Zen by IrBis is a free, open-source desktop application that blocks ads and trackers across Windows, macOS, and Linux by routing traffic through a built-in local proxy, with optional HTTPS filtering and community filter lists.[1][2]
Quick verdict
Zen is a free, open-source desktop ad- and tracker-blocker that filters traffic system-wide through a local proxy, so everyday Windows, macOS, and Linux users get fewer ads without switching browsers or paying for a premium tier.[1][2]
Capabilities
Zen routes all device traffic through a built-in local proxy, so blocking applies across browsers and apps rather than inside a single browser.[1]
Optional HTTPS filtering decrypts and re-encrypts traffic locally after the user installs a locally generated root certificate.[1]
Filtering combines default hosts and EasyList lists with custom, regional, and user-defined rules, plus geo-unblocking rules.[1]
Zen is completely free with no premium version, and its source is published under the MIT License.[1][2]
Good fit
Individuals who want ad- and tracker-free browsing without switching away from their current browser.[1][2]
Everyday users rather than network engineers: the site states no technical knowledge is required and the tool just works.[1]
Desktop users on Windows, macOS, or Linux, including people who want fewer ads in apps such as YouTube, Twitch, and Spotify clients.[1]
Limitations
Desktop only: official sources document Windows, macOS, and Linux, with no mobile platform support stated.[1][2]
HTTPS filtering requires installing a locally generated root certificate, which is a trust decision the user must make deliberately.[1]
Blocking can break websites, and resolving it requires working through diagnostics such as disabling HTTPS filtering or updating lists.[1]
Community
Public repository activity snapshot of irbis-sh/zen-desktop observed on 2026-10-13: 4264 stars, 141 forks, 760 commits, and 51 releases on a non-archived, non-fork repository created in May 2023. No review-site or forum threads were inspected.
1 cited community source. Stars and forks measure attention, not satisfaction or correctness; no Reddit or G2 reports were inspected, so user-experience claims beyond repository activity remain unsupported.
Development happens in the open in the irbis-sh/zen-desktop repository, with versioned releases and a published changelog.[1]
The public repository shows sustained attention: 4264 stars, 141 forks, 760 commits, and 51 releases on a non-archived project created in May 2023.[1]
Distribution is community-friendly: one-line installs via winget, Homebrew, AUR, and Nix alongside graphical installers.[1]
Compatibility
Questions worth asking
Is Zen really free?
Yes. The official site states Zen is completely free with no premium version, and that donations are optional and never required.[1]
Which platforms does Zen support?
Does Zen work with my current browser?
Yes. Zen filters traffic system-wide, so it works with whatever browser is already installed and there is no need to switch browsers.[1]
What should I do if Zen breaks a website?
The README documents a diagnostic sequence: check for conflicting extensions or VPNs, turn off HTTPS filtering, update filter lists, and ask in the community chat if the breakage persists.[1]
Sources and editorial review
Source research. Reviewed on October 13, 2026. Written by Sanjib Sah. AI assisted; reviewed by a human editor.
We have not run or tested this product.
Public repository activity snapshot of irbis-sh/zen-desktop observed on 2026-10-13: 4264 stars, 141 forks, 760 commits, and 51 releases on a non-archived, non-fork repository created in May 2023. No review-site or forum threads were inspected. Stars and forks measure attention, not satisfaction or correctness; no Reddit or G2 reports were inspected, so user-experience claims beyond repository activity remain unsupported.
- Zen - Ad-free, tracker-free internet (official site)
official · Observed October 13, 2026
Official Zen site by IrBis: free open-source cross-platform positioning, no premium version, ads/trackers/malware radar, repository and docs links, browser-independent use, FAQ answers.
- irbis-sh/zen-desktop README (official repository)
official · Observed October 13, 2026
Canonical irbis-sh/zen-desktop README: proxy architecture, HTTPS filtering, filter lists, installs, Go/React stack, local-only data, MIT license, breakage diagnostics, app ad-blocking notes.
- Brave official site (incumbent evidence)
official · Observed October 13, 2026
Brave official site: blocks third-party ads and trackers by default including YouTube ads; supports the competitor relationship for the ad/tracker-free browsing job.
- irbis-sh/zen-desktop repository page (public activity signals)
community · Observed October 13, 2026
Canonical public repository page as observed: 4264 stars, 141 forks, 760 commits, 51 releases, created 2023-05-27, not a fork, not archived; topics include ad-block, privacy, desktop-app, go. Used only for repository-activity claims, not for product facts.
Compared with these products
No explicit proprietary baseline is recorded.