GMass vs Mailmeteor (2026): which should you pick?

Pick GMass if

• Fits if you already send from Gmail and your list lives in a Google Sheet
• Works for solo senders who want follow-ups without another app, from $29 a month on Premium billed annually

Look elsewhere if

• Not for you if you use Outlook or another mail service, as it needs Gmail or Google Workspace and Chrome
• Skip it if you want LinkedIn steps, which GMass doesn't do
• Tight if you're on Standard at $20 a month, which has no automatic follow-ups
• Pricey if you send from several inboxes, as each Gmail account is its own subscription and rotation needs Professional
• Watch out: Gmail's own daily sending limits still apply, and GMass's SMTP service costs $5 per 10,000 messages

Pick Mailmeteor if

• Fits if you send mail merges from Gmail to a few hundred people
• Works for people who keep their contacts in Google Sheets

Look elsewhere if

• Tight if you stay free: 50 emails a day and 3 campaigns
• Pricey if you want follow-ups or warmup, which need Premium at $17.99 a user
• Skip it if you want the assistant in Outlook, as it works only in Gmail
• Watch out: Pipelines is early access and team analytics is marked coming soon

GMass

• Needs a Gmail or Google Workspace account and the Chrome browser; campaigns are written and sent from inside Gmail.
• Each subscription covers one Gmail account, and the Standard plan has no automatic follow-ups.
• Inbox rotation needs Professional or a Team plan; sending through GMass's own SMTP service costs $5 per 10,000 messages.
• Gmail's own daily sending limits still apply to anything sent through the Gmail account itself.

Mailmeteor

• Limits are strict: 50 emails a day on the free plan, 250 on Starter and up to 2,000 on Professional.
• Follow-ups, email warmup and the full email assistant need the Premium plan at $17.99 per user / month.
• The email assistant works only in Gmail; the sending features also cover Outlook and SMTP providers.
• Pipelines is marked early access and team analytics is marked as coming soon on the pricing page.

GMass

Campaigns from the Gmail compose window

Write a campaign as an ordinary Gmail message, address it to a list, label or Google Sheet, and send it with the GMass button from your own account.

Automatic follow-ups

Unlimited follow-up stages that stop when a contact replies, clicks or opens, sent in the same thread or as new ones. Needs Premium or above.

Google Sheets campaigns

Merge fields come from a Google Sheet, GMass picks up edits made before a scheduled send, and new rows can be emailed automatically.

Inbox rotation and SMTP

MultiSend spreads one campaign across several mailboxes on Professional and Team, and an SMTP server can carry sends larger than Gmail allows.

Reports in Gmail, the dashboard and the web

Opens, clicks, replies, bounces and blocks arrive as Gmail reports, in the dashboard and as shareable web reports, with an AI Deep Analysis of the results.

AI writing and SpinMax

AI can draft a full campaign with its follow-ups, and SpinMax varies the wording of every email in a campaign automatically.

Mailmeteor

Mail merge campaigns

Send personalized emails from Gmail, Outlook, Google Sheets, Google Docs or Excel, using variables and per-recipient attachments.

Tracking and follow-ups

An email tracker shows opens, and the Premium plan adds automatic follow-ups and Sheet automations for outreach sequences.

Email verification and warmup

Starter adds verification of addresses before sending, and Premium adds email warmup and a custom tracking domain.

Email assistant for Gmail

Sorts incoming mail with labels, drafts replies in the user's tone and rewrites messages. The full assistant starts on Premium and works only in Gmail.

Lead tools

Free tools for finding and checking email addresses sit alongside the sending tools for building a prospect list.

GMass

• Standard$20

  per account / month, billed annually ($29.95 billed monthly)

  Unlimited emails, contacts and campaigns, mail merge, email verification and Spam Solver. No automatic follow-ups. $249 a year.

• Premium$29

  per account / month, billed annually ($39.95 billed monthly)

  Adds sequences and automatic follow-ups, A/B testing, triggered emails, and the API and Zapier. $349 a year.

• Professional$49

  per account / month, billed annually ($59.95 billed monthly)

  Adds inbox rotation across several sending accounts (MultiSend) and high-priority support. $599 a year.

• Team$145

  per month for up to 5 users, billed annually ($175 billed monthly)

  Every feature, including inbox rotation, for 5 Gmail accounts. Packs of 10, 25, 50 and 100 users cost less per user.

Mailmeteor

• Hobby$0

  500 emails a month, 50 a day, 3 campaigns and 1 sender, with templates, tracking and scheduling.

• Starter$5.99

  per user / month, billed monthly

  5,000 emails a month, 250 a day, unlimited campaigns, Autopilot, email verification and reply detection.

• Premium$17.99

  per user / month, billed monthly

  30,000 emails a month, 1,000 a day, 5 senders, follow-ups, Sheet automations, email warmup and AI drafts.

• Professional$35.99

  per user / month, billed monthly

  60,000 emails a month, 2,000 a day, 10 senders, inbox rotation, Pipelines (early access) and priority support.

GMass

• Annual discount

  Save up to 31% with annual billing

  Standard costs $249 a year against $29.95 a month billed monthly, a saving of about 31%; Premium saves about 27% and Professional about 17%.

• Education

  15% off for .edu Google Workspace accounts

  GMass's pricing FAQ says Google Workspace users on a .edu domain get 15% off the published prices, applied automatically after subscribing.

• Nonprofit

  15% off for .org Google Workspace accounts

  The same 15% discount applies automatically to Google Workspace accounts on a .org domain; nonprofits on other domains do not get it.

Mailmeteor

• Annual discount

  Yearly billing, 3 months free

  Yearly billing is $53.99 for Starter, $161.99 for Premium and $323.99 for Professional per user, which the page describes as 3 months free.