Majestic is a backlink analysis toolset for SEO, established in 2004. It maps the web to provide Link Intelligence data, including metrics such as Trust Flow, Citation Flow and Topical Trust Flow. Its tools include Site Explorer, Summary, Backlink History and Clique Hunter, along with an API and browser plugins.
Focsec is an API for detecting VPNs, proxies, TOR and bot traffic. It provides IP check data for protecting applications, identifying suspicious logins, detecting fraudulent signups and stopping scrapers and crawlers. Plans are billed monthly, and a free 14 day trial is offered.
IntoDNS.AI is a DNS and mail server checker that reports on SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, FCrDNS and blacklists. It also offers a free public REST API for DNS and email security scans, with JSON and Markdown reports. The service states it is not affiliated with intodns.com.
isMalicious checks IPs, domains, URLs, emails, phones and crypto wallets against indexed threat indicators. It returns verdicts with contributing sources, categories and a risk score from 0 to 100 in a JSON response. Data is available through a REST API, STIX/TAXII feeds and an MCP integration for AI assistants. A free plan allows 50 lookups per month.
Website.informer offers a free aggregated report on any domain, including WHOIS, visitors, IP and DNS details, competitors, and owners. It provides website statistics such as daily visitors, safety status, and global rank, plus competitor and similar-site research. It also offers IP and DNS lookup, WHOIS records, a browser extension for website analysis and security checks, and email-to-domain matching from WHOIS data.
SubDomainRadar is a service that is paused. It is no longer accepting scans, API requests, or new signups while the platform changes hands. Existing account data is retained, and recurring billing for active subscriptions has been stopped. The same team offers LeakRadar, a data breach monitoring service.
Semrush is a platform for growing and measuring brand visibility across AI search, SEO, PPC, and social. Its toolkits cover keyword research, competitor analysis, backlink analysis, technical site audits, content creation, local search visibility, and tracking of brand appearances in AI-generated answers. A free trial is offered.
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Focsec is an API for detecting VPNs, proxies, TOR and bot traffic. It provides IP check data for protecting applications, identifying suspicious logins, detecting fraudulent signups and stopping scrapers and crawlers. Plans are billed monthly, and a free 14 day trial is offered.
IntoDNS.AI is a DNS and mail server checker that reports on SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, FCrDNS and blacklists. It also offers a free public REST API for DNS and email security scans, with JSON and Markdown reports. The service states it is not affiliated with intodns.com.
isMalicious checks IPs, domains, URLs, emails, phones and crypto wallets against indexed threat indicators. It returns verdicts with contributing sources, categories and a risk score from 0 to 100 in a JSON response. Data is available through a REST API, STIX/TAXII feeds and an MCP integration for AI assistants. A free plan allows 50 lookups per month.
Website.informer offers a free aggregated report on any domain, including WHOIS, visitors, IP and DNS details, competitors, and owners. It provides website statistics such as daily visitors, safety status, and global rank, plus competitor and similar-site research. It also offers IP and DNS lookup, WHOIS records, a browser extension for website analysis and security checks, and email-to-domain matching from WHOIS data.
SubDomainRadar is a service that is paused. It is no longer accepting scans, API requests, or new signups while the platform changes hands. Existing account data is retained, and recurring billing for active subscriptions has been stopped. The same team offers LeakRadar, a data breach monitoring service.
Semrush is a platform for growing and measuring brand visibility across AI search, SEO, PPC, and social. Its toolkits cover keyword research, competitor analysis, backlink analysis, technical site audits, content creation, local search visibility, and tracking of brand appearances in AI-generated answers. A free trial is offered.
