Skip to content
Last9 logo

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

From $280/mo (free plan available)Visit Website
Reviews onG2
51 reviews tracked

The Bottom Line

Price
From $280/mo (free plan available). Compare plans

Key facts

  • 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.

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.

What is Last9?

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

Ratings Across the Web

4.7(51 reviews)

Last9 holds an aggregate rating of 4.7 out of 5 from 51 reviews across G2, last checked September 23, 2026.

Ratings aggregated from independent review platforms. Learn more

Key Features

  • Unified view for metrics, logs, traces, and APM
  • AI-native copilots for alert explanation and RCA
  • Control Plane for real-time telemetry ingestion management
  • High-cardinality visibility without data sampling
  • User Monitoring (RUM) for frontend and backend correlation
  • Advanced alerting with GitOps support and anomaly detection
  • Compatibility with existing telemetry sources (OTel native, Prometheus compatible)
  • One-click import for Datadog/Grafana dashboards and monitors

Pricing Plans

Pricing checked Sep 18, 2026

Last9 plans and prices, checked September 2026
PlanPriceDetails
Free

$0 / mo

  • 100M events monthly
  • Unlimited team members
  • 10 ingestion rules
+15 more
  • 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
+13 more
  • 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
+11 more
  • 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

Is Last9 worth the price?

Good value

Last9's pricing is quite generous, especially with its robust Free tier offering 100M events monthly and a wide array of features.

The jump to the Pro tier at $280/month for 1B events is a reasonable step for growing teams, offering significant scalability. This pricing structure is best for startups and mid-sized companies looking for comprehensive observability without breaking the bank.

Hidden Costs & Gotchas

Unlimited events in Pro tier implies usage-based overages.

Cardinality quotas can lead to unexpected costs.

How Last9's pricing compares

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

Entry paid plan, monthly. Pricing checked Sep 18, 2026.

Reviews

Improve Your Thinking Patterns Using ChatGPT cover
$99Free with your review

Review Last9, get a free AI guide

Share your experience and we will send you Improve Your Thinking Patterns Using ChatGPT, free.

Write a review
4.7/5

Across 51 verified user reviews on G2

Add your hands-on experience using the offer above to help the next buyer.

Best Last9 Alternatives

Top alternatives based on features, pricing, and user needs.

View full list →

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

Explore More

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

Guides & Articles