# Last9: Unified observability. Triage faster.

> Unified observability for the whole team — developers, SREs, and AI agents. Full visibility. No cost explosion. Single view for metrics, logs, traces, and APM.

Source: https://last9.io/

Triage smarter and faster, and remediate across your stack with AI. Last9 makes
sense of noisy telemetry data for the whole team.

## Platform use cases

- **Control plane** — A single control plane to manage telemetry pipelines
  across logs, metrics, and traces. Route, transform, and apply cost controls
  before data hits storage.
- **Agentic DX** — An AI-native developer experience with an MCP server, so
  coding agents and SREs can query telemetry, triage incidents, and remediate
  issues directly from their IDE or chat.
- **Logs and traces** — Correlated logs and distributed traces with full
  OpenTelemetry support. Jump from a slow span to the exact log lines that
  explain it, with no sampling on errors.
- **Dashboards** — High-cardinality dashboards backed by a Prometheus-compatible
  query engine. Slice by any label without pre-aggregation, and share views
  across teams.
- **User monitoring** — Real user monitoring (RUM) for web and mobile. Capture
  Core Web Vitals, session replays, and frontend errors, then correlate them
  with backend traces.
- **Alerting** — Real-time alerting with deduplication, routing, and on-call
  integrations. Define rules in PromQL or in the UI, and send to Slack,
  PagerDuty, OpsGenie, and more.

## How Last9 unifies your telemetry

Last9 ingests every telemetry signal — metrics, logs, traces, and profiles — and
routes them through an AI Control Plane, Context Store, and Unified Telemetry
layer to power three outputs.

- Inputs: metrics, logs, traces, profiles
- Processing: AI Control Plane, Context Store, Unified Telemetry
- Outputs: dashboards, alerts, AI agents

## Platform features

- **Trace anything, fast.** Everything is correlated and queryable. Switch
  between logs, traces, and metrics in one click.
- **Unified, high-cardinality observability.** Track database calls,
  deployments, and user flows in real time, even at 20M+ cardinality per metric.
- **Fine-tune telemetry before it hits storage.** Drop noise, route critical
  signals, and monitor costs in real time.
- **AI-native triage.** Plug in to Claude, Cursor, or Slack and let AI co-pilots
  explain alerts, errors, and traces.
- **Use your own stack.** No agents and no rip-and-replace. Point your existing
  telemetry sources at Last9.
- **Granular context.** Monitor every request, tenant, and user in full
  fidelity, without dropping labels or sampling data.
- **Minutes to value.** Start with one config. Last9 auto-detects services and
  generates dashboards.

## Works for every role

- **Developers** — Debug contextually across metrics, logs, and traces. Get RCA
  guides in your IDE and ask questions in natural language.
- **SRE and platform engineers** — Get the alerts that matter, increase
  reliability, and improve cost-efficiency with real-time ingestion control.
- **Engineering leaders** — Pay only for what you use, without losing signal.
  Proven at 60M users and 50K alerts/sec.

## Scale

- 545 million events ingested per minute
- 61.2 million concurrent users monitored
- 100,000 alert evaluations per minute
- 12 of the world's 20 largest streaming events monitored

## Security

- End-to-end encryption — all data encrypted in transit and at rest.
- Multi-factor auth — enterprise SSO with advanced MFA requirements.
- Role-based access — granular permissions and audit trails.
- Zero trust architecture — every request verified and authenticated.

CNCF Silver Member. AWS Partner (Qualified Software). Rated 4.8/5 on G2.

## Integrations

Last9 natively integrates with common open standards across apps, infra, CDNs,
and cloud — including Prometheus, OpenTelemetry, Kubernetes, Docker, AWS, Azure,
Google Cloud, Grafana, Datadog, New Relic, PostgreSQL, MySQL, and Slack.

See the full list of 100+ integrations at https://last9.io/docs/integrations/

## Customers

Engineering teams using Last9, and the industries they work in:

- Replit — Cloud IDE
- CleverTap — Customer Engagement
- Pine Labs — Merchant Payments
- Tata 1mg — E-Pharmacy
- MPL — Gaming
- Housing.com — Property Marketplace
- InCred — Lending / NBFC
- Lead School — EdTech
- Truemeds — Online Pharmacy
- Circle — Community Platforms

See the full customer list at https://last9.io/customers/

### Customer stories

- Reliable observability for 50+ million concurrent live-streaming viewers — https://last9.io/customers/reliable-observability-for-50-million-concurrent-live-streaming-viewers/
- Housing.com replaces its ELK stack with Last9, cutting costs and infra overhead — https://last9.io/customers/housing-replaces-elk-stack-with-last9/
- Probo cuts monitoring costs by 90% with Last9 — https://last9.io/customers/probo-cuts-monitoring-costs-by-90-per-cent-with-last9/
- Quickwork champions platform transparency for its customers with Last9 — https://last9.io/customers/quickwork-champions-platform-transparency-for-its-customers-with-last9/

> With Last9, we just eliminated the toil. No more worrying about failing
> dashboards or alerts — we can finally use our metrics. It just works.
> — Matt Iselin, Head of SRE at Replit

> Using Last9's high cardinality workflows, we measured SLAs accurately,
> extracted system insights, and tracked customer impact proactively.
> — Ranjeet Walunj, SVP Engineering at CleverTap

## Where to go next

- Documentation: https://last9.io/docs/
- Full documentation as plain text: https://last9.io/llms-full.txt
- Customer stories: https://last9.io/customers/
- Blog: https://last9.io/blog/
- Sitemap: https://last9.io/sitemap-index.xml