predictable tiers · no seats · transparent overages

Simple pricing for the API

Same API on every tier—only limits differ. Zero caps monthly verification units (all logged usage). Paid tiers include billable volume each period, then metered overage.

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Zero

€0/mo

no card required

500 verification units per UTC calendar month

What you get

  • Up to 2 active verify API keys
  • 10 requests/min per key (sliding 60s window)
  • Single, batch, stream, and async webhooks
  • Five verification layers + tiered confidence scores
  • OpenAPI 3.1 spec & MCP server access
  • EU-hosted (Frankfurt) & GDPR friendly
  • Hard-capped at 500 verification units/mo — no surprise bills
$ get free api key
popular

Builder

€9/mo

billed via Stripe · cancel anytime

5,000 billable verifications included per month · overage €0.002 per call

Everything in Zero, plus

  • Up to 5 active verify API keys
  • Metered overage after included volume — no hard stop
  • 100 requests/min per key (sliding 60s window)
  • Usage & request logs — 90 days of history (Zero: 7 days, UTC)
  • Webhook delivery logs ~30 days vs Zero ~24h; one-click retry for failed deliveries
  • Priority support
$ subscribe in dashboard
volume

Scale

€49/mo

billed via Stripe · cancel anytime

100,000 billable verifications included per month · overage €0.0012 per call

Everything in Builder, plus

  • Up to 10 active verify API keys
  • Discounted overage: €0.0012/call
  • 1,000 requests/min per key (sliding 60s window)
  • Heavy /batch and NDJSON streams
$ subscribe in dashboard
high volume

Custom / Enterprise

Planning 1M+ verifications per month? We can discuss volume pricing, integration, and account setup—no self-serve checkout required.

$ contact us
// compare at a glance
Zero Builder Scale
Monthly price €0 €9 €49
Included per month 500 units (UTC) 5,000 billable 100,000 billable
Rate limit (per API key) 10 / min 100 / min 1,000 / min
Active verify API keys 2 5 10
Overage (per billable verification) — €0.002 €0.0012
Billing Free Stripe subscription Stripe subscription
API surface Single, batch, stream, and async endpoints included on all tiers

A billable verification is one email where the API returns a result after syntax (layer 1). Syntax-only outcomes are free for Stripe billing; disposable, no-MX, SMTP, and successful paths count once per address. Batch and stream sum billable units per email in the payload. The free tier monthly cap counts every logged verification unit (see monthly quota). Full definition: billing and billable verifications. Monthly included caps reset each billing or calendar period. Per-key rate limits apply per HTTP request (sliding 60s). Prices exclude applicable taxes.