See what every company runs. Then act on it.
RunsWith reads public DNS records (NS, MX, CNAME, TXT, A) to identify which infrastructure providers a company uses. 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
No vendor switches detected yet, of 48,521 tracked
Detected when a domain's NS, MX, A, or CNAME records change to a different provider. Filter by time window.
Nothing in the last 7 days. Widen the window on the full list.
For DMARC and email-security vendors
7,141 of 48,521 tracked companies have weak email auth (15%)
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
DMARC on 8,894 of 48,521 tracked companies (18%)
9,924 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