Open source · terminal native

Find the signal.
Stay in flow.

Lantern turns noisy logs into a clear investigation—search, dashboards, alerts, and review tools, right where you already work.

$pip install git+https://github.com/umahmo3/Lantern.git

Python 3.9+ · truecolor terminal · MIT

Choose a Lantern product view
lantern — production.log⌘K
OVERVIEWlast 15m
EVENTS124↑ 12%
ERROR RATE4.8%↑ 1.3%
P95 LATENCY312ms↑ 42ms
EVENT VOLUME
HTTP STATUS

2xx88%

4xx7%

5xx5%

TOP SOURCEapi-gateway · 38/min
ALERT RULES 32 FIRING
!
Error burststatus>=500 · last 5m
18 / threshold 10FIRING
!
P95 latencylatency_ms>250 · last 10m
312ms / threshold 250msFIRING
Auth failuressource=auth level=error · last 5m
2 / threshold 8HEALTHY

Rules are evaluated against the current event window.

SOURCES 6ALL HEALTHY ●
SOURCERATEVOLUMELAST SEENSTATE
api-gateway38/s12.4k2s ago● LIVE
auth-service12/s4.2k4s ago● LIVE
orders9/s3.8k2s ago● LIVE
payments6/s2.1k6s ago● LIVE
worker5/s1.8k3s ago● LIVE
nginx3/s9801s ago● LIVE
124 events · 6 sourcesj/k navigate · enter expand · / search · ? help

Deterministic demo data — reproducible on every run.

BRING ANY LOGJSON LineslogfmtsyslognginxCEFplain text
01 / INVESTIGATE

From raw output to
a defensible answer.

Lantern gives a terminal investigation the structure of a purpose-built observability tool—without the context switch.

01

Search everything

Filter messages and parsed fields with text, numeric, regex, and presence queries.

02

See the shape of an incident

Move from event volume to latency, status codes, threats, and source health without changing tools.

03

Keep your trail

Bookmark evidence, add notes, save queries, and export portable JSONL, CSV, or review reports.

One interface.
Two ways to run.

›_LOCAL MODE

Fast answers, zero infrastructure.

Read files or streams directly. Events stay in memory—ideal for one-off investigations and development.

kubectl logs -f my-pod | lantern-ant
BEACON PLATFORM

Durable logs for the whole team.

Add ClickHouse-backed storage, multi-tenancy, alert delivery, retention, and scalable deployment.

Explore Beacon

Your logs already have the answer.

Lantern helps you find it.

Start the Quickstart