listmonkManage subscriber lists and send newsletter campaigns from your server.
Free self-hosted software · hosting and SMTP delivery cost extra.
Customer messaging & notification triggers
Free alternatives to Customer.io
Find a free app for the parts of Customer.io you actually use.
Compare the free allowance and limitations on each app’s page. These are workflow alternatives, rather than identical copies.
Free options
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NovuCoordinate email, SMS, push and in-app notifications from one application workflow.
100% free open-source (MIT). Unlimited notifications and workflows on your own servers.