Equestrian
Initiative
Ask us before you decide
You do not have to register to talk to us. Send us your question about the standard, the Core Mandatory Layer, the Activity Modules, the audit or the cost, and a member of the SEI Team will reply by email. No commitment.
When you are ready
Certification starts whenever it suits your organisation. If after our answer you decide to move forward, you can register and the SEI Team will confirm the applicable Activity Module(s) and guide you through the next steps.
The future starts here
Stay connected with the future of equestrianism.
SEI
SEI — Sustainable Equestrian Initiative. An evidence-based sustainability certification standard created for the equestrian world, with horse wellbeing at its centre. Established 2023, The Netherlands.
SEI | Sustainable Equestrian Initiative
Address: Nicolaes Maestraat 2, Office 213
1506 LB Zaandam, The Netherlands
Telephone: 0031-(0)85-301 0650
Dutch Chamber of Commerce: 67691951
EU VAT (VIES): NL857133147B01
© 2026 Sustainable Equestrian Initiative. All rights reserved.
Responsible equestrianism. Proven for the future.