Amazon CloudWatch Logs vs Fluentd
Amazon CloudWatch Logs
aws.amazon.comFluentd
fluentd.orgSide by side
| Figure | Amazon CloudWatch Logs | Fluentd |
|---|---|---|
| Price from | $0.03/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | Yes | — |
| Self-hosted | — | Yes |
| Plans published | 5 | 1 |
| Spec score · Log Management Software | 9.2 (#5) | 8.5 (#26) |
| Archive export | Yes | Yes |
| Deployment options | cloud | self-hosted |
| Founded | 2006 | 2011 |
| Integrations | CloudWatch Logs integrates with Amazon OpenSearch Service for querying and analyzing logs without moving or duplicating the data. | Listed outputs include Elasticsearch and Kibana, Splunk, AWS S3, Kafka, BigQuery, Datadog, and OpenTelemetry. |
| Live Tail | Live Tail provides interactive real-time analysis of streaming log data from a central view. | Yes |
| Log pipelines | Yes | Yes |
| Purpose | Amazon CloudWatch collects and stores logs from AWS resources, applications, services, on-premises resources, and other clouds. | Fluentd is an open source data collector for a unified logging layer. |
| Security | CloudWatch Logs data is encrypted at rest and in transit, supports AWS KMS encryption for log groups, and is PCI and FedRAMP compliant. | The Fluentd homepage says vulnerabilities CVE-2026-44024, CVE-2026-44025, CVE-2026-44160, and CVE-2026-44161 were patched in Fluentd v1.19.3 and advises updating fluent-package to v6.0.4. |
| Structured log parsing | Yes | Yes |
| Support | The CloudWatch page directs users with questions to contact AWS. | The project lists community help and commercial support from companies offering Fluentd enterprise services. |
Plans
Amazon CloudWatch Logs
- Logs data ingestion$0.50 a month
- Logs archive storage$0.03 a month
- Pay-as-you-goPrice not published
- Free tierFree
- Paid usagePrice not published
In their own words
Amazon CloudWatch Logs
Amazon CloudWatch Logs collects and stores logs from AWS resources, applications, services, on-premises systems, and other clouds. It offers log pipelines, structured parsing, archive export, and live tailing through web and API access. Logs Insights lets users query records with filters, aggregations, and regular expressions, then visualize time-series data or export results to CloudWatch Dashboards. Logs are available in Standard for real-time monitoring and advanced analytics, or Infrequent Access for ad-hoc queries and forensic analysis. Live Tail provides a central interactive view of streaming logs, while anomaly detection uses machine learning to identify patterns and changes. Users can search and analyze logs across accounts from a monitoring account at no additional cost. The free tier includes 5 GB for ingestion, archive storage, and query scans, plus 1,800 Live Tail minutes per month. Usage-based charges are billed at month end, with no upfront commitment or minimum fee; rates vary by Region.
Fluentd
Fluentd is a free, open-source data collector for creating a unified logging layer. It uses JSON to handle log collection, filtering, buffering, and output across sources and destinations. More than 500 community plugins connect it to data sources and outputs, including Elasticsearch and Kibana, Splunk, AWS S3, Kafka, BigQuery, Datadog, and OpenTelemetry. It supports memory and file buffering, failover, and high availability to help prevent data loss between nodes. The project reports that a vanilla instance uses 30–40 MB of memory and can process 13,000 events per second per core. Fluentd v1 runs on Linux, Mac OSX, and Windows; community distributions also include Docker images, a Kubernetes DaemonSet, and Ruby gems. It is self-hosted, and its components are available under the Apache 2 License. The project lists community help and commercial support from companies offering enterprise services. The homepage notes vulnerabilities patched in Fluentd v1.19.3 and advises updating fluent-package to v6.0.4.