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Quick answer
Robusta is an AI SRE that groups alerts and investigates with HolmesGPT, acquired by Freshworks in October 2026. 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 Robusta if you are a Freshworks, Freshservice or FireHydrant customer. Pick RubixKube if you want one AI SRE across everything you run, and want to start free today.
What is Robusta?
Robusta is an AI SRE that groups alerts and investigates with HolmesGPT, acquired by Freshworks in October 2026.
- Where it works: Kubernetes and clouds, on top of your existing tools.
- How you get it: Demo.
- Pricing: Quote only.
- Changes: Read-only investigations.
- Where you use it: Slack, Teams, 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
Robusta vs RubixKube
| Robusta | RubixKube | |
|---|---|---|
| What it is | An AI SRE that groups alerts and investigates with HolmesGPT, acquired by Freshworks in October 2026 | An AI SRE across your infrastructure and tools |
| Where it works | Kubernetes and clouds, on top of your existing tools | Kubernetes, AWS, Google Cloud, Azure, Linux machines, plus Datadog, PagerDuty, Grafana, Sentry and more |
| Its own observers | Kubernetes agent | Yes, read-only |
| How you get it | Demo | Sign up today, free plan |
| Pricing | Quote only | Free, Business $999 a month, Enterprise custom |
| Changes | Read-only investigations | Observe, Assist or Auto, your choice |
| Where you use it | Slack, Teams, web | Console, Slack, CLI, MCP |
Prices as listed on each vendor's site in November 2026.
When Robusta is the right choice
- You are a Freshworks, Freshservice or FireHydrant customer
- You want HolmesGPT underneath
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
Robusta became part of Freshworks in October 2026. If you are looking at alternatives, RubixKube covers Kubernetes, clouds and Linux machines with its own observers, groups alerts, and writes an RCA with checked evidence for every incident, on a free plan you can start today.
Bottom line
Robusta is best for freshworks customers. 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 Robusta the same as RubixKube?
No. Robusta is an AI SRE that groups alerts and investigates with HolmesGPT, acquired by Freshworks in October 2026. 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 Robusta cost?
As listed on its site in November 2026: Quote only. RubixKube is free on the Individual plan, and Business is $999 a month.
Can I use Robusta and RubixKube together?
Yes. RubixKube reads the tools you already have and adds its own observers, so it can run next to Robusta while you compare them on your own incidents.
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.