Cost / License
- Free
- Open Source (AGPL-3.0)
Platforms
- Online
Germany
EU




Sites and apps similar to MxToolBox include Domain Digger, which is free and open source. Other options are Pingdom, HetrixTools, MailAegis and Klaxel. You're spoiled for choice with Uptime Monitor Services like MxToolBox: we list more than 50 alternatives for Windows, Linux, self-hosting, Chrome OS and Mac.




Tracks uptime, downtime, and page speed with synthetic and real user monitoring, simulates critical flows, analyzes visitor data by location, device, and browser, sends instant alerts, and provides analytics and reporting to troubleshoot and optimize sites.




HetrixTools offers minute-by-minute global uptime monitoring with 15 free monitors, blacklist alerts for IPs and domains, and server resource tracking. Features a user-friendly design, public uptime pages, white label reports, and continuous updates for enhanced functionality.



![(dark mode) Server Resource Monitoring [1]](https://img.alternativeto.net/s/309x197/jpeg/hetrixtools_672860_full.png)
MailAegis is an email authentication monitoring service for domain owners, IT teams, and email senders. It checks SPF, DKIM, DMARC, and MX records against DNS best practices, scores the overall configuration, and surfaces specific misconfigurations with actionable...




Klaxel is a hosted domain-health scorecard built for managed service providers who run domains on behalf of many clients. It watches the signals that silently break a client relationship — email authentication (SPF, DKIM, DMARC), blacklist and reputation status, SSL/TLS...





API suite for website intelligence: tech stack detection (Wappalyzer fingerprinting + DNS + TLS + HTTP headers), SSL/TLS certificate inspection, DNS intelligence with provider enrichment, security header analysis with letter grading, and technology change monitoring.

Monitor your website, server, API, application, service and get notified if your resources have some problems with availability. Upzilla notifies you in Slack, Telegram, Messenger, or by email. Works also as a public status page with subscriptions.




Open-source observability platform providing uptime monitoring, alerts, incident management, status pages for transparency, log and error tracking, performance and security monitoring, automated API testing, on-call rotation, and integrated root-cause analysis for operations teams.





