Mailster
Depends
Confidence: Medium
Buy it if you run a WordPress site and want newsletter sending without monthly SaaS fees.
New check
Comparison
Mailster vs Mailchimp
Mailster and Mailchimp both land on Depends.
Mailchimp
Depends
Confidence: High
Buy if you're a small business or startup testing email marketing on the free tier.
| Compare | Mailster | Mailchimp |
|---|---|---|
| Verdict | Depends | Depends |
| Best for | Small WordPress sites | Small businesses starting email marketing free |
| Who it's not for | High-volume senders needing managed deliverability | Large or fast-growing lists . pricing punishes growth |
| Privacy | Several reported vulnerabilities (reflected XSS, local file inclusion) around v4.0.6; keep the plugin updated.⁹ | Three breaches in 12 months (2022-23); brand actively abused in phishing. |
| Support quality | Users report weeks-long support waits | Insufficient direct evidence in reviewed sources |
| Public sentiment | Users praise the value for the price and ease of use, but some report support delays and weigh it against standalone email services. | Long-time users increasingly complain about complexity, pricing, and post-Intuit decline, while professional reviewers still rate the core email and AI tools highly.13 |
| Biggest gotcha | Ownership changed hands; verify update cadence before committing.⁸ | Premium tier starts at $350/month; costs jump steeply between tiers16 |
Pick Mailster when
- Small WordPress sites
- Budget-conscious newsletter senders
- Bloggers wanting in-dashboard sending
- Buyers who hate subscriptions
When Mailster is not a fit
- High-volume senders needing managed deliverability
- Non-WordPress sites
- Teams wanting vendor-run infrastructure and SLAs
- Anyone unwilling to maintain plugin updates
Pick Mailchimp when
- Small businesses starting email marketing free
- Teams wanting AI-assisted campaigns
- Senders who want a polished, mature platform
When Mailchimp is not a fit
- Large or fast-growing lists . pricing punishes growth
- Anyone wanting simple, predictable billing
- Advanced senders needing deep features (users call it limited)
- Teams handling sensitive recipient data
Sources
- Mailster official sitemailster.coofficial
- Mailster pricing pagemailster.coofficial
- Mailster templates (400+)mailster.coofficial
- WP Mayor Mailster reviewwpmayor.comreview
- Mailster vs Mailchimp cost comparisoninboxreads.coreview
- Reddit: Email marketing recommendationsreddit.comreview
- WordPress.org support: Awful performance and supportwordpress.orgreview
news
- Patchstack: Mailster 4.0.6 reflected XSSpatchstack.comsecurity
- Acunetix: Mailster 4.0.6 local file inclusionacunetix.comsecurity
- Alternatives.co Mailster pricingalternatives.coreview
- Blogvault: MailPoet vs Mailsterblogvault.netreview
review
- Mailchimp Pricing 2026: Watch Out for These Extra Costsemailtooltester.comreview
review
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