Ext Ops Panel
Open the app

OutMass

Chrome extension by OutMass · Productivity · Communication

  • Trader

A Chrome extension in Productivity · Communication with 82 users, barely installed.

Specific sites only: 6 match patterns.

What the developer says, and 6 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
82
Rating
not rated yet
Users, last 16 days
+17
Version
0.3.10
Updated in the store
2026-09-13
Published
2026-04-19
Manifest
V3
Browser access
3 permissions, 6 site patterns

How it has moved

Users
+17 since 31.08
65-82 · 8 readings
2026-09-03: released 0.3.32026-09-04: released 0.3.42026-09-06: released 0.3.62026-09-08: released 0.3.72026-09-08: released 0.3.82026-09-10: released 0.3.92026-09-14: released 0.3.10
  1. 2026-08-3165
  2. 2026-09-0266
  3. 2026-09-0468released 0.3.4
  4. 2026-09-0670released 0.3.6
  5. 2026-09-0871released 0.3.7released 0.3.8
  6. 2026-09-0975
  7. 2026-09-1381
  8. 2026-09-1582
Users
+17 since 31.08
65-82 · 8 readings
2026-09-03: released 0.3.32026-09-04: released 0.3.42026-09-06: released 0.3.62026-09-08: released 0.3.72026-09-08: released 0.3.82026-09-10: released 0.3.92026-09-14: released 0.3.10
  1. 2026-08-3165
  2. 2026-09-0266
  3. 2026-09-0468released 0.3.4
  4. 2026-09-0670released 0.3.6
  5. 2026-09-0871released 0.3.7released 0.3.8
  6. 2026-09-0975
  7. 2026-09-1381
  8. 2026-09-1582

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 6 match patterns.

  • https://outlook.live.com/*
  • https://outlook.office.com/*
  • https://outlook.office365.com/*
Show the remaining 3
  • https://outlook.cloud.microsoft/*
  • https://api.getoutmass.com/*
  • https://outmass-production.up.railway.app/*
  • Sign you in with a Google account identity
  • Schedule work to run later alarms
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 0.3.10
  2. Version 0.3.9
  3. Version 0.3.8
Show the remaining 4
  1. Version 0.3.7
  2. Version 0.3.6
  3. Version 0.3.4
  4. Version 0.3.3

What changed recently

  1. Package size changed
  2. Released version 0.3.10 (was 0.3.9)
  3. Package size changed
Show the remaining 9
  1. Released version 0.3.9 (was 0.3.8)
  2. Package size changed
  3. Released version 0.3.8 (was 0.3.7)
  4. Package size changed
  5. Released version 0.3.7 (was 0.3.6)
  6. Package size changed
  7. Released version 0.3.6 (was 0.3.4)
  8. Package size changed
  9. Released version 0.3.4 (was 0.3.3)

Older entries and the full day by day series are in the app.

The publisher

OutMass. Listed website: getoutmass.com.

Like this one

Listings the catalog judges closest in what they say they do.

  1. OutreachMerge — Mail Merge for Outlook & Microsoft 365 Describes nearly the same job, smaller audience 28 users
  2. MailFlow Pro: Mail Merge Gmail Outlook Describes nearly the same job, smaller audience 85 users ★ 5.0
  3. Send Mass Mail + HTML inserter for Gmail Describes nearly the same job, smaller audience 8k users ★ 4.7
  4. OutSends – Cold Email & Mail Merge for Gmail Describes nearly the same job, smaller audience 17 users ★ 5.0
  5. SendIQ Describes nearly the same job, smaller audience 19 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.