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Best Free Alternatives to Splunk AppDynamics
Stop paying $6/vCPU (Infra) | $33/vCPU (Premium) | $50/vCPU (Enterprise). Discover professional-grade tools that won't break your budget.
Category: Full-Stack ObservabilityVerified for 2025
Top Recommended Replacements
Prometheus & Grafana
FREETop Professional Free Alternative
Why we like it
The industry standard for cloud-native monitoring; 100% free; massive community; native Kubernetes support; highly scalable through horizontal sharding.
Keep in mind
Requires significant manual setup and maintenance; lacks native 'Business IQ' features without complex custom dashboarding.
SigNoz
FREEBest Open-Source APM
Why we like it
OpenTelemetry-native (standardized instrumentation); provides metrics, traces, and logs in a single UI; no per-vCPU or per-node tax; easy to self-host on your own infrastructure.
Keep in mind
The self-hosted version requires engineering effort for high-availability setups; smaller library of 'one-click' enterprise integrations than AppDynamics.
Netdata
FREEBest for Real-Time Infrastructure
Why we like it
Zero-configuration monitoring; 1-second granularity for metrics; incredibly lightweight; provides immediate 'out-of-the-box' dashboards for hardware and services.
Keep in mind
Focuses more on infrastructure than code-level APM; distributed tracing is not as deep as specialized APM tools.
Zabbix
FREEBest for Enterprise Infrastructure
Why we like it
Mature, feature-rich, and 100% free; supports agentless and agent-based monitoring; massive library of templates; handles massive enterprise networks with ease.
Keep in mind
The UI is often criticized for being dated and complex; setup and configuration are more labor-intensive than modern SaaS tools.
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