FlashStart
FlashStart is a global, cloud-based cyber security platform that specializes in DNS filtering with the support of artificial intelligence. It protects against malware and unwanted contents by classifying domains into eighty-five categories, using machine learning with high predictive capability and incorporating government blacklists and warnings for high-risk sites.
It offers global coverage, thanks to Anycast Network, which is among the fastest and most stable in the world. It presents advanced and exclusive features, like geographically based protection.
Easy installation, centralized multi-tenant management, filter customization, and maximum cost-effectiveness make FlashStart the optimal cloud solution for businesses, PAs, schools, households, etc.
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InboxGreen
InboxGreen is a free email deliverability checker that tests SPF, DKIM and DMARC records for any domain instantly, no account required. It shows exactly which DNS records pass, fail, or are missing, and explains what each result means for inbox placement.
The platform includes 28 free DNS tools: DMARC analyzer, DMARC policy tester, SPF generator, SPF tester, DKIM generator, DKIM checker, DKIM selector finder, blacklist checker, email header analyzer, MX lookup, TXT lookup, WHOIS lookup, reverse DNS, DNS propagation checker, SMTP port checker, IP address info, and more.
For teams that need to fix issues, the FixKit provides step-by-step DNS fix instructions for every problem found. The Monitoring plan watches up to 5 domains and sends alerts the moment SPF, DKIM or DMARC breaks. The Agency plan covers up to 30 domains with white-label PDF reports.
Built for developers, marketers, and anyone who sends email and needs it to actually reach the inbox.
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IntoDNS.ai
IntoDNS.ai is a free DNS and email security analysis platform. It runs deterministic checks for DNS, SPF, DKIM, DMARC, DNSSEC, MTA-STS, TLS-RPT, BIMI, SMTP STARTTLS, FCrDNS, blacklist status, and web security headers in one workflow. Public diagnostics are free forever and require no registration or API key for normal use. Results include readable evidence and actionable fix guidance, with AI-assisted explanations where available. Teams can also use report snapshots, scheduled monitoring, a public REST API, CLI, and the official MCP server with 45 tools for AI-agent workflows. IntoDNS.ai is developed and operated by Cobytes B.V. in the Netherlands.
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Cisco Umbrella
Cisco Umbrella's cloud-delivered security enables an immediate improvement in security and compliance posture. That's because DNS is at the heart of every internet connection request. Securing the DNS layer means blocking malicious domains, IP addresses, and cloud applications before a connection is ever established. More than 30,000 organizations depend upon Umbrella DNS to deliver a fast, safe, and reliable internet experience that is simple to deploy and easy to manage. A recent study by GigaOM ranked Cisco #1 in DNS-layer security, and our DNS security contributed to Miercom ranking Cisco #1 in the industry in its laboratory testing of SSE threat efficacy. When you are looking to build upon DNS-layer protection with additional user protection capabilities, including ZTNA, SWG, CASB, DLP, and more, see Cisco Secure Access. Cisco Secure Access features a single client, single manager, and single policy construct protection for multi-function internet access protection and integrated
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