Best Free AI Agent Observability Tools of 2026

Around 25 million engineers work across dozens of distinct functions. Engineers are using New Relic as every company is becoming a software company to gather real-time insight and trending data on the performance of their software. This allows them to be more resilient and provide exceptional customer experiences. New Relic is the only platform that offers an all-in one solution. New Relic offers customers a secure cloud for all metrics and events, powerful full-stack analytics tools, and simple, transparent pricing based on usage. New Relic also has curated the largest open source ecosystem in the industry, making it simple for engineers to get started using observability.

Langfuse is a free and open-source LLM engineering platform that helps teams to debug, analyze, and iterate their LLM Applications. Observability: Incorporate Langfuse into your app to start ingesting traces. Langfuse UI : inspect and debug complex logs, user sessions and user sessions Langfuse Prompts: Manage versions, deploy prompts and manage prompts within Langfuse Analytics: Track metrics such as cost, latency and quality (LLM) to gain insights through dashboards & data exports Evals: Calculate and collect scores for your LLM completions Experiments: Track app behavior and test it before deploying new versions Why Langfuse? - Open source - Models and frameworks are agnostic - Built for production - Incrementally adaptable - Start with a single LLM or integration call, then expand to the full tracing for complex chains/agents - Use GET to create downstream use cases and export the data

Taam Cloud is a comprehensive platform for integrating and scaling AI APIs, providing access to more than 200 advanced AI models. Whether you're a startup or a large enterprise, Taam Cloud makes it easy to route API requests to various AI models with its fast AI Gateway, streamlining the process of incorporating AI into applications. The platform also offers powerful observability features, enabling users to track AI performance, monitor costs, and ensure reliability with over 40 real-time metrics. With AI Agents, users only need to provide a prompt, and the platform takes care of the rest, creating powerful AI assistants and chatbots. Additionally, the AI Playground lets users test models in a safe, sandbox environment before full deployment. Taam Cloud ensures that security and compliance are built into every solution, providing enterprises with peace of mind when deploying AI at scale. Its versatility and ease of integration make it an ideal choice for businesses looking to leverage AI for automation and enhanced functionality.

Monitor expenses, usage, and latency for GPT applications seamlessly with just one line of code. Renowned organizations that leverage OpenAI trust our service. We are expanding our support to include Anthropic, Cohere, Google AI, and additional platforms in the near future. Stay informed about your expenses, usage patterns, and latency metrics. With Helicone, you can easily integrate models like GPT-4 to oversee API requests and visualize outcomes effectively. Gain a comprehensive view of your application through a custom-built dashboard specifically designed for generative AI applications. All your requests can be viewed in a single location, where you can filter them by time, users, and specific attributes. Keep an eye on expenditures associated with each model, user, or conversation to make informed decisions. Leverage this information to enhance your API usage and minimize costs. Additionally, cache requests to decrease latency and expenses, while actively monitoring errors in your application and addressing rate limits and reliability issues using Helicone’s robust features. This way, you can optimize performance and ensure that your applications run smoothly.

Athina functions as a collaborative platform for AI development, empowering teams to efficiently create, test, and oversee their AI applications. It includes a variety of features such as prompt management, evaluation tools, dataset management, and observability, all aimed at facilitating the development of dependable AI systems. With the ability to integrate various models and services, including custom solutions, Athina also prioritizes data privacy through detailed access controls and options for self-hosted deployments. Moreover, the platform adheres to SOC-2 Type 2 compliance standards, ensuring a secure setting for AI development activities. Its intuitive interface enables seamless collaboration between both technical and non-technical team members, significantly speeding up the process of deploying AI capabilities. Ultimately, Athina stands out as a versatile solution that helps teams harness the full potential of artificial intelligence.

