Scale Outreach Without Burning Your Domain.

Startups move fast, but sending to invalid emails kills your sender reputation before you get traction. VeriMails gives you API-first verification at startup-friendly prices.

We cleaned a 62K early customer waitlist before the launch email. VeriMails found 4,700 invalid or disposable addresses, and bounces dropped from 6.5% to 0.9%.
Miles B. — Founder at Early-Stage Startup, Denmark
TLDR

The short version: verify first, then send.

Scale your outreach without burning your domain. VeriMails gives startups API-first email verification with startup-friendly pricing. 100 free credits to start. The practical move is to catch invalid, disposable, role-based, and catch-all records before they enter a live campaign, CRM sync, or customer workflow.

Workflow diagram showing startup email verification from signup and lists to clean growth campaigns
Use verification before new signups enter automations and before campaign lists go live. Connect the verification API first, then check volume against pricing.

A startup's email infrastructure is fragile in a way an established company's is not. A brand-new sending domain has no track record with mailbox providers, which means it has no reputation to fall back on when something goes wrong. Send your first cold campaign or your first product announcement to a list full of invalid addresses, and the resulting hard bounces tell Gmail and Outlook that this unknown domain is mailing bad data. The sender reputation you needed to earn slowly gets damaged before you have earned anything at all, and recovering it costs weeks you do not have.

Startups also capture email in fast, messy ways. A signup form with no validation lets typos and disposable addresses straight into your database. A bought lead list or a prospecting-tool export can include addresses that were never confirmed. Early outbound runs out of whatever sequencer is cheapest that month. Every one of those paths feeds unverified addresses into the same place, and every unverified send raises your bounce rate and chips away at inbox placement for the campaigns that actually matter to growth.

VeriMails is built to fit how a small team actually works. There is no procurement process and no sales call: sign up, get 100 free credits and an API key immediately, and integrate the verification API in about 30 minutes. Add a real-time check to your signup form so fake addresses never enter the database, and use bulk verification to clean any list before your first send. Pricing starts from $0.0019 per email with no minimums and no contract, and credits never expire, so it scales with you instead of ahead of you. Start in the API docs or read how email verification works.

Built for fast-moving teams

API-first verification that fits your stack, your budget, and your pace.

API-First Design

Simple REST API for real-time checks. One endpoint, one API key, JSON in and out. Start from clear examples and raise throughput when your volume grows.

Startup-Friendly Pricing

Credit-based from $0.0019 per verification. No monthly minimums, no contracts, no surprises. Scale from 100 verifications to millions without changing plans.

Protect Your Domain Early

New domains are fragile. One bad campaign can permanently damage your sender reputation. Verify every email before your first outreach sequence goes live.

Real-Time Signup Validation

Block fake signups at the front door. Add API verification to your signup form and catch typos, disposable emails, and invalid addresses before they enter your database.

Bulk CSV Uploads

Bought a lead list? Export from a prospecting tool? Upload the CSV and get results in minutes. Filter to valid-only and import into your outreach tool of choice.

Works With Your Stack

REST API works with any language or framework. Native integrations with HubSpot, Salesforce, Zapier, and more. Webhook support for async workflows.

Up and running in minutes

No procurement process. No sales calls. Just sign up and start verifying.

01

Sign up and get your API key

Create a free account in 30 seconds. Get 100 free credits and your API key immediately. No credit card required.

02

Integrate or upload

Add a single API call to your app, or upload a CSV through the dashboard. Both paths take as a background job.

03

Send to verified contacts only

Filter results by status, keep the valid addresses, and keep your bounce rate in a healthy range. Scale with confidence.

curl -X POST https://verimails.com/api/v1/verify \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "test@example.com"}'
SMTP
Live mailbox checks
API Response Time
$0.0019
Per Verification
100
Free Credits to Start

Frequently asked questions

Common questions from startup teams.

Yes. VeriMails starts with 100 free credits on signup and one-time credit pricing from $0.0019 per verification. There are no monthly minimums, no contracts, and no hidden fees. You only pay for what you use, and credits never expire.
Most developers integrate VeriMails in under 30 minutes. The API is a simple REST endpoint: send a POST request with an email address, get back a JSON response with the verification result. We provide code examples in Python, Node.js, PHP, Ruby, and Go.
Yes. The VeriMails API is designed for real-time verification at signup forms, checkout flows, and lead capture pages. Block invalid emails before they enter your database.
API calls will return a 402 status code when your balance runs out. Your account stays active and you can top up instantly. There are no overage charges or surprise bills.
VeriMails works with any stack via the REST API. We also offer native integrations with HubSpot, Salesforce, Mailchimp, and dozens of other tools via Zapier. If you can make an HTTP request, you can use VeriMails.
For our startups list, the useful part is the status field, not just a pass or fail. We can separate valid, invalid, disposable, and catch-all contacts before anyone sends to the next launch email.
Keira B. — Founder at Early-Stage Startup Operations, Portugal

Start verifying today

100 free credits. No credit card required. No sales call needed.

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