6 min read
Free domain intelligence API: what you can get without paying
What a free domain intelligence API should return, exactly what pingutil gives for free (fields and rate limits), what it doesn't do, and how free tiers compare.
Company enrichment
Turning an email domain into a company profile, and keeping CRM data honest.
- 8 min read
A B2B lead scoring model built from email and company data
A transparent points-based lead scoring model from email category, company size, industry and email signals, with starting weights and a calibration method.
- 8 min read
Filtering fake leads from website forms with a webhook
Put a small webhook between Tally or Typeform and your CRM: verify the signature, classify the submitter's email, and route real leads to the CRM and junk to review.
- 7 min read
LLM lead qualification: where a lookup API beats the model
Which lead qualification steps an LLM is good at, which ones a deterministic lookup should own, and a pipeline that puts each in the right place.
- 6 min read
Spotting multiple signups from the same company
Detect teammates who sign up separately: group signups by registrable domain, skip webmail and schools, then send a team invite or a sales alert.
- 6 min read
eTLD+1 explained: why mail.stripe.com is stripe.com
What eTLD+1 means, how the Public Suffix List defines it, why splitting on dots breaks on bbc.co.uk, and how to compute it in JavaScript, Python and Go.
- 7 min read
Caching domain lookups: keys, TTLs and when to refresh
How to cache email and domain lookup results: what to key on, which fields can share a cache entry, TTLs per data type, stale-on-error, and when to force a refresh.
- 7 min read
How accurate is LLM-based company enrichment?
Where AI company enrichment is reliable, where it fails (invented funding, stale HQs, the wrong company), and the guardrails that make it safe to use.
- 6 min read
Free domain lookup tools: WHOIS, DNS, classification and company data
Free domain lookup tools grouped by the question they answer: registration (RDAP, WHOIS), DNS, domain type and company data, with commands you can run now.
- 6 min read
CRM data hygiene: cleaning contacts by email domain
Clean up a CRM by email domain: normalize company domains, merge duplicate accounts, separate personal and disposable contacts, and keep it clean.
- 8 min read
Routing inbound leads by company size and industry
Build lead routing rules on enriched company size, industry and country: segment buckets, an ordered rule table, confidence gates and a triage queue for unknowns.
- 6 min read
Enriching inbound leads from nothing but an email domain
Design a lead enrichment step that starts from a work email: gate by domain type, enrich async, record provenance, never overwrite human input.
- 7 min read
Clearbit alternatives after the HubSpot acquisition
What changed at Clearbit after HubSpot bought it, which features are gone, and a replacement for each one: logos, enrichment, form shortening and signup screening.
- 7 min read
Free company enrichment APIs: what you actually get
Free company enrichment comes in three forms: capped tiers of paid databases, LLM-generated profiles, and DIY scraping. What each returns, and how to test them.
- 6 min read
What is domain intelligence? A practical definition
Domain intelligence is everything you can learn about a domain name: what kind of domain it is, whether it works, who registered it and which company is behind it.