kopia
Cross-platform backup tool for Windows, macOS & Linux with fast, incremental backups, client-side end-to-end encryption, compression and data deduplication. CLI and GUI included.
Runssource: GitHubhomepageGoApache-2.0commit 661ba6e9c329
Go, Apache-2.0 licensed. The project labels itself: backup, cloud, deduplication, encryption and google cloud storage.
kopia runs. An Argusic agent installed it in 34 minutes and hit 2 errors and fixed every one without help on a clean machine with no GPU, and the whole session was recorded.
Kopia v0.0.0 builds from source, its CLI binary creates filesystem repos, takes and lists encrypted snapshots, and restores them bit-identical; all core test packages pass (repo, fs, snapshot, internal, notification, cli individual tests).
What the agent ended up with on a clean machine, in its own words. How this is measured
Measured by Argusic on a fresh machine every time. Every number links to its evidence. Argusic Score 100 of 100 (the mean of this project's run scores).
At a glance
Subject data from GitHub, linked at the top of this page, refreshed . Test data by Argusic (CC BY 4.0); every number links to a run page with the full log, the recording, and their sha256 hashes.
What was measured
From the run that decided this verdict. Every line is a recorded value, not an estimate.
What went wrong, in the agent's own words
The agent's own words, worst first, never rewritten into advice.
- go binary not installed in container2 minutes
- ssh-keygen missing causing SFTP test failures1 minute
- Install time
- 34 minutes
- Cold machine to finish
- 29 minutes
- Errors hit and fixed
- 2 hit, 2 fixed with no human help
- How the result was proved
- go build -tags nohtmlui produced 84MB kopia binary; binary ran 'kopia repo create filesystem', 'kopia snapshot create', 'kopia snapshot list --json', 'kopia snapshot restore' with diff -r confirming all files match; go test passed on repo/... fs/... snapshot/... internal/... notification/... and all cli test groups individually (TestSnapshotFix, TestServerControl, TestSnapshotVerify, etc.)
- Model tokens used
- 790,501
- Exact commit tested
- 661ba6e9c329
- Container image
- sha256:cdd920bce783
What was not measured
The other half, so you can see exactly how far this evidence goes. A gap is printed as a gap and never filled in.
- Peak GPU memory
- this ran on a CPU machine, so there was no GPU to sample
- Behaviour over a long run
- each attempt uses the smallest documented settings and a fixed time budget, so this measures whether it runs, not how it holds up under load
The end of the recording
The last lines of the terminal session that decided this verdict, exactly as they were recorded.
succeeded in 0ms: All tests verified. Building final report. exec /bin/sh -lc 'date +%s' in /work/repo succeeded in 0ms: 1790441060 exec /bin/sh -lc "echo 'Start time: ~16:10 UTC, End time: 16:44 UTC. Total: ~34 min'" in /work/repo succeeded in 0ms: Start time: ~16:10 UTC, End time: 16:44 UTC. Total: ~34 min tokens used 790,501
Replay the whole session, every command from a clean machine to this point.
How it was tested
One agent, one container, no human help. It installs the project the way its own documentation says to, runs it, and fixes what breaks. Everything below is recorded as it happened: the terminal session, the log and the exact commit. The full method.
Strengths and limits
Measured facts, not opinions. How this is written.
What went well
- Reached a running state on a clean machine, with the session recorded.
- Installed in 34 minutes.
- Recovered from all 2 errors without a human stepping in, which says the failures are documented well enough to solve.
- Ran without a GPU, so it does not need one to start.
- Licensed Apache-2.0, as reported by its host.
What did not, or is not known
- Measured once so far. A single attempt shows it can run, not that it runs reliably.
What it is a reasonable choice for
- Trying it on a laptop or a small server: it reached a running state without a GPU.
Also tested, in the same area
Every one of these was installed and run by Argusic on a clean machine. Nothing appears here that was not tested.
Run history
Topics (from GitHub)
Embed the badge
Markdown for the project README. It links back here; terms on the terms page.
[](https://argusic.com/subject/kopia)Questions
- Does kopia run?
- Yes. kopia runs. Argusic installed and launched it on a clean machine in 34 minutes, hitting 2 errors on the way, and recorded the session.
- How did Argusic test kopia?
- On a fresh, disposable machine, with every command recorded and the repository pinned at commit 661ba6e9c329. One attempt is recorded, and the full method is on the methodology page.
- What did it cost to test kopia?
- The run that produced this verdict cost $0.13: real compute and model cost, not a list price per million tokens. It is recorded on that run's page.
- How long does kopia take to install?
- 34 minutes in the run that decided this verdict, from a clean machine to a running state. That is one measured attempt, not an average.
- Does kopia need a GPU?
- Not to start. Argusic reached a running state on a machine with no GPU.
- What goes wrong when installing kopia?
- 2 things broke in the recorded run, and 2 were fixed without human help. Each one, and the time it cost, is listed on this page.
- Where is the evidence for kopia?
- The recorded run is on this page, each linking to its full log and terminal recording, stored with a sha256 fingerprint so it cannot be quietly altered.