# Langtrace

The official website for Langtrace (https://www.langtrace.ai) is no longer accessible, displaying a 404 "Site Not Found" error page. Furthermore, its public GitHub organization and repositories have been removed, indicating that the project is no longer actively maintained or hosted.

## Key Telemetry & Specifications

| Metric | Value |
| :--- | :--- |
| Tool Name | Langtrace |
| Handle | langtrace-ai |
| Status | sunset |
| Origin | open_source |
| Maintenance | active |
| Official Domain | langtrace.ai |
| Website URL | — |
| Categories | AI Developer Tools, AI Monitor, AI Agent, Large Language Models (LLMs), AI API, AI Productivity Tools |
| Pricing Model | Freemium |
| Monthly Visits | 2,900 |
| MoM Traffic Change | -2,206 |
| MoM Growth Rate | -43.2% |
| Primary Market | India |
| Market Share | 52.1% |
| Direct Visits | 1,131 |
| Organic Search Visits | — |
| Social Visits | — |
| Referral Visits | 278 |
| Email Visits | 93 |
| Review Score | — |
| Saved Count | 0 |
| Supported Platforms | Website |
| Billing Platforms |  |
| Attributes | Features: Website; Pricing: Contact for Pricing |
| Tags | Observability, AI Agents, Evaluations, Open Source, LLM, Langchain, LlamaIndex, CrewAI, DSPy, Metrics Tracking, API Tracing, Prompt Management, Security, GenAI, VectorDB |

## Current Status & What Happened

The official website for Langtrace (https://www.langtrace.ai) is no longer accessible, displaying a 404 "Site Not Found" error page. Furthermore, its public GitHub organization and repositories have been removed, indicating that the project is no longer actively maintained or hosted.

## What Was Langtrace? (Historical Overview)

Langtrace was introduced as an open-source, OpenTelemetry-based observability and evaluation platform designed for LLM applications. It provided Python and TypeScript SDKs to automatically trace interactions with major LLM providers (such as OpenAI, Anthropic, Gemini, Bedrock, Groq, LangChain, LlamaIndex, CrewAI, and DSPy) as well as vector databases, allowing developers to monitor tokens, costs, latency, and success rates through a unified dashboard.

## How to Replace Langtrace (Migration Guide)

Since Langtrace is no longer available, developers seeking alternative LLM observability and tracing tools can explore open-source and commercial OpenTelemetry-based solutions such as Langfuse, Arize Phoenix, Portkey, or OpenInference.

## Key Features & Capabilities

- **Broad LLM and framework coverage:** SDKs and instrumentation for OpenAI, Anthropic, Azure OpenAI, Gemini, Bedrock, Mistral, Cohere, Groq, Perplexity and xAI, plus frameworks like LangChain, LlamaIndex, LangGraph, LiteLLM, CrewAI and DSPy.
- **OpenTelemetry-native tracing:** Traces follow OpenTelemetry semantic conventions, so data can be sent to Langtrace or routed to Grafana, Datadog, Honeycomb and other OTEL-compatible backends without a Langtrace API key.
- **Usage, cost and performance analytics:** Track token consumption, spend, latency and success rate per project, model or user so regressions and cost spikes are visible before they reach production.
- **Prompt management and playground:** Create prompt versions, compare variants and manage a prompt registry alongside your traces so changes in prompts can be tied back to changes in output quality.
- **Evaluations and datasets:** Score responses with cloud or human annotations, build datasets and run evaluations to measure accuracy and catch quality drops in LLM features.
- **Self-hosting for data control:** Run the same stack on your own infrastructure with Docker and keep all trace data inside your network.

## Primary Use Cases

- **Debug LLM and agent pipelines (AI engineer):** Route traces from your SDK into Langtrace or an existing OpenTelemetry backend to debug failing chains, slow retrievals and unexpected tool calls.
- **Control token and API costs (Platform or FinOps lead):** Track token spend per project, model and user, set budgets and spot the prompt or workflow change that caused a cost spike.
- **Evaluate model and prompt changes (ML engineer):** Build datasets, run automated evaluations and add human annotations so you can prove a prompt change actually improved accuracy.
- **Keep sensitive trace data in-house (Security-minded team):** Self-host Langtrace with Docker to keep trace data inside your own network while still getting dashboards, prompts and evaluations.

## Strengths

- Open source, so the full platform can be inspected, self-hosted and audited
- OpenTelemetry-native traces avoid backend lock-in
- Wide provider and framework integration list out of the box
- Combines tracing, prompt management and evaluations in one product
- Free self-hosted path makes it viable for privacy-sensitive teams

## Limitations

- The public marketing homepage has had availability problems, so product information is spread across docs and GitHub instead
- Traces and metrics live in the Langtrace dashboard unless you self-host or export via OpenTelemetry
- Team collaboration and security guardrails are limited to paid tiers
- Language support today is Python and TypeScript, so other stacks need workarounds

## Frequently Asked Questions

### What is Langtrace?
It is an open-source observability and evaluation tool for LLM applications. You add a lightweight Python or TypeScript SDK to your project and it captures traces and metrics for model calls, frameworks and vector stores.

