Best AI Gateways for OpenAI

OpenRouter is a unified AI inference platform that lets developers connect to a large catalog of models without integrating separately with every model provider. Through one API, users can access models from major AI companies including OpenAI, Google, Anthropic, Meta, Mistral, DeepSeek, Qwen, xAI, and numerous independent providers. The service supports multimodal workloads involving text, images, video, and audio. Developers can use a single account, credit balance, and API key across supported models instead of maintaining separate billing relationships and credentials. OpenRouter's routing infrastructure can prioritize providers based on factors such as price, latency, and reliability. Requests can also be redirected to alternate providers when a preferred endpoint becomes unavailable, helping applications maintain higher uptime. Organizations can configure data policies that restrict prompts to approved models and infrastructure providers. The platform provides benchmarks, model rankings, usage information, documentation, and developer tools for evaluating and deploying different models. OpenRouter is OpenAI API compatible, making it easier for teams to add broad model access to existing AI applications with limited integration changes.

Zapier is a comprehensive AI automation platform that helps organizations transform how work gets done. It allows teams to connect AI tools with everyday apps to automate workflows end to end. Zapier supports AI workflows, custom agents, chatbots, forms, and data tables in one unified system. With over 8,000 integrations, it eliminates manual handoffs between tools and teams. Built-in AI assistance helps users design automations quickly without technical complexity. Zapier enables teams to deploy AI agents that work continuously, even outside business hours. The platform offers full visibility into automation activity with audit logs and analytics. Enterprise-grade security and compliance ensure safe AI adoption at scale. Zapier is used across departments including marketing, sales, IT, and operations. It helps teams save time, reduce costs, and scale productivity with confidence.

Dataiku is a comprehensive enterprise AI platform built to transform how organizations develop, deploy, and manage artificial intelligence at scale. It unifies data, analytics, and machine learning into a centralized environment where both technical and non-technical users can collaborate effectively. The platform enables teams to design and operationalize AI workflows, from data preparation to model deployment and monitoring. With its orchestration capabilities, Dataiku connects various data systems, applications, and processes to streamline operations across the enterprise. It also offers robust governance features that ensure transparency, compliance, and cost control throughout the AI lifecycle. Organizations can build intelligent agents, automate decision-making, and enhance analytics without disrupting existing workflows. Dataiku supports the transition from siloed models to production-ready machine learning systems that can be reused and scaled. Its flexibility allows businesses to modernize legacy analytics while preserving institutional knowledge. Companies across industries leverage the platform to accelerate innovation, improve efficiency, and unlock new revenue opportunities. By combining scalability, governance, and usability, Dataiku empowers enterprises to turn AI into a strategic advantage.

APIPark serves as a comprehensive, open-source AI gateway and API developer portal designed to streamline the management, integration, and deployment of AI services for developers and businesses alike. Regardless of the AI model being utilized, APIPark offers a seamless integration experience. It consolidates all authentication management and monitors API call expenditures, ensuring a standardized data request format across various AI models. When changing AI models or tweaking prompts, your application or microservices remain unaffected, which enhances the overall ease of AI utilization while minimizing maintenance expenses. Developers can swiftly integrate different AI models and prompts into new APIs, enabling the creation of specialized services like sentiment analysis, translation, or data analytics by leveraging OpenAI GPT-4 and customized prompts. Furthermore, the platform’s API lifecycle management feature standardizes the handling of APIs, encompassing aspects such as traffic routing, load balancing, and version control for publicly available APIs, ultimately boosting the quality and maintainability of these APIs. This innovative approach not only facilitates a more efficient workflow but also empowers developers to innovate more rapidly in the AI space.

Kosmoy is the AI management platform for regulated enterprises. Models, copilots and autonomous agents now run in every business unit, on every cloud, from every vendor — and the same gaps appear everywhere: shadow AI nobody registered, governance rebuilt app by app, spend that grows unseen, agents that act faster than any reviewer, and audit evidence scattered across tickets and spreadsheets. These are not five problems. They are one missing control plane. Kosmoy is that control plane, built as four layers. Inventory: four registries — AI systems, models, MCP servers and a master agent registry that pulls agents automatically from Azure AI Foundry, AWS Bedrock, Google Vertex, Salesforce and ServiceNow — each entry with an owner and a risk tier, and anything running unregistered flagged as shadow AI. Monitoring: every call observed — cost, usage and behaviour per model, application and user, with budgets that warn and then block. Governance: one OpenAI-compatible AI Gateway enforcing guardrails, RBAC, routing and logging on every LLM, MCP and agent-to-agent call; the router sends simple prompts to smaller models, and customers regularly cut spend 90% on routable workloads. Action Control: Action Capsules — kernel-enforced sandboxes in your own Kubernetes — contain autonomous agents, MCP servers and private models with just-in-time credentials and a kill switch. The same registries and gateway logs produce audit-ready evidence for the EU AI Act, ISO/IEC 42001 and NIST AI RMF. Kosmoy is self-hosted software, not a SaaS you send prompts to: single-tenant in your own Kubernetes on Azure, AWS, GCP or on-prem, air-gap capable, model-agnostic across OpenAI, Anthropic, Google, Mistral and open-source models. .

