OutMass

OutMass

Metis Information Technologies Ltd
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+

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About

Listmailer is a professional yet simple email solution designed for people who just want to send emails. It allows you to send personalized bulk emails directly using Outlook, Gmail, or any SMTP provider—no new platform or confusing dashboards required. With ListMailer, you can safely reach your audience without triggering “Promotions” tabs, thanks to plain-text-style emails and a persistent global opt-out list that protects your reputation. Upload your contact list from CSV, Google Sheets, or Airtable, map variables for personalized messaging, and connect your preferred provider. Pay only for what you send and avoid per-contact fees or monthly SaaS traps. From small personal campaigns to larger business outreach, ListMailer offers flexible yearly pricing, unlimited emails, and high-speed sending with full SMTP freedom.

About

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.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Send personalized bulk emails directly from your own email account. Fast, simple, and without hidden costs.

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.

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

No images available

Screenshots and Videos

No images available

Pricing

Free
Free Version Supported
Free Trial Supported

Pricing

$9 per month
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

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

Reviews/Ratings

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

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Listmailer
Founded: 2026
Germany
www.listmailer.dev

Company Information

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

Alternatives

Alternatives

MailMerge365

MailMerge365

Sol Inventum
EmailMerge365

EmailMerge365

Standss (South Pacific) Pte Limited
GBlast

GBlast

Snov.io
EmailMerge for Outlook

EmailMerge for Outlook

Standss South Pacific Pte Ltd

Categories

Mail Merge Supported

Categories

Bulk Email Supported
Mail Merge Supported

Integrations

Gmail Supported
Google Chrome Not Supported
Microsoft Outlook Not Supported

Integrations

Gmail Not Supported
Google Chrome Supported
Microsoft Outlook Supported
Claim Listmailer and update features and information
Claim Listmailer and update features and information
Claim OutMass and update features and information
Claim OutMass and update features and information