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OutMass

Chrome extension by OutMass · Productivity · Communication

  • Established publisher
  • Trader

A Chrome extension in Productivity · Communication with 181 users, barely installed. Audience over the last 30 days: +69.

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
181
Rating
not rated yet
Users, last 30 days
+69
Version
0.3.18
Updated in the store
2026-10-19
Published
2026-04-19
Manifest
V3
Browser access
3 permissions, 6 site patterns

How it has moved

Users
+69 since 01.10
112-181 · 17 readings
2026-10-04: released 0.3.152026-10-08: released 0.3.162026-10-12: released 0.3.172026-10-19: released 0.3.18
  1. 2026-10-04132released 0.3.15
  2. 2026-10-08145released 0.3.16
  3. 2026-10-09146
  4. 2026-10-11140
  5. 2026-10-13142
  6. 2026-10-16149
  7. 2026-10-18150
  8. 2026-10-19149released 0.3.18
  9. 2026-10-21152
  10. 2026-10-22158
  11. 2026-10-23165
  12. 2026-10-24174
  13. 2026-10-25172
  14. 2026-10-28177
  15. 2026-10-29178
  16. 2026-10-30181
  17. 2026-10-31181
Users
+116 since 31.08
65-181 · 31 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 0.3.102026-09-16: released 0.3.112026-09-20: released 0.3.122026-09-25: released 0.3.132026-09-29: released 0.3.142026-10-04: released 0.3.152026-10-08: released 0.3.162026-10-12: released 0.3.172026-10-19: released 0.3.18
  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
  9. 2026-09-1686released 0.3.11
  10. 2026-09-2093released 0.3.12
  11. 2026-09-2191
  12. 2026-09-25100released 0.3.13
  13. 2026-09-26113
  14. 2026-09-28112
  15. 2026-10-04132released 0.3.15
  16. 2026-10-08145released 0.3.16
  17. 2026-10-09146
  18. 2026-10-11140
  19. 2026-10-13142
  20. 2026-10-16149
  21. 2026-10-18150
  22. 2026-10-19149released 0.3.18
  23. 2026-10-21152
  24. 2026-10-22158
  25. 2026-10-23165
  26. 2026-10-24174
  27. 2026-10-25172
  28. 2026-10-28177
  29. 2026-10-29178
  30. 2026-10-30181
  31. 2026-10-31181

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times 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 0.3.18
  2. Version 0.3.17
  3. Version 0.3.16
Show the remaining 5
  1. Version 0.3.15
  2. Version 0.3.14
  3. Version 0.3.13
  4. Version 0.3.12
  5. Version 0.3.11

What changed recently

  1. Package size changed
  2. Released version 0.3.18 (was 0.3.17)
  3. Package size changed
Show the remaining 9
  1. Released version 0.3.17 (was 0.3.16)
  2. Package size changed
  3. Released version 0.3.16 (was 0.3.15)
  4. Package size changed
  5. Store description rewritten
  6. Released version 0.3.15 (was 0.3.14)
  7. Package size changed
  8. Released version 0.3.14 (was 0.3.13)
  9. Package size changed

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 31 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 7k users ★ 4.7
  4. OutReach Pilot Describes nearly the same job, smaller audience 4 users
  5. HyPeMa — Precise Email Outreach Describes nearly the same job, smaller audience 14 users ★ 5.0

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.

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Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/adcfddainnkjomddlappnnbeomhlcbmm/badge.svg)](https://extops.dev/extensions/adcfddainnkjomddlappnnbeomhlcbmm)

HTML

<a href="https://extops.dev/extensions/adcfddainnkjomddlappnnbeomhlcbmm"><img src="https://extops.dev/extensions/adcfddainnkjomddlappnnbeomhlcbmm/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-10-30. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built