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Unified observability for developers, SREs, and AI agents to triage faster and ship code with confidence.

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51 reviews tracked

The Bottom Line

Entry price

Free plan available, paid tiers above

Biggest pro

Eliminates data sampling, providing full fidelity during incidents.

Biggest con

Specific limitations on data retention and alert rules for the free tier.

TL;DR - Last9

  • Unified observability for metrics, logs, traces, and APM without data sampling.
  • AI-native features for automated root cause analysis and production debugging.
  • Cost-effective with a Control Plane for telemetry management and no per-host pricing.
Pricing: Free plan available
Best for: Growing teams
4.7/5 across review platforms

What is Last9?

Editorial review
Last9 provides a unified observability platform that integrates metrics, logs, traces, and APM into a single view, enabling teams to triage issues faster and maintain full visibility without cost explosions. It is designed to be AI-native, offering AI copilots that explain alerts, errors, and traces within existing tools like Slack, Claude, or Cursor. The platform works with existing telemetry sources, eliminating the need for agents or rip-and-replace migrations, and provides granular context by monitoring every user, tenant, and request in full fidelity without dropping labels or sampling data. The platform offers a powerful Control Plane to manage telemetry before storage, allowing users to drop noise, route critical signals, and monitor costs in real-time. It supports high-cardinality visibility, correlating all data types and allowing queries using PromQL, LogQL, TraceQL, or SQL. Last9 also includes user monitoring for frontend and backend correlation, advanced alerting with GitOps support, and one-click migration tools for dashboards and monitors from platforms like Datadog, Grafana, and New Relic. It's built for developers, SREs, and engineering leaders to improve reliability, reduce costs, and accelerate debugging with AI-powered insights and root cause analysis.

Available on: Web

Pros & Cons

Pros

  • Eliminates data sampling, providing full fidelity during incidents.
  • AI-powered insights and debugging accelerate root cause analysis.
  • Cost-effective with no per-host/node/user pricing and real-time cost monitoring.
  • Seamless integration with existing tools and open standards (OTel, Prometheus).
  • Reduces alert storms with built-in deduping and contextual alerting.

Cons

  • Specific limitations on data retention and alert rules for the free tier.
  • Advanced features like SLO monitoring and cold storage are not available in lower tiers.
  • Requires integration with existing telemetry sources, which might involve initial setup.

Ratings Across the Web

4.7(51 reviews)

Ratings aggregated from independent review platforms. Learn more

Key Features

Unified view for metrics, logs, traces, and APMAI-native copilots for alert explanation and RCAControl Plane for real-time telemetry ingestion managementHigh-cardinality visibility without data samplingUser Monitoring (RUM) for frontend and backend correlationAdvanced alerting with GitOps support and anomaly detectionCompatibility with existing telemetry sources (OTel native, Prometheus compatible)One-click import for Datadog/Grafana dashboards and monitors

Pricing Plans

Pricing checked Jun 11, 2026

Free

$0 / mo

  • 100M events monthly
  • Unlimited team members
  • 10 ingestion rules
  • 20 alert rules
  • 7-day data retention
  • Email support
  • Service Discovery (APM)
  • Log Analytics

Pro

$280 / mo

  • 1B events / mo
  • Everything in the Free Plan
  • Unlimited events, usage pricing applies
  • Unlimited ingestion rules
  • Unlimited alert rules
  • 90-day data retention for metrics
  • 14-day data retention for logs and traces
  • Streaming aggregates

Enterprise

Contact us

  • Everything in the Pro Plan
  • Commitment pricing
  • Custom retention
  • Custom cardinality quotas
  • Bring your own cloud
  • 24×7×365 premium enterprise support
  • PoC + Migration support
  • SLO Monitoring

How Last9's pricing compares

At $280/mo, Last9 is the most premium of its 4 direct competitors.

Entry paid plan, monthly. Pricing checked Jun 11, 2026.

Reviews

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4.7/5

Across 51 verified user reviews on G2

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Last9 FAQ

How does Last9 help with incident triage and debugging?

Last9 unifies metrics, logs, traces, and APM into a single view, which helps teams triage issues faster. It also provides AI copilots that explain alerts, errors, and traces within existing tools, accelerating root cause analysis.

What kind of user or team benefits most from Last9?

Last9 is built for developers, Site Reliability Engineers (SREs), and engineering leaders. It helps these teams improve reliability, reduce costs, and accelerate debugging through AI-powered insights.

How does Last9 compare to Datadog regarding data sampling?

Last9 eliminates data sampling, providing full fidelity during incidents by monitoring every user, tenant, and request without dropping labels or sampling data. This contrasts with platforms that may sample data, potentially obscuring critical details.

What are the main limitations to consider when adopting Last9?

Last9 has specific limitations on data retention and alert rules for its free tier, and advanced features like SLO monitoring and cold storage are not available in lower tiers. It also requires integration with existing telemetry sources, which may involve initial setup.

How is Last9 priced?

Last9 is available on a free tier, with paid plans offered for users who require more usage and advanced features. Its pricing model is designed to be cost-effective, with no per-host, per-node, or per-user charges.

Can Last9 integrate with existing observability tools and data sources?

Yes, Last9 is designed to work with existing telemetry sources and open standards like OTel and Prometheus, eliminating the need for agents or rip-and-replace migrations. It also offers one-click migration tools for dashboards and monitors from platforms like Datadog, Grafana, and New Relic.

How does Last9 manage telemetry data before storage?

Last9 features a powerful Control Plane that manages telemetry before storage. This allows users to drop noise, route critical signals, and monitor costs in real-time, ensuring efficient data handling and cost control.

Source: last9.io

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