While the smart glasses industry debates cameras, AI assistants and privacy bans, a French company has been quietly solving a much simpler problem: how do you check your heart rate mid-race without breaking your stride?
ENGO Eyewear, based in Grenoble, has just raised €5.1 million to expand its AR sports glasses business — and the funding signals that purpose-built AR for athletes is a genuinely viable commercial category, even as the consumer giants are still figuring theirs out.
What ENGO makes
ENGO develops AR smart glasses for runners, cyclists, triathletes, and other endurance athletes. Its eyewear integrates a Micro-OLED display that projects live performance data into the wearer’s field of view without requiring athletes to look away.
The company’s latest device, the engo3 AR sports glasses, launched earlier this year with Garmin and Apple Watch support. The glasses feature a colour-coded heads-up display that presents metrics including heart rate, pace, and power in red-to-green zones, weigh 38.5 grams, and provide more than 20 hours of battery life.
The colour-coding is the design detail worth noting. Rather than showing a number the athlete has to interpret mid-effort, the display shifts from red to green as metrics move in and out of target zones — reducing the cognitive load to a glance rather than a calculation. For an athlete at threshold pace with a heart rate climbing, that difference matters.
The funding round
The €5.1 million round was backed by Ventech, ODYSSEE Venture, and Bpifrance Amorçage Industriel. The funding will support ENGO’s international industrial and commercial expansion, recruitment in France, and further research and development for its lightweight augmented reality eyewear. The company plans to hire 20 people in France across key engineering, software, data, and business development roles.
ENGO designs and assembles its products in France and currently generates 90% of its revenue outside the country — a notable figure that suggests strong international demand for a product that most people outside the endurance sports community have never heard of. The new capital will be used to formalise that international presence rather than simply continuing to export from France.
The roadmap
According to ENGO’s backers, the new funding will also be used to increase research and development around display miniaturisation, optics, embedded display technologies, new features, and further reductions in product weight.
At 38.5 grams the engo3 is already among the lightest AR glasses on the market — lighter than Even Realities’ G2 at 35 grams is its nearest comparable, though the two serve entirely different use cases. The direction of travel is clear: smaller, lighter, longer battery, more data sources.
Eric Marcellin-Dibon, CEO of ENGO, said: “Since ENGO’s inception, we have pursued a simple vision: enabling athletes to stay focused on their performance, not the technology. The lighter, more natural, and more intuitive our eyewear becomes, the closer we get to our goal: making the technology disappear in favour of the athletic experience.”
Why it matters beyond sport
ENGO’s funding round is a small data point in a larger argument: that the most durable AR use cases are the ones solving a specific, concrete problem rather than trying to replace the smartphone entirely.
A cyclist who no longer needs to glance at their wrist computer, a runner who can check their pace without breaking form, a triathlete managing three disciplines worth of data simultaneously — these are real problems with measurable solutions. The AR display is the tool, not the product.
That is a meaningfully different pitch from the AI assistant glasses race currently being run by Meta, Samsung and Google. Both can be true at once. But ENGO’s 90% international revenue suggests the specific-problem approach is generating commercial traction well ahead of the general-purpose one.