
UptimeRobot
Pingdom
HetrixTools
EasyDMARC
dmarcian
Uptime Kuma
StatusCake
All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.

EasyDMARC
PowerDMARC
UpGuard
SecurityScorecard
White-label security scans and proposals for MSPs.
Which is more popular?
Based on our record, MxToolBox seems to be more popular. It has been mentioned 201 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | mxtoolbox.com | clientposture.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from the United States |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of MxToolBox yet.
Client Posture is a white-label security assessment tool for managed service providers. Enter any client or prospect domain and get a grade with plain-English findings from 17 passive checks: SPF, DKIM, DMARC, MTA-STS, TLS reporting, email platform detection and email filtering; TLS certificate,...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
MxToolBox is highly recommended for IT professionals, network administrators, email server administrators, and anyone responsible for maintaining the health and security of network systems. It is also beneficial for businesses of all sizes that rely on email communication and need to ensure their servers and domains are functioning correctly and not blacklisted.
No analysis of Client Posture yet.
Walkthroughs and reviews on video.
Episode 201 - Tools, Tips and Tricks - MXToolbox.com
No Client Posture videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing MxToolBox and Client Posture.
Client Posture's answer:
It goes from a domain name to a signed proposal in one tool. The scan is passive by design: public DNS, certificate transparency, RDAP and one normal homepage request, with no port scans, logins or probes. You can run it on a prospect before they've agreed to anything, and nobody on their side installs or clicks anything. The findings become a branded Security Brief, and on Pro, a Good / Better / Best proposal built from a 48-service library that the client accepts online.
Client Posture's answer:
Choose it when you need a first look before there's a relationship. Prospect scans need no credentials, agent, link click or install on their side. It also turns findings into work you sell: projected grades, open alerts, proposals accepted online, rescans for QBRs and an insurance questionnaire. And the prices are public. Choose a different tool when you need internal network scanning, patching or a penetration test. Client Posture isn't any of those.
Client Posture's answer:
Managed service providers. That includes new MSPs and established MSPs adding a security line, who want a repeatable way to open security conversations with prospects and existing clients, and to win the fix and the monthly retainer.
Client Posture's answer:
Client Posture is a Next.js web app hosted on Vercel, with Supabase (Postgres with row-level security, authentication and storage), Stripe for billing and Resend for transactional email. Scans read public signals only: DNS-over-HTTPS, certificate transparency logs, RDAP registration data, TLS handshake metadata and one homepage request. AI assistants connect through Client Posture's MCP server using per-person API keys.
Share your experience with using MxToolBox and Client Posture. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Did you do blacklist (and other) checks with https://mxtoolbox.com/ ? - Source: Hacker News / 8 days ago
Made the switch to self-hosted https://mailu.io (on k8s) 2 years ago when Gandi announced the deprecation of their free plan. Happy after IP was off most blocklists, but setup was kinda rough - https://mxtoolbox.com is your friend. - Source: Hacker News / over 1 year ago
I used these tools in the past: https://mxtoolbox.com/ https://www.mail-tester.com/. - Source: Hacker News / over 2 years ago
Tracking Client Posture since Oct 2026.
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