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LangChain
LangChain vs Vellum
A side-by-side comparison of pricing, ratings, features, pros and cons.
| Overview | |||
| Description | Agent engineering platform and open-source frameworks for building, evaluating, and deploying AI agents in production. | A personal AI assistant with persistent memory that takes real actions across the tools you already use. | |
| Category | |||
| Developer | Langchain | Vellum | |
| Verified Status | No | ||
| Last Updated | Aug 2026 | Aug 2026 | |
| Pricing | |||
| Pricing Model | Free | Open Source | |
| Free Plan | Yes | No | |
| Free Trial | — | No | |
| Open Source | No | Yes | |
| Capabilities | |||
| API Access | — | No | |
| Features | • Open-source agent frameworks: LangChain, LangGraph, deepagents • LangSmith for tracing, evaluation, and observability • SDKs for Python, TypeScript, Go, and Java • Fleet no-code agent builder • OpenTelemetry-compatible tracing • Deployment infrastructure for production agents | • Persistent memory across conversations and over time • Takes real actions: web browsing, file management, code execution, calendar management • Independent identity with its own email, GitHub, and Slack presence • Learns and automates repeatable workflows over time • Available on web, macOS, iOS, CLI, email, Telegram, and Slack • MIT-licensed runtime, self-hostable or Vellum Cloud | |
| Tags | frameworkllmcomposable | vellumpromptengineeringtestingdeploymentteams | |
| Trust and Engagement | |||
| Review Count | 0 | 0 | |
| Saves | 0 | 0 | |
| Views | 78 | 12 | |
| Quality Score | 53/100 | 41/100 | |
| Website Status | Online | Online | |
| Availability | |||
| Website | langchain.com | vellum.ai | |
| Social Links | 2 linked | 4 linked | |
| Screenshots | Yes | No | |
| Reviews | |||
| Pros | • Free to use • Recommended by our editors | • Free to use | |
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Both tools are closely matched on rating — the better fit depends on your specific needs. See the full feature and pricing comparison above.
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