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Top 23 TypeScript Observability Projects
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langfuse
🪢 Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. 🍊YC W23
Project mention: Three Budget-Guardrail Failure Modes That Matter More Than Model Quality (May 2026) | dev.to | 2026-05-19Source: https://github.com/langfuse/langfuse/issues/12614 (open, updated 2026-05-14)
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signoz
SigNoz is an open-source observability platform native to OpenTelemetry with logs, traces and metrics in a single application. An open-source alternative to DataDog, NewRelic, etc. 🔥 🖥. 👉 Open source Application Performance Monitoring (APM) & Observability tool
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openobserve
Open source observability platform for logs, metrics, traces, frontend monitoring, pipelines and LLM observability. A sophisticated, simple and highly performant alternative to Datadog, Splunk, and Elasticsearch with 140x lower storage costs and single binary deployment.
Project mention: Traceway: MIT-licensed observability stack you can self-host in ~90s | news.ycombinator.com | 2026-05-11You should take a look at https://github.com/openobserve/openobserve - Extremely performant and simple full-stack observability solution?
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Everything he lists is solved by effect-ts [1] bar, obviously, the language support.
[1] https://effect.website/
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hyperdx
Resolve production issues, fast. An open source observability platform unifying session replays, logs, metrics, traces and errors powered by ClickHouse and OpenTelemetry.
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Project mention: VoltAgent Just Asked Us to Build Their Guardrail Provider Interface. Here Is What We Shipped. | dev.to | 2026-03-20
VoltAgent is a 6.8k-star TypeScript framework for building AI agents. They already had InputGuardrail and OutputGuardrail types — handler functions that run before and after model calls.
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highlight
highlight.io: The open source, full-stack monitoring platform. Error monitoring, session replay, logging, distributed tracing, and more.
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Project mention: 12,000 AI-generated blog posts added in a single commit | news.ycombinator.com | 2026-04-04
They even have a scrolling 5-star reviews section, clearly generated: https://oneuptime.com/#reviews-title
https://github.com/OneUptime/oneuptime/commit/538e40c4ae724e...
https://github.com/OneUptime/oneuptime/commit/2bc585df20e6bb...
You can fabricate a professional business image in a few days with AI now. It's going to be hard to build an honest brand when everyone is going to point and say "vibe coded slop" because of examples like this website.
I'm already seeing such comments whenever someone posts an app on /r/macapps and it's really discouraging for beginners. If I would have met that resistance and amount of mean comments when I launched Lunar, I would have probably never put in that amount of effort.
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parca
Continuous profiling for analysis of CPU and memory usage, down to the line number and throughout time. Saving infrastructure cost, improving performance, and increasing reliability.
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codeburn
See where your AI coding tokens go. Interactive TUI dashboard for Claude Code, Codex, and Cursor cost observability.
Project mention: Show HN: macOS menu bar gauges for your Claude Code quota | news.ycombinator.com | 2026-06-10I use codeburn, has both terminal and menu bar versions. Works quite well - https://github.com/getagentseal/codeburn
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Project mention: Launch HN: Lucidic (YC W25) – Debug, test, and evaluate AI agents in production | news.ycombinator.com | 2025-07-30
Hey! I work for the LLM Ops platform LangWatch and I've been working on building out our Go support the past few months as a little hobby of mine (I hope more people adopt this, so I can spent more of my working hours on this ).
If you're interested, we're an LLM Ops platform, and our Go SDK has full support for OpenAI, and any OpenAI compatible endpoints, as well as some nice OpenTelemetry tracing support too.
https://github.com/langwatch/langwatch/tree/main/sdk-go
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pezzo
🕹️ Open-source, developer-first LLMOps platform designed to streamline prompt design, version management, instant delivery, collaboration, troubleshooting, observability and more.
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Project mention: Open-source Langsmith alternative written in Rust | news.ycombinator.com | 2026-01-06
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openlit
Open source platform for AI Engineering: OpenTelemetry-native LLM Observability, GPU Monitoring, Guardrails, Evaluations, Prompt Management, Vault, Playground. 🚀💻 Integrates with 50+ LLM Providers, VectorDBs, Agent Frameworks and GPUs.
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codeburn
See where your AI coding tokens go. Interactive TUI dashboard for Claude Code, Codex, and Cursor cost observability. (by AgentSeal)
Repo: https://github.com/AgentSeal/codeburn Open source, MIT.
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measure
Complete Mobile App Monitoring platform with Crash Reporting, ANR Tracking, Bug Reporting, Performance Tracing, Logging and more! 100% open source alternative to Firebase Crashlytics. (by measure-sh)
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llmgateway
Route, manage, and analyze your LLM requests across multiple providers with a unified API interface.
Project mention: LiteLLM Python package compromised by supply-chain attack | news.ycombinator.com | 2026-03-24Checkout LLM Gateway: https://llmgateway.io
Migration guide: https://llmgateway.io/migration/litellm
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langtrace
Langtrace 🔍 is an open-source, Open Telemetry based end-to-end observability tool for LLM applications, providing real-time tracing, evaluations and metrics for popular LLMs, LLM frameworks, vectorDBs and more.. Integrate using Typescript, Python. 🚀💻📊
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event-reduce
An algorithm to optimize database queries that run multiple times https://pubkey.github.io/event-reduce/
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
TypeScript Observability discussion
TypeScript Observability related posts
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Show HN: RePlaya – self-hosted browser session replay with live tailing
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In-process circuit breaker that kills runaway AI agents before they go rogue
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OpenTelemetry Events vs Logs - Key Differences Explained
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OpenTelemetry Collector vs. Fluentbit - Key Differences
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Is OpenTelemetry Production-Ready? A Practical Guide
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OpenTelemetry vs AWS X-Ray - Which Tracing Tool to Choose?
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Implementing OpenTelemetry in React Applications
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A note from our sponsor - SaaSHub
www.saashub.com | 11 Jun 2026
Index
What are some of the best open-source Observability projects in TypeScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | langfuse | 28,520 |
| 2 | signoz | 27,287 |
| 3 | kibana | 21,127 |
| 4 | openobserve | 19,214 |
| 5 | effect | 14,520 |
| 6 | hyperdx | 9,575 |
| 7 | voltagent | 9,367 |
| 8 | highlight | 9,287 |
| 9 | openstatus | 8,731 |
| 10 | oneuptime | 7,137 |
| 11 | ThreatMapper | 5,278 |
| 12 | parca | 4,884 |
| 13 | codeburn | 4,193 |
| 14 | langwatch | 3,297 |
| 15 | pezzo | 3,240 |
| 16 | lmnr | 2,981 |
| 17 | openlit | 2,495 |
| 18 | codeburn | 1,934 |
| 19 | measure | 1,304 |
| 20 | llmgateway | 1,288 |
| 21 | langtrace | 1,203 |
| 22 | nestjs-otel | 783 |
| 23 | event-reduce | 755 |
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