OutMass

OutMass

Metis Information Technologies Ltd
lemlist

lemlist

lempire
+
+

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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.

About

Personalize cold emails, automate follow-ups, and engage with leads across all channels. lemlist is your sales automation and cold email software in one. From teams of 2 to 200+, lemlist solves every outreach automation challenge. Increase your reply rates by communicating with every prospect on a 1-on-1 level. Write custom intro lines and call-to-actions. Automatically put any screenshot, custom text, or company logos onto images in your emails. Add dynamic landing pages and embed videos. Launch powerful cold email sequences, send follow-ups that don't feel generic, and open more opportunities for your business. Close more deals by engaging with your leads across multiple channels on autopilot. Add cold calls and dial prospects with one click. Include custom tasks and social selling. Sync seamlessly with your team and quickly see at what stage a specific lead is in.

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

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

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.

Audience

Sales teams that need an effective personalized cold email solution

Support

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

Pricing

$9 per month
Free Version Supported
Free Trial Not Supported

Pricing

$29 per month
Free Version Not Supported
Free Trial 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:

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Reviews/Ratings

Overall 4.0 / 5
ease 3.0 / 5
features 5.0 / 5
design 4.0 / 5
support 5.0 / 5

Pros & Cons from Real Users

Pros

  • Such a unique way to create content that inspires users in emails and other ways. I like the customizability.

Cons

  • I had a difficult time implementing it as it's very unique.

Training

Documentation 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

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

Company Information

lempire
Founded: 2018
France
lemlist.com

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MailMerge365

MailMerge365

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Alternatives

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SalesTarget.ai

SalesTarget LLC
GBlast

GBlast

Snov.io

Categories

Bulk Email Supported
Mail Merge Supported

Categories

AI Sales Tools Supported
AI SDR Supported
Cold Email Supported
Email Marketing Supported
Lead Generation Supported
Mail Merge Supported
Sales Engagement Supported

Email Marketing Features

A/B Testing Supported
Artificial Intelligence Not Supported
Auto-Responders Not Supported
CAN SPAM Compliance Supported
Customer Surveys Not Supported
Drip Campaigns Supported
Dynamic Content Supported
Event Triggered Email Supported
Image Library Supported
Landing Pages/Web Forms Not Supported
Mailing List Management Not Supported
Mobile Optimized Emails Not Supported
Reporting/Analytics Supported
Subscriber Management Not Supported
Template Management Supported
WYSIWYG Email Editor Supported

Integrations

Microsoft Outlook Supported
5X Not Supported
Agiled Not Supported
Datablist Not Supported
FirstQuadrant Not Supported
Guideflow Not Supported
Knock2 Not Supported
KonnectzIT Not Supported
Microsoft 365 Not Supported
Octave Not Supported
Pharow Not Supported
Pipedrive Not Supported
Redcar Not Supported
Supaboard Not Supported
Tapistro Not Supported
Truto Not Supported
Writecream Not Supported
Wufoo Not Supported
Zapier Not Supported
lemcal Not Supported

Integrations

Microsoft Outlook Supported
5X Supported
Agiled Supported
Datablist Supported
FirstQuadrant Supported
Guideflow Supported
Knock2 Supported
KonnectzIT Supported
Microsoft 365 Supported
Octave Supported
Pharow Supported
Pipedrive Supported
Redcar Supported
Supaboard Supported
Tapistro Supported
Truto Supported
Writecream Supported
Wufoo Supported
Zapier Supported
lemcal Supported
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