Subsurface can plan and track single and multi-tank dives using air, Nitrox or TriMix. It allows tracking of dive locations including GPS coordinates (which can also conveniently be entered using a map interface), logging of equipment used and names of other divers, and lets users rate dives and provide additional notes. Subsurface also calculates a wide variety of statistics of the user’s diving and tracks information like the SAC rate, partial pressures of O2, N2 and He, calculated deco information, and many more.
Publisher’s description
What is Subsurface?
Subsurface by Subsurface is open-source Windows software in the firewall & privacy category. It ranks 18th by popularity among firewall & privacy in this catalogue. It is written in C++. Besides Windows, it is available for Linux.
Installation and requirements
The publisher provides EXE (NSIS) installers for 64-bit Windows. The main installer is 86.7 MB. A silent install is possible with the installer’s documented switches.
Updates and version history
The current version is 6.0.5504, released on December 22, 2025. The version history goes back to October 4, 2022: 5 releases, all linked to the official files. That is about 1.6 releases a year.
Popularity and file types
The Chocolatey package has been downloaded 5,360 times. The source code on GitHub (subsurface/subsurface) has 3,216 stars. Similar programs include OnionShare, Portmaster and dnscrypt-proxy.
Project description on GitHub: “This is the official upstream of the Subsurface divelog program”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Documented silent install
- Also runs on Linux
Cons
- No native ARM64 build
In short: Subsurface is an open-source firewall & privacy tool for 64-bit PCs. Administrators can deploy it unattended.
Key features
- Detailed dive profiles with tank pressure curves and gas analysis
- Calculated SAC rate, partial pressures of O2, N2 and He, and decompression information
- Built-in dive planner
- Printable detailed log books with profiles and notes
- Localized in about 20 languages
AppStream · Flathub
Is Subsurface safe to download?
- The file is served by subsurface-divelog.org; check that it is the publisher’s official mirror
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
C23CC1421141D271FA4D7E624F30359F047842E75843375264275ABB55AD1795· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Security practices (OpenSSF Scorecard)
Automated checks of the subsurface/subsurface repository on GitHub by the Open Source Security Foundation, last run on October 19, 2026.
- Actively maintained10
- No dangerous workflows10
- No binaries in the repository10
- Licence declared10
- Static code analysis10
- Code review3
- Restricted token permissions0
- OpenSSF Best Practices badge0
- Security policy0
- Fuzzing0
- Signed releases0
- Pinned dependencies0
The score rates how the project is developed and released, not whether the program is safe to install. scorecard.dev
Recent versions
All 5 versions ›5 versions over 3 years · about 1.6 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 6.0.5504Latest | December 22, 2025 | 86.7 MB | 64-bit EXE (NSIS) |
| 6.0.5436 | September 16, 2025 | 82.5 MB | 64-bit EXE (NSIS) |
| 6.0.5404 | June 10, 2025 | 82.5 MB | 64-bit EXE (NSIS) |
| 6.0.5365 | March 27, 2025 | 82.3 MB | 64-bit EXE (NSIS) |
| 5.0.10 | October 4, 2022 | 77.5 MB | 64-bit EXE (NSIS) |
Install from the command line
Silent install ›winget install --id Subsurface.Subsurface -echoco install subsurface -ysubsurface-6.0.5504-CICD-release-installer.exe /SRelated guide: How to use winget: install and update apps
Also for other systems
flatpak install flathub org.subsurface_divelog.SubsurfaceInformation
- Publisher
- Subsurface
- Category
- Firewall & privacy
- Licence
- GPL-2.0
- Price
- Free
- Source code
- github.com/subsurface/subsurface
- Written in
- C++
- Content rating
- All ages
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- EXE (NSIS)
- Other platforms
- Linux
- Version
- 6.0.5504
- Released
- December 22, 2025
- Added to the catalogue
- October 30, 2022
- Versions listed
- 5
- Updates / year
- 1.6
- Chocolatey downloads
- 5,360
- GitHub stars
- 3,216
- GitHub forks
- 611
- Website
- subsurface.github.io
- winget ID
- Subsurface.Subsurface
- Chocolatey package
- subsurface
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Subsurface free?
Yes. Subsurface is open-source software under the GPL-2.0 licence.
Is Subsurface safe to download?
The download comes from subsurface-divelog.org; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Subsurface with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Subsurface be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does Subsurface run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Where can I download an older version of Subsurface?
The versions page lists all 5 versions with links to their official installer files, back to October 4, 2022.
What are alternatives to Subsurface?
OnionShare, Portmaster, dnscrypt-proxy, Prey Anti-Theft and DingTalk Workspace CLI. The alternatives page compares them.
