Elastic Email

Elastic Email provides a white-label platform designed specifically for agencies and resellers who need to deliver email marketing under their own brand. The interface can be fully customized with your agency's logo, colors, and domain, giving clients the impression they're using your proprietary tool. Unlimited subaccounts mean each client gets their own login environment with isolated contact lists and campaigns.

This fits agencies managing dozens of clients who want to offer email marketing as a standalone or bundled service. The white-label approach helps build client loyalty and margins, while the flat-rate pricing structure makes it easier to predict costs per account. It's particularly strong for mid-market agencies that need to scale quickly without investing in custom infrastructure.