OpenLIT

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Score7.2

Rank#2 of 32

PriceFree

Free planYes

Runs onAPI, Linux, macOS, Self-hosted, Web, Windows

Summary

OpenLIT is an open-source Agent Harness Engineering platform for LLM tracing, evaluations, prompt management and cost tracking, built on OpenTelemetry. Tracing can capture model calls, tool use and retrievals, with filters for user, session, cost, latency and metadata. Evaluations support an LLM judge, heuristics or human review on production traffic or experiments. Prompt Hub provides prompt versioning, dynamic variables and API retrieval, as well as AI-assisted improvement. OpenGround compares models side by side for latency, tokens and cost, including with a user’s own key. Coding-agent monitoring covers sessions, cost, tokens, repository activity and code impact. The project lists 56+ integrations across LLMs, agent frameworks, vector databases and GPUs. It can be self-hosted with Docker Compose or Kubernetes Helm and receives OpenTelemetry data through OTLP. The Apache 2.0-licensed project says self-hosting keeps prompts, traces and secrets in the user’s environment. Its free OSS plan lists unlimited self-hosted usage, users, projects and environments. The Cloud plan is marked as coming soon, with price and features not listed.

Who it is for

OpenLIT may suit developers who need LLM tracing, evaluations, prompt workflows and cost visibility. It is especially relevant to those who want to self-host and keep prompts and traces in their environment.

What is good

Free OSS plan includes unlimited self-hosted usage.
Tracing covers calls, tools and retrievals.
Evaluations can use human review.
Prompt Hub supports versioning and API retrieval.
Self-hosting supports Docker Compose or Kubernetes Helm.

What to know first

Cloud plan is listed as coming soon.
Community support is via GitHub.
Fleet Hub lists single-cluster collector monitoring.

Verdict

OpenLIT combines observability with prompt management and model evaluation, and its OSS plan is free for self-hosted use. Readers seeking a hosted option should note that Cloud is still listed as coming soon.

OpenLIT plans and pricing

All plans

OSS Free Unlimited self-hosted usage · unlimited users · unlimited projects and environments · community support (GitHub) openlit.io · 29 Sept 2026

Cloud Not published Coming soon · fully hosted · pricing and feature set shared at launch openlit.io · 29 Sept 2026

Compared on AI agent observability tools

Free plan: Yesopenlit.io
Deployment options: self_hostedopenlit.io
Cost tracking: Yesopenlit.io

Facts

What it does: OpenLIT is an open-source Agent Harness Engineering platform for LLM tracing, evaluations, prompt management, and cost tracking, built on OpenTelemetry.openlit.io · 29 Sept 2026
Tracing: LLM tracing can capture calls, tools, and retrievals, with filters for user, session, cost, latency, and metadata.openlit.io · 29 Sept 2026
Evaluations: Evaluations support LLM-as-a-judge, heuristics, or human review on production traffic or experiments.openlit.io · 29 Sept 2026
Prompt Hub: Prompt Hub supports prompt versioning, dynamic variables, API retrieval, unlimited prompt fetching, and AI-assisted improvement.openlit.io · 29 Sept 2026
Model comparison: OpenGround compares models side by side for latency, tokens, and cost, and supports bring-your-own-key model comparison.openlit.io · 29 Sept 2026
Coding agent monitoring: Coding agent observability tracks sessions, cost, tokens, repository activity, and code impact.openlit.io · 29 Sept 2026
Integrations: The site lists 56+ integrations across LLMs, agent frameworks, vector databases, and GPUs, including OpenAI, Anthropic, LangChain, Pinecone, and NVIDIA NIM.openlit.io · 29 Sept 2026
Deployment: The platform can be self-hosted using Docker Compose or Kubernetes Helm and accepts OpenTelemetry data through OTLP.openlit.io · 29 Sept 2026
License and data: OpenLIT is Apache 2.0 licensed, and its site says self-hosting keeps prompts, traces, and secrets in the user's environment.openlit.io · 29 Sept 2026
Secret storage: Vault provides encrypted storage for LLM API keys using AES-256-GCM, with key and tag based retrieval and API authentication.openlit.io · 29 Sept 2026
Security sign-in: The OSS plan lists sign-in with Google, Azure AD, and GitHub.openlit.io · 29 Sept 2026
Support: The OSS plan includes community support on GitHub.openlit.io · 29 Sept 2026
Notable limits: Fleet Hub lists single-cluster collector monitoring, while the self-hosted plan lists unlimited usage, historical data, users, projects, and environments.openlit.io · 29 Sept 2026
Company background: OpenLIT says the project is community-driven, built in public on GitHub, and used by developers worldwide.openlit.io · 29 Sept 2026