Comparison

Mailpro vs Mailrelay

Mailpro lands on Depends, and Mailrelay lands on Worth it.

Mailpro

Depends

Confidence: Medium

Solid pick for European SMBs wanting Swiss-hosted, GDPR-first email and SMS marketing with a free start.

Worth it

Confidence: Medium

Buy if you're a small business, NGO, or newsletter sender wanting free bulk email under 20,000 contacts.

Mailpro versus Mailrelay
Compare	Mailpro	Mailrelay
Verdict	Depends	Worth it
Best for	Privacy-sensitive European SMBs	Small businesses sending newsletters
Who it's not for	US businesses wanting US data residency	High-volume senders past 20,000 contacts
Privacy	Swiss-hosted, GDPR-compliant, offers 2FA; no verified product vulnerabilities found in reviewed sources.¹⁰	One known CVE on its WordPress plugin (CSRF, 2023); responsible disclosure policy exists, but no dedicated security page found.
Support quality	Advertises free customer service; independent confirmation is thin.	No support evidence found
Public sentiment	First-party review pages praise its support, but independent third-party feedback is sparse and fragmented across review sites.^⁶	Reviewers like the price and free tier, but some Reddit users say rivals like Brevo outperform it.¹⁴
Biggest gotcha	Credit-based system: campaigns and automations drain credits; automatic recharge can silently bill your card.^⁵	Free plan caps at 20,000 contacts . list growth forces paid tiers¹¹

High-volume senders past 20,000 contacts
Developers needing transactional SMTP/API scale . SendGrid-class tools fit better
Security-sensitive enterprises wanting public security documentation
Guess: shops needing deep ecommerce/CRM integrations