MailerSend
Worth it
Confidence: Medium
Buy if you're a developer or small team sending app or WordPress transactional email on a budget.
New check
Comparison
MailerSend vs CheckThat.ai
MailerSend lands on Worth it, and CheckThat.ai lands on Depends.
CheckThat.ai
Depends
Confidence: Medium
Worth trying if you're a B2B marketer wanting free visibility into how ChatGPT and Claude describe your brand.
| Compare | ||
|---|---|---|
| Verdict | Worth it | Depends |
| Best for | Developers adding transactional email APIs | B2B SaaS marketing teams |
| Who it's not for | Marketing newsletter senders | Enterprises requiring security documentation |
| Privacy | Core platform looks solid; the official WordPress SMTP plugin had a fixed CSRF vulnerability.⁹ | No known public vulnerabilities found in the sources reviewed. |
| Support quality | 24/7 support promised; approval rejections handled poorly | No user evidence available |
| Public sentiment | Reviewers praise easy setup and low prices, but Reddit users complain about opaque sign-up rejections and some churn to simpler options.¹ | Independent user reviews are essentially absent . CheckThat has zero ratings on its G2 seller page. |
| Biggest gotcha | WordPress plugin users must update past 1.0.8 to patch CSRF⁹ | Paid pricing not published on reviewed pages; limits above the free tier are unclear. |
Pick MailerSend when
- Developers adding transactional email APIs
- WordPress sites needing SMTP relay
- Budget-conscious SaaS teams
- Startups starting on the free tier
When MailerSend is not a fit
- Marketing newsletter senders
- Buyers who can't tolerate opaque onboarding
- Self-hosters avoiding third-party senders
- Devs prioritizing developer-experience polish over price
Pick CheckThat.ai when
- B2B SaaS marketing teams
- Brands chasing AI-search mentions
- Startups wanting free visibility tracking
- AEO and PR agencies
When CheckThat.ai is not a fit
- Enterprises requiring security documentation
- Buyers who demand reviewed, proven vendors
- Teams needing traditional SEO rank tracking
- Anyone expecting published pricing
Sources
- MailerSend Review 2026: Is It Worth It for WordPress?wpmailsmtp.comreview
- MailerSend Review 2026: I Tested Its API, SMTP & Moreemailvendorselection.comreview
review
review
- MailerSend, Inc. Reviews - Trustpilottrustpilot.comreview
- MailerSend pricing - MailerLitemailerlite.comofficial
- Plans, features and limits - MailerSend Helpmailersend.comofficial
- MailerSend Product security pagemailersend.comofficial
- CVE-2026-13156 - CVE Recordcve.orgsecurity
security
review
- I recently switched over to MailerSend - Hacker Newsnews.ycombinator.comreview
- Email sender services - Reddit r/webdevreddit.comreview
official