Audience

Sales and business development teams, recruiters and staffing agencies, marketers, consultants and virtual assistants — individuals and small-to-mid-size teams who run outreach from Microsoft 365 or Outlook.com and want personalized bulk email with tracking and follow-ups without leaving Outlook.

About OutMass

OutMass is a browser extension for Chrome and Edge that adds mass-email and mail-merge capability to Outlook on the web. Campaigns are built inside Outlook itself, and every message is sent through the user's own Microsoft account via the official Graph API, so recipients see a normal email rather than a bulk sender. Microsoft 365 and personal Outlook accounts are both supported. Campaigns start from a CSV: each column becomes a merge tag, and every recipient gets a personalized message. Open and click tracking show who engaged, and a daily reply check catches responses. Automated follow-ups re-contact non-openers and stop the moment someone replies. Scheduled sending, per-day send limits, A/B subject testing, an AI email writer, reusable templates, campaign reports with CSV export, unsubscribe links and OneDrive-link attachments complete the toolset. The interface is available in 13 languages. Free plan: 250 emails per month. Starter: $9/month for 2,500. Pro: $19/month for 10,000.

Other Popular Alternatives & Related Software
MailMerge365
MailMerge365
MailMerge365 lets you send mass mail through Microsoft 365. Campaigns are sent through your own Microsoft 365 business mailbox ensuring the best deliverability and response rates as each email looks like you crafted it yourself and is less likely to go into the promotional tab. It allows users to create email campaigns from Outlook, connect to spreadsheets to personalize them, track opened emails, links and response rates, automatically detect unsubscribes and bounces, schedule campaigns, follow up with non-responders and view reports. It caters to professionals like fundraisers, recruiters and founders.
Learn more about MailMerge365
GMass
GMass
A mass email service inside of Gmail. Get the highest open rates you've ever seen. Send cold emails with sequences that maximize responses. Send mail merge campaigns with automatic follow-ups. Pull from Google Sheets, not CSV files. Send emails as replies to the last thread with each person. Personalize. Schedule. Track opens, clicks, replies. Validate your list with our built-in verifier to maximize the deliverability. Say goodbye to CSV files. Connect to Google Sheets to send a personalized mass email using any of the columns in your spreadsheet. Use Gmail's powerful search feature to find messages containing recipients to whom you want to email. Then click the Build Email List button, and a Compose window will load containing the email addresses found in those messages. The only mass email service that does this! The easiest way to send cold email sequences in Gmail.
Learn more about GMass
EmailMerge365
EmailMerge365
EmailMerge365 is an Outlook add-in for creating and sending personalized bulk email from Microsoft 365. Users can choose recipients from Outlook contacts or import Excel lists, then personalize message content and subject lines with merge fields. The add-in supports message previews, reusable templates, immediate or scheduled sending, and sending through the user's Microsoft 365 mailbox. Optional tracking plans add email-open and link-click reporting, with a limit of 200 emails per tracked merge. EmailMerge365 is designed for individuals and organizations that need to send individualized announcements, newsletters, invitations, or other group messages while working in Outlook. The add-in works with Classic Outlook for Windows, New Outlook, Outlook on the web, and Outlook for Mac.
Learn more about EmailMerge365
Send Personally
Send Personally
A proven Outlook mass email add-in that not only provides true bulk mailouts in Outlook but also enables high-level personalization in your mailings: you can send individual emails to a great number of recipients via Microsoft Outlook seamless and easily! Create the Outlook message as you usually would, apply the distribution list and just click ‘Send Personally’ button instead of native ‘Send’ one. Perform bulk mailing in Outlook but provide a personal greeting for each recipient: name; surname or email address. Even if you are sending a message to an entire list of recipients, only one contact will be displayed in the ‘To’ field.
Learn more about Send Personally

Pricing

Starting Price:
$9 per month
Free Version:
Free Version available.

Integrations

See Integrations

Ratings/Reviews

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Company Information

Metis Information Technologies Ltd
Founded: 2026
United Kingdom
getoutmass.com

Videos and Screen Captures

Get Started
Other Useful Business Software
$300 Free Credits to Build on Google Cloud Icon
$300 Free Credits to Build on Google Cloud

New customers can spin up VMs, build with AI, and query data at no cost.

Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.
Start Free

Product Details

Platforms Supported
Cloud
Training
Documentation
Support
Online

OutMass Frequently Asked Questions

Q: What kinds of users and organization types does OutMass work with?
OutMass works with these users and organization types: Mid Size Business, Small Business, Enterprise, Freelance, Nonprofit, Government, and Startup.
Q: What languages does OutMass support in their product?
OutMass supports these languages: English.
Q: What kind of support options does OutMass offer?
OutMass offers support via online.
Q: What other applications or services does OutMass integrate with?
OutMass integrates with: Google Chrome and Microsoft Outlook.
Q: What type of training does OutMass provide?
OutMass provides training in the form of documentation.
Q: How much does OutMass cost?
Pricing for OutMass starts at $9 per month.

OutMass Product Features

Page Already Claimed. Claim Again?