Langfuse vs Doppler
Open-source LLM engineering platform — observability, prompts, evals
vs. The secrets management platform for dev teams — sync env vars everywhere
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
Doppler
Developer
$0. 5 users. Unlimited projects + secrets. Community support. For hobby/startups.
$0 base (usage-based)
Team
$18/user/mo. Unlimited projects, audit log, secret sharing, 14-day history.
$18/mo
Business
$36/user/mo. SSO (Google), advanced RBAC, 90-day audit + history, change requests.
$36/mo
Enterprise
Custom. SAML, SCIM, HIPAA, unlimited audit, dedicated support, SLA.
Custom
Free-tier quotas head-to-head
Comparing hobby on Langfuse vs developer on Doppler.
| Metric | Langfuse | Doppler |
|---|---|---|
| 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.
Doppler · 15 features
- Audit Log — Who accessed what, when.
- Auto Rotation — Rotate cloud/API keys.
- Branch Configs — dev/staging/prod as branches.
- Change Requests — PR approvals for prod changes.
- Doppler CLI — Command-line access.
- E2E Encryption — Client-side encryption.
- Local Dev Injection — `doppler run` injects env vars.
- OIDC (CI/CD) — Short-lived tokens for GitHub Actions, etc.
- RBAC — Granular project + config roles.
- SCIM — User provisioning.
- Secret History — Full version history + restore.
- Secret References — Point to secrets from other projects.
- Secrets Sync — Auto-sync to 100+ destinations.
- SSO (Google, SAML) — Enterprise auth.
- Webhooks — Secret-change events.
Developer interfaces
| Kind | Langfuse | Doppler |
|---|---|---|
| CLI | — | doppler CLI |
| SDK | langfuse-js, langfuse-python | @dopplerhq/node-sdk, doppler-sdk (Python) |
| REST | Langfuse REST API | Doppler REST API |
| MCP | Langfuse MCP Server | Doppler MCP |
| OTHER | Langfuse Dashboard, OpenTelemetry endpoint | Doppler Dashboard, Doppler Webhooks, GitHub Actions OIDC |
Staxly is an independent catalog of developer platforms. Some links to Langfuse and Doppler 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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