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Quick answer
PagerDuty is an incident response platform: it pages the right people, coordinates the response, and its SRE agent, Paige, helps inside PagerDuty. RubixKube is an AI SRE: it watches your Kubernetes clusters, clouds and machines, groups the alerts, and writes a root cause analysis with evidence for every incident.
They do different jobs and work well together: PagerDuty incidents flow into RubixKube, and Rubix investigates each one.
What is PagerDuty?
PagerDuty's SRE agent, Paige, works inside the PagerDuty platform. It brings in the right people and agents for an incident and runs fixes through approved automation, waiting for your approval unless you let it act. It takes events from PagerDuty's many integrations rather than watching your infrastructure itself.
- How you get it: self-serve, with a free incident management plan for up to 5 users.
- Pricing: Paige is an add-on to Professional and included in the platform plans, from $2,800 a year.
- Best for: teams standardised on PagerDuty. See RubixKube vs PagerDuty.
What is RubixKube?
RubixKube runs read-only observers in your Kubernetes clusters, AWS, Google Cloud and Azure accounts and Linux machines, and takes alerts from Datadog, PagerDuty, Grafana, Sentry and other tools by webhook. It groups related alerts into one incident, and its agent, Rubix, writes a root cause analysis for each one, citing the tool output behind every step. Quotes are checked in code against what the tools returned, so you can see exactly what Rubix read.
Every RCA proposes a Fix and Follow-ups. Rubix opens the change as a pull request or through any tool you connect, and you choose how much it may do: Observe only reads, Assist asks before every change, Auto asks before anything destructive. It remembers past incidents and fixes, and works in the console, Slack, the CLI and your own AI tools over MCP.
- How you get it: sign up and start today. No demo, no approval.
- Pricing: Individual is free (1 environment, 10 investigations a month). Business is $999 a month. Enterprise is custom. See pricing.
- Best for: teams that run on more than one platform and want an AI SRE they can try on their own systems this afternoon.
How they differ
PagerDuty vs RubixKube
| PagerDuty | RubixKube | |
|---|---|---|
| Main job | Paging, on-call and incident coordination | Finding the root cause and proposing the fix |
| Where signals come from | Events from your monitoring tools | Its own observers, plus your alerting tools including PagerDuty |
| AI | Paige, the SRE agent, inside PagerDuty | Rubix investigates every incident into an RCA with evidence |
| Changes | Approved automation and runbooks | Observe, Assist or Auto, through any tool you connect |
| Where you use it | PagerDuty web and mobile, Slack, Teams, MCP | Console, Slack, CLI and MCP |
| Pricing | Free plan, Professional per user, platform plans from $2,800 a year | Free plan, Business $999 a month, Enterprise custom |
Using PagerDuty with RubixKube
Connect PagerDuty with a webhook, and every triggered or reopened PagerDuty incident opens an incident in RubixKube. A resolved one resolves it. P1 becomes critical and P2 high. Rubix investigates, groups it with related alerts from your other tools, and the RCA is waiting when your engineer opens the page. The connection is one way: RubixKube never acknowledges or resolves anything in PagerDuty. See PagerDuty in the docs.
When PagerDuty is the right choice
- You need paging, schedules and escalation across many teams
- You want incident coordination, status pages and stakeholder updates in one place
When RubixKube is the right choice
- Your engineers lose the first part of every incident finding out what broke and why
- You want one RCA for an alert storm, not one page per alert
- You want the root cause with evidence before anyone opens a laptop
For on-call and paging from RubixKube itself, see Hubble.
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Frequently asked questions
Does RubixKube replace PagerDuty?
No. PagerDuty pages people. RubixKube finds the cause. Connect PagerDuty, and every incident it raises gets investigated in RubixKube.
Is PagerDuty's SRE agent the same as RubixKube?
No. Paige works inside PagerDuty on the events PagerDuty receives. RubixKube watches your infrastructure with its own observers, groups alerts from every tool, and writes an RCA with evidence for each incident.
Can I use both?
Yes, and it is the common setup. PagerDuty for paging, RubixKube for the root cause.