Run the EVA engine on your own servers. Zero per-email costs, all updates and support included. $4,995/yr, about half the price of the only comparable self-hosted verifier.
Four reasons teams choose to run the engine instead of paying per email.
Stop paying per verification. One flat annual license, and every email you verify is free. Verify 10 emails or 10 million. Same cost.
Emails never leave your servers. Full GDPR compliance by default. Your data, your infrastructure, your rules.
Deployment licenses ship production images. OEM licensees receive the complete Go source under a signed agreement: read it, audit it, extend it.
Docker Compose on any Linux server. AWS, GCP, Azure, on-premise: your choice. 15 minutes from download to first verification.
Everything you need to run a production-grade email verification engine.
The full 28-check verification engine
Syntax, DNS, SMTP, provider-specific APIs, disposable, role-based, catch-all scoring, deliverability, spam trap, reputation, Gravatar. Source code included on the OEM license.
Provider-specific strategies (Google, Microsoft, Yahoo, Apple, and more)
Dedicated SMTP engines and API integrations for every major mail provider.
Bulk processing up to 50,000 emails
CSV/XLSX upload, background workers, webhook notifications on completion.
PostgreSQL + Redis stack
Full schema with migrations, Redis caching layer for performance.
Docker Compose deployment
Production-ready Compose files with health checks and resource limits.
Prometheus metrics + monitoring
Pre-built Grafana dashboards and metric endpoints ready out of the box.
GitHub Actions CI/CD pipeline
Lint, test, security scan, and deploy workflows included.
All updates and priority support included
Mail providers change behavior constantly. When Yahoo moved its validation endpoint in June 2026, licensees had the fix within days. Your annual license covers every update and new provider strategy we ship.
Cloud verifiers charge $2.00 to $2.75 per 1,000 emails at volume. The $4,995/yr deployment license works out to $416/mo, and the per-email cost is zero.
250,000 emails/mo
500,000 emails/mo
1,000,000 emails/mo
Cloud column uses published volume rates from leading per-check verification services ($2.00 to $2.75 per 1,000 emails). Self-hosted cost is the $4,995/yr deployment license ÷ 12 months, updates and support included, $0 per email at any volume. For comparison, the only other commercial self-hosted verifier charges €699/mo (€8,388/yr) for the software alone.
A flat annual license to run the engine, or a perpetual source license to own it. No per-email fees, payment plans available.
Deployment License
Run EVA inside your own business. Unlimited volume, flat price.
OEM Source License
Perpetual license. Embed verification inside your own product, with full source you keep.
Delivered under a signed license agreement. Neither license permits offering email verification as a standalone product or service to third parties. Want to run a verification service on the EVA engine? Service licenses start at $75,000, milestone payments available. Email sales.
Everything you need to know before you buy.
Go 1.24. The entire codebase compiles to a single binary with zero runtime dependencies. Fast, lightweight, and straightforward to audit and extend.
Any Linux server with Docker. Minimum: 1 CPU, 1 GB RAM. Recommended: 2 CPU, 4 GB RAM for production workloads. Works on AWS, GCP, Azure, DigitalOcean, Hetzner, or bare metal.
Deployment licensees pull updated Docker images for as long as the license is active; every provider fix and new verification strategy is included in the $4,995/yr price. OEM licensees pull from the private source repository, with the first year of updates included and maintenance at $5,995/yr after that. Mail providers change their behavior constantly, so updates are what keep accuracy high.
The Deployment License is annual: production use requires an active license, and updates and support stop when it lapses. Renewal is the same flat $4,995/yr, never more per volume. The perpetual OEM Source License is different: the source and the right to use it are yours permanently, and only the update stream depends on maintenance.
For SMTP-grade accuracy, yes. Most clouds block outbound port 25, and a fresh IP has no sender reputation, so mail servers distrust it. The engine ships with proxy rotation built in: point it at a specialist SMTP proxy provider (typically around $49/mo per IP) and we walk you through the setup as part of onboarding. Syntax, DNS, disposable, and provider API checks work without any proxy.
The Deployment License ships production Docker images, which is everything you need to run unlimited verifications. The OEM Source License adds the complete Go source with the right to modify, extend, and embed it in your own product. Neither license permits reselling the source, redistributing it, or offering email verification as a standalone service to third parties. Source is delivered under a signed agreement.
Because they grant different rights, not different software. The Deployment License lets you use the engine. The OEM License transfers our core asset, the source of a provider-specific verification engine that took years of research to build, plus the right to ship it inside your commercial product. You are buying rights, not bits.
Yes. The OEM license is available as a term license at $1,495/mo with a 12-month minimum, and larger licenses can be paid in milestones (for example on signing, on delivery, and after acceptance). Email us and we will structure something workable.
Same verification engine, same capabilities. Self-hosted runs on your infrastructure with zero per-email costs, ideal for high-volume or compliance-sensitive use cases. Cloud is fully managed by us with usage-based pricing and no infrastructure work required.
$4,995/yr, unlimited verifications, zero per-email costs, updates and support included. Deploy in 15 minutes.