HubSpot, Marketo, Klaviyo, Mailchimp and ActiveCampaign rent the list and the sequence. Mautic is GPL-3.0 and is the closer replacement for a campaign tool. Listmonk is AGPL-3.0 and is a mailing-list sender, not a full marketing suite. We name that difference before anyone picks one.
What do you actually get?
Mautic gives forms, segments, campaigns and a mailer you host. Listmonk gives lists, campaigns and a clean send path. Neither ships HubSpot's CRM, ads network, or the app marketplace. If those are the reason for the subscription, replacing the mailer does not replace the suite.
What still has to be operated?
Deliverability. A self-hosted mailer on a cold IP lands in spam. That is an operations problem, not a licence problem, and it is why some clients keep a sender while owning the list and the campaign logic.
When should marketing stay rented?
When the team will not watch bounces, authentication and complaints. A list you cannot deliver to is not an asset. We keep the sender rented in that case and still pull the contact data back to a system the client holds.
What do we hand over?
We select the system, deploy it on infrastructure you control, connect it to the tools you keep, and write the runbook so your own team can operate it. Support after handover is optional. The rest of the map is in software you can stop renting; the engagement behind it is open-source business systems.
Name one process that still needs a person. We will tell you what a one-time build takes.
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