Get in Touch
Speak with Our Sales Engineering Team
Whether you are looking to migrate from a legacy cold email tool, evaluate our multi-brand agency architecture, or book an architectural walk-through, our UK team is here to assist.
United Kingdom Headquarters
SiSender Technologies Ltd
100 Bishopsgate, City of London
London EC2N 4AG
United Kingdom
Direct Line: +44 20 7946 0912
Sales Engineering: sales@sisender.com
Security & Compliance: security@sisender.com
Sales Engineering: sales@sisender.com
Security & Compliance: security@sisender.com
Support & Response SLA
Our engineering team operates standard UK business hours with dedicated 24/7 monitoring for active dispatch queues.
Operating Hours: Monday – Friday, 08:30 – 18:00 BST
Target Initial Response: Under 4 business hours
Critical Incident SLA: Under 30 minutes (Enterprise Tier)
Target Initial Response: Under 4 business hours
Critical Incident SLA: Under 30 minutes (Enterprise Tier)