📟 monitoring

Splunk costs $35/mo.
These cost $0.

22 free alternatives to Splunk, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.

⚡ Quick Verdict · 2027 Guide

The top-rated free, open-source replacement for Splunk is Apache Superset (Open Source Open Source). Across this category, 17 self-hostable tools are available (including Apache Superset and Grafana). Switching a 5-person team saves up to $2,100/year compared to Splunk's $35/mo subscription.

The catch: Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.

See the 22 picks ↓

Splunk vs Free Alternatives

Quick side-by-side comparison · $0/mo vs $35/mo

Alternative	Type	License	Where It Runs	Stars	Head-to-Head
Apache Superset	open source	Open Source	Self-host	★ 75.4k	Splunk vs Apache Superset →
Grafana	open source	Open Source	Self-host	★ 77.7k	Splunk vs Grafana →
Prometheus	open source	Open Source	Self-host	★ 67.3k	Splunk vs Prometheus →
ProjectDiscovery	open source	Open Source	Local	★ 32.7k	Splunk vs ProjectDiscovery →
SigNoz	open source	Open Source	Self-host	★ 32.5k	Splunk vs SigNoz →
Grafana Loki	open source	Open Source	Self-host	★ 29.1k	Splunk vs Grafana Loki →
Redash	open source	BSD-2-Clause	Self-host	★ 28.9k	Splunk vs Redash →
OpenObserve	open source	AGPL-3.0	Self-host	★ 22.9k	Splunk vs OpenObserve →
Vector	open source	Open Source	Self-host	★ 22.8k	Splunk vs Vector →
Logstash	open source	Open Source	Self-host	★ 15k	Splunk vs Logstash →
HyperDX	open source	Open Source	Self-host	★ 10k	Splunk vs HyperDX →
OpenLLMetry	open source	Open Source	Local	★ 7.5k	Splunk vs OpenLLMetry →
Coroot	open source	Apache-2.0	Self-host	★ 8k	Splunk vs Coroot →
GreptimeDB	open source	Open Source	Self-host	★ 6.8k	Splunk vs GreptimeDB →
Helicone	open source	Open Source	Local	★ 6.3k	Splunk vs Helicone →
Apache Pinot	open source	Open Source	Self-host	★ 6.2k	Splunk vs Apache Pinot →
Logfire	open source	Open Source	Local	★ 4.5k	Splunk vs Logfire →
Tracecat	open source	Open Source	Self-host	★ 3.9k	Splunk vs Tracecat →
Uptrace	open source	AGPL-3.0	Self-host	★ 4.3k	Splunk vs Uptrace →
Checkmk	open source	GPL-2.0	Self-host	★ 2.6k	Splunk vs Checkmk →
Maple	open source	Open Source	Self-host	★ 1.9k	Splunk vs Maple →
Gigapipe	open source	Open Source	Local	★ 1.7k	Splunk vs Gigapipe →

