An access control platform, or PACS, outlives most of the hardware around it and touches every door in a building. Choosing one is a decision about architecture and credentials first, and features second. Here is how to work through it.
Architecture and scale
Start with how the system is built. Is it a single-site controller, an enterprise server platform, or a cloud service? Match the architecture to the client: a small site does not need enterprise licensing, and a multi-site portfolio needs central management and clean failover. Confirm how the platform handles many sites, many doors, and offline operation when a controller loses its link to the head end.
Readers and credentials
The reader and credential choice sets the security floor. Legacy 125 kHz prox is easy to clone and should be avoided on new work. Favour 13.56 MHz smart credentials, mobile credentials, or biometrics where they fit. The reader technology comparison lays out the trade-offs on security, cost, and fit.
OSDP and Secure Channel
Specify OSDP rather than Wiegand for the reader-to-controller link, and require OSDP Secure Channel so the connection is encrypted and supervised. This closes gaps that Wiegand cannot, and it is now the default worth writing into a spec. OSDP is maintained by the Security Industry Association.
Listings and standards
For equipment that has to meet code or insurance requirements, confirm the relevant listings. Access control units are covered by UL 294, and Canadian installations may reference ULC standards. Confirm the products in the design carry the listings the project requires.
Cloud or on-premises
Decide where the platform lives. Cloud access control removes on-site servers and simplifies multi-site management, at the cost of depending on the internet link and the provider’s security. On-premises keeps control local. Either way, ask about data residency for Canadian and public-sector clients.
Integrations
Access control rarely stands alone. Confirm how the platform integrates with video, intrusion, visitor management, and identity or HR systems, and whether those integrations are native or need middleware. Strong, supported integrations are worth more than a long list of logos.
Cybersecurity
The PACS is a network system holding identity data and controlling physical entry, which makes it a target. Ask about user roles, encryption, hardening guidance, patch cadence, and how the vendor handles vulnerability disclosure. Align the review with a recognized framework such as the NIST Cybersecurity Framework.
Shortlist and compare
Narrow the field, then compare finalists side by side. Browse platforms in the access control category and use the compare tool to line up architecture, origin, and verification before you specify.
References
Last updated 2026-07-08. Buyer guides are editorial and independent. No vendor pays for placement or mention.