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
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.
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.
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.
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.
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.
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"email": "test@example.com"}'
Frequently asked questions
Common questions from startup teams.
Related pages
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