Chatrace

Chatrace does the keyword-to-DM trick that Manychat made standard, at a flat price per account rather than per contact tier. The white label plan is the real difference: an agency can put its own name and domain on the whole thing and resell it. Documentation assumes you have built a flow before.

Pro is $39 a month for up to 3,000 contacts on one account, with extra team members at $10 each and the price rising as contacts do. You can create unlimited accounts under one login, and each is billed separately. The white label plan is $499 a month and includes 50 client accounts, 500,000 contacts and your own branding throughout. A free trial is offered with no card, though the page does not say how long it runs.

An agency running comment automation for several clients, where the white label tier pays for itself on the second account. A single creator will find Manychat better documented and better supported.