The picks

22 open source · ranked by fit

01
Apache Superset
open sourceOpen SourceSelf-host
75.4knov 2026
Connect any SQL database, build charts with drag-and-drop or raw SQL, and publish interactive dashboards without writing application code.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/apache/superset or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit superset.apache.org ↗Source Compare vs Splunk →also replaces 2 other apps →
02
Grafana
open sourceOpen SourceSelf-host
77.7knov 2026
Grafana unifies metrics, logs, traces, profiles, and business data into one OpenTelemetry-native platform with AI-assisted root cause analysis and adaptive cost controls.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/grafana/grafana or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit grafana.com ↗Source Compare vs Splunk →also replaces 2 other apps →
03
Prometheus
open sourceOpen SourceSelf-host
67.3knov 2026
Pull-based monitoring system with a multi-dimensional data model, PromQL query language, built-in alerting, and a time series database built for cloud native environments.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/prometheus/prometheus or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit prometheus.io ↗Source Compare vs Splunk →also replaces 2 other apps →
04
ProjectDiscovery
open sourceOpen SourceLocal
32.7knov 2026
Monitor infrastructure for exploitable vulnerabilities with real-time detection, automated workflows, and zero false positives.
The catch vs Splunk
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/projectdiscovery/nuclei or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit projectdiscovery.io ↗Source Compare vs Splunk →also replaces 1 other app →
05
SigNoz
open sourceOpen SourceSelf-host
32.5knov 2026
Comprehensive monitoring and troubleshooting solution for microservices architectures, offering metrics, traces, and logs in a single pane.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/signoz/signoz or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit signoz.io ↗Source Compare vs Splunk →also replaces 9 other apps →
06
Grafana Loki
open sourceOpen SourceSelf-host
29.1knov 2026
Horizontally scalable, multi-tenant log aggregation system that stores and queries logs using label-based indexing instead of full-text indexing, keeping storage costs low.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/grafana/loki or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit grafana.com ↗Source Compare vs Splunk →also replaces 3 other apps →
07
Redash
open sourceBSD-2-ClauseSelf-host
28.9knov 2026
Redash is an open-source data visualization and analytics platform that helps teams make sense of their data through SQL queries and interactive dashboards.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed MicroStrategy.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/getredash/redash or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit redash.io ↗Source Compare vs Splunk →also replaces 7 other apps →
08
OpenObserve
open sourceAGPL-3.0Self-host
22.9knov 2026
Monitor logs, metrics, and traces with an open-source observability platform. Achieve petabyte scale with 140x lower storage costs and high performance.
The catch vs Splunk
It can ingest and search logs cheaply, but you must operate storage and collectors and give up Axiom's managed serverless scaling and polished event-query experience.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Hosted signup, or a single binary/Docker container; Helm plus external services for HA
setup
The easy single-node path still needs collectors and persistent storage; production HA adds Kubernetes, object storage, PostgreSQL, and NATS.
your data
Telemetry is stored as Apache Parquet on local disk or object storage; single-node metadata defaults to SQLite, while HA uses PostgreSQL and NATS.
checked
2026-11-07
Visit openobserve.ai ↗Source Compare vs Splunk →also replaces 14 other apps →
09
Vector
open sourceOpen SourceSelf-host
22.8knov 2026
Rust-built observability pipeline tool that collects, transforms, and routes logs and metrics across 47 sources and 62 sinks with no runtime dependencies.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/vectordotdev/vector or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit vector.dev ↗Source Compare vs Splunk →also replaces 1 other app →
10
Logstash
open sourceOpen SourceSelf-host
15knov 2026
Logstash is a free and open server-side data processing pipeline that ingests data from multiple sources, transforms it, and sends it to your desired destination.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/elastic/logstash or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit elastic.co ↗Source Compare vs Splunk →also replaces 4 other apps →
11
HyperDX
open sourceOpen SourceSelf-host
10knov 2026
Open source observability platform unifying session replays, logs, traces, metrics and errors. Fast search, automatic clustering, $0.40/GB pricing.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/hyperdxio/hyperdx or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit hyperdx.io ↗Source Compare vs Splunk →also replaces 15 other apps →
12
OpenLLMetry
open sourceOpen SourceLocal
7.5knov 2026
Open-source observability platform for LLMs using OpenTelemetry. Monitor performance, track costs, and debug AI applications with just 2 lines of code.
The catch vs Splunk
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/traceloop/openllmetry or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit traceloop.com ↗Source Compare vs Splunk →also replaces 4 other apps →
13
Coroot
open sourceApache-2.0Self-host
8knov 2026
Coroot simplifies system monitoring by providing metrics, logs, traces, and profiling with zero instrumentation, leveraging eBPF technology.
The catch vs Splunk
