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What is Fallom?

Fallom is an LLM observability platform that gives you complete visibility into your AI applications. Understand what’s happening in production, debug issues fast, and optimize costs.

🔍 Observability

Every LLM call traced with tokens, latency, costs, prompts, and completions

📊 Session Analytics

Group calls by user or conversation. See the full picture.

🧪 A/B Testing

Test models and prompts in production with traffic splitting

📋 Evals

Run evaluations on your LLM outputs at scale

Get started in 2 minutes

Add 3 lines of code and start seeing your LLM calls.

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How It Works

import fallom from "@fallom/trace";

await fallom.init({ apiKey: process.env.FALLOM_API_KEY });
const session = fallom.session({ configKey: "my-app", sessionId: "user-123" });

// Wrap your LLM client - that's it
const openai = session.wrapOpenAI(new OpenAI());
Every call through openai is now automatically traced to your dashboard.

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Supported Providers

Works with any OpenAI-compatible API:
  • OpenAI - GPT-4o, GPT-4, GPT-3.5
  • Anthropic - Claude 3.5, Claude 3
  • Google - Gemini Pro, Gemini Flash
  • OpenRouter - Access 100+ models
  • Vercel AI SDK - Full framework support

Python

pip install fallom

TypeScript

npm install @fallom/trace