Defence tech’s circuit is thin at the top and built out below it: only one show clears Tier A, but three Tier B events give the vertical real depth once you look past the biggest room.
1Rank
Secure communications, threat intelligence 16 Nov 2026, Rennes 8,500 attendees
A cybersecurity and defence conference with strong secure-communications and threat-intelligence programming, shared with the cybersecurity vertical.
Why it is hereThe single largest defence-adjacent audience on the circuit, though the room is shared with civilian cybersecurity.
2Rank
Aerospace components, autonomous systems 19 May 2026, Seville 1,500 attendees
A B2B meetings-format event connecting aerospace and defence suppliers with manufacturers and primes.
Why it is hereBest structured access to procurement and supply-chain buyers, via scheduled meetings rather than a trade-floor format.
3Rank
Autonomous systems, defence AI, counter-drone 20 Aug 2026, Neuhardenberg 1,000 attendees
A festival-format event held on a former airfield, focused on drones, autonomous systems and defence AI demonstrations.
Why it is hereThe most founder- and demo-friendly format on the list, with live flight and field testing.
4Rank
C4ISR, battlefield software, threat intelligence 26 May 2026, Tallinn 800 attendees
NATO CCDCOE's flagship cyber conflict conference, covering the intersection of cybersecurity and defence.
Why it is hereThe strongest NATO and policy-facing audience on the circuit.
5Rank
C4ISR, defence AI 11 Feb 2027, Munich 400 attendees
A smaller innovation summit focused on defence AI and command-and-control software.
Why it is hereThe most accessible room for early-stage defence-AI startups specifically.
Two of these events (European Cyber Week, CyCon) are shared with the cybersecurity vertical, reflecting how much of European defence tech sits at the cyber-physical boundary rather than in dedicated hardware.
Which is the biggest defence tech event in Europe?
European Cyber Week in Rennes, at 8,500 attendees, though it is shared programming with the cybersecurity vertical rather than a dedicated defence-hardware show.
Is there a dedicated defence-tech tradeshow in Europe, separate from cybersecurity?
Not yet at Tier A scale – the closest is Aerospace & Defense Meetings Sevilla, a B2B meetings-format event for the aerospace and defence supply chain.