DSEI 2027 London: Defence Exhibition Guide & Attendee List
By Ilyas Kerbal,
DSEI (Defence and Security Equipment International) is a world-leading defence and security event, held at ExCeL London every odd year. The 2025 edition set records with around 1,700 exhibitors from 62 countries, about 60,000 visitors and roughly 170 official delegations. DSEI 2027 runs from 7 to 10 September 2027, Tuesday to Friday.
With European defence budgets rising and strong UK government backing, DSEI is a key meeting point between primes, SMEs and government procurement.
DSEI 2027 at a glance
| Detail | Information |
|---|---|
| Industry | Defence & security |
| Venue | ExCeL London, Royal Victoria Dock |
| City and country | London, UK |
| Next edition | 7–10 September 2027 (Tue–Fri) |
| Frequency | Biennial (odd years) |
| Does it move? | No. Always London, odd years (DSEI Japan runs separately). |
| Scale | ~1,700 exhibitors from 62 countries; ~60,000 visitors (record); ~170 official delegations (2025) |
| Organiser | Clarion Defence and Security (with UK MoD support) |
| Typical ticket price | Free for vetted, qualified defence and security professionals |
| Event app / platform | DSEI app (meetings, agenda) |
| Website | dsei.co.uk |
What DSEI covers
DSEI covers every domain:
- Land, naval and air defence systems
- Space and cyber
- Security and resilience
- The defence supply chain and SMEs
- Training and simulation
Live waterborne displays take place in the dock next to ExCeL.
Where it takes place
DSEI is held at ExCeL London in the Docklands and does not move. DSEI Japan is a separate event in Tokyo. Protests outside the venue are frequent, so allow extra time.
Who attends DSEI
| Audience | Interest | Relevance |
|---|---|---|
| Defence ministries and procurement agencies | Programmes | Final buyers |
| Armed forces | Capability | Users |
| Prime contractors and supply-chain buyers | Subcontractors | Targets for SMEs |
| Official delegations (around 170) | Cooperation and exports | International buyers |
Only vetted professionals can attend.
Main entrance of ExCeL London. Photo: Senseiich, CC BY-SA 3.0, via Wikimedia Commons.
Preparing for DSEI 2027? I build enriched DSEI exhibitor and partner lists by domain and country, with company size, role and LinkedIn data from public sources, ready for your CRM. Request your DSEI list.
Registration
Visitor registration has been free for qualified defence and security professionals, subject to vetting (based on past editions).
The DSEI app
DSEI provides an official app with the exhibitor list, programme and meeting tools. Good on site, but it has no export and doesn’t show which procurement teams are attending.
How to prospect DSEI
- Segment exhibitors by domain: land, naval, air, space, cyber.
- Map primes and their supply chains, especially UK and NATO suppliers.
- Identify business-development and supply-chain contacts.
- Check export-control rules for international outreach.
- Pair DSEI with Eurosatory in even years for continuity.
Pros and cons
| Pros | Cons |
|---|---|
| Strong UK and NATO government presence | Biennial |
| Growing defence market | Vetting and security procedures |
| All domains in one event | Frequent protests outside the venue |
Frequently asked questions
When is DSEI 2027?
From 7 to 10 September 2027 at ExCeL London.
Is DSEI free to attend?
Registration has been free for qualified, vetted defence and security professionals.
Who organises DSEI?
Clarion Defence and Security, with UK Ministry of Defence support.
Can I get the DSEI exhibitor list?
The app lists exhibitors without exportable contacts. An enriched list adds company data and business-development contacts from public sources.
Plan for DSEI 2027
Defence partnerships take time to build. For an enriched DSEI list, reach out via the Prospector home page.
Related event guides
- Eurosatory 2028 Paris: Defence Exhibition Guide & List
- Milipol Paris 2027: Homeland Security Event Guide & List
- Farnborough Airshow 2028: Aerospace Guide & Attendee List
Sources
Image credits
- Cover image: Photo: Swadim, CC BY-SA 4.0, via Wikimedia Commons. Tempest combat aircraft model at DSEI 2019, ExCeL London.
- In-article image: Photo: Senseiich, CC BY-SA 3.0, via Wikimedia Commons. Main entrance of ExCeL London.
