Side by side
LangSmith vs PromptOps Manager
Both stand on prompting tool. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxMac+3
LangSmith combines agent evaluation with prompt tools and observability, including cost and trajectory tracking. Teams should account for trace-retention limits and the pay-as-you-go structure when comparing plans.
Visit LangSmith Free plan APISelf-hostedWeb
PromptOps Manager provides a self-hosted workflow for prompt versions, tests, and environment promotion. Its unauthenticated resolve endpoint and roadmap status for team features are important considerations.
Visit PromptOps ManagerThe facts
| LangSmith | PromptOps Manager | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | No | Not published |
| Runs on | API, Linux, Mac, Self-hosted, Web, Windows | API, Self-hosted, Web |
| Lowest paid plan | See the plans | Free or on request |
| Plans published | 3 | 1 |
| Maker | Not published | Not published |
| Website | langchain.com | github.com |
| On prompting tool | #2 of 25 | #6 of 25 |
LangSmith: what it does well
- Offline and real-time evaluation options
- Human, heuristic, LLM, pairwise, and custom evaluators
- Tracing includes cost tracking and trajectory monitoring
- Free Developer plan with up to 5k base traces monthly
- Enterprise offers self-hosted and hybrid deployment
What to know first
- Base traces have 14-day retention
- Extended 180-day retention costs extra
- Developer includes one seat and community support
PromptOps Manager: what it does well
- Free and MIT licensed for self-hosting.
- Prompt changes receive numbered versions.
- Versions can be promoted by environment.
- Tests include regex and LLM-based assertions.
- Public resolve endpoint supports apps and scripts.
What to know first
- Resolve endpoint requires no authentication by design.
- Docker 24.0 and Docker Compose v2 are prerequisites.
- Team roles, CLI, and GitHub Actions are roadmap items.
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