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Checkmate Copilot

Chrome extension by sphinx_labs · Productivity · Tools

A Chrome extension in Productivity · Tools with 27 users, barely installed. Audience over the last 30 days: +1.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 3 screenshots

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

Users
27
Rating
5.0 (4 ratings)
Users, last 30 days
+1
Rating, last 30 days
Steady over 30 days
Version
3.1.8
Updated in the store
2026-05-27
Published
2025-09-05
Manifest
V3
Browser access
7 permissions, 3 site patterns

How it has moved

Users
+1 since 01.10
24-28 · 14 readings
  1. 2026-10-0827
  2. 2026-10-0928
  3. 2026-10-1027
  4. 2026-10-1326
  5. 2026-10-1625
  6. 2026-10-1726
  7. 2026-10-1824
  8. 2026-10-1925
  9. 2026-10-2128
  10. 2026-10-2227
  11. 2026-10-2328
  12. 2026-10-2426
  13. 2026-10-2927
  14. 2026-10-3127
Rating
unchanged since 01.10
reviewsrating 5.00 · 14 readings
  1. 2026-10-08reviews4rating5.00
  2. 2026-10-09reviews4rating5.00
  3. 2026-10-10reviews4rating5.00
  4. 2026-10-13reviews4rating5.00
  5. 2026-10-16reviews4rating5.00
  6. 2026-10-17reviews4rating5.00
  7. 2026-10-18reviews4rating5.00
  8. 2026-10-19reviews4rating5.00
  9. 2026-10-21reviews4rating5.00
  10. 2026-10-22reviews4rating5.00
  11. 2026-10-23reviews4rating5.00
  12. 2026-10-24reviews4rating5.00
  13. 2026-10-29reviews4rating5.00
  14. 2026-10-31reviews4rating5.00
Users
-1 since 01.09
24-30 · 26 readings
  1. 2026-09-0128
  2. 2026-09-0330
  3. 2026-09-0429
  4. 2026-09-0630
  5. 2026-09-0729
  6. 2026-09-1026
  7. 2026-09-1327
  8. 2026-09-1528
  9. 2026-09-1727
  10. 2026-09-2126
  11. 2026-09-2527
  12. 2026-09-2826
  13. 2026-10-0827
  14. 2026-10-0928
  15. 2026-10-1027
  16. 2026-10-1326
  17. 2026-10-1625
  18. 2026-10-1726
  19. 2026-10-1824
  20. 2026-10-1925
  21. 2026-10-2128
  22. 2026-10-2227
  23. 2026-10-2328
  24. 2026-10-2426
  25. 2026-10-2927
  26. 2026-10-3127
Rating
unchanged since 01.09
reviewsrating 5.00 · 26 readings
  1. 2026-09-01reviews4rating5.00
  2. 2026-09-03reviews4rating5.00
  3. 2026-09-04reviews4rating5.00
  4. 2026-09-06reviews4rating5.00
  5. 2026-09-07reviews4rating5.00
  6. 2026-09-10reviews4rating5.00
  7. 2026-09-13reviews4rating5.00
  8. 2026-09-15reviews4rating5.00
  9. 2026-09-17reviews4rating5.00
  10. 2026-09-21reviews4rating5.00
  11. 2026-09-25reviews4rating5.00
  12. 2026-09-28reviews4rating5.00
  13. 2026-10-08reviews4rating5.00
  14. 2026-10-09reviews4rating5.00
  15. 2026-10-10reviews4rating5.00
  16. 2026-10-13reviews4rating5.00
  17. 2026-10-16reviews4rating5.00
  18. 2026-10-17reviews4rating5.00
  19. 2026-10-18reviews4rating5.00
  20. 2026-10-19reviews4rating5.00
  21. 2026-10-21reviews4rating5.00
  22. 2026-10-22reviews4rating5.00
  23. 2026-10-23reviews4rating5.00
  24. 2026-10-24reviews4rating5.00
  25. 2026-10-29reviews4rating5.00
  26. 2026-10-31reviews4rating5.00

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

Every site you visit. This extension can read and change the content of any page you open.

  • Read and change cookies on the sites it can access cookies
  • Attach to pages the way developer tools do debugger
  • See the address and title of every tab you have open tabs
Show the remaining 4

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

sphinx_labs publishes 2 listings we track, 37 users between them.

  1. Sphinx Copilot Lite sphinx_labs · Productivity · Workflow · published 2026-08-19 10 users ★ 5.0

Like this one

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

  1. Docket AI Describes nearly the same job, smaller audience 55 users ★ 5.0
  2. Alpha Copilot Describes nearly the same job, smaller audience 4 users (last published figure)
  3. PolicyGuard AI Describes nearly the same job, smaller audience 4 users
  4. SEQUESTO Describes nearly the same job, smaller audience 41 users
  5. Praxivara Assistant Describes nearly the same job, smaller audience 13 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.

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The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

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

HTML

<a href="https://extops.dev/extensions/pichlfoaldllfchfjfalglflmkfponcl"><img src="https://extops.dev/extensions/pichlfoaldllfchfjfalglflmkfponcl/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 2026-10-29. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built