When Should You Actually Pay for Altium?
By the CADPreview Team · Series: KiCad is Enough
"The goal was never to avoid paying for tools. The goal was to pay for the right ones, for the right reasons."
Fit for purpose cuts both ways. If KiCad is enough for your work, use KiCad. If it isn't, stop pretending it is.
We've spent three articles making the case for KiCad. So let me say the thing that case depends on:
Some teams genuinely need Altium. And if your team is one of them, the money is well spent.
The argument for KiCad was never that Altium isn't good. The argument was that most teams pay for capability they don't use, on every seat, every renewal cycle, without asking whether the work actually demands it. The honest version of that argument requires being equally precise about when the work does demand it.
When Constraint Management Is Doing Real Engineering Work
KiCad handles USB, Ethernet, LVDS, and PCIe Gen 2 in the hands of an engineer who knows what they're doing. KiCad 10 closed part of the remaining gap: it introduced a full time-domain tuning system where DRC rules are written in picoseconds, propagation delay is derived automatically from your fabricator stackup, and pad-to-die delay is a first-class field. That's a meaningful shift from length-only tuning.
What KiCad still doesn't have is live impedance feedback during interactive routing — Altium shows you impedance in real time as you place traces, backed by a field solver. KiCad's impedance verification happens after the fact, in the PCB Calculator. It also lacks bus-wide constraint coordination: enforcing a collective timing budget across all lanes of a DDR5 or PCIe Gen 4 bus simultaneously, rather than tuning each pair individually.
For DDR4 and PCIe Gen 3 and below, KiCad 10's delay tuning is now genuinely competitive in experienced hands. For DDR5 and PCIe Gen 4 and above, where the interactive routing feedback loop and bus-level constraint enforcement matter, Altium still has a structural advantage. At that tier of complexity, the tool isn't just verifying — it's shaping design decisions in real time.
If your designs sit in that top tier, Altium earns its price. Know honestly which tier your designs sit in.
When Your Team Has Outgrown Shared Git Libraries
A small team with clear ownership of a shared library runs well in KiCad. The situation changes when you have multiple engineers contributing simultaneously, a formal part approval process, BOM attributes that need to stay synchronised across symbol, footprint, and schematic, and someone responsible for auditing everything against lifecycle and supply chain data.
KiCad gives you the files. It does not give you the governance infrastructure. You can build it yourself, on top of the design tool, on your own engineering time. Altium's library management comes with that infrastructure already built. If managing it yourself is a real cost at your team size, that built-in governance is what you're paying for, and it's a legitimate thing to pay for.
When ECAD and MCAD Are Iterating in Parallel
KiCad exports STEP, which handles the majority of mechanical integration needs. For products where mechanical design is largely settled before PCB layout begins, this is sufficient.
Some products aren't built that way. Consumer electronics where the board shape is driven by a chassis that's still changing. Wearables where every millimetre is contested. In those environments, the manual STEP export cycle is a genuine drag on the project. Altium's MCAD Co-designer closes that loop. If your ME and EE teams are iterating on the same constrained geometry at the same time, that live synchronisation is solving a real problem. If your mechanical design is mostly stable before layout starts, this feature isn't solving anything.
When Your Organisation Has Downstream PLM Systems
Large organisations have PLM systems. They have structured BOM workflows that feed procurement, manufacturing planning, and compliance. If you are responsible for a hardware team inside an organisation running Siemens Teamcenter, PTC Windchill, Arena, or similar, your design tool needs to connect to that infrastructure. The integration story for that environment assumes a commercial EDA platform, and Altium's enterprise integrations exist, are maintained, and are part of what the enterprise tier is priced around.
If your organisation is large enough to have this problem, it probably already has the Altium licences. The question in that environment is whether the number of seats and the licence tier are proportionate to actual usage.
When Tool Qualification Is an Audit Requirement
Altium is commercially supported software with a support contract, an SLA, and a vendor whose revenue depends on keeping it working. KiCad is well-maintained open source software. It is not commercially supported.
For most teams, most of the time, this is a theoretical concern. If you are in a regulated industry, medical devices, aerospace, automotive, where tool qualification documentation needs to include vendor support commitments and traceable software releases with formal validation, that theoretical concern becomes a concrete audit question. Know before you are in the room.
The Honest Summary
Pay for Altium when constraint-managed high-speed design genuinely requires the tool to enforce timing margins you cannot manage manually. Pay for it when library governance at your team size is cheaper to buy than to build. Pay for it when your ECAD and MCAD teams are co-designing in a tight iterative loop on geometry-constrained products. Pay for it when your organisation's PLM or compliance infrastructure requires a commercially supported platform.
In all other cases, you are paying for capability you don't use, on every seat, every year. A tool is not better because it is more expensive. It is better when it fits the purpose.
What We Covered in This Series
- I Ditched Altium. Here's What Happened. — The case for questioning the default
- KiCad Myth-Busting — Separating outdated reputation from current reality
- The £0 Hardware Stack That Gets You to Production — How the tools connect, end to end
- When Should You Actually Pay for Altium? — This article
CADPreview is a web-based viewer for KiCad projects hosted on GitHub, built for teams who want design visibility without the overhead. Connect your GitHub repo once, share a link, and your whole team sees the current design in a browser, without installing anything.