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2 / 4 Tools
| Attribute | LangSmith by LangChain Inc. | Fabric by Daniel Miessler |
|---|---|---|
| Category | Developer Tools | Developer Tools Subcategory: AI Prompts & Automation Frameworks |
| Rating & Reviews | ★New / 5.0 0 verified reviews Weighted score: 0.00 | ★New / 5.0 0 verified reviews Weighted score: 0.00 |
| Pricing Model | freemium | open_source |
| Starting Price | Free tier Developer tier free (5,000 traces/mo); Plus at $39/seat/month; Enterprise custom pricing. | 0 Free and open source under the MIT License. Users provide their own API keys for LLM providers (or connect to local Ollama). |
| Platforms | WebAPI | macOS (brew)Linux (curl/yay)Windows (winget/scoop/powershell)DockerGo Binary |
| AI Capabilities | Execution Trace VisualizationAutomated Evaluation BenchmarksLatency & Token Cost MonitoringPrompt Version Control Playground | Modular prompt executionUNIX pipe chainingDynamic multi-provider model routingPattern customizationREST API server mode |
| Overview | Debug, monitor, evaluate, and trace every step of your LLM applications from prototype to production. | Open-source command-line framework and curated prompt repository that applies structured AI patterns to everyday workflows. |
| Tags | observabilitydebugginglangchainevals | promptscliautomationopen-sourcedeveloper-tools |
