Company History
Start
2nd Feb, 2016
Exhibition Planning &
Exhibition Management
Exhibition Management
21st Jul, 2017
Growth internationallyfirst
half of the 2016s
half of the 2016s
19th Aug, 2018
The purpose of the business plan
2nd Jan, 2021
Focus business history on what
matters to planning
matters to planning
22nd Sep, 2025
History to Unite and Inspire People
12th Jan, 2016
Establishment of Mountain. We are a company built to last.
8th Jul, 2017
Registered as a Insurance company
18th Aug, 2018
Construction bought the Greek
company Delta
company Delta
27th Sep, 2020
For lean business plans, operational
plans, and strategic plans
plans, and strategic plans
8th Jul, 2023
Award winner
About AddSync – Powered by Mountain Professional LTD
Streamlining Business Scheduling Worldwide
AddSync is a premier provider of automated calendar synchronization solutions designed for modern enterprises, dynamic teams, and productivity-focused professionals. Our mission is simple yet transformative: to eliminate scheduling conflicts, prevent double bookings, and ensure seamless communication across diverse digital ecosystems. By bridging the gap between major platforms like Google Calendar, Microsoft Outlook, Exchange, and iCloud, we empower organizations to operate with precision and reliability.
Our Corporate Structure
AddSync is a flagship product operated by Mountain Professional LTD, a globally recognized technology holding company specializing in enterprise software solutions. Mountain Professional LTD provides the financial stability, legal framework, and strategic oversight necessary to deliver high-quality services to our international client base. This corporate structure ensures that AddSync adheres to strict governance standards, maintaining accountability and transparency in all business operations.
Global Presence & Local Expertise
While our technology connects users globally, our physical presence ensures localized support and compliance with regional regulations. Mountain Professional LTD maintains strategic offices in three key locations:
- United Kingdom (Headquarters): 28-29 The Broadway No. 1, London, Ealing, W5 2NP. This hub oversees global strategy and enterprise partnerships.
- Poland (Development Center): 87 Grzybowska, Warsaw, 00-844. Our technical team here drives innovation, API development, and infrastructure security.
- Panama (Operations): Piso 4 Oficina 5B, Calle 50, Edificio Frontenac. This location manages international client relations and global compliance.
This tri-continental footprint allows us to offer 24/7 support coverage and adhere to various international data protection standards.
Technology & Security Commitment
At AddSync, we understand that calendar data is sensitive. Our infrastructure is built on enterprise-grade security protocols, ensuring that your information remains protected at all times. We are fully compliant with GDPR and ISO 27001 standards, reflecting our dedication to data privacy and information security management.
Our synchronization engine operates with a 99.99% SLA, guaranteeing uptime reliability for critical business operations. We utilize end-to-end encryption for all data transfers, ensuring that meeting details, contacts, and tasks remain confidential between connected platforms. Whether you require one-way, two-way, or multi-directional sync, our technology adapts to your workflow without compromising performance.
Our Mission: Simplicity Without Compromise
We believe that technology should simplify work, not complicate it. Many businesses struggle with fragmented tools that do not communicate effectively. AddSync resolves this by creating a unified scheduling environment. Our development team continuously refines our algorithms to detect duplicates, manage time zone conversions accurately, and sync historical data seamlessly.
We are committed to continuous improvement. Our roadmap includes deeper integrations with CRM systems, advanced task management features, and enhanced API capabilities for developers building custom solutions. We listen to our users, incorporating feedback directly into our product updates to ensure we meet evolving business needs.
Why Partner With AddSync?
Choosing AddSync means choosing a partner dedicated to your operational efficiency. We offer more than just software; we provide peace of mind. Our support team is available during business hours (9:00–19:00 CEST) to assist with onboarding, troubleshooting, and configuration. With over 17,000 successful connections established, our track record speaks to our reliability.
We invite you to experience the next generation of calendar services. Whether you are a small team needing basic sync or a large enterprise requiring custom API integration, AddSync scales to meet your demands.
Contact Us
Ready to synchronize your workflow? Start your 14-day free trial today—no credit card required. For enterprise inquiries or technical support, please contact us directly.
- Email: info@add-sync.com | support@add-sync.com
- Phone: +44 77 00 183718
- Website: www.add-sync.com
Join thousands of professionals who trust AddSync and Mountain Professional LTD to keep their schedules aligned, secure, and efficient. Let us handle the synchronization so you can focus on what matters most—your business.
