The whole board, in one tool.

Altium Designer is a commercial electronic design automation (EDA) package that takes a printed circuit board from blank page to manufacturing release inside a single environment. Schematic capture, component libraries, board layout, routing, 3D mechanical clearance, documentation, and supply-chain data are not separate tools you stitch together — they are panels in one application backed by one unified data model. Altium describes it, fairly, as the tool of choice for PCB designers worldwide.

That "all in one intuitive interface and unified data model" framing is the whole pitch. In a fragmented open-source flow you draw a schematic in one program, push a netlist into a layout program, and manage parts in a spreadsheet. Altium collapses that into a continuous flow where a change to the schematic, the layout, and the bill of materials stays in sync because they're views of the same underlying design. For a professional doing this full-time, that coherence is what's worth paying for.

The honest reason teams pay for Altium isn't that the open-source tools can't draw a schematic — KiCad does that very well. It's the long tail of professional work where a free flow makes you assemble your own answer: managed component libraries with lifecycle and pricing data, a release process that produces a traceable manufacturing package, multi-engineer collaboration on the same board, and high-speed features that are first-class rather than bolted on. Altium ships those as one product with one support contract, and for a team shipping hardware on a schedule, the integration is the value.

The trade is blunt. Altium asks for a recurring per-seat subscription in US dollars; the open flow asks for nothing but your time gluing tools together. Whether the integration is worth the licence depends entirely on how much hardware you ship, how fast, and how exotic. A product team doing controlled-impedance, rigid-flex, and managed BOMs every week recovers the cost easily. A solo maker doing one board a quarter almost never does.

The supply-chain layer is ActiveBOM, a live bill of materials that enriches every part with real-time pricing, availability, and lifecycle status. It connects to hundreds of suppliers through Octopart and partner data feeds (IHS Markit, SiliconExpert, Z2Data), so you can catch a component heading for obsolescence or out of stock while you're designing, not after the board is at the fab. Choosing a part is no longer a separate spreadsheet exercise — it's part of the schematic.

For high-speed and RF work, the high-speed features are first-class. xSignals let you define a signal path between two nodes — including across series components or branched routing — so length and delay rules apply to the path that physically matters. Length and delay tuning insert accordion patterns to match critical net and differential-pair lengths so timing-critical signals arrive together. Differential pair routing and controlled-impedance routing are interactive, driven by an object-based constraint editor that ties rules to nets and design objects. For mechanically demanding boards, Altium handles HDI and rigid-flex layouts and even non-planar 3D-MID designs.

The platform spans version control and change tracking built specifically for electronics, a shared Workspace for managed component libraries and design data, requirements traceability linked back to the schematic and PCB, and release packages that carry a design through to manufacturing. It folds in the supply-chain intelligence that powers ActiveBOM and supports MCAD co-design, keeping the board in step with mechanical CAD tools like Fusion and SolidWorks so the electrical and mechanical sides don't drift apart. On the compliance side Altium 365 carries SOC 2 Type 2, CMMC Level 1, and GDPR, with AES 256-bit encryption and a zero-trust architecture — the box-ticking enterprise procurement asks for.

The naming has churned, which is worth flagging because the old terms still appear in the wild. The on-prem and managed-workspace pieces previously sold as Concord Pro and the enterprise NEXUS line have been consolidated under the Altium 365 umbrella. And the corporate picture changed in 2024: Renesas completed its acquisition of Altium on 1 August 2024 (announced February 2024, A$68.50 per share). The two have since previewed Renesas 365, Powered by Altium, a broader silicon-to-system platform built on Altium 365 — aimed at software-defined products and slated to arrive in 2026. Altium Designer and Altium 365 remain the products you actually buy today.

For a South African team, the per-seat subscription priced in US dollars is a genuine barrier — not a rounding error. Every seat carries forex exposure that compounds as the rand moves, and a tool billed annually in dollars is a fixed cost that has to be earned back in rand-denominated work before it's justified. For a small Johannesburg or Cape Town shop, that maths often doesn't close: the licence for a handful of seats can rival a junior engineer's salary, and the open path costs nothing in licence fees at all.

So the local default leans toward KiCad, optionally with Diode for the code-defined workflow — a zero-licence-cost route from idea to manufacturable board, with Gerbers that ship to a fab abroad regardless of which tool drew them. Altium still wins in specific cases: when a client or OEM mandates it for design hand-off, when the work is genuinely high-speed or rigid-flex and the free flow would cost more engineer-hours than the licence costs in dollars, or when a team is large enough that managed data via Altium 365 saves more than it costs. Outside those, the rand maths usually points back to the open path — and that's an honest recommendation, not a grudging one.