that turns a diff into two sentences a salesperson can use.
  • GUIDE.mdImport, credentials, the first run, and what to do when a site blocks fetches.

Who it is for

  • Someone on your team checks competitor sites by hand, or nobody does.
  • You want to know the week a competitor raises prices, not the quarter.
  • You already run n8n, or are willing to for this.

Requirements

  • n8n, cloud or self-hosted
  • An Anthropic API key
  • A Slack incoming webhook

Install

  1. 01

    Import the workflow in n8n: Workflows, Import from file.

  2. 02

    Add your Anthropic key and Slack webhook as credentials.

  3. 03

    Replace watchlist.example.csv with your pages and run it once by hand.

Where this sits

  1. This system

    Competitor watch to Slack

    In the library, running.

  2. Pairs with

    The install call

    We import it, connect the credentials, and load your real watchlist together.

  3. In your stack

    Deployed on an engagement

    The audit finds which system earns its place first; we install and tune it around how you work.

Questions

Does it work with Make or Zapier?
This one is n8n. The pack rung has the same watch built for Make; ask and we will point you at it when it lands.
What does it cost to run?
A few cents a week in API calls for ten pages. The guide shows the number for your list.
What if a site blocks it?
The guide covers it: most pages fetch fine; for the ones that do not, the workflow logs the failure instead of posting a false quiet.
Can it watch more than pages?
Job boards and app store listings work as pages. Social feeds do not; the research behind this catalog refuted social pipelines and so do we.

Changelog

  1. August 28, 2026In the library. Version 1.0 runs in our own operation.

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