Newsletter Growth Report · Marketing
Your newsletter's week in one Slack message
Every Monday: your Mailchimp audience size and change, the week's sends, opens and clicks added up in code, the best subject line and one thing to try.
Free account to start. Buying and running live need a paid plan.
- Runs on a schedule
- 1 AI step
- About 10 min to set up
Sound familiar?
The job, before and after this agent.
What it feels like today
- “We only look at newsletter stats when something feels off.”
- “Checking Mailchimp reports campaign by campaign takes time nobody has.”
- “We don't know if the list is actually growing week to week.”
What you get with the agent
- The week's campaigns from Mailchimp, with sends, unique opens and unique clicks added up in code.
- Open and click rates per campaign, and for the whole week, worked out in code.
- Your audience size compared with last week's report, in code.
- The campaign with the best open rate named, and one concrete suggestion for next week.
Before
Once a quarter someone exports Mailchimp reports into a spreadsheet to see whether the newsletter is working.
After
Monday at 8:00 Slack shows the audience grew by 30, Thursday's issue had the best open rate, and the suggestion is to test a question in the subject line.
How it works
The whole workflow, step by step.
Every Monday the agent reads your audience's newest sent Mailchimp campaigns and keeps, in code, the ones sent in the last 7 days. From what Mailchimp reports it works out in code each campaign's open and click rate, the week's emails sent, unique opens and unique clicks, and your audience size compared with the last report's. AI writes a one-line headline, names the campaign with the best open rate and suggests one thing to try next week, without restating the numbers. The report goes to your Slack channel. Mailchimp only; new subscribers and unsubscribes aren't shown separately, only the net change in audience size.
- TriggerMondays at 8:00
- App callRead your sent campaigns
- LogicKeep the last 7 days
- LogicAdd up the week
- LogicLast week's audience size
- LogicRemember this week's audience size
- LogicAudience change
- LogicEach campaign this week
- OutputListed
- LogicList the campaigns
- AI stepOne suggestion
- App callPost the report
- OutputReport posted
This is the workflow that opens in your workspace when you set the agent up. Every step can be edited.
- Step 1Mondays at 8:00Runs every Monday morning and covers the campaigns sent in the last 7 days. Set your time zone on the trigger.
- Step 2Read your sent campaignsLists your audience's 20 newest sent Mailchimp campaigns with what Mailchimp reports for each: emails sent, opens, clicks, rates and the audience size.
- Step 3Keep the last 7 daysIn code, not AI: keeps the campaigns sent in the last 7 days (today included, in your time zone).
- Step 4Add up the weekIn code, not AI: open and click rates per campaign (from Mailchimp's own rates), and the week's emails sent, unique opens and unique clicks with the overall rates.
- Step 5Last week's audience sizeReads the audience size remembered from the last report.
- Step 6Remember this week's audience sizeStores the audience size Mailchimp reports on your newest sent campaign, next to last week's (kept 60 days).
- Step 7Audience changeIn code, not AI: this week's audience size minus last report's.
- Step 8Each campaign this weekLists this week's campaigns with their numbers (up to 20).
- Step 9ListedNothing is changed in Mailchimp.
- Step 10List the campaignsIn code: one line per campaign with Mailchimp's numbers.
- Step 11One suggestionAI reads the week's numbers (computed in code) and writes a one-line headline and one concrete suggestion, without restating the numbers.
- Step 12Post the reportPosts the numbers (from code) and the suggestion to your Slack channel.
- Step 13Report postedThe run history keeps every report.
Example run
What goes in, and what comes out.
Example with fictional data
Comes in
Mailchimp, last 7 days: one campaign “October news” sent to 1,200, with 500 unique opens and 60 unique clicks; last report's audience was 1,180.
The agent produces
Slack: audience 1,210 (change since last report: 30), 1,200 emails sent, 500 unique opens, 60 unique clicks with the rates, “October news” as the best open rate, and one suggestion.
What you need
Everything it takes to run it.
About 10 minutes from purchase to live. A checklist above the canvas takes you through each step.
Plan
Included in Enterprise; on other paid plans it's $59 once. Agents run live on paid plans, from Basic ($39/mo).
Your AI key
Connect any of 15 AI providers on your own key. Your provider bills usage directly, at cost; we add no markup.
Checklist
- A paid plan (agents run live on paid plans).
- An AI provider key (Settings → AI Providers).
- Mailchimp and Slack, connected in Settings → Integrations.
Setup, about 10 minutes
- Connect your AI provider. The AI steps run on your own key (OpenAI, Anthropic, Google and more). Add one in Settings → AI Providers.
- Connect Mailchimp. Connect Mailchimp with an API key (Settings → Integrations → Mailchimp).
- Connect Slack. Connect the Slack workspace for the report (Settings → Integrations → Slack).
- Pick your audience. Open “Read your sent campaigns” and pick the account and your audience id.
- Describe your newsletter. Open “One suggestion” and replace the placeholder.
- Pick the Slack channel. Open “Post the report” and pick the workspace and channel.
- Test it with Dry Run. Press Dry Run: the agent runs on sample data with no messages sent and nothing written to your apps.
- Switch the trigger on. Open the trigger, set your time zone and switch the schedule on. It runs every Monday at 8:00.
Is it a fit?
Who it's for, and what it won't do.
Built for
- Small businesses sending newsletters with Mailchimp
- Agencies reporting newsletter results to a team
- Founders who want a weekly pulse without logging in
What it doesn't do
- Mailchimp only: Kit and beehiiv stats aren't read by our connections.
- New subscribers and unsubscribes aren't shown separately: only the net change in audience size between reports (the first report has nothing to compare with).
- It reads the 20 newest sent campaigns; it doesn't read automations or per-link clicks.
- Numbers are exactly what Mailchimp reports; it doesn't send or change anything.
We list the limits up front so you can decide before you buy.
Price
$59 one-time
Per workspace. It never renews.
- Included at no extra cost on Enterprise.
- Buying and running it live need a paid plan, from Basic ($39/mo).
- Dry Run costs nothing: simulated AI and app calls, nothing sent.
- AI usage is billed by your own provider, at cost. No AI credits to buy from us.
One-time agent purchases aren't covered by the 30-day money-back guarantee. Refund policy
FAQ
Questions about Newsletter Growth Report.
Can the AI get the numbers wrong?
The AI doesn't handle the numbers: they come from Mailchimp and are added up in code. It only writes the headline and the suggestion.
Does it show new subscribers and unsubscribes?
Not separately. Our Mailchimp connection doesn't read those counts, so the report shows the net change in audience size between reports.
What about Kit or beehiiv?
This report reads Mailchimp only; our Kit and beehiiv connections don't read opens or clicks.
Is it worth it?
It's a one-time purchase that never renews and gives you a weekly pulse with no manual reporting. Running it live needs a paid plan; Dry Run is free.
Is this a subscription?
No. Newsletter Growth Report is a one-time purchase of $59 per workspace and never renews. The Enterprise plan includes it at no extra cost. Running it live needs a paid plan (from Basic ($39/mo)), and your AI provider bills you directly for usage.
Can I test it before it touches real data?
Yes. Once it's set up in your workspace, Dry Run plays every step on sample data with simulated AI and app calls: nothing is sent and nothing in your apps changes. Switch the trigger on only when you're happy.
Put Newsletter Growth Report to work.
Free account, no credit card. Your Agents page opens with Newsletter Growth Report ready to buy and set up, then Dry Run it before it goes live.