UnderpassDocs

Reference

Limits

Every number you might run into, in one place.

Plans

PlanPeopleDevices
FreeUp to 6100
TeamUnlimited25 per person, pooled, at least 100
BusinessUnlimited50 per person, pooled, at least 250

Every feature is on every plan. See Plans and billing.

Machines

WhatLimit
Machine nameA DNS label: lowercase a-z, 0-9 and -, up to 63 characters
Key expiry180 days by default; 1 to 365, or off
Ephemeral machinesRemoved after 10 minutes offline
Counts as offline90 seconds without checking in

Access controls

WhatLimit
Rules (including SSH rules)200
Groups100, up to 500 members each
Tests100, up to 50 targets each
Sources and destinations per rule1 to 50

DNS

WhatLimit
Nameservers8
Split DNS domains32, with up to 4 servers each
Search domains16
Network name3 to 40 characters: lowercase letters, digits and -, no --

Services, routes and apps

WhatLimit
Ports per service1 to 16, TCP only
Services per host64
Subnet routes per machine64, IPv4 only
Domains per app1 to 50
Routed addresses per app connector, per app512

Keys and tokens

WhatLimit
Auth key lifetime1 to 90 days; 7 by default in the dashboard, 90 through the API
API token lifetimeUp to 90 days (the default)
API tokens per workspace50

Logs and webhooks

WhatLimit
Audit log retention90 days
Network log retention30 days
Webhooks and log streams10 of each per workspace
A destination is paused after20 failed deliveries in a row

HTTPS certificates

WhatLimit
New certificates per machine1 per hour, unless the current one is due
Renewal30 days before expiry

Relay

WhatLimit
Throughput per device2 MiB/s, 4 MiB bursts
Connections per IP address32