OpenLIT serves as an observability tool that is fully integrated with OpenTelemetry, specifically tailored for application monitoring. It simplifies the integration of observability into AI projects, requiring only a single line of code for setup. This tool is compatible with leading LLM libraries, such as those from OpenAI and HuggingFace, making its implementation feel both easy and intuitive. Users can monitor LLM and GPU performance, along with associated costs, to optimize efficiency and scalability effectively. The platform streams data for visualization, enabling rapid decision-making and adjustments without compromising application performance. OpenLIT's user interface is designed to provide a clear view of LLM expenses, token usage, performance metrics, and user interactions. Additionally, it facilitates seamless connections to widely-used observability platforms like Datadog and Grafana Cloud for automatic data export. This comprehensive approach ensures that your applications are consistently monitored, allowing for proactive management of resources and performance. With OpenLIT, developers can focus on enhancing their AI models while the tool manages observability seamlessly.

Introducing a premier developer platform designed for the testing and debugging of AI agents, we provide the essential tools so you can focus on innovation. With our system, you can visually monitor events like LLM calls, tool usage, and the interactions of multiple agents. Additionally, our rewind and replay feature allows for precise review of agent executions at specific moments. Maintain a comprehensive log of data, encompassing logs, errors, and prompt injection attempts throughout the development cycle from prototype to production. Our platform seamlessly integrates with leading agent frameworks, enabling you to track, save, and oversee every token your agent processes. You can also manage and visualize your agent's expenditures with real-time price updates. Furthermore, our service enables you to fine-tune specialized LLMs at a fraction of the cost, making it up to 25 times more affordable on saved completions. Create your next agent with the benefits of evaluations, observability, and replays at your disposal. With just two simple lines of code, you can liberate yourself from terminal constraints and instead visualize your agents' actions through your AgentOps dashboard. Once AgentOps is configured, every execution of your program is documented as a session, ensuring that all relevant data is captured automatically, allowing for enhanced analysis and optimization. This not only streamlines your workflow but also empowers you to make data-driven decisions to improve your AI agents continuously.

Maxim is a enterprise-grade stack that enables AI teams to build applications with speed, reliability, and quality. Bring the best practices from traditional software development to your non-deterministic AI work flows. Playground for your rapid engineering needs. Iterate quickly and systematically with your team. Organise and version prompts away from the codebase. Test, iterate and deploy prompts with no code changes. Connect to your data, RAG Pipelines, and prompt tools. Chain prompts, other components and workflows together to create and test workflows. Unified framework for machine- and human-evaluation. Quantify improvements and regressions to deploy with confidence. Visualize the evaluation of large test suites and multiple versions. Simplify and scale human assessment pipelines. Integrate seamlessly into your CI/CD workflows. Monitor AI system usage in real-time and optimize it with speed.

Laminar is a comprehensive open-source platform designed to facilitate the creation of top-tier LLM products. The quality of your LLM application is heavily dependent on the data you manage. With Laminar, you can efficiently gather, analyze, and leverage this data. By tracing your LLM application, you gain insight into each execution phase while simultaneously gathering critical information. This data can be utilized to enhance evaluations through the use of dynamic few-shot examples and for the purpose of fine-tuning your models. Tracing occurs seamlessly in the background via gRPC, ensuring minimal impact on performance. Currently, both text and image models can be traced, with audio model tracing expected to be available soon. You have the option to implement LLM-as-a-judge or Python script evaluators that operate on each data span received. These evaluators provide labeling for spans, offering a more scalable solution than relying solely on human labeling, which is particularly beneficial for smaller teams. Laminar empowers users to go beyond the constraints of a single prompt, allowing for the creation and hosting of intricate chains that may include various agents or self-reflective LLM pipelines, thus enhancing overall functionality and versatility. This capability opens up new avenues for experimentation and innovation in LLM development.

