Fundraising, newsletters, GOTV, and press, from the Gmail inbox your campaign is already using.
Free to install. No credit card required.
Trusted by 400,000+ GMass users
11,500+ ratings and reviews across Chrome, G2, and Capterra.
Built for campaigns and committees at every level.
GMass brings personalization, follow-ups, and reporting into the Gmail inbox your team already knows.
Fundraising appeals, newsletters, GOTV, welcome emails, and press, all from the same Gmail compose window.
Personalize each ask with the donor’s suggested amount.
Suggested amounts from your Google SheetSend the right update to the supporters who need it.
Target by location, interest, or supporter statusSchedule district-level reminders down to the minute.
Send at the exact time you chooseWelcome new signups automatically before the next ask.
Write the sequence oncePersonalize every pitch by reporter and outlet.
Replies reach the person who sent itConnect your Google Sheet, write in Gmail, and click the GMass button.
Choose a Google Sheet. Every column becomes a merge field.
Personalize by name, district, donor history, or volunteer status.
Send from your address. Replies return to your inbox.
Free to install. No credit card required.
GMass catches common deliverability problems before your campaign goes out.
See what may trigger spam filters before sending.
Check whether messages reach Inbox, Promotions, or Spam.
Review SPF, DKIM, DMARC, and blacklist status.
Remove invalid addresses before a major send.
Stop sending to addresses that repeatedly bounce.
Automatically suppress supporters who opt out.
Target tracked non-openers, non-clickers, or non-repliers from the original campaign.
One personalized email to the full supporter list.
8,412 recipientsSend again without including contacts tracked as opened.
4,504 recipientsSend a shorter message to the most engaged audience.
2,766 recipientsReplies and unsubscribes stop follow-ups automatically. To exclude new donors or volunteers, update their status in the connected Google Sheet.
All included, all inside Gmail, with no new tool to learn.
Queue GOTV, event, and fundraising-deadline emails in advance.
Test two subject lines before sending to the full list.
See opens, clicks, replies, bounces, and opt-outs.
Candidate, finance, and communications staff use their own inboxes.
Exclude unsubscribed and repeatedly bouncing addresses automatically.
Add your committee’s required disclaimer to every send.
Public reviews about Gmail integration, ease of use, follow-ups, reporting, and deliverability.
“I needed to send an important update to 545 community members from my regular Gmail account, and GMass made it completely seamless.”
“GMass has been a great tool for someone like me who is not very techy and is just getting started with email campaigns. I found it surprisingly easy to use and very helpful for reaching out to potential clients.”
“I was used to doing mail merges in Outlook and Word and didn’t think Gmail could do the same thing, but GMass makes it just as easy. Took me about 10 minutes to set up my first campaign. Clean, simple and it actually works.”
“I love that it integrates with Gmail so I never have to leave my inbox. It also integrates with Google Sheets and with uploaded Excel documents, so I can add lists all at once.”
“The best cold outreach tool I recommend to people. Tracks real-time metrics like opens, clicks, replies and bounces. Supports Google Sheets for contact management and segmentation.”
“Features like spam solver and multisend are really a game changer. The range of customisations genuinely makes it more useful than any other provider. It has saved me a good amount of time, and money.”
Verified public reviews from the Chrome Web Store and G2.
Yes. Export to a Google Sheet, CSV, or Excel file and connect it. Any column, such as first name, district, last gift, or volunteer status, becomes a personalization or filtering field.
Gmail’s account limits still apply. Depending on your plan and setup, GMass can spread a larger campaign over several days, distribute it across connected accounts, or route eligible messages through SMTP. See sending-limit options.
No email platform can guarantee the inbox, and any that claims to is overstating it. GMass tests placement against seed accounts, verifies addresses, checks authentication, and manages bounces before they damage future sends.
No. Plans are priced on features and the number of users, not the size of your supporter list, so growing the list does not raise the bill. Automated follow-ups and A/B testing need a paid plan, and multiple staff accounts need a team plan. See the pricing page.
GMass connects through Google OAuth, so no password is ever shared. The permissions cover campaign sending, replies, bounces, and follow-ups. Access can be revoked from the campaign’s Google account at any time.
GMass adds the unsubscribe link and maintains the suppression list. The campaign supplies its required paid-for language. Requirements vary by committee and jurisdiction, so confirm the wording with campaign counsel.
Install the extension, connect your list, and send your first campaign in minutes.
Free to install · No credit card required · Chrome on desktop
400,000+ GMass users
