MailerLite vs Slash: most-reported complaints compared
Most-reported issues at MailerLite and Slash, according to reviewers on Trustpilot — classified by our automated reader and backed by verbatim quotes from distinct reviews. This is a side-by-side of what reviewers report, not a score, rating or recommendation for either company.
MailerLite
TrustScore 4.1 · 3,315 reviews on Trustpilot.
297 reviews analysed, 2026-04-20 to 2026-09-24.
Complaint rate (recent window): 30%
47% of negative reviews get a company reply.
“Without any warning, MailerLite terminated my account citing anti-spam violations.”
Slash
TrustScore 4.4 · 426 reviews on Trustpilot.
166 reviews analysed, 2025-11-04 to 2026-09-01.
Complaint rate (recent window): 13%
50% of negative reviews get a company reply.
“customer support will ghost you”
Reported on both
Issues with an evidenced category (at least two verbatim quotes) on both sides.
| Issue | MailerLite | Slash |
|---|---|---|
| Account/app problems | 58% | 48% |
| Support unhelpful | 28% | 38% |
| Support unreachable | 19% | 43% |
Method: reviews are classified into a fixed complaint taxonomy by an automated reader; every category shown is backed by at least two verbatim quotes from distinct reviews. Figures are census classifications, not official statistics, and reflect what reviewers reported — not findings of wrongdoing by either company. Not affiliated with, endorsed by, or sponsored by Trustpilot A/S, MailerLite or Slash.