Freedom251 › Log Management Software
AxoSyslog
What AxoSyslog is
AxoSyslog is free, open-source software for collecting, processing, and routing logs and observability data. It provides log pipelines, structured parsing, and archive export, with FilterX able to parse, filter, enrich, and reshape JSON, OpenTelemetry logs, and protocol buffers. Supported protocols include OpenTelemetry, legacy BSD syslog, RFC5424, and HTTP JSON delivery. Integrations include Splunk Cloud, Grafana Loki, Amazon S3, Azure Monitor, Microsoft Sentinel, Elastic, OpenSearch, ClickHouse, CrowdStrike, Google Pub/Sub, and BigQuery. AxoSyslog is a drop-in syslog-ng replacement using the same binaries, configuration files, syntax, and license practices. Persistent disk buffering preserves messages through outages and forwards them in received order after connectivity returns. It collects host and transfer metrics, supports custom labeled metrics, and uses TLS with X.509 authentication. Deployment is self-hosted on Linux or macOS through packages, containers, or Kubernetes Helm. It does not interpret message meaning or identify patterns across messages.
Who it suits
It suits teams running self-hosted log pipelines on Linux or macOS that need structured processing, buffering, protocol support, and integrations. Existing syslog-ng users may use its compatible binaries, configuration files, and syntax.
What it does well
- Free open-source software under GPL-3.0-or-later
- Drop-in syslog-ng replacement
- Persistent buffering during outages
- Supports many protocols and named integrations
- TLS and X.509 authentication
What to know first
- Does not analyze log meaning or cross-message patterns
- Self-hosted deployment required
- Windows collection uses a separate OpenTelemetry Collector distribution
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| AxoSyslog | Open-source software licensed under GPL-3.0-or-later | Free |
As axoflow.com lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
AxoSyslog focuses on collecting, transforming, buffering, and routing observability data with broad protocol and destination support. It is suited to self-hosted infrastructure, but it does not provide semantic log analysis or pattern recognition.
Facts from AxoSyslog's own pages
- Archive export
- Yes · axoflow.com, 23 Sept 2026
- Buffering
- Persistent disk buffering stores messages during server or network outages and forwards them in received order after connectivity returns. · axoflow.com, 11 Oct 2026
- Company
- Axoflow describes itself as a US-based cybersecurity startup with European origins and says it was founded in 2023. · axoflow.com, 11 Oct 2026
- Data processing
- FilterX parses, filters, enriches, and reshapes data including JSON, OpenTelemetry logs, and protocol buffers. · axoflow.com, 11 Oct 2026
- Deployment
- Installation options include Debian, Ubuntu, RHEL, Fedora, AlmaLinux, Docker, Podman, and Kubernetes via Helm. · axoflow.com, 11 Oct 2026
- Free plan
- Yes · axoflow.com, 23 Sept 2026
- Integrations
- Named integrations include Splunk Cloud, Grafana Loki, Amazon S3, Azure Monitor, Microsoft Sentinel, Elastic, OpenSearch, ClickHouse, CrowdStrike, Google Pub/Sub, and BigQuery. · axoflow.com, 11 Oct 2026
- License
- AxoSyslog version 4.12 and newer uses the GNU General Public License version 3 or later. · axoflow.com, 11 Oct 2026
- Limit
- AxoSyslog does not interpret or analyze the meaning of log messages or recognize patterns across messages. · axoflow.com, 11 Oct 2026
- Log pipelines
- Yes · axoflow.com, 23 Sept 2026
- Metrics
- It collects host and transfer metrics such as disk buffer usage, packet loss, and event delay, and can create custom labeled metrics from message fields. · axoflow.com, 11 Oct 2026
- Protocols
- It supports OpenTelemetry, legacy BSD syslog, RFC5424, and HTTP JSON data delivery. · axoflow.com, 11 Oct 2026
- Purpose
- AxoSyslog is an open-source security data processor for collecting, processing, and routing logs and observability data. · axoflow.com, 11 Oct 2026
- Security
- It supports TLS for encrypted communication and X.509 certificate authentication. · axoflow.com, 11 Oct 2026
- Structured log parsing
- Yes · axoflow.com, 23 Sept 2026
- Support
- Axoflow offers community and professional support, and professional services for load balancing, UDP loss, dropped messages, buffers, and scaling. · axoflow.com, 11 Oct 2026
- syslog-ng compatibility
- AxoSyslog is a drop-in syslog-ng replacement with the same binaries, configuration files, syntax, and license practices. · axoflow.com, 11 Oct 2026
- Windows collection
- Axoflow provides a custom OpenTelemetry Collector distribution to collect logs on Windows hosts and forward them to AxoSyslog. · axoflow.com, 11 Oct 2026
Where AxoSyslog stands on Freedom251
- Log Management Software#36 of 111