Weekly Competitor Tech Stack Intelligence Email (BuiltWith + Gmail)

Build me an agent workflow that runs every Monday at 7am in my timezone and emails me a weekly technographic intelligence digest about a watchlist of companies.

The workflow should expose this configuration: a watchlist of domains (competitors, partners, and key prospects), a small list of technology categories I care about (for example CDP, analytics, payments), a list of recipient email addresses, a 'skip noise' filter so I can drop low-signal change types like CDN, ad pixel, and font swaps, and a tone setting that flips between analyst-formal and casual.

On each run, the trigger is a cron schedule for every Monday at 7am.

First, for each domain in the watchlist, call BuiltWith's Change API to get technology additions and removals over the past 7 days. Keep the AI-generated business-context blurbs that come back with each change, because that is the narrative the email is built on.

Second, for each technology category I configured, call BuiltWith's Trends API to pull adoption movement across the BuiltWith index. Identify which technologies in each category are gaining or losing share the fastest over the past week.

Third, apply the 'skip noise' filter so low-signal changes are dropped before the agent writes anything.

Fourth, synthesize everything into a single email body with three sections. Start with a one-paragraph executive summary that names the most interesting move of the week. Then a 'Moves on my watchlist' section grouped by company, listing the changes that matter and why they matter, using the BuiltWith business-context blurbs to explain the so-what. Then a 'Category momentum' section that highlights the technologies gaining or losing share fastest in my chosen categories. If a domain on the watchlist had no changes that week, mention it briefly under a 'Quiet this week' line so I know it was checked.

Fifth, pick a subject line that surfaces the single most interesting headline of the week, something like 'Acme dropped Segment for RudderStack' or 'Stripe gaining ground in fintech'.

Finally, send the email via Gmail's Send a Message action to my recipient list. Match the tone setting (analyst-formal vs casual) on every prose section, including the subject line.

Additional information

What does this prompt do?

Watches a list of competitor, partner, and prospect websites and surfaces every tool they added or dropped in the past 7 days.
Tracks the technology categories you care about (like CDP, analytics, or payments) and calls out which tools are gaining or losing ground across the web.
Writes a one-paragraph executive summary at the top so you know the headline of the week before you finish your first coffee.
Sends the briefing to your chosen stakeholders with a subject line built around the most interesting move of the week.

What do I need to use this?

A BuiltWith account with a paid plan (the Change data this digest depends on is a paid feature).
A Gmail account that can send email on your behalf.
A short list of company websites to watch and the technology categories you care most about.

How can I customize it?

Edit the watchlist of companies, the technology categories, or the recipient list at any time.
Filter out low-signal noise like CDN swaps, font changes, and ad pixels so only strategic moves make it into the email.
Switch the tone between analyst-formal and casual, or move the send time to a different morning of the week.

Frequently asked questions

Will this work on a free BuiltWith account?

Not for this digest. The week-over-week change data and category adoption trends come from BuiltWith's paid APIs, so you'll need a plan that includes Change and Trends access.

What happens if a company on my watchlist did not change anything last week?

The email lists it under a short 'Quiet this week' line so you know it was checked and there was simply nothing new.

Can I send the digest to more than one person?

Yes. The recipient list is just a configuration field, so you can email it to a single owner, a leadership team, or a shared distribution alias.

Does the agent really pick the subject line?

Yes. It scans the week's changes, identifies the single most interesting headline, and writes a subject line around it so the inbox preview already tells you the story.

How do I cut out noise like CDN or ad pixel changes?

There is a skip-noise filter in the configuration. You name the categories you do not want to hear about, and the agent drops those changes before writing the email.