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

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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

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

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
  • Distributed Tracing
  • Browser Monitoring (RUM)
  • Custom Dashboards
  • 20M timeseries / metric / day Cardinality Quota
  • SSO Access Controls
  • SOC2 Type 2
  • ISO 27001
  • HIPAA
  • PCI DSS
  • Best-effort reliability SLAs

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
  • LogMetrics and TraceMetrics
  • 99.9% write and 99.5% read SLAs
  • 1:1 support over Slack/MS Teams
  • Unlimited Alerting
  • 20M timeseries / metric / day Cardinality Quota
  • Cold Storage & Rehydration
  • Physical Indexes
  • Onboarding Support

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
  • Customizable Retention
  • Customizable Cardinality Quota
  • Audit Trail
  • Assigned FDE
  • 24/7 Support
  • Migration Support

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.

Reviews

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Last9 FAQ

What is Last9?

Last9 is a unified observability platform that provides a single view for metrics, logs, traces, and APM. It uses AI to help developers and SREs triage issues faster, debug with full context, and manage telemetry costs effectively without data sampling.

How much does Last9 cost?

Last9 offers a freemium pricing model. There's a Free plan for hobby projects and small teams, a Pro plan starting at $280/month for production apps, and an Enterprise plan with custom pricing for large-scale applications. Pricing is based on the number of events ingested, not per-host or per-user.

Is Last9 free?

Yes, Last9 offers a Free plan that includes 100M events monthly, unlimited team members, 10 ingestion rules, 20 alert rules, and 7-day data retention. This plan is suitable for hobby projects and small teams.

Who is Last9 for?

Last9 is designed for developers, SREs, platform engineers, and engineering leaders. It helps developers build and ship faster, SREs maintain reliability and cost-efficiency, and engineering leaders reduce observability spend while maintaining signal quality.

Source: last9.io