Side by side
Langfuse vs PromptLayer
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.
Langfuse brings tracing, prompt workflows, and evaluation features into one AI engineering platform, with both hosted and self-hosted options. The free Hobby plan is limited to two users and 30 days of data access; paid plans add higher limits and support options.
Visit Langfuse
PromptLayer brings prompt editing, evaluation, and operational monitoring into one workflow, with collaboration features for technical and non-technical contributors. The Free plan has defined prompt and playground limits, while larger teams can consider paid plans or Enterprise hosting options.
Visit PromptLayerThe facts
| Langfuse | PromptLayer | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Yes | Not published |
| Runs on | API, Linux, Self-hosted, Web | API, Self-hosted, Web |
| Lowest paid plan | Core: $29 a month | Pro: $49 a month |
| Plans published | 5 | 4 |
| Maker | Not published | Not published |
| Website | langfuse.com | promptlayer.com |
| On prompting tool | #1 of 25 | #4 of 25 |
Langfuse: what it does well
- Tracing captures prompts, latency, tool calls, and retrieval steps.
- Prompt Management versions and tests prompts.
- Evaluation includes datasets, experiments, and user feedback.
- Free Hobby plan includes 50k units monthly.
- Self-hosting options include Docker Compose, Kubernetes, AWS, and Azure.
What to know first
- Hobby includes only two users.
- Hobby data access lasts 30 days.
- Core costs $29 a month, billed monthly.
- Teams Add-on costs $300 a month, billed monthly.
PromptLayer: what it does well
- Edit and deploy prompts without an application redeploy.
- Evaluations include historical backtests and model comparisons.
- Tracks cost, latency, token use, scores, and traces.
- Enterprise supports flexible hosting options.
- Free plan includes 5 users and 2.5k monthly requests.
What to know first
- Free includes only 10 prompts and 10 daily playground runs.
- Webhooks are limited to Team and Enterprise.
- Pro costs $49 a month.
- Team costs $500 a month.
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