Lantern — Agent Observability for the Enterprise

The Problem

AI agents are black boxes in production

When an agent makes a bad decision, you have no idea why. When costs spike, there is no attribution. When quality drifts, nobody notices until users leave.

Without Lantern

✗ Agent reasoning is invisible — you see inputs and outputs, nothing in between
✗ No way to trace why an agent chose a specific tool or ignored context
✗ Token costs are a monthly surprise on the invoice
✗ Quality degrades silently after model updates or prompt changes
✗ PII flows through prompts and responses with zero visibility
✗ Debugging production issues means reading logs and guessing

With Lantern

✓ Every reasoning step is a span — LLM calls, tool use, retrieval, custom logic
✓ Click through the full decision tree to see why the agent did what it did
✓ Token costs attributed per agent, per workflow, per span, per day
✓ Automated quality scoring with baseline regression alerts
✓ PII detection scans every prompt and response in real time
✓ Traces link directly to the reasoning step that caused the issue

support-triage success

production480ms$0.0066

data-pipeline success

production835ms$0.0048

code-reviewer error

staging51ms$0.0000

research-assistant success

dev418ms$0.0008

Status

Success

Duration

480ms

Tokens

1,047

Cost

$0.0066

Reasoning Chain (4 spans)

llm call Classify ticket urgency 151ms

tool call route_ticket 51ms

retrieval Similar past incidents 84ms

llm call Generate action plan 201ms

Platform Capabilities

Enterprise-grade agent observability

Everything you need to run AI agents in production with confidence.

🔍

Reasoning Chain Tracing

Every agent decision is captured as a span. LLM calls, tool invocations, memory retrievals, and custom reasoning steps — all linked in a navigable tree.

✅

Automated Quality Scoring

Built-in scorers for relevance, toxicity, and latency. Register custom scorers for domain-specific checks. Baseline snapshots detect regressions automatically.

💰

Token Cost Attribution

Per-span cost tracking by model, agent, and workflow. See exactly where your budget goes — down to individual tool calls. No more surprise invoices.

🔒

PII Detection

Scan every prompt and response for emails, phone numbers, SSNs, credit cards, and more. Flag or auto-redact before PII reaches your logs. SOC2-ready.

🔌

Auto-Instrumentation

Wrap your Anthropic or OpenAI client with one function call. Every API call is traced automatically — zero config, zero code changes to your agent logic.

📈

Data Source Tracking

See which services, SDK versions, and exporters are sending traces. Filter by source, environment, or agent. Know exactly where your data comes from.

Integration

Three lines of code. Full visibility.

Add Lantern to your existing agent code in under a minute. No infrastructure changes required.

Install the SDK

One package. Works with Node.js 20+. TypeScript-first with full type safety.

npm install @lantern-ai/sdk

Wrap your AI client

Call wrapAnthropicClient() or wrapOpenAIClient(). All API calls are now traced automatically with full input/output capture.

View in dashboard

Traces flow to the Lantern dashboard in real time. Click through reasoning chains, inspect spans, and track quality metrics from day one.

Pricing

Start free, scale with confidence

No credit card required. Upgrade when your agents are in production.

Community

Self-hosted, open source

$0 forever

MIT License

✓ Full trace capture (SDK)
✓ SQLite + Postgres storage
✓ Dashboard (traces, metrics, sources)
✓ Latency + cost scorers
✓ Custom eval scorers
✓ Unlimited agents and traces
✓ Community support

View on GitHub

Full breakdown by tier

Choose the plan that fits your compliance, scale, and support needs.

Feature	Community	Team	Enterprise
Trace capture SDK	✓	✓	✓
Auto-instrumentation (Anthropic, OpenAI)	✓	✓	✓
Dashboard (traces, metrics, sources)	✓	✓	✓
Custom evaluation scorers	✓	✓	✓
Self-hosted deployment	✓	✓	✓
Managed cloud ingest	—	✓	✓
PII detection + redaction	—	✓	✓
Alerting (Slack, webhooks)	—	✓	✓
Team-scoped RBAC	—	✓	✓
SOC2 / HIPAA audit export	—	—	✓
PagerDuty integration	—	—	✓
SSO / SAML	—	—	✓
Dedicated support + SLA	—	—	✓

Know what your agents are doing in production