judgeval vs LangChain
judgeval and LangChain are both agent frameworks for Python. judgeval is published by JudgmentLabs and LangChain by LangChain. On GitHub, LangChain has 148,371 stars and judgeval has 1,070. Both were last active in Oct 2026. The table lines up where they differ (publisher, license, GitHub stars and weekly downloads) and has the install commands for both. Everything here comes from the listings' public sources and is refreshed daily. judgeval describes itself as: Python SDK for tracing agents and scoring their traces with prompt-based judges, to find failures in production. LangChain: Python framework of interoperable components and integrations for building agents and LLM apps, with LangGraph and Deep Agents layered above it. Licenses: judgeval Apache-2.0, LangChain MIT.
Updated Oct 26, 2026 · Built from catalog data; how we rank and grade
judgeval
JudgmentLabs
Python SDK for tracing agents and scoring their traces with prompt-based judges, to find failures in production.
LangChain
LangChain
Python framework of interoperable components and integrations for building agents and LLM apps, with LangGraph and Deep Agents layered above it.
Who should pick which
- LangChain has the larger community: 148,371 GitHub stars against 1,070.
From listing data only. We don't pick a winner on security beyond the grades; read how grades work.
Side by side
| Fact | judgeval | LangChain |
|---|---|---|
| Type | Harness | Harness |
| Publisher | JudgmentLabs | LangChain |
| License | Apache-2.0 | MIT |
| Pricing | Not stated | Not stated |
| Runs | Not stated | Not stated |
| Auth | Not stated | Not stated |
| Hosts supported | Not stated | Not stated |
| Tools | Not listed yet | Not listed yet |
| Security grade | –Security: not graded yet | –Security: not graded yet |
| Freshness grade | AFreshness: A | AFreshness: A |
| GitHub stars | 1,070 | 148,371 |
| Weekly downloads | 77,683 | 37,334,710 |
| Last release | Oct 21, 2026 | Oct 22, 2026 |
| Last activity | Oct 23, 2026 | Oct 24, 2026 |
Facts from each listing's public sources, checked daily. Tool lists arrive with tool scans.
Install
judgeval
pip install judgeval
LangChain
pip install langchain
Also consider
- 0.853score
LlamaIndex
LlamaIndex
Open-source Python toolkit for RAG and agents over your own data, with event-driven workflows and 300+ integration packages.
HarnessAFreshness: A★ 52.6K↓ 1.4M/wk - 0.748score
LangGraph
LangChain
Low-level Python orchestration framework for long-running stateful agents, with durable execution, human review points and short- and long-term memory.
HarnessAFreshness: A★ 43.8K↓ 13.1M/wk - 0.732score
CrewAI
CrewAI
Open-source Python framework for multi-agent workflows, with role-based Crews and event-driven Flows.
HarnessAFreshness: A★ 60.1K↓ 644.6K/wk
Questions
- Is judgeval or LangChain more popular?
- LangChain has more GitHub stars (148,371 against 1,070). Stars measure attention, not quality, so check freshness and docs too.
- Are judgeval and LangChain open source?
- Yes: judgeval is Apache-2.0 and LangChain is MIT.
Related
Cite this page
judgeval vs LangChain. Agent Mart. https://agentmart.dev/compare/judgeval-vs-langchain (last updated 2026-10-26)