System Design AI

Designs

Pick a system. Work through the problem. Compare your approach.

Create your own

Classic designs 1

Ordered by design number

Company tags are community-reported. Counts on cards show how many people reported that design.

DenylistClear filters

86. Design an IP and URL Denylist
Deny requests by caller address, range or URL at a global edge, with lists from governments, threat feeds and detection reaching 300 proxies in seconds.
ClassicMedium
Security AWS Bloom filter
+3
CIDR Denylist Edge
Worked design
Practice

Each design brings together the brief, practice, examples and discussion.