Closest tools
SigNoz covers metrics, traces, and logs on OpenTelemetry. OpenObserve is a Rust platform for logs, metrics, and traces, and VictoriaMetrics is a Prometheus-compatible time-series database with low resource use.
Alternatives / Last9
8 open-source alternatives
8 Best Open Source Last9 Alternatives in 2026
Looking for an open source Last9 alternative? We compared 8 open source observability tools by license, signals, and maintenance. SigNoz, OpenObserve, and VictoriaMetrics are the closest, while Maple is source available.
Written by Maxime DERAME
Last updated:
Best Last9 alternatives at a glance
| Alternative | Best for | License |
|---|---|---|
| SigNoz | Metrics, traces, and logs on OpenTelemetry | MIT core + EE |
| OpenObserve | Rust platform for all signals | AGPL-3.0 |
| VictoriaMetrics | Prometheus-compatible | Apache-2.0 |
| HyperDX | Replay, logs, traces on ClickHouse | MIT |
| GreptimeDB | Database for metrics, logs, traces | Apache-2.0 |
| Uptrace | OpenTelemetry APM | AGPL-3.0 |
| Maple | ClickHouse platform with MCP (FSL) | FSL-1.1 |
| Gigapipe | Logs, metrics, traces, profiles | AGPL-3.0 |
How we chose these Last9 alternatives
We looked for open-source tools that store and query metrics, logs, and traces like Last9. We verified each project's license, recent activity, stars, and self-hosting in its repository. See our methodology for the full criteria.
ClickHouse-based
HyperDX unifies session replay, logs, traces, and metrics and is now owned by ClickHouse. Gigapipe is built on ClickHouse and DuckDB with compatibility for OpenTelemetry, Loki, and Prometheus, and Maple correlates signals by trace ID.
Others
Uptrace is an OpenTelemetry APM with free self-hosting, and GreptimeDB is a database for metrics, logs, and traces with SQL and PromQL.
Important: licenses
Maple uses FSL-1.1, which converts to Apache 2.0 after two years, so it is source available until then. VictoriaMetrics keeps multi-tenancy, anomaly detection, and downsampling in an enterprise tier. SigNoz has enterprise directories.
License details
HyperDX is MIT. SigNoz core is MIT. OpenObserve, Gigapipe, and Uptrace are AGPL-3.0. VictoriaMetrics and GreptimeDB are Apache-2.0.
Maintenance status
All eight had commits within days or weeks of this update.
Why look for a Last9 alternative?
Last9 is a proprietary platform priced by ingest. Open-source stacks can be self-hosted at predictable cost, but you run storage and scaling.
signoz.io
SigNoz is an all-in-one observability platform for microservices that combines metrics, distributed tracing, and logs with dashboards and alerts, built on OpenTelemetry. The repository is MIT outside its ee directories, which are under a separate license.
32.4K2.5KMIT core + EESelf-hosted
Pricing: Free self-hosted community edition; paid cloud and enterprise plans.
- Metrics, traces, and logs in one OpenTelemetry-based tool
- Active development
- Lower cost than proprietary APM
- Open core with enterprise features under a separate license
- Needs resources to operate at scale
openobserve.ai
OpenObserve is a Rust-built observability platform for logs, metrics, and traces with columnar storage, high compression, a stateless architecture, and OpenTelemetry compatibility, using object storage such as S3, GCS, or Azure Blob to reduce cost.
22.5K1.1KAGPL-3.0Self-hosted
Pricing: Free self-hosted; hosted and enterprise plans available.
- Very low storage cost with high compression
- Logs, metrics, and traces in one tool
- OpenTelemetry compatible
- AGPL-3.0 license
- Younger than Grafana-based stacks
victoriametrics.com
VictoriaMetrics is a fast, cost-effective time series database compatible with Prometheus, with MetricsQL, long-term retention, high-cardinality handling, OpenTelemetry support, and single-binary or cluster deployment. An enterprise tier adds extra features.
