Partner program · wholesale + white-label

Sell verified B2B emails as your own product.

Attach our engine behind your API. Or white-label the whole stack at verify.yourbrand.com — custom domain, your palette, your logo. Wholesale rates from $0.005 to $0.015 per verified email undercut every published API rack in the category while keeping your margin healthy.

Send a partner requestSee the accuracy benchmark

Wholesale pricing.

One number per tier. No credit trickery. Volume tiers apply automatically as monthly verify count crosses each threshold.

Starter

< 10K verifies / mo

$0.015

per verified email

$500 / mo minimum

Retail-margin-preserving. Room for you to price above and still undercut published rack rates in the category.

Growth

10K – 50K verifies / mo

$0.010

per verified email

Volume commit contract

Priced against your unit economics, not published retail. Ships with monthly meter reconciliation.

Scale

50K – 250K verifies / mo

$0.007

per verified email

Volume commit + 90-day notice

Enterprise rate — priced against your own SMTP COGS, not retail.

Enterprise

250K+ / mo

Custom

contact for exact rate

Annual contract

Anchor-tenant pricing. Talk to us about dedicated capacity + region.

Pricing is per verified email — status = 'found'. Catch-all, protected, and not-found responses are free. This is real charge-on-success — no refund math, no invoice surprises.

White-label add-on.

The engine, your brand — end-to-end.

  • Custom subdomain (verify.yourbrand.com) with real TLS + our engine behind it
  • Dashboard skin: your logo, your palette, your product name
  • Docs skin at docs.yourbrand.com — same OpenAPI, your branding
  • Email templates, auto-replies, error messages all say your product name
  • Zero mention of Coalstoke to your end customer

Add-on

+ $0.002 / verified

or $500 / mo flat

On top of any wholesale tier.

Who this is for.

Four shapes of partnership we've already priced. If yours doesn't match, describe it in the form.

Scraper attaches verifier

Prospecting tool, browser extension, list-builder

Every scraped lead is worthless without a verified email. Attach us as the last mile.

Integration

One POST to /v1/verify or bulk to /v1/ingest — JSON in, JSON out.

Typical volume

10K – 100K / mo per customer

Existing finder needs coverage lift

Category incumbent looking to close the miss-segment gap

Backstop your miss-segment with a distributed SMTP layer + BYOK waterfall — you keep the retail brand, we deepen the pipe.

Integration

HMAC-signed webhook — matches your existing API contract shape.

Typical volume

50K – 500K / mo

CRM / RevOps platform

Sales engagement platform, RevOps stack, CRM

Your customers want emails verified inside your tool, not exported to a third party and re-imported.

Integration

Webhook fires on contact create; verified email + reason code returned live.

Typical volume

25K – 250K / mo

Data broker white-label

B2B lead-gen agency reselling verified data by industry

Wholesale procurement on the verify layer leaves you full retail-margin control, without owning the infra.

Integration

White-label full stack — your brand, our engine.

Typical volume

100K+ / mo

The integration surface.

Every endpoint you'd hit is already in production and documented. Nothing here is aspirational.

EndpointPurposeLatency
POST /v1/verifySingle email → status + reason code + verified flag~400ms p50
POST /v1/findfirst + last + domain → verified email or reason~600ms p50
POST /v1/ingestCSV upload → async batch → HMAC callback with results10K async job, HMAC callback
GET /v1/bulk/:idPoll bulk job status + retrieve verified resultsinstant
POST /callback/…HMAC-signed webhook you host; we POST results as jobs completeas-jobs-complete

HMAC-signed webhooks. Full OpenAPI at /docs.

Send a partner request.

Every field feeds real deal-shaping. The more concrete you are on volume, integration surface, and target price, the faster you get a real quote back.

What kind of deal are you exploring?

No auto-drip. No sales sequence. One reply from me, sometimes same-day.

Straight answers.

Who's behind this?

Solo founder — Dalton Redden, US-based. Every partner reply comes from me directly. No BDR sequence.

What if we outgrow the engine?

Distributed SMTP verification fleet with capacity headroom. We add nodes on 48h notice. Enterprise tier includes dedicated fleet + region.

Is there a lock-in?

Starter and Growth: no contract, cancel any time. Scale/Enterprise: 90-day notice because we're provisioning fleet for you. Full data export on cancel.

Can we see accuracy numbers first?

Yes — the segmented benchmark at /benchmark refreshes live from D1 across 3,400 real leads. Full formulas published. Reproducible on your own list with a signup.

CoalstokeIndependent · Verification infrastructure
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