Conditions, not lists
Describe the state that deserves an email — Payment = Pending, Score > 80 — and Mailvern emails only those rows.
Google Workspace Add-on
Send smarter emails straight from Google Sheets
Mailvern is conditional mail merge. Choose rules like Payment = Pending and personalized Gmail emails go out only to the rows that match — never to your whole list.
3-day trial on paid plans · Works with Gmail and Google Workspace
Q3 — client invoices.gsheet
| Client | Amount | Payment | |
|---|---|---|---|
| Aarav Mehta | aarav@northloop.co | $1,240 | Pending |
| Sara Bright | sara@brightlabs.io | $860 | Paid |
| Devika Rao | devika@kadence.in | $2,100 | Pending |
| Tom Whitfield | tom@fieldwork.dev | $430 | Paid |
| Neha Kapoor | neha@sparkhr.com | $1,595 | Pending |
Condition
Payment=Pending
Matching rows
0of 5
Send to matching rows
Paid rows are skipped. Nothing leaves your sheet.
- Google Workspace Add-on
- Privacy first
- Works inside Google Sheets
- No CSV imports
- No learning curve
Why Mailvern
Mail merge that respects your data and your list
Traditional tools blast everyone and ask you to upload your customers first. Mailvern does neither.
Lives inside Sheets
A sidebar in the sheet you already use. No exporting, no importing, no CSV files to babysit.
Privacy by architecture
Campaigns send from your own Gmail. Your customer data never has to be uploaded to third-party servers.
Live in five minutes
Install, open your sheet, pick conditions, send. There is nothing new to learn.
Inside Mailvern
Sending controls in your sheet. Everything else, built properly.
Set conditions and fire campaigns from the Sheets sidebar. Compose in a dedicated email editor, and measure it all in a full analytics dashboard.
Condition builder
PaymentequalsPending
Supported operators
- equals
- contains
- does not contain
- greater than
- less than
Multi-condition AND / OR groupsComing soon
27 rows match — everyone else is skipped.
Subject: {{Invoice}} is due on {{Due Date}}
Hi {{First Name}},
A quick note that invoice {{Invoice}} for {{Amount}} is still showing as pending on our side.
Pay invoiceCampaign analytics
Invoice reminders · last 7 days
1,284
Sent
71%
Opened
2,910
Total opens
0+
Emails sent from Sheets
0%
Inbox delivery via Gmail
0
Rows exported to our servers
0 min
Average time to first send
Comparison
Mailvern vs traditional mail merge
The difference is not features — it is whether you can send to a condition instead of a list.
| Capability | Mailvern | Traditional |
|---|---|---|
| Send only to rows matching conditions | Yes | No |
| Works entirely inside Google Sheets | Yes | No |
| No CSV export or import | Yes | No |
| Data uploaded to a third-party server | No | Yes |
| Auto Run on new matching rows | Yes | No |
| Duplicate protection built in | Yes | Partial |
| Send from your Gmail aliases | Yes | Partial |
| Open tracking written back to the row | Yes | No |
| Setup time | Under 5 minutes | Hours of list prep |
Use cases
One sheet, a dozen workflows
Invoices, follow-ups, admissions, hiring, renewals — if the state lives in a column, Mailvern can email it.
Finance teams
Invoice reminders
Keep invoices in a sheet and let Mailvern email only unpaid rows with the amount, invoice number and due date filled in.
Invoice = Unpaid
Operations
Payment follow-ups
Auto Run re-checks the sheet daily and follows up on rows that are still pending — once each.
Payment = Pending
Sales teams
Lead nurturing
Score your leads in the sheet and send tailored emails to each band with the right message.
Score > 80
Schools & colleges
Student notifications
One sheet, one campaign: notify only the students in a given batch, section or status.
Batch = 2026
Recruiters & HR
Recruitment
Send interview invites to approved candidates and polite rejections to the rest — from the same sheet.
Status = Shortlisted
Success teams
Customer onboarding
Every new row marked Onboarding gets a personalized welcome sequence within the hour.
Stage = Onboarding
Loved by spreadsheet people
What people say after switching
Real feedback from people running campaigns straight out of their sheets.
“We used to filter the invoice sheet by hand every Monday. Now auto-run emails only the unpaid rows and our collections cycle dropped by nine days.”
“Condition based sending is the whole thing. Shortlisted candidates get interview invites, everyone else gets a proper reply — from one tracker.”
“No CSV, no upload, no data leaving our Workspace. That was the only way our IT team would approve a mail merge tool.”
“I set up my first campaign in under five minutes and it looked like something our designer made. The editor is genuinely good.”
Your customer data stays in your Workspace
Mailvern never requires uploading customer data to third-party servers to send campaigns. It reads the sheet you opened it in and sends through your own Gmail account, using only the permissions sending actually needs.
Sent from your GmailMinimum scopesNo list uploadsAudit trail in Sent
Google Workspace Marketplace
Start sending smarter emails today
Install Mailvern from the Google Workspace Marketplace and run your first conditional campaign in under five minutes.
3-day trial on paid plans · Works with Gmail and Google Workspace