Know when a company switches infrastructure.
RunsWith reads public DNS and flags every change - a new CDN, an email migration, a security downgrade - the moment a scan catches it. Each detection is Ed25519-signed and independently verifiable. No agents, no crawlers. Just DNS.
Sell smarter
"Who switched DNS or email providers?"
When a domain's NS or MX records change, we detect the switch and surface it. Filter by category, export as CSV.
Secure faster
"Who has weak DMARC?"
We read each domain's DMARC, SPF, and CAA records and score them 0 to 10. Filter by sector and export.
Know the market
"Who uses Slack, Stripe, Okta?"
Many SaaS tools ask customers to add a DNS TXT record for verification. We detect those records across every domain we track.
For CDN and DNS challengers
15 companies switched vendors in the last 7 days, of 48,562 tracked
Detected when a domain's NS, MX, A, or CNAME records change to a different provider. Filter by time window.
For DMARC and email-security vendors
46,465 of 48,562 tracked companies have weak email auth (96%)
Scored by reading each domain's DMARC, SPF, and CAA DNS records. Score 3 or below means weak or missing email authentication.
For SaaS vendors and competitive intel
Google on 24,701 of 48,562 tracked companies (51%)
32,273 companies expose third-party SaaS via DNS verification. Top five below. Click a tool to see every company using it.
Recent vendor switches
Top providers
Recently scanned