Compare · Gmail mail-merge tool
Autocloz vs GMass
GMass is a Gmail-based mass-email and mail-merge extension for sending campaigns from your inbox.
GMass is great for simple Gmail mail-merges, but it's tied to Gmail and is email-only with no CRM or other channels. Autocloz is a full platform: multichannel sequences, a free CRM, deliverability tooling and compliance — beyond what a Gmail extension can do.
| GMass | Autocloz | |
|---|---|---|
| Channels | Email (Gmail) | Email, calling, LinkedIn, SMS & WhatsApp in one login |
| CRM / pipeline | None | Free-forever AI-native CRM |
| Deliverability + warmup | Basic | Warmup + DMARC/DKIM/SPF + placement tests |
| Mailboxes | Your Gmail | 50 free, unlimited on paid (Google/MS/SMTP) |
| Compliance gate | Not a focus | TCPA/DNC/quiet-hours across channels |
Frequently asked
Is Autocloz a GMass alternative?
For anything beyond simple Gmail merges, yes. Autocloz adds multi-mailbox sending, warmup, deliverability monitoring, four more channels and a free CRM — not just a mail-merge from your inbox.
More Autocloz comparisons
See why teams switch to Autocloz
All five channels + a free-forever CRM, unlimited users.