Innmail vs GMass
Innmail vs GMass is a choice between mass email from inside Gmail and personal outreach you approve one email at a time. GMass is a Chrome extension that lives in your Gmail inbox. Innmail is a web app with a Chrome side panel that sends from your own Gmail or SMTP/IMAP mailbox, deliberately capped and reviewed.
Start free with your own mailboxWhere you work: inside Gmail or beside it
GMass adds its controls to the Gmail screen you already use. Innmail is a separate web app with its own inbox view of your mailbox, plus a Chrome extension side panel where you can write, preview and send campaigns from your Innmail account while you browse.
If you never want to leave Gmail, GMass suits that habit. If you want a calmer space for outreach, with your campaigns, history and replies in one place, Innmail is built for that.
Mass email vs one email at a time
GMass is built for mass email and mail merge from Gmail. Innmail is built to stay small on purpose. It sends one email at a time with a randomized delay between sends, inside a daily cap. New mailboxes start with a low daily limit that grows a little each day up to a ceiling you set, and direct sends and campaigns share that one budget.
Campaigns also only send inside a sending window, during working hours and optionally on weekdays only, so nothing lands at 3 a.m.
Follow-ups: similar idea, different guardrails
Both tools send follow-ups that stop when someone replies. In Innmail you get up to four follow-ups in the same thread. Around them sit a few guardrails: a review queue for first emails, a send reservation so the same step is never sent twice, a one-click unsubscribe link in every campaign email, a suppression list for unsubscribes and bounces, and an automatic pause if bounces climb.
When GMass is the better choice
Choose GMass if you want everything inside Gmail, if you regularly send large mailings such as announcements to big lists, or if your team is on Google Workspace and a per-user subscription suits how you buy software. Innmail is not trying to be a mass email tool, and it says so.
Innmail and GMass at a glance
| Innmail | GMass | |
|---|---|---|
| Sends from | Your one real Gmail or SMTP/IMAP mailbox | Your Gmail or Google Workspace account |
| Where you use it | Web app and Chrome side panel | Chrome extension inside Gmail |
| Follow-ups | Up to four, in the same thread, stop on reply | Automated follow-ups that stop on reply |
| Built for | Personal one-to-one outreach you approve email by email | Mass email and mail merge from Gmail |
| Pricing model | Free daily credits; optional credit packs or monthly credits | Per-user subscription |
Based on each product's public description as of 2026. Check GMass's site for current details.
Frequently asked questions
Is Innmail a GMass alternative?
For personal, one-to-one outreach, yes. For mass email to large lists, no; Innmail caps daily sending on purpose and GMass is the better fit for volume.
Do I need Chrome to use Innmail?
No. Innmail is a web app that works in any modern browser. The Chrome extension is an optional side panel for writing, previewing and sending campaigns.
Can I use Innmail without Google Workspace?
Yes. Besides Gmail, Innmail connects any provider that supports SMTP and IMAP with an app password, such as Zoho, Fastmail or iCloud.
How does pricing compare with GMass?
GMass uses a per-user subscription. Innmail gives 500 free credits every day, one credit per accepted send, with optional credit packs or month-to-month plans and no lock-in.
Can I check emails before they send?
Yes. "Preview each email" shows every message as each recipient will see it, and the review queue holds each first email until you approve, edit or skip it.
Personal outreach, one email at a time.
Connect your Gmail or any SMTP mailbox, approve each email, and let follow-ups stop the moment someone replies. 500 free credits every day.
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