To the inbox and beyond

Verify 10,000 emails with enterprise accuracy

Eliminate bounces and safeguard your sender reputation with real-time email verification.

Import. Verify. Outreach.

Stop wasting credits on bad data. When you import your CSV lists into Overloop, our system automatically runs a deep verification check on every single contact before they enter your workflows.

Seamless Import: Drag and drop your prospect lists directly into Overloop.‍
Automatic Validation: Overloop flags invalid emails immediately upon import.
‍Safety filters: Verified leads are immediately available for your campaigns.‍

Launch in just 5 minutes

Strict verification for maximum deliverability

Don’t just check the syntax.
Overloop performs a multi-step validation to ensure your emails actually land.

Syntax & Domain Healtht

We instantly reject typos and domains that are inactive or miss-configured (MX records), keeping your list hygienic from the start.

SMTP Handshake

Overloop pings the recipient's mail server to confirm the specific mailbox exists, without sending an actual email.

Catch-All Detection

We identify servers that accept all incoming mail (Catch-All). In Overloop, these are marked as "uncertain", allowing you to decide whether to take the risk or play it safe.

Automate verification via API

Keep your CRM clean programmatically. When you create a prospect via the Overloop API, we automatically verify their email status, returning distinct values for valid, invalid, or uncertain.

Start Automating

Usecases

Why verification matters for your pipeline

Verify my list

Protect your domain health and don't get blocked

High bounce rates are the fastest way to land in the spam folder. Overloop prevents invalid emails from ever receiving a message, keeping your sender score high.