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Quick answer
Causely is a causal reasoning engine that works out which failure caused the others. RubixKube is an AI SRE across Kubernetes, AWS, Google Cloud, Azure, Linux machines and the tools you already use, with a root cause analysis and checked evidence for every incident, and fixes you approve.
Pick Causely if you want a causal engine for your own agents to call. Pick RubixKube if you want one AI SRE across everything you run, and want to start free today.
What is Causely?
Causely is a causal reasoning engine that works out which failure caused the others.
- Where it works: Kubernetes, ECS, VMs and bare metal, reading OpenTelemetry, Prometheus and Datadog.
- How you get it: Self-serve, 30-day trial.
- Pricing: Professional $2,000 a month for up to 500 services, Enterprise custom.
- Changes: Remediation through its MCP server.
- Where you use it: MCP, Slack, web.
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 and checking quotes in code against what the tools returned.
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 and no approval.
- Pricing: Individual is free (1 environment, 10 investigations a month), Business is $999 a month, Enterprise is custom. See pricing.
How they differ
Causely vs RubixKube
| Causely | RubixKube | |
|---|---|---|
| What it is | A causal reasoning engine that works out which failure caused the others | An AI SRE across your infrastructure and tools |
| Where it works | Kubernetes, ECS, VMs and bare metal, reading OpenTelemetry, Prometheus and Datadog | Kubernetes, AWS, Google Cloud, Azure, Linux machines, plus Datadog, PagerDuty, Grafana, Sentry and more |
| Its own observers | Partly, eBPF components | Yes, read-only |
| How you get it | Self-serve, 30-day trial | Sign up today, free plan |
| Pricing | Professional $2,000 a month for up to 500 services, Enterprise custom | Free, Business $999 a month, Enterprise custom |
| Changes | Remediation through its MCP server | Observe, Assist or Auto, your choice |
| Where you use it | MCP, Slack, web | Console, Slack, CLI, MCP |
Prices as listed on each vendor's site in November 2026.
When Causely is the right choice
- You want a causal engine for your own agents to call
- You have hundreds of services and OpenTelemetry in place
When RubixKube is the right choice
- You run on more than one platform: Kubernetes, clouds and Linux machines
- Your alerts come from several tools, and you want an alert storm grouped into one incident
- You want every root cause to show exactly what it read
- You want to set how much the AI may change, from read only to automatic
- You want to start today, on a free plan, with a price you can see
Using RubixKube with what you have
RubixKube is the whole AI SRE: observers, triage and grouping, an RCA for every incident, Tasks with checks, approvals and memory. It also works with your own AI tools over MCP.
Bottom line
Causely is best for teams that want a causal engine for their own agents. RubixKube is the AI SRE for every place your systems run. Start free, or see the best AI SRE tools in 2026 and what an AI SRE is.
Frequently asked questions
Is Causely the same as RubixKube?
No. Causely is a causal reasoning engine that works out which failure caused the others. RubixKube is an AI SRE with its own read-only observers across Kubernetes, clouds and Linux machines, alert grouping across your tools, and an RCA with checked evidence for every incident.
How much does Causely cost?
As listed on its site in November 2026: Professional $2,000 a month for up to 500 services, Enterprise custom. RubixKube is free on the Individual plan, and Business is $999 a month.
Can I use Causely and RubixKube together?
RubixKube is the whole AI SRE: observers, triage and grouping, an RCA for every incident, Tasks with checks, approvals and memory.
Can I try RubixKube for free?
Yes. Sign up and connect your first environment on the free Individual plan, with 10 investigations a month. It starts in Observe mode, which only reads.