FIM

Runs on Linux, Mac, Windows.

FIM is ranked #12 of 29 in file integrity monitoring software on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

FIM plans and pricing

FIM Free Free open-source software; no usage limits stated achiefs.com · 4 Oct 2026

Purpose: FIM monitors file system changes in the background and keeps historical data about files.
Integrity checks: FIM automatically generates file hashes and analyzes file changes.
Event details: Using the Linux Audit daemon, FIM can identify who caused an event and which command produced it.
Change types: FIM can identify changes to file content, attributes, ownership, and permissions.
Integrations: The documentation lists Elasticsearch 8.x or OpenSearch 2.x and Splunk indexer 9.x, and says only one integration can be active at a time.
Event destinations: Events can be written to a local file, sent over the network, or sent to both destinations.
Security configuration: The indexer endpoint's HTTPS certificate trust setting defaults to false for the insecure option.
Supported systems: The installation guide lists Ubuntu Xenial or later, CentOS 7 or later, Windows 7 or Windows Server 2016 or later, and macOS Big Sur or later.
Requirements: Minimum requirements are 1 CPU core, 128 MB memory, and 1 GB storage, with storage use increasing over time.
Support: Achiefs invites users to contact [email protected] and says help is free.
Open source: The maker describes FIM as completely free open-source software.
Who it is for: The maker says it aims to provide file monitoring to secure endpoints around the world.
Price from: Free

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