AuthSMTP Alternatives

Email Validation & Email Verification reduces bounce rates up to 98%. Rapidly verifying email addresses has never been easier, just drag drop and deliver!

bounce.io is turning bounced emails into a new user experience, revenue channel and threat intelligence.

CritSend is a SMTP relay for developers.

Marketing & transactional email delivery platform

SendForensics offers email analysis and deliverability solutions.

Deliver your app and website emails on time and to the inbox. Trusted to send 25% of the world's non-spam email. Email delivery for companies big and small.

Inbox placement solutions from Return Path helps improve email deliverability and increases email marketing ROI.

250ok offers a SaaS-based platform to monitor and measure the deliverability of email networks.

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

Inboxman is an email delivery tool to maximize the deliverability.

Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.

A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

Goolara is an email marketing software provider that specializes in advanced email marketing systems made easy-to-use.