Altium: the Sydney PCB software maker that became a global standard

Ask an electronics engineer anywhere from Shenzhen to San Jose what software they use to lay out a circuit board, and there's a fair chance the answer is Altium Designer. That's the quiet trick of this business: most Australians have never heard of it, yet it became one of the default tools of the global electronics industry, running on hundreds of thousands of engineers' desktops before Japan's Renesas Electronics bought the whole company in 2024 for roughly US$5.9 billion. I've been tracking Altium's numbers for years, on and off, mostly because it's one of the few local tech stories where the product itself — not the marketing, not the funding round — did the heavy lifting.

This is a company that started in a spare room in Tasmania in 1985, moved its listing between the ASX and the London Stock Exchange more than once, relocated its executive base to San Diego, and eventually became the kind of asset a Japanese semiconductor giant felt it had to own outright rather than compete against. It's a good story. It's also, I'd argue, a slightly under-told one relative to the Afterpays and Canvas of the world, mostly because printed circuit boards don't photograph well for a magazine cover.

From Tasmania to a global electronics-design standard

Altium's origins trace to Nick Martin, who founded the business in Hobart in the mid-1980s under the name Protel, building software that let engineers design printed circuit boards on a personal computer rather than on a drafting board. PCB design at the time was a specialist, expensive discipline. Protel's bet was that as PCs got cheaper and more capable, a smaller engineering team — or even a single contractor — should be able to do sophisticated board layout without a mainframe or a dedicated CAD department.

That bet paid off steadily rather than explosively. The company rebranded to Altium in the early 2000s as it broadened beyond board layout into a fuller electronics-design platform, and it listed on the Australian Securities Exchange, later adding a London listing as it chased a more specialist, comparably-valued cohort of investors overseas. Anyone who has followed Carsales' history or SEEK's expansion into Asia will recognise the pattern: an Australian company builds a genuinely useful product domestically, then discovers its real addressable market was never Australia to begin with.

Why engineers actually switched to Altium Designer

The honest answer, from talking to engineers who've used the software, is inertia-breaking convenience. Altium Designer bundled schematic capture, PCB layout, and increasingly simulation and manufacturing hand-off into one integrated environment, at a price point and licensing model that smaller design shops and contract engineers could stomach, where the legacy incumbents — Cadence's Allegro, Siemens' (formerly Mentor Graphics) tools — were historically built for large in-house teams with correspondingly large budgets.

That's a genuinely contrarian point worth making: Altium didn't win by being the most powerful tool in the room. For years, serious high-speed digital designers doing the most demanding boards often preferred the entrenched enterprise platforms. Altium won the middle and the long tail — the university labs, the start-ups, the contract designers, the mid-sized electronics manufacturers who needed something capable, learnable, and not tied to a six-figure enterprise licence. Over three decades that long tail became enormous, because the number of people designing electronics grew far faster than the number of people designing electronics for aerospace primes.

Building a moat out of switching costs

Software moats in engineering tools are boring to describe and brutally effective in practice: once an engineering team has trained staff, built libraries of component footprints, and standardised its internal workflow around a platform, ripping it out is expensive and risky, even if a rival tool is marginally better on paper. Altium leaned into this by extending into adjacent layers — component libraries, cloud collaboration tools under the Altium 365 platform, and later manufacturing and supply-chain features that tied the design file more tightly to the physical build process.

By the 2020s Altium was reporting revenue in the hundreds of millions of US dollars annually, with subscription-style recurring revenue making up the bulk of it, a structural shift that made the business considerably more predictable — and more attractive to a strategic acquirer — than the perpetual-licence model most CAD vendors started with. The company's own investor materials and ASX filings through this period consistently emphasised subscriber growth and net revenue retention rather than one-off licence sales, which is the tell of a company that has successfully converted itself into infrastructure.

The Renesas deal and what it says about the industry

Renesas is a major semiconductor manufacturer, and its interest in Altium wasn't nostalgic. Chip companies have been buying up the software layer that sits around their silicon for years, on the logic that if you control the design tool, you shape how engineers choose components, and you shorten the distance between "I need a chip" and "I've specified your chip." Cadence and Siemens have both made comparable moves in adjacent categories. Renesas' acquisition of Altium, announced in 2024 and valued at around US$5.9 billion, was reported at the time as one of the largest acquisitions of an Australian-founded technology company by a non-US or European buyer, and it closed after the standard run of international regulatory clearances.

For long-time holders of the ASX-listed stock, the return was substantial — Altium had compounded for the better part of two decades before the deal, and the takeover premium capped off a run that most local tech investors quietly wish they'd backed earlier. I'd note, though, that this is also where the "quiet Australian success story" narrative gets a little more complicated: Altium's operational centre of gravity had shifted to San Diego years before the sale, its shareholder base was heavily international, and the final deal was done in yen and US dollars, not Australian ones. It's an Australian-founded company more than it is, by the end, an Australian company. That distinction matters if you're trying to draw lessons for the next Altium — the "founded here, headquartered elsewhere, sold to a foreign strategic buyer" path is arguably the realistic outcome for a lot of our most successful tech exports, not a failure mode.

What the Altium story tells us about backing Australian tech

Altium never had the front-page drama of Afterpay's rise or the network-effect land-grab of REA Group's property monopoly. It grew in a niche most people can't picture, serving customers who mostly don't want to be famous either. But the fundamentals — recurring revenue, genuine switching costs, a product that solved a real workflow problem better than the alternative at a price the market would actually pay — are the same fundamentals behind every durable software business, in Australia or anywhere else. The lesson I keep coming back to is that "boring and essential" beats "exciting and optional" almost every time in enterprise software, and Altium is about as clean a case study as this country has produced. If you want the wider pattern of Australian companies that built something genuinely global rather than just genuinely loud, the Outliers & Global Empires hub has the rest of the list.

Whether Renesas gets the return it's paying for remains an open question, and not one I'd bet the house on either way — semiconductor companies buying software assets have a mixed record of actually integrating them well. But for Altium's founders, its long-serving engineers, and the shareholders who held on through several ASX cycles, the number that matters is already locked in.