iSpy vs Kerberos.io Machinery
A side-by-side comparison of two self-hosted video surveillance options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | iSpy | Kerberos.io Machinery |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 58 · Fair | 10 · At risk |
| Status | Actively maintained | Archived |
| Category | Video Surveillance | Video Surveillance |
| License | LGPL-3.0 | Apache-2.0 |
| Language | C# | C++ |
| Setup difficulty | Medium | Medium |
| Min. RAM | 2,048 MB | 512 MB |
| Deployment | bare-metal | docker, binary, source |
| GitHub stars | ★ 1,624 | ★ 486 |
| First released | 2007 | 2014 |
| Replaces | Blue Iris | Milestone XProtect, Blue Iris |
What are iSpy and Kerberos.io Machinery?
iSpy
iSpy is open-source video surveillance software for Windows that turns cameras and microphones into a monitoring system. It supports motion detection, alerts, and remote access through a companion service.
- Motion detection and alerts
- Audio monitoring
- Plugin support
- Remote access
Kerberos.io Machinery
Kerberos Machinery is the open-source video surveillance recording engine of the Kerberos.io ecosystem. It captures, records, and processes video from IP and USB cameras with motion detection and event-based recording.
- Video recording engine
- Motion-based capture
- IP and USB camera support
- Event-driven processing
iSpy vs Kerberos.io Machinery: key differences
The biggest difference is maintenance: Kerberos.io Machinery's repository is archived and no longer developed, while iSpy is actively maintained. ISpy is written in C#, while Kerberos.io Machinery is built with C++. Licensing differs — LGPL-3.0 for iSpy versus Apache-2.0 for Kerberos.io Machinery. Kerberos.io Machinery is the lighter option, starting around 512 MB of RAM against 2,048 MB for iSpy. ISpy is the more established project (first released 2007), while Kerberos.io Machinery arrived in 2014. ISpy has the considerably larger community, at 1,624 GitHub stars versus 486. Kerberos.io Machinery lists first-class Docker deployment; iSpy does not.
Why pick each one
Choose iSpy if…
- Long-established
- Many camera integrations
Watch out for
- Windows-only
- Superseded by Agent DVR
Choose Kerberos.io Machinery if…
- Lightweight engine
- Part of broader ecosystem
Watch out for
- Best with Kerberos suite
- Single-camera per instance
Frequently asked questions
Is iSpy or Kerberos.io Machinery better?
Neither is universally better. iSpy has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are iSpy and Kerberos.io Machinery free and open-source?
Yes. iSpy is licensed under LGPL-3.0 and Kerberos.io Machinery under Apache-2.0. Both can be self-hosted at no software cost.
Can I run iSpy and Kerberos.io Machinery with Docker?
iSpy: check the project docs for container support. Kerberos.io Machinery: yes.
Which is lighter on resources, iSpy or Kerberos.io Machinery?
Kerberos.io Machinery has the smaller minimum footprint at 512 MB of RAM, compared to about 2,048 MB for iSpy. Real-world usage depends on library size, user count, and enabled features.