# BlockBlock privacy rating

A free macOS tool from Objective-See that monitors common persistence locations and alerts when software tries to install itself to run at startup.

## Summary

BlockBlock scores 80 out of 100 (grade B) on the macOS hardening criteria. It meets 3 of 4 criteria: open source, no trackers or telemetry and no ads or data sales. It does not meet independent audit. It is based in the United States: Five Eyes member; subject to the US CLOUD Act.

- Website: https://objective-see.org/products/blockblock.html
- Source code: https://github.com/objective-see/BlockBlock
- License: GPL-3.0
- Jurisdiction: United States. Five Eyes member. Subject to the US CLOUD Act.
- Platforms: macOS
- Home page trackers: none found
- Category: [macOS hardening](https://privacyratings.com/macos-hardening/)
- Also rated: [LuLu](https://privacyratings.com/firewalls/lulu/) (Firewalls), [KnockKnock](https://privacyratings.com/macos-hardening/knockknock/) (macOS hardening), [OverSight](https://privacyratings.com/macos-hardening/oversight/) (macOS hardening)
- Grade: B (80/100)

## Criteria

| Criterion | Answer | Note | Evidence |
| --- | --- | --- | --- |
| Open source | Yes | GPL-3.0. | https://github.com/objective-see/BlockBlock/blob/master/LICENSE.md |
| No trackers or telemetry | Yes | No telemetry or analytics in the source code, and no trackers on the website. | https://github.com/objective-see/BlockBlock |
| No ads or data sales | Yes | Free tool from the non-profit Objective-See Foundation, funded by donations and sponsors, with no ads. | https://objective-see.org/about.html |
| Independent audit | No | No independent audit is published. |  |

Source: https://privacyratings.com/macos-hardening/blockblock/
Edit: https://github.com/privacyratings/privacyratings.com/edit/main/ratings/macos-hardening/blockblock.md