Google Sheets add-on

Verify email lists without leaving your spreadsheet.

EVADDON, also known as Email Verification Add-on, helps Google Sheets users validate email addresses one by one or in bulk, manage prepaid credits, and review verification history from a sidebar inside Sheets.

Setup guide Help and support
What it does Single-email verification, bulk verification jobs, prepaid credit balance, and secure payment flows for extra credits.
How it works The add-on runs inside Google Sheets and sends verification requests only when you explicitly launch a verification action.

Single checks

Validate addresses row by row and write status results back into your sheet.

Bulk runs

Submit larger lists for asynchronous processing and import finished results when they are ready.

Prepaid credits

Buy verification credits as needed and use them later. One credit equals one verification.

Public documentation

Setup Help Contact Privacy Policy Terms of Service

EVADDON is operated by Duffco Ventures LLC. For support, contact ryan@emailverificationaddon.com.

Last updated April 21, 2026.