It is strongest for Linux containers and Kubernetes, but lacks Datadog's breadth across integrations, synthetics, RUM, security, cloud services, and managed global operation.
Install, platforms & data +
platforms
webself-hostedself-host, real ops
install
Docker Compose for one host, or the Kubernetes Operator/Helm for a cluster
setup
The eBPF node agent needs a supported Linux kernel and privileged host access on every node, and the product is most natural for containers and Kubernetes.
engines
Core observability is non-AI; optional root-cause investigations connect to Coroot Cloud or configured Anthropic, OpenAI, Azure OpenAI, Groq, Mistral, Ollama, or OpenAI-compatible endpoints.
your data
Metrics use Prometheus-compatible storage or ClickHouse, while logs, traces, and profiles use ClickHouse; configuration uses SQLite by default or PostgreSQL.
checked
2026-11-07
Visit coroot.com ↗Source Compare vs Splunk →also replaces 7 other apps →
14
GreptimeDB
open sourceOpen SourceSelf-host
6.8knov 2026
Cloud-native observability database unifying metrics, logs, and traces with sub-second queries, 50x cost reduction, and seamless OpenTelemetry integration.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/greptimeteam/greptimedb or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit greptime.com ↗Source Compare vs Splunk →also replaces 8 other apps →
15
Helicone
open sourceOpen SourceLocal
6.3knov 2026
Open-source platform for logging, monitoring, and debugging LLM applications. Route, debug, and analyze AI apps with comprehensive observability tools.
The catch vs Splunk
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/helicone/helicone or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit helicone.ai ↗Source Compare vs Splunk →also replaces 5 other apps →
16
Apache Pinot
open sourceOpen SourceSelf-host
6.2knov 2026
Sub-second SQL queries on fresh streaming data at petabyte scale, built for high-concurrency user-facing apps and AI agent backends.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/apache/pinot or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit pinot.apache.org ↗Source Compare vs Splunk →also replaces 2 other apps →
17
Logfire
open sourceOpen SourceLocal
4.5knov 2026
Logfire offers intuitive observability tools for Python applications, combining logs, profiling, and telemetry in one platform.
The catch vs Splunk
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/pydantic/logfire or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit pydantic.dev ↗Source Compare vs Splunk →also replaces 3 other apps →
18
Tracecat
open sourceOpen SourceSelf-host
3.9knov 2026
Tracecat is a scalable, self-hostable platform for automating security workflows and playbooks without limits.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/TracecatHQ/tracecat or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit tracecat.com ↗Source Compare vs Splunk →also replaces 1 other app →
19
Uptrace
open sourceAGPL-3.0Self-host
4.3knov 2026
Uptrace is an OpenTelemetry-based platform that integrates traces, metrics, and logs to help monitor and optimize complex distributed systems.
The catch vs Splunk
It is a capable OpenTelemetry APM, but it is narrower than the hosted Grafana, Prometheus, Loki, and Tempo ecosystem and carries a multi-database self-hosting burden.
Install, platforms & data +
platforms
webself-hostedself-host, real ops
install
Hosted signup, or Docker Compose with Uptrace, ClickHouse, PostgreSQL, Redis, and an OpenTelemetry Collector
setup
Even the small-team Compose deployment is a multi-database stack, and production operation adds collectors, backups, TLS, retention tuning, and ordered upgrades.
your data
Self-hosted telemetry lives in ClickHouse, metadata in PostgreSQL, and transient cache/session data in Redis; Docker uses persistent named volumes.
checked
2026-11-07
Visit uptrace.dev ↗Source Compare vs Splunk →also replaces 10 other apps →
20
Checkmk
open sourceGPL-2.0Self-host
2.6knov 2026
Monitor your entire IT infrastructure with 2,000+ plugins, automated discovery, and scalable architecture. Open source and enterprise solutions available.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Prtg.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/tribe29/checkmk or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit checkmk.com ↗Source Compare vs Splunk →also replaces 8 other apps →
21
Maple
open sourceOpen SourceSelf-host
1.9knov 2026
Observability platform built on OpenTelemetry and ClickHouse. Collect, visualize, and query distributed traces, logs, and metrics, with an MCP server for AI agent diagnostics.
The catch vs Splunk
Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.
Install, platforms & data +
platforms
webself-hosteddocker to self-host
install
Clone https://github.com/MapleTechLabs/maple or deploy with Docker Compose
setup
Deploy via Docker or binary release from GitHub and configure environment variables.
your data
All application data and configuration live on your own server or local database.
checked
2026-11-07
Visit maple.dev ↗Source Compare vs Splunk →also replaces 7 other apps →
22
Gigapipe
open sourceOpen SourceLocal
1.7knov 2026
Unified platform for logs, metrics, traces and profiles with native compatibility for popular tools like OpenTelemetry, Prometheus, and Loki. No data silos, no usage limits.
The catch vs Splunk
Community-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
platforms
desktopcross-platformone-click install
install
Clone https://github.com/metrico/gigapipe or deploy with Docker Compose
setup
Download the native package or installer for your operating system.
your data
All application data lives locally on your own machine.
checked
2026-11-07
Visit gigapipe.com ↗Source Compare vs Splunk →also replaces 5 other apps →

