MXToolbox is the go-to for email and DNS lookups. AcuityScan runs those same checks and seven more categories in one scan, with a unified score and a copy-paste fix for every finding.
MXToolbox has been the reference tool for email and DNS diagnostics for over two decades. Its blacklist monitoring and SuperTool lookups are excellent, and if email deliverability is the only thing you care about, it does that job well. AcuityScan is built for the broader question: is this whole website healthy, not just its mail records.
Email, DNS, and blacklist lookups.
| AcuityScan | MXToolbox | |
|---|---|---|
| Primary focus | Full website audit | Email, DNS, blacklists |
| Categories covered | 8 | 3 |
| Email auth (SPF/DKIM/DMARC) | Yes | Yes |
| Blacklist checks | 80+ live RBLs | Yes (extensive) |
| SSL / TLS deep analysis | Yes | Basic |
| Performance / Core Web Vitals | Yes | No |
| Accessibility (WCAG) | Yes (axe-core) | No |
| Unified 0-100 health score | Yes | Pass / fail per check |
| Monitoring & alerts | Included in Pro | From $129/mo |
| Starting paid tier | $29/mo | $129/mo |
| Plain-English fix for every issue | Yes | No |
| Shareable report link | Yes | No |
| PDF export | Yes (Pro) | No |
| Native Claude / MCP integration | Yes | No |
Comparison based on MXToolbox's publicly listed features and pricing as of 2026. Competitor capabilities change, so if anything here is outdated, let us know.
We would rather you pick the right tool than the wrong one. MXToolbox is the better fit when:
Run a full in 60 seconds. 350+ checks, no signup.