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Langfuse vs UsageGate

Langfuse provides observability for LLM apps, not usage enforcement.
LangfuseOpen Source Observability & Analytics for LLM Apps 🕵️‍♂️UsageGateUsageGate checks every request

Side by side

What it is
Langfuse:Langfuse is an open-source platform for tracing, evaluating and monitoring LLM applications and AI agents.
UsageGate:UsageGate enforces subscription limits by checking and consuming usage on each request.
Best for
Langfuse:LLM observability & analytics
UsageGate:Per-request usage enforcement for subscription plans
Who it’s for
Langfuse:Developers building, debugging and scaling LLM-based apps and agents.
UsageGate:Developers building SaaS products that need per-feature usage enforcement.
Pricing
Langfuse:Freemium
UsageGate:Freemium
Plans
Langfuse:Hobby Free · Core $29 per month · Pro $199 per month · Enterprise $2499 per month
UsageGate:Free $0 · Hobby $19/mo per month · Pro $79/mo per month · Scale $299/mo per month
Open source
Langfuse:Yes, 35,097 GitHub stars
UsageGate:—
Works with
Langfuse:Python, TypeScript, Go, Java, .NET, Ruby, PHP, Swift
UsageGate:Next.js, Stripe, Redis, TypeScript
DevHunt upvotes
Langfuse:89
UsageGate:0
Launched on DevHunt
Langfuse:Jan 2023
UsageGate:Sep 2026

Langfuse features

  • Hierarchical Traces. Capture every LLM call, tool invocation and retrieval step with filters for user, session, cost and latency.
  • Prompt Management. Version, fetch, release and cache prompts separately from code with one-click deployments.
  • Evaluation Engine. Run LLM-as-judge, heuristic or human-review evaluations on production data or experiments.
  • Experiments & Datasets. Define test cases, run experiments and create golden datasets for continuous improvement.
  • Dashboards & Alerts. Monitor cost, latency and quality via custom dashboards and automated alerts.
  • Human Annotation. Collaborative human-in-the-loop workflows with annotation queues.
  • Extensive Integrations. Supports Python, TypeScript, Go, Java, .NET, Ruby, PHP, Swift and 100+ agent frameworks and model providers.
  • Self-hosted & Cloud Options. Available as hosted SaaS or self-hosted under MIT license.
Langfuse on DevHunt →Alternatives

UsageGate features

  • Access checks. canAccess call verifies if a user can use a feature at request time.
  • Consume credits. Deducts metered units like AI credits or API calls after a successful check.
  • Stripe sync. Automatically syncs with Stripe subscriptions for billing.
  • Redis-backed enforcement. Fast, reliable storage of usage data using Redis.
  • TypeScript SDK. npm package @usagegate/sdk for easy integration in Next.js routes.
  • Plan definition UI. Dashboard lets you create and edit named plans with custom feature limits.
UsageGate on DevHunt →Alternatives

Based on each tool's website and DevHunt data. Details may change; check the official sites.