CampaignKit Self-Hosted runs the full validation engine, API and web app inside your network. Unlimited validations for one flat yearly price, and your contact lists stay on your own infrastructure.
Uploads, results and API calls are processed and stored on your own infrastructure. No validation vendor ever receives your lists, so there is none to add to your DPA or sub-processor list. Mailbox checks only contact the recipient’s own mail server, as any email verification does.
One yearly licence, no credits and no per-email fees. Validate a million addresses a month for the same price as ten thousand.
Mailbox checks go out from your own static IP and hostname, so you control the sending reputation and throughput.
The REST API, bulk jobs, webhooks, catch-all checks and the MCP endpoint all work the same. Point the n8n node or your code at your own URL.
The licence key is checked offline and the app never reports back to us. Disposable-domain lists ship with each release, so they need no outside download.
Developed and supported from Europe, with support in English and German.
Prices in US dollars, billed yearly. Founding customers get 30% off the first year in exchange for feedback.
For one team running one production install.
$299/month
$3,588 billed yearly · founding price $2,512 for year one
For companies with several environments or regions.
$599/month
$7,188 billed yearly · founding price $5,032 for year one
Unlimited instances, white-label builds, embedding in your own product, a support SLA and a named contact.
Mailbox verification talks to other mail servers over SMTP, so the network matters more than the hardware.
Prefer not to run servers? See cloud pricing.