### How much does Langtrace cost?
There is a free forever Starter plan with up to 10K spans per month, a Growth plan at roughly $39 per user per month for larger volumes, custom enterprise pricing, and a free self-hosted option you run on your own infrastructure.

### Can I use Langtrace with my existing observability stack?
Yes. Traces follow the OpenTelemetry standard, so you can export them to Grafana, Datadog, Honeycomb or another observability stack without routing data through Langtrace.

### Which languages and frameworks are supported?
The official SDKs cover Python and TypeScript/JavaScript, with broad framework support including LangChain, LlamaIndex, LangGraph, LiteLLM and DSPy.

### Can I self-host Langtrace?
Yes. The same codebase that powers the hosted service is published under an AGPL license and can be deployed locally with Docker Compose, and no telemetry leaves your servers.

### What is Langtrace's monthly traffic and growth trend?
Langtrace currently receives 2.9K monthly visits, with a month-over-month traffic change of -2.21K (-43.2% growth rate). Its primary source market is India (52.1% share), including 1.13K direct visits/mo and — organic search visits/mo.

### Is Langtrace free? What is its pricing model?
Langtrace operates on a Freemium pricing model. Free forever Starter tier with up to 10K spans per month for one user; Growth around $39 per user/month including 50K spans with usage-based overage; custom enterprise Scale pricing; and a free self-hosted deployment option. Supported billing and checkout platforms include: not listed.

### What are the best Langtrace alternatives in 2026?
Based on OpenAITools.app category traffic and feature fit, the top five alternatives to Langtrace are: 1. OpenLIT (6.03K visits/mo); 2. LangWatch (52.1K visits/mo); 3. Arize AI (249.03K visits/mo); 4. honeyhive.ai (8.84K visits/mo); 5. Helicone (57.19K visits/mo).

### Which platforms and core AI capabilities does Langtrace support?
Langtrace is classified under AI Developer Tools, AI Monitor, AI Agent, Large Language Models (LLMs), supports the following platforms: Website, and its core capability tags include: Observability, AI Agents, Evaluations, Open Source, LLM, Langchain.

## Alternatives

| Tool Name | Monthly Visits | Pricing Model | Compare |
| :--- | :--- | :--- | :--- |
| [OpenLIT](https://openaitools.app/tool/openlit) | 6,028 | Free | [Compare](https://openaitools.app/compare/langtrace-ai-vs-openlit) |
| [LangWatch](https://openaitools.app/tool/langwatch) | 52,098 | Contact for Pricing | [Compare](https://openaitools.app/compare/langtrace-ai-vs-langwatch) |
| [Arize AI](https://openaitools.app/tool/arize-com) | 249,028 | Paid, Contact for Pricing | [Compare](https://openaitools.app/compare/arize-com-vs-langtrace-ai) |
| [honeyhive.ai](https://openaitools.app/tool/honeyhive-ai) | 8,835 | Freemium, Contact for Pricing | [Compare](https://openaitools.app/compare/honeyhive-ai-vs-langtrace-ai) |
| [Helicone](https://openaitools.app/tool/helicone-ai) | 57,187 | Freemium, Free Trial, Paid, Contact for Pricing, Free | [Compare](https://openaitools.app/compare/helicone-ai-vs-langtrace-ai) |
| [Maxim AI](https://openaitools.app/tool/maxim-ai) | 121,351 | Contact for Pricing, Free Open Source | [Compare](https://openaitools.app/compare/langtrace-ai-vs-maxim-ai) |
| [Future AGI](https://openaitools.app/tool/future-agi) | 121,741 | Freemium, Usage-based | [Compare](https://openaitools.app/compare/future-agi-vs-langtrace-ai) |
| [Portkey](https://openaitools.app/tool/portkey-ai) | 195,650 | Freemium, Paid, Contact for Pricing | [Compare](https://openaitools.app/compare/langtrace-ai-vs-portkey-ai) |
| [Respan](https://openaitools.app/tool/respan) | 91,503 | Freemium | [Compare](https://openaitools.app/compare/langtrace-ai-vs-respan) |
| [Confident AI](https://openaitools.app/tool/confident-ai) | 83,400 | Freemium, Paid, Contact for Pricing | [Compare](https://openaitools.app/compare/confident-ai-vs-langtrace-ai) |
| [Datadog](https://openaitools.app/tool/datadog) | 5,175,760 | Freemium, Free Trial, Paid, Contact for Pricing, Free | [Compare](https://openaitools.app/compare/datadog-vs-langtrace-ai) |
| [PromptLayer](https://openaitools.app/tool/promptlayer) | 85,899 | Free Trial, Contact for Pricing | [Compare](https://openaitools.app/compare/langtrace-ai-vs-promptlayer) |

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Source: https://openaitools.app/tool/langtrace-ai