Splunk Head-to-Head Comparisons (2027)

Side-by-side trade-off breakdowns · 22 free alternatives

Splunk vs Apache SupersetOpen Source · Self-host →

Splunk vs GrafanaOpen Source · Self-host →

Splunk vs PrometheusOpen Source · Self-host →

Splunk vs ProjectDiscoveryOpen Source · Local →

Splunk vs SigNozOpen Source · Self-host →

Splunk vs Grafana LokiOpen Source · Self-host →

Splunk vs RedashBSD-2-Clause · Self-host →

Splunk vs OpenObserveAGPL-3.0 · Self-host →

Splunk vs VectorOpen Source · Self-host →

Splunk vs LogstashOpen Source · Self-host →

Splunk vs HyperDXOpen Source · Self-host →

Splunk vs OpenLLMetryOpen Source · Local →

Splunk vs CorootApache-2.0 · Self-host →

Splunk vs GreptimeDBOpen Source · Self-host →

Splunk vs HeliconeOpen Source · Local →

Splunk vs Apache PinotOpen Source · Self-host →

Splunk vs LogfireOpen Source · Local →

Splunk vs TracecatOpen Source · Self-host →

Splunk vs UptraceAGPL-3.0 · Self-host →

Splunk vs CheckmkGPL-2.0 · Self-host →

Splunk vs MapleOpen Source · Self-host →

Splunk vs GigapipeOpen Source · Local →

Frequently Asked Questions

Direct answers · Splunk open-source replacements

What is the best free alternative to Splunk?+

The top free alternative to Splunk is Apache Superset (open source, Open Source). Connect any SQL database, build charts with drag-and-drop or raw SQL, and publish interactive dashboards without writing application code. Other popular Splunk replacements include Grafana, Prometheus, ProjectDiscovery.

Can I self-host a free replacement for Splunk?+

Yes. Of the 22 free alternatives to Splunk, 17 can be self-hosted on your own server or local machine: Apache Superset (Open Source), Grafana (Open Source), Prometheus (Open Source), SigNoz (Open Source), Grafana Loki (Open Source), Redash (BSD-2-Clause), OpenObserve (AGPL-3.0), Vector (Open Source), Logstash (Open Source), HyperDX (Open Source), Coroot (Apache-2.0), GreptimeDB (Open Source), Apache Pinot (Open Source), Tracecat (Open Source), Uptrace (AGPL-3.0), Checkmk (GPL-2.0), Maple (Open Source).

How much does switching from Splunk to a free alternative save?+

Splunk starts at $35/month per seat ($420/year). Switching a 5-person team to a free alternative like Apache Superset saves $2,100 per year in software subscription fees.

Should I vibe-code or build my own Splunk clone from scratch?+

Our build verdict for Splunk is NO (use a free alternative, save the tokens). Instead of paying recurring SaaS fees for Splunk or rebuilding it from scratch, deploy one of the 22 battle-tested open-source alternatives like Apache Superset.

What is the catch when switching from Splunk to Apache Superset?+

Requires self-hosting setup, updates, and server maintenance compared to managed Splunk.