LiteLLM serves as a comprehensive platform that simplifies engagement with more than 100 Large Language Models (LLMs) via a single, cohesive interface. It includes both a Proxy Server (LLM Gateway) and a Python SDK, which allow developers to effectively incorporate a variety of LLMs into their applications without hassle. The Proxy Server provides a centralized approach to management, enabling load balancing, monitoring costs across different projects, and ensuring that input/output formats align with OpenAI standards. Supporting a wide range of providers, this system enhances operational oversight by creating distinct call IDs for each request, which is essential for accurate tracking and logging within various systems. Additionally, developers can utilize pre-configured callbacks to log information with different tools, further enhancing functionality. For enterprise clients, LiteLLM presents a suite of sophisticated features, including Single Sign-On (SSO), comprehensive user management, and dedicated support channels such as Discord and Slack, ensuring that businesses have the resources they need to thrive. This holistic approach not only improves efficiency but also fosters a collaborative environment where innovation can flourish.

Plano is a delivery infrastructure solution built specifically for AI agents and agentic applications that require reliability, scalability, and operational visibility. Acting as an AI-native proxy and data plane, the platform manages the underlying infrastructure needed to route requests, orchestrate agents, enforce policies, and monitor interactions. Developers can integrate multiple AI models and model versions through a unified interface without creating custom routing systems for each provider. The platform includes built-in capabilities for observability, guardrail enforcement, context engineering, and intelligent model selection to improve application performance. Teams can use Plano alongside their preferred frameworks, tools, and programming languages while maintaining a consistent infrastructure layer. Rich tracing features provide detailed visibility into agent workflows, helping product and engineering teams identify errors and optimize outcomes. Centralized security controls simplify governance and ensure consistent policy enforcement across AI applications. Support for on-premises deployments also makes the platform suitable for organizations with strict compliance and data residency requirements. Plano helps businesses accelerate the journey from prototype to production by reducing the operational burden of managing AI infrastructure.

LangDB provides a collaborative, open-access database dedicated to various natural language processing tasks and datasets across multiple languages. This platform acts as a primary hub for monitoring benchmarks, distributing tools, and fostering the advancement of multilingual AI models, prioritizing transparency and inclusivity in linguistic representation. Its community-oriented approach encourages contributions from users worldwide, enhancing the richness of the available resources.

LLM Gateway is a completely open-source, unified API gateway designed to efficiently route, manage, and analyze requests directed to various large language model providers such as OpenAI, Anthropic, and Gemini Enterprise Agent Platform, all through a single, OpenAI-compatible endpoint. It supports multiple providers, facilitating effortless migration and integration, while its dynamic model orchestration directs each request to the most suitable engine, providing a streamlined experience. Additionally, it includes robust usage analytics that allow users to monitor requests, token usage, response times, and costs in real-time, ensuring transparency and control. The platform features built-in performance monitoring tools that facilitate the comparison of models based on accuracy and cost-effectiveness, while secure key management consolidates API credentials under a role-based access framework. Users have the flexibility to deploy LLM Gateway on their own infrastructure under the MIT license or utilize the hosted service as a progressive web app, with easy integration that requires only a change to the API base URL, ensuring that existing code in any programming language or framework, such as cURL, Python, TypeScript, or Go, remains functional without any alterations. Overall, LLM Gateway empowers developers with a versatile and efficient tool for leveraging various AI models while maintaining control over their usage and expenses.

TensorBlock is an innovative open-source AI infrastructure platform aimed at making large language models accessible to everyone through two interrelated components. Its primary product, Forge, serves as a self-hosted API gateway that prioritizes privacy while consolidating connections to various LLM providers into a single endpoint compatible with OpenAI, incorporating features like encrypted key management, adaptive model routing, usage analytics, and cost-efficient orchestration. In tandem with Forge, TensorBlock Studio provides a streamlined, developer-friendly workspace for interacting with multiple LLMs, offering a plugin-based user interface, customizable prompt workflows, real-time chