Cofferdam as a NetBox alternative
An honest comparison. NetBox is excellent at what it was built for, and if it fits your operation you should keep running it. This page is for the teams who keep hitting the same walls: the physical layer, power, thermal, and the operational overhead of running the stack.
Updated
What NetBox does brilliantly
NetBox is the open-source standard for a reason, and we built Cofferdam to be compatible with it rather than pretend it away.
NetBox is the source of truth behind a huge share of the world's network automation. Its data model for devices, interfaces and IP space is mature, its plugin ecosystem is deep, and its community is unmatched. It is free to run, and NetBox Labs offers a cloud edition if you would rather not host it. If your primary need is documenting a network for automation, NetBox remains a superb answer, and Cofferdam integrates with it as a first-class citizen.
Where teams tell us NetBox starts to fight them is the physical side of the room: cabling workflows beyond point-to-point records, power as a system rather than a set of port entries, anything thermal, and the audit question, which is whether the room actually matches the database. Those are the problems Cofferdam was built around.
NetBox and Cofferdam, feature by feature
Both tools model your infrastructure. The difference is how far past the record each one goes.
| Capability | NetBox | Cofferdam |
|---|---|---|
| Licence and model | Open source (Apache 2), self-managed or NetBox Cloud | Commercial, self-hosted binary or managed single-tenant instance |
| Primary focus | Source of truth for network automation: devices, IPAM, connections | The physical layer as a living system: racks, cabling, power, thermal, plus IPAM |
| Deployment | Python application with database, web server and workers to operate | Single self-hosted binary, or we run a dedicated instance for you |
| IPAM | Mature, widely integrated | Full IPAM with a NetBox-API-compatible endpoint, so NetBox integrations keep working |
| Racks and devices | Rack elevations and device inventory | Rack elevations plus health checks that flag where the record disagrees with reality |
| Cabling | Cable records between ports | Cable records plus proposed patching with end-to-end polarity checking and work-order labels |
| Power | Power ports and feeds as records | A living single-line diagram: feeds, PDUs, and rack loads as a connected model |
| Thermal | Not modelled | Thermal floor plans of the room from your environmental telemetry |
| Physical-layer audits | Via community plugins and scripts | Built in: optics beyond span reach, transceiver mismatches, rack feeds with no PDU consumer |
| Migration | n/a | Direct import of NetBox sites, racks, devices, cables and IP space |
The comparison above reflects NetBox's core open-source feature set as we understand it; the plugin ecosystem extends it in many directions, and your mileage will vary with your stack.
Your automation keeps working
Cofferdam exposes a NetBox-API-compatible IPAM endpoint. Proxmox SDN plugins, Nautobot mirrors, and the network scripts your team has accumulated keep talking to the same shape of API they always did, with little or no change. Migration is not a cliff: Cofferdam imports your sites, racks, devices, cables and IP space directly from NetBox, so you evaluate it against your real estate rather than a demo dataset.
Read our guide to what separates DCIM from NetBox, or book a demo.
Other NetBox alternatives, compared honestly
Cofferdam is not the right answer for every team that outgrows NetBox. Here is how the other common options differ, so you can rule tools in or out quickly.
| Tool | Licence | Focus | Path from NetBox | Worth a look if |
|---|---|---|---|---|
| Nautobot | Open source (Apache 2), with paid tiers and a cloud edition | Network source of truth and automation | Official NetBox importer, documented for NetBox 3.0 to 3.7 | You want a NetBox-style source of truth with Git integration and custom relationships |
| Device42 | Commercial, annual subscription by device count | Discovery and CMDB, with DCIM features | None documented | Continuous auto-discovery across a large, mixed estate is the priority |
| Sunbird dcTrack | Commercial, on-premises or hosted | Enterprise DCIM | None documented | You want an established DCIM with a very large library of device models |
| Hyperview | Commercial SaaS with published per-asset pricing | Cloud DCIM | None documented | You want DCIM as a hosted service, with floor plans and sensor heatmaps |
| Infrahub | Open source community edition (Apache 2), commercial enterprise edition | Schema-driven infrastructure data management | Infrahub Sync, from NetBox | You want to define your own schema and work mainly through GraphQL |
| phpIPAM | Open source (GPL 3) | IP address management | None documented | IP space is the real need and racks are secondary |
| openDCIM | Open source (GPL 3) | Rack, cabling and power documentation | None documented | You want a free, self-hosted DCIM; the last tagged release was October 2023, with development continuing on its main branch |
| RackTables | Open source (GPL 2) | Rack and port documentation | None documented | Simple rack records are enough; the last tagged release was February 2022, though the repository still sees commits |
| Cofferdam | Commercial, self-hosted binary or managed single-tenant instance | The physical layer: racks, cabling, power, thermal, plus IPAM | Direct import of sites, racks, devices, cables and IP space, plus a NetBox-API-compatible IPAM endpoint | NetBox holds your network record, but power, cabling work, thermal and physical audits live somewhere else |
If open source is a hard requirement
Then Cofferdam is not your answer: it is commercial software. Nautobot is the closest open-source relative of NetBox, since it began as a fork of NetBox and ships an official importer. phpIPAM is a mature choice for IP address management. openDCIM and RackTables cover rack documentation, so check their release activity against your support needs before committing.
Details checked against each project's own documentation and release pages on 15 September 2026: Nautobot, Device42, Sunbird, Hyperview, Infrahub, phpIPAM, openDCIM and RackTables. Products change quickly, so confirm anything that matters to your decision with the vendor.