Langfuse
8.1#1 in ai agent observability toolsFrom $29 a monthFree planWebAPILinuxSelf-hosted
VisitLangfuse vs SpacePrompts
SpacePrompts
6.6#14 in ai prompt management softwareFrom $5 a monthFree planWebAPIExtension
VisitWhat both publish
| Fact | Langfuse | SpacePrompts |
|---|---|---|
| API | The public data platform includes APIs for observations, experiments, metrics, prompts, datasets, projects, exports, and an OpenAPI specification. | The API can retrieve and run prompts, count tokens, and enhance prompts; access is available on Pro and Team plans and limited to 60 requests per minute per API key. |
| Evaluation | Evaluation features include LLM-as-a-judge, code evaluators, user feedback, manual labeling, datasets, and experiments. | The Evaluator scores prompts, identifies weak areas, and offers guidance to improve them. |
| Integrations | Langfuse lists more than 100 integrations spanning OpenTelemetry, Python and TypeScript, model providers, agent frameworks, gateways, and developer tools. | The privacy policy lists Google, GitHub, and Microsoft as OAuth providers for account authentication. |
| Product | Langfuse is an open-source AI engineering platform that helps teams collaboratively debug, analyze, and iterate on AI agent applications. | SpacePrompts is a prompt management platform for saving, organizing, running, versioning, and reusing AI prompts. |
Langfuse plans
- HobbyFree
- HobbyFree
- Core$29 a month
- Core$29 a month
- Pro$199 a month
- Pro$199 a month
SpacePrompts plans
- FreeFree
- Pro$5 a month
- Team$9 a month
Pick Langfuse if…
Langfuse suits teams building AI agent applications that need tracing, prompt management, and evaluation tools. It also supports teams that want to self-host the core on their own infrastructure.
Pick SpacePrompts if…
It suits people and teams who work with AI prompts, including designers, writers, marketers, and API automation users. Teams needing shared libraries and role-based permissions can consider the Team plan.