Langfuse vs Penpot
Open-source LLM engineering platform — observability, prompts, evals
vs. Open-source design + prototyping platform — Figma alternative, self-hostable
Pricing tiers
Langfuse
Hobby (Cloud Free)
Free. 50k units/month included. 30 days data access. 2 users. Community support.
Free
Self-Hosted (OSS)
MIT-licensed. Docker Compose or Kubernetes deployment. Unlimited.
$0 base (usage-based)
Core
$29/month. 100k units included ($8 per 100k overage). 90 days retention. Unlimited users. In-app support.
$29/mo
Pro
$199/month. 100k units included + same overage. 3 YEARS retention. Unlimited annotation queues. High rate limits.
$199/mo
Teams Add-on
+$300/month. Adds Enterprise SSO + fine-grained RBAC + dedicated Slack support to Pro.
$300/mo
Enterprise
$2,499/month. Everything + custom rate limits, uptime SLA, dedicated support engineer. Yearly options.
$2499/mo
Penpot
Free (Cloud)
$0. Unlimited files, unlimited projects, unlimited users. Full feature set.
Free
Self-Hosted (OSS)
Free forever. MPL 2.0 license. Docker Compose deploy. Full feature parity with cloud.
$0 base (usage-based)
Enterprise
Custom. Self-hosted support contract, SLA, training.
Custom
Free-tier quotas head-to-head
Comparing hobby on Langfuse vs free on Penpot.
| Metric | Langfuse | Penpot |
|---|---|---|
| No overlapping quota metrics for these tiers. | ||
Features
Langfuse · 16 features
- Annotation Queues — Human reviewers rate traces. Unlimited on Pro+.
- Dashboards — Aggregate metrics, cost, quality across projects.
- Datasets — Curate test sets from production traces. Run experiments.
- EU Cloud Region — GDPR-compliant hosting in EU.
- Evaluations — LLM-as-judge, manual scores, custom model-graded evaluators.
- LLM Cost Tracking — Automatic cost calculation per provider/model.
- OpenTelemetry Native — OTel SDK → Langfuse endpoint works out of box.
- Playground — Test prompts + models + variables live.
- Prompt Management — Version, tag, label prompts. Reference from code by label.
- Public API — Full REST API for ingest, query, prompt management.
- Python @observe decorator — One-line decorator to trace any function.
- Self-Hosting — Docker Compose + k8s Helm chart.
- Sessions — Group related traces (conversations, agent runs).
- Tracing — Capture every LLM call, tool call, nested span with inputs/outputs/cost.
- Users Tracking — Segment traces by user ID, track per-user cost.
- Webhooks — Subscribe to trace completion events.
Penpot · 16 features
- Accessibility Checks — Contrast + color blindness.
- Animations — Transitions + effects.
- Auto Layout — Responsive components.
- Comments — In-file discussion.
- Components + Variants — Reusable elements.
- Design Canvas — Vector drawing + layout.
- Design Tokens (W3C) — Named design variables.
- Figma File Import — Migrate from Figma.
- Flex + Grid Layout — Layout constraints.
- Inspector + Code Export — CSS/HTML/React/Flutter code.
- Native SVG — Not a proprietary blob.
- Plugins API — Extend Penpot.
- Prototyping — Interactive flows.
- Self-Host (MPL-2.0) — Docker deploy.
- Shared Libraries — Team asset libraries.
- Version History — File revisions.
Developer interfaces
| Kind | Langfuse | Penpot |
|---|---|---|
| SDK | langfuse-js, langfuse-python | Penpot Plugins API |
| REST | Langfuse REST API | — |
| MCP | Langfuse MCP Server | — |
| OTHER | Langfuse Dashboard, OpenTelemetry endpoint | Desktop App, Export + Inspect, Penpot Web, Self-Host (Docker) |
Staxly is an independent catalog of developer platforms. Some links to Langfuse and Penpot may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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