Cold email tools
Tools we built for our own work. No email gate and no signup. Where a calculator needs a starting assumption, it uses a number we measured rather than one we liked the look of; where a checker reports on your DNS, a lookup that failed is reported as a failure rather than dressed up as a clean result.
Calculators
Cost per meeting
What a sales meeting from cold outbound actually costs once the hours are priced in, and how that compares to buying meetings instead.
Send volume, measured reply rates, four cost lines, one comparison.
Cold email ROI
Meetings through to closed revenue, gross profit and payback, with the break-even close rate stated plainly rather than buried.
Return on gross profit, cost per closed deal, cash funded before the first win.
Spam word checker
Paste a cold email and see the claims a reader cannot check, the language that marks it as bulk, and the defects that ship verbatim.
Runs entirely in your browser. Nothing is uploaded, stored or logged.
Domain health
Four DNS checkers for the records that decide whether mail from your domain is trusted. These query DNS from our server rather than running in your browser, and each one distinguishes a lookup that came back negative from a lookup that never came back at all.
DMARC checker
Reads the DMARC record at _dmarc on your domain and explains every tag in it: what the policy actually does to failing mail, whether subdomains are covered, and whether anyone is receiving the reports.
One TXT lookup, every tag translated, and the four conditions that make a record useless.
SPF checker
Parses your SPF record and counts the DNS lookups it costs, following every include: and redirect= to the bottom, because the ten-lookup limit is what silently breaks SPF for multi-tool sending stacks.
Recursive lookup counting against the RFC 7208 limit of ten, plus +all and ptr detection.
DKIM checker
Looks up a DKIM public key by selector, or tries the selectors the major sending platforms publish by default, and reports the key type, the key length and whether the key has been revoked.
Selector lookup or fourteen common selectors tried at once, with exact key sizes.
Blacklist checker
Resolves the addresses behind your domain and its mail servers, then queries them against public DNS blocklists, reporting a lookup that failed as a failure rather than as a clean result.
Domain and MX hosts resolved to IPs, checked against blocklists verified live on every request.
The defaults come from our cold email benchmark report, which measures reply and bounce rates across every campaign we have run rather than repeating figures from other people's blog posts.