KeepRouter vs Langfuse
KeepRouter
keeprouter.com
Langfuse
langfuse.comSide by side
| Figure | KeepRouter | Langfuse |
|---|---|---|
| Price from | Free | $29/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 2 | 10 |
| Spec score · API Analytics Software | 7.5 (#14) | 8.7 (#2) |
| Integrations | The Free model page documents configuration paths for OpenCode and Continue using KeepRouter's OpenAI-compatible base URL. | Langfuse lists more than 100 integrations spanning OpenTelemetry, Python and TypeScript, model providers, agent frameworks, gateways, and developer tools. |
| Observability | The request log records timestamp, model, route, HTTP status, token counts, cost, cache state and latency without storing prompt or completion bodies. | Hierarchical traces capture LLM calls, tool invocations, and retrieval steps, with filtering by user, session, cost, latency, and metadata. |
| Product | KeepRouter is an independently operated API gateway that provides one account for models from more than one provider. | Langfuse is an open-source AI engineering platform that helps teams collaboratively debug, analyze, and iterate on AI agent applications. |
| Support | Support is available at [email protected], including for vulnerability reports and DPA discussions. | Hobby includes community support via GitHub, Core includes in-app support, Pro includes prioritized in-app support, and Enterprise includes support SLA and a named lead support engineer. |
Plans
Langfuse
- HobbyFree
- HobbyFree
- Core$29 a month
- Core$29 a month
- Pro$199 a month
- Pro$199 a month
- Teams Add-on$300 a month
- Teams Add-on$300 a month
- Enterprise$2,499 a month
- Enterprise$2,499 a month
In their own words
KeepRouter
KeepRouter is a cloud API gateway that puts models from multiple providers behind one account. Its compatible chat models accept OpenAI Chat Completions requests at /v1/chat/completions and Anthropic Messages requests at /v1/messages, including use with Claude Code and the Anthropic SDK. The production catalog lists 101 models with public customer prices and supported endpoints. It covers text, image, video and speech output, with billing units varying by modality. The model named free charges $0.0000 per 1M input tokens and $0.0000 per 1M output tokens, supporting chat completions, streaming and tool calling where available. Paid usage uses prepaid USD credit rather than a recurring subscription. Keys can be restricted to model allowlists, while the raw key appears once at creation. Logs capture request operations without prompt or completion bodies. KeepRouter runs on Cloudflare’s global edge network, supports OpenCode and Continue setup, and says customer data is not used for model training.
Langfuse
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.