API Tracker vs Langfuse

API Tracker is a web and self-hosted service for tracking and managing the third-party APIs an organization consumes. Its SDK provides analytics on application errors and performance. Reliability features include automatic retries, asynchronous request queuing, failover, and schema-change detection across integrations. Teams can deploy SDKs, a hosted proxy, or on-premises components in a hybrid model. Privacy controls allow payload capture to be disabled and selected fields to be masked. API Tracker, Inc. says customers own their data and control when it is sent to and stored with the service. Audit logs and data-policy controls can help support compliance with CCPA, GDPR, HIPAA, FERPA, PCI, and other privacy regulations. The developer hub documents events, automatic and asynchronous retries, alerts and monitoring, proxy integration, and agent libraries, including Java and Python. Documentation and support are offered for setup and problem solving. The service lists multiple deployment options and web access.

Langfuse is an open-source AI engineering platform for teams debugging, analyzing, and iterating on AI agent applications. Its tracing records prompts, model responses, token use, latency, tool calls, retrieval steps, and metadata. Prompt Management stores, versions, deploys, and tests prompts, then links them to traces. Evaluation features include LLM-as-a-judge, code evaluators, user feedback, manual labeling, datasets, and experiments. Integrations include Python and JS/TS SDKs, OpenTelemetry, an API, CLI, MCP Server, and popular AI frameworks. Teams can self-host the MIT-licensed core on customer infrastructure using Docker, with options including Docker Compose, Kubernetes, AWS, and Azure. Langfuse reports annual SOC 2 Type 2 and ISO 27001 audits, external penetration tests, GDPR compliance, a DPA, and a HIPAA-ready region. Its Cloud traffic uses TLS 1.2+ and stored data uses AES-256 encryption. The free Hobby plan is free and includes 50k units per month, 30 days of data access, two users, and community support via GitHub. Core costs $29 a month, billed monthly.