17.9K1.8KApache-2.0Self-hosted
Pricing: Free open source; paid enterprise tier.
- Efficient storage and high cardinality
- Drop-in Prometheus compatibility
- Single-binary simplicity or clustering
- Metrics-focused
- Some features are enterprise only
hyperdx.io
HyperDX is an MIT-licensed observability platform that combines logs, traces, metrics, errors, and session replays in one interface, built on ClickHouse and OpenTelemetry, with a hosted option billed by data volume.
10K499MITSelf-hosted
Pricing: Free to self-host; the hosted service is usage-based.
- Logs, traces, metrics, and replay in one tool
- OpenTelemetry-based
- MIT license
- Heavier to run than an uptime monitor
- Not focused on simple uptime checks
greptime.com
GreptimeDB is a cloud-native observability database unifying metrics, logs, and traces with SQL, PromQL, and streaming support, sub-second queries, OpenTelemetry-native ingestion, and deployment from ARM edge devices to the cloud.
6.8K570Apache-2.0Self-hosted
Pricing: Free open source; managed cloud pricing available.
- Unified storage for all telemetry signals
- SQL and PromQL queries
- Efficient at petabyte scale
- A database, not a full monitoring UI
- Younger ecosystem
uptrace.dev
Uptrace is an open-source APM that integrates traces, metrics, and logs through OpenTelemetry, with a service graph, RED metrics, and support for many languages. It can be self-hosted or used as a managed cloud.
4.3K223AGPL-3.0Self-hosted
Pricing: Free self-hosted; cloud has a free tier and pay-per-usage plans.
- All-in-one OpenTelemetry APM
- Service graph and RED metrics
- Vendor-agnostic
- AGPL-3.0 license
- Smaller community than SigNoz or Grafana
maple.dev
Maple is an observability platform built on OpenTelemetry and ClickHouse for traces, logs, and metrics, with session replay, service maps, error tracking, alerting, and an MCP server for AI agent diagnostics. It is licensed under FSL-1.1, which converts to Apache-2.0 two years after each release.
1.9K120FSL-1.1Self-hosted
Pricing: Free local mode in a single binary; hosted plan from $39 per month.
- Single binary for local use with embedded ClickHouse
- MCP server for AI agents
- Traces, logs, metrics, and session replay
- Source available, not OSI-approved open source
- Young project
gigapipe.com
Gigapipe is a unified observability platform for logs, metrics, traces, and profiles, compatible with OpenTelemetry, Loki, Prometheus, and Tempo, built on OLAP engines and NVMe storage with flat-cost pricing.
1.7K103AGPL-3.0Self-hosted
Pricing: Free self-hosted; flat-cost commercial offering.
- Compatible with Loki, Prometheus, Tempo, and OpenTelemetry
- All signals in one store
- Avoids data silos
- AGPL-3.0 license
- Smaller community
Compare Last9 alternatives
| Alternative | Type | License | Self-hosted | Best for |
|---|---|---|---|---|
| SigNoz | Observability | MIT core + EE | Yes | Closest replacement |
| OpenObserve | Observability | AGPL-3.0 | Yes | Cheap storage |
| VictoriaMetrics | Metrics DB | Apache-2.0 (+ paid enterprise) | Yes | Metrics at scale |
| HyperDX | Observability | MIT | Yes | Unified debugging |
| GreptimeDB | Observability DB | Apache-2.0 | Yes | Unified storage |
| Uptrace | Observability | AGPL-3.0 | Yes | Traces and metrics |
| Maple | Observability | FSL-1.1 (source available) | Yes | Incident workflows |
| Gigapipe | Observability | AGPL-3.0 | Yes | Loki and Prometheus users |
Which one should you choose?
Want one platform for all telemetry
SigNoz covers all signals on OpenTelemetry.
Want Prometheus-compatible storage
VictoriaMetrics is a drop-in Prometheus replacement.
Want to cut storage cost
OpenObserve is built in Rust for efficient storage.