The lightweight alternative to a six-figure SIEM

You may have priced Splunk, Sentinel or QRadar for your Windows servers and decided the numbers didn’t work. The need for monitoring is still there. If you’re under a compliance framework, it still requires log monitoring, and your servers keep writing thousands of security events that nobody reviews.

Enterprise SIEMs generally charge per GB of ingestion and are designed around having dedicated security staff to configure and maintain them. For two people looking after 20 servers, that is very hard to justify. Arden runs its detection on hardware you already own. Its pricing hasn’t been announced yet, but it will be a flat monthly rate based on the size of your environment, with no per-GB ingest fees.

What a small team actually needs

At its core, a SIEM collects logs, runs detection rules against them and shows the results in a dashboard. With the large products, the cost of that includes ingestion billed by the gigabyte, agents on each endpoint, a cloud subscription and usually a professional services engagement to set it up. Most SMBs end up paying $500 to $5,000 per month, and many still have rules that were never tuned and alerts nobody checks.

Arden concentrates on the detection part and runs it on hardware you already own. It is a single Windows executable that reads your event logs directly, checks them against rules for attack techniques seen in real breaches, and serves a dashboard on the local machine. It detects many common attack patterns, not all of them, and it only raises alerts; it doesn’t block anything. If you want to monitor more than one host, you add agents, which send their logs only to your Arden server.

What Arden includes

The Standalone tier runs on one machine and analyzes that machine’s event logs. A scan gives you a prioritized list of findings, each with a short explanation of what the alert means and what to look at next. You can also import event logs exported from other machines, export findings for your records, and suppress false positives so they don’t show up in later scans.

The Network tier brings multiple Windows machines into one dashboard. You scan the network for hosts, deploy agents to the ones you want to monitor, and review alerts from all of them in one place. The detection engine is the same as in Standalone; it just works on logs from more machines.

Arden doesn’t replace CrowdStrike or Sentinel. Between them, those products cover things Arden doesn’t, such as real-time endpoint protection, cloud telemetry and managed threat hunting. But many small businesses currently have no log monitoring at all, and for them, running detection rules against their own Windows logs is a large improvement over relying on antivirus alone.

For more detail on which events to watch, read our guide to the 5 Windows Event IDs every system administrator should monitor, learn how to spot lateral movement without a SOC, or see how hidden SIEM costs add up for small teams.