Phoenix serves as a comprehensive open-source observability toolkit tailored for experimentation, evaluation, and troubleshooting purposes. It empowers AI engineers and data scientists to swiftly visualize their datasets, assess performance metrics, identify problems, and export relevant data for enhancements. Developed by Arize AI, the creators of a leading AI observability platform, alongside a dedicated group of core contributors, Phoenix is compatible with OpenTelemetry and OpenInference instrumentation standards. The primary package is known as arize-phoenix, and several auxiliary packages cater to specialized applications. Furthermore, our semantic layer enhances LLM telemetry within OpenTelemetry, facilitating the automatic instrumentation of widely-used packages. This versatile library supports tracing for AI applications, allowing for both manual instrumentation and seamless integrations with tools like LlamaIndex, Langchain, and OpenAI. By employing LLM tracing, Phoenix meticulously logs the routes taken by requests as they navigate through various stages or components of an LLM application, thus providing a clearer understanding of system performance and potential bottlenecks. Ultimately, Phoenix aims to streamline the development process, enabling users to maximize the efficiency and reliability of their AI solutions.

Lunary serves as a platform for AI developers, facilitating the management, enhancement, and safeguarding of Large Language Model (LLM) chatbots. It encompasses a suite of features, including tracking conversations and feedback, analytics for costs and performance, debugging tools, and a prompt directory that supports version control and team collaboration. The platform is compatible with various LLMs and frameworks like OpenAI and LangChain and offers SDKs compatible with both Python and JavaScript. Additionally, Lunary incorporates guardrails designed to prevent malicious prompts and protect against sensitive data breaches. Users can deploy Lunary within their VPC using Kubernetes or Docker, enabling teams to evaluate LLM responses effectively. The platform allows for an understanding of the languages spoken by users, experimentation with different prompts and LLM models, and offers rapid search and filtering capabilities. Notifications are sent out when agents fail to meet performance expectations, ensuring timely interventions. With Lunary's core platform being fully open-source, users can choose to self-host or utilize cloud options, making it easy to get started in a matter of minutes. Overall, Lunary equips AI teams with the necessary tools to optimize their chatbot systems while maintaining high standards of security and performance.

Traceloop is an all-encompassing observability platform tailored for the monitoring, debugging, and quality assessment of outputs generated by Large Language Models (LLMs). It features real-time notifications for any unexpected variations in output quality and provides execution tracing for each request, allowing for gradual implementation of changes to models and prompts. Developers can effectively troubleshoot and re-execute production issues directly within their Integrated Development Environment (IDE), streamlining the debugging process. The platform is designed to integrate smoothly with the OpenLLMetry SDK and supports a variety of programming languages, including Python, JavaScript/TypeScript, Go, and Ruby. To evaluate LLM outputs comprehensively, Traceloop offers an extensive array of metrics that encompass semantic, syntactic, safety, and structural dimensions. These metrics include QA relevance, faithfulness, overall text quality, grammatical accuracy, redundancy detection, focus evaluation, text length, word count, and the identification of sensitive information such as Personally Identifiable Information (PII), secrets, and toxic content. Additionally, it provides capabilities for validation through regex, SQL, and JSON schema, as well as code validation, ensuring a robust framework for the assessment of model performance. With such a diverse toolkit, Traceloop enhances the reliability and effectiveness of LLM outputs significantly.

Kanvo offers a seamless JavaScript SDK that enhances LangGraph-based AI agents with integrated memory, observability, and resilience, all without the need for any infrastructure setup. The SDK allows developers to integrate just a few lines of code to activate features such as persistent memory for storing facts, preferences, and goals, as well as threaded conversations for multi-user engagement and real-time monitoring of agent activities, which records every interaction, tool usage, and LLM output. Its innovative time-travel debugging capabilities enable users to checkpoint, rewind, and restore any agent's run state with ease, ensuring that workflows are easily reproducible and errors can be swiftly identified. Built with an emphasis on efficiency and user-friendliness, Convo's streamlined interface paired with its MIT-licensed SDK provides developers with production-ready, easily debuggable agents straight from installation, while also ensuring that data control remains entirely with the users. This combination of features positions Kanvo as a powerful tool for developers looking to create sophisticated AI applications without the typical complexities associated with data management.

Vivgrid serves as a comprehensive development platform tailored for AI agents, focusing on critical aspects such as observability, debugging, safety, and a robust global deployment framework. It provides complete transparency into agent activities by logging prompts, memory retrievals, tool interactions, and reasoning processes, allowing developers to identify and address any points of failure or unexpected behavior. Furthermore, it enables the testing and enforcement of safety protocols, including refusal rules and filters, while facilitating human-in-the-loop oversight prior to deployment. Vivgrid also manages the orchestration of multi-agent systems equipped with stateful memory, dynamically assigning tasks across various agent workflows. On the deployment front, it utilizes a globally distributed inference network to guarantee low-latency execution, achieving response times under 50 milliseconds, and offers real-time metrics on latency, costs, and usage. By integrating debugging, evaluation, safety, and deployment into a single coherent framework, Vivgrid aims to streamline the process of delivering resilient AI systems without the need for disparate components in observability, infrastructure, and orchestration, ultimately enhancing efficiency for developers. This holistic approach empowers teams to focus on innovation rather than the complexities of system integration.

AgentScope is a platform driven by AI that focuses on agent observability and operations, delivering insights, governance, and performance metrics for autonomous AI agents operating in production environments. This platform empowers engineering and DevOps teams to oversee, troubleshoot, and enhance intricate multi-agent applications instantly by gathering comprehensive telemetry about agent activities, choices, resource consumption, and the quality of outcomes. Featuring advanced dashboards and timelines, AgentScope enables teams to track execution paths, pinpoint bottlenecks, and gain insights into the interactions between agents and external systems, APIs, and data sources, thereby enhancing the debugging process and ensuring reliability in autonomous workflows. It also includes customizable alerting, log aggregation, and structured views of events, allowing teams to swiftly identify unusual behaviors or errors within distributed fleets of agents. Beyond immediate monitoring, AgentScope offers tools for historical analysis and reporting that aid teams in evaluating performance trends and detecting model drift. By providing this comprehensive suite of features, AgentScope enhances the overall efficiency and effectiveness of managing autonomous agent systems.

Fluq serves as an observability and orchestration platform for AI agents, providing teams with comprehensive real-time visibility and control over their operations. It functions as an integrated “single pane of glass” that meticulously tracks and visualizes every action performed by agents, including LLM calls, tool usage, file handling, token expenditure, and related costs through intricate waterfall traces. By utilizing a lightweight proxy to manage all agent requests, Fluq ensures minimal setup requirements and is compatible with any LLM provider or agent framework, facilitating seamless integration into existing systems without the need for code modifications. This platform empowers teams to analyze every decision made by an agent, investigate execution steps, and gain a clear understanding of how outcomes are derived, thereby enhancing transparency and ease of debugging. Furthermore, it incorporates governance capabilities such as policy enforcement, spending limits, approval gates, and access controls, which help mitigate risks like excessive costs, misuse of tools, and generation of incorrect outputs. Through these robust features, Fluq not only improves operational oversight but also fosters trust in AI systems by ensuring responsible usage and accountability.

Braintrust is a powerful AI observability and evaluation platform built to help organizations monitor, analyze, and improve the performance of their AI systems in real-world environments. It captures detailed production traces, giving teams visibility into prompts, outputs, tool calls, and system behavior in real time. The platform enables users to evaluate AI performance using automated scoring, human feedback, or custom metrics to ensure consistent quality. Braintrust helps detect issues such as hallucinations, latency spikes, and regressions before they affect end users. It also allows teams to compare prompts and models side by side, making it easier to refine and optimize AI workflows. With scalable infrastructure, Braintrust can handle large volumes of AI trace data efficiently. The platform integrates seamlessly with existing development tools and supports multiple programming languages. It includes features like automated alerts and performance monitoring to proactively identify problems. Braintrust also supports building evaluation datasets directly from production data, improving testing accuracy. Its flexible and framework-agnostic design ensures compatibility with any AI stack. Overall, Braintrust empowers teams to continuously improve AI systems while maintaining reliability and performance at scale.