For Mailchimp accounts of 2k–100k contacts
Mailchimp bills you for every contact — including the ones who unsubscribed, never open, and never bought a thing. acadion uses AI to spot the ones who are gone for good, archives them automatically, and drops your bill a tier. Every month.
Read-only audit first. Nothing is archived until you approve your rules. Archiving is reversible.
of a typical list is unsubscribed or hasn't engaged in over a year — and still gets billed.
revenue from an unsubscribed contact. Mailchimp charges for them anyway.
typical savings for a 10k list after the first audit. Most accounts drop at least one billing tier.
No CSV exports, no Zapier duct tape, no monthly chore. Connect once and acadion keeps your audience — and your bill — clean.
Secure OAuth — two clicks, no API keys. acadion runs a read-only audit and shows exactly which contacts cost you money and why.
Decide what "dead" means for your business: opens, clicks, purchases, or any combination. Preview who matches before anything happens.
acadion archives on your schedule, guards against re-synced contacts, and sends you a monthly report: contacts archived, dollars saved.
Every business is different: a newsletter cares about opens, a store cares about orders. Your archiving rules match how you actually make money.
Combine open activity, click activity, purchase history, Mailchimp's own member rating and signup age with AND/OR logic. Apple Mail inflates opens — so you can lean on clicks and orders instead, and archive with confidence.
Audit non-subscribed contacts your integrations synced in — billable, never opted in. And set protections: VIP tags and top spenders are never touched, no matter what the rules say.
Archive contacts who haven't opened in 180 days and haven't clicked in 90 days → on a 10,000-contact list, about 2,790 contacts match, protections applied.
The same email in two audiences bills you twice. acadion finds duplicates, archives the redundant copies, and shows you the overlap so you can consolidate with tags.
Years of unsubscribed and cleaned contacts archived in one batch run on day one — usually a full tier drop by itself.
Integrations quietly un-archive contacts and your bill jumps back up. acadion re-audits on schedule so it stays down.
Archiving is Mailchimp-native and undoable. Full log of every archived contact, restore any of them in one click.
A webhook catches every new unsubscribe and archives it immediately — you never pay a full month for someone who left.
A monthly email with the only metric that matters: contacts archived, tier before and after, dollars saved to date.
See exactly who matches before any audit runs. Approve manually, or switch to autopilot once you trust your rules.
Same ghosts, same overbilling. Join the waitlist and we'll tell you when your Klaviyo bill can shrink too.
Estimate based on Mailchimp's public Standard-plan tiers. Your audit shows the exact number for your account.
We connected our Mailchimp account in under five minutes and immediately found thousands of inactive contacts we were still paying for. The first audit dropped us to a lower billing tier and now it runs automatically every month.
I kept postponing list maintenance because it was always a manual project. acadion made it effortless. The preview gave me confidence before archiving anything, and the monthly savings paid for the tool almost immediately.
The rule builder is exactly what we needed. We based decisions on clicks and purchases instead of opens, which made much more sense for our store. We reduced costs without affecting active customers.
Finding duplicate contacts across audiences alone was worth it. We had no idea we were paying twice for so many subscribers. The audit was eye opening and the archiving was completely painless.
I love that everything is reversible. We reviewed the matches, approved the archive, and watched our Mailchimp bill drop the following cycle. It feels like one of those tools that should already exist.
Our Shopify integration kept bringing old contacts back into Mailchimp and our costs kept creeping up. acadion quietly fixes that in the background, so we don't have to think about it anymore.
dead contacts archived to date
returned to customers, and counting
accounts drop at least one tier in the first month
Start with a free audit — see the exact dollar amount before you pay anything.
We've spent years inside email programs and billing dashboards. acadion is the tool we kept wishing existed.
Scaled two SaaS products past their first ten thousand customers. Writes the savings reports you'll actually open.
Over 20 years building e-commerce platforms, email marketing systems and B2B software. Knows exactly what a healthy list looks like — and how much an unhealthy one silently costs.
Yes. Archiving is Mailchimp's own feature — the contact and their history stay intact, they just stop counting toward your bill. acadion keeps a log of every archived contact and you can restore any of them in one click.
Yes — that's the default. The audit only reads: it archives nothing. After that, every connected account has an Auto-archive switch, and with it off each audit stops with the matching contacts listed and waits for you. You approve the ones you want gone, or none of them. Anything already archived goes back just as fast — one contact, or an entire audit, from the archive log.
If an archived contact signs up or buys again, they're automatically unarchived by Mailchimp and acadion won't touch them while they're active. You can also set conservative rules — say, a full year of silence across opens, clicks and orders — and preview every match before an audit.
Apple's privacy features inflate open rates, which is exactly why acadion doesn't rely on opens alone. Combine clicks and purchase history in your rules — signals that can't be faked by a mail client.
Yes — Mailchimp counts the same email once per audience, so a contact in three audiences bills three times. acadion detects cross-audience duplicates, archives the redundant copies, and reports the overlap — the fastest route to the recommended "one audience + tags" setup without losing anyone.
acadion uses Mailchimp's official public API and OAuth, the same way any registered integration connects. Archiving via API is a documented, supported operation.
Never. acadion reads contact activity metadata and archives contacts — it doesn't send email, edit campaigns, or export your list anywhere.
Free audit, two clicks, read-only. Worst case: you learn your list is spotless.
Run a free audit