KnownVisitors vs Opensend
Both turn anonymous visitors into contacts. Only one gives you more than an email.
An email isn't a contact. A full record is.
Add the pixel
Live the same day.
Reveal visitor identity
Person-level, US traffic.
Get the contacts
Name, email, phone. Webhook or CSV.
Sell to traffic you paid for
Email, call, retarget. By name.
What lands in your hands.
A contact you can call, on any US traffic.
- Full name
- Personal email
- Phone number, DNC-flagged
- Mailing address
- Household and property attributes
- In-market signals, updated daily
- The consumer identity, even on a B2B site
Opensend
An email, from a co-op network.
- Consumer email
- Basic identifier info
- Cross-device matchReconnect product
- Meta CAPI eventsIgnite product
Opensend deliverables per opensend.com, July 2026. Core output is a consumer email and basic identifier; no phone number, business email, or LinkedIn/company data is offered.
800+ attributes to choose from.
The person, plus the depth to segment before you spend — household, property, financial, demographic.
Opensend hands you an email. KnownVisitors hands you the person, with 800+ attributes to segment on.
Side by side
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|
Opensend | |
|---|---|---|
| Built for | Any site with US traffic | DTC ecommerce |
| What you receive | Name, personal email, phone, address | A consumer email + basic identifier |
| Phone number | On every matched record | Not a listed field |
| Coverage source | Your own visitors, first-party | Whoever is in their co-op network |
| Method | First-party pixel, deterministic | Co-op identity graph + fingerprint |
Opensend fields and method per opensend.com, July 2026.
Your visitors,
not their network.
First-party identity, anchored to your own traffic.
A co-op only reveals people already in its network — not the visitors actually on your site.*
First-party, anchored to your own visitor and your domain.
Opensend matches your traffic against a shared co-op network, so coverage is capped by who else is in it, not by who visits you. KnownVisitors identifies your own visitors, first-party and deterministic, and hands you the full contact, phone included.
*Per opensend.com, July 2026: Opensend is an opt-in publisher co-op identity network; its core output is a consumer email, with no phone number listed as a deliverable.
If you just want an email to retarget a DTC shopper, Opensend can do that. If you want the full consumer contact, phone included, on any US traffic, book the demo.
Questions, answered
For anyone who wants the full consumer contact, phone included, instead of just an email, yes.
No. Opensend's core output is a consumer email and a basic identifier; a phone number isn't listed as a deliverable. KnownVisitors includes a phone number, flagged against the Do Not Call registry.
Opensend matches your visitors against a shared co-op network, so it can only reveal people already in it. KnownVisitors is first-party and deterministic, anchored to your own visitor's relationship with your domain, so coverage isn't capped by someone else's membership.
Yes. Opensend is built for DTC ecommerce. KnownVisitors resolves the consumer on any US traffic: insurance, mortgage, solar, home services, and DTC alike.
Book a demo. See who’s really there.
See who’s in your traffic. Tell us your site and rough monthly visitors, and we'll get back within one business day.