
Last9
UnclaimedUnified observability for developers, SREs, and AI agents to triage faster and ship code with confidence.
Visit WebsiteThe 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.
What is Last9?
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
Ratings aggregated from independent review platforms. Learn more
Key Features
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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Last9 FAQ
How does Last9 help with incident triage and debugging?
What kind of user or team benefits most from Last9?
How does Last9 compare to Datadog regarding data sampling?
What are the main limitations to consider when adopting Last9?
How is Last9 priced?
Can Last9 integrate with existing observability tools and data sources?
How does Last9 manage telemetry data before storage?
Source: last9.io