An open-source alternative to

Open-Source Email Verification Infrastructure

Validate emails instantly, reduce bounce rates, and protect your sender reputation in real time — with a fully open-source code

[01] THE PROBLEM/ EMAIL QUALITY

Email quality silently kills growth

Invalid and risky emails lead to bounce rates, spam flags, and wasted spend.

[ 01 ]
15% avg

High bounce rates.

Invalid emails cause hard bounces, hurting sender reputation and deliverability scores.

[ 02 ]
valid
BLOCKED
sender_reputation
HIGHLOW

Spam flags & reputation damage.

Sending to risky addresses triggers spam traps and blacklists that are hard to escape.

[ 03 ]
$10,000
$8,000
converting leads
$2,000
wasted spend
20%
Lost

Wasted acquisition spend.

Every invalid email is money spent on leads that will never convert or engage.

[ 04 ]
New user signup
Success
Email Failed
verification email not sent — low score detected

Broken onboarding flows.

Users who can't receive emails drop off before activation, killing conversion.

"
"

Most verification tools are black boxes — you never know why an email passed or failed.

Verifio shows you every check, every signal, every reason.
[02] SDK/ DEVELOPER TOOLS

Email Verification for Developers

Integrate email verification into your apps with our simple API and official SDKs. Ship faster with typed responses and comprehensive documentation.

Official SDKs — integrate in minutes with just a few lines of code

Built differently from traditional email verifiers.

We believe in transparency, flexibility, and giving you complete control over your infrastructure.

Transparent

See the exact signals behind every decision

Open-source

Audit, contribute, or self-host the engine

No Lock-in

Use our API or run it yourself

Infrastructure

Built to sit inside your data pipelines

[05] USE CASES/ BUILT FOR REAL PRODUCTS

If email quality matters to your product, Verifio fits.

The Verifio Difference

Built from the ground up with transparency and flexibility in mind.

Verifio
Traditional
open-source code×
Explainable results×
Self-host option×
API & SDK firstPartial
Free tier availableLimited
[07] PRICING/ VALUE PROPOSITION

Simple credit-based pricing

Only pay for what you use. No monthly commitments, no surprises.

Free Plan

Let us support your side project for free. When you grow, we grow with you.

100 credits (one-time)
$0one-time
  • Verify 100 emails
  • 1 API key
  • Community support
Most popular

Pay as you go

Your startup is growing and we think you need this. Scale without limits.

5,000 credits
$9one-time
  • Verify 5,000 emails
  • 5 API keys
  • Email support
  • $1.80 per extra 1k credits

Enterprise

Built for high volume and speed. Custom pricing for your needs.

Unlimited credits
Custom
  • Unlimited verifications
  • Unlimited API keys
  • Dedicated support
  • SLA available

Self-host with your own infrastructure

Own your verification infrastructure entirely. Use your own SMTP providers, DNS resolvers, and API keys. Deploy on your servers with full control over data, costs, and scaling.

Full data ownership
Unlimited Credits

1,000 free credits every month, forever. No credit card required. Start verifying emails today.

400,000

Emails verified till today

[06] FAQ/ EMAIL VERIFICATION QUESTIONS

Email Verification Basics

Features & Accuracy

API & Integration

Security & Compliance