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Langfuse vs Manifest

Langfuse offers observability for LLM apps, but Manifest also handles request routing, autofix and provider fallback.
LangfuseOpen Source Observability & Analytics for LLM Apps 🕵️‍♂️ManifestA complete backend in a single YAML file

Side by side

What it is
Langfuse:Langfuse is an open-source platform for tracing, evaluating and monitoring LLM applications and AI agents.
Manifest:Manifest is an LLM gateway that routes requests, auto-fixes bad calls, provides fallbacks and observability.
Best for
Langfuse:LLM observability & analytics
Manifest:Auto-fixing LLM requests
Who it’s for
Langfuse:Developers building, debugging and scaling LLM-based apps and agents.
Manifest:Developers building AI-enabled apps who need reliable LLM routing and monitoring.
Pricing
Langfuse:Freemium
Manifest:Freemium
Plans
Langfuse:Hobby Free · Core $29 per month · Pro $199 per month · Enterprise $2499 per month
Manifest:Free $0/month · Pro $19/month
Open source
Langfuse:Yes, 35,097 GitHub stars
Manifest:Yes, 7,549 GitHub stars
Works with
Langfuse:Python, TypeScript, Go, Java, .NET, Ruby, PHP, Swift
Manifest:OpenAI, Anthropic, Google, DeepSeek, AWS Bedrock, Claude, Gemini, Mistral
DevHunt upvotes
Langfuse:89
Manifest:3
Launched on DevHunt
Langfuse:Jan 2023
Manifest:Jun 2025

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

Manifest features

  • Single-endpoint routing. Access all models and providers through one unified endpoint.
  • Autofix. Automatically repairs malformed or failed LLM requests on the fly.
  • Fallback handling. Routes to alternative providers when the primary model is down.
  • Observability dashboard. Tracks request count, tokens, cost and success rates per model.
  • Provider agnostic. Connect any usage-based or subscription LLM provider via API keys.
  • Self-hostable Docker image. MIT-licensed Docker image lets you run Manifest on-premise with no request limits.
Manifest on DevHunt →Alternatives

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