Why BigMailer's Flat-Fee Brand Stack Changes Agency Email Margins

BigMailer prices per account, not per client brand, so an agency on Agency Pro at $12/mo per the published tier ladder can carry dozens of client brands under one subscription instead of stacking separate platform seats. That flips email from a per-client cost line into a fixed overhead the agency absorbs and resells at retainer rates. The catch is that sending runs through the client's own Amazon SES connection, so deliverability work stays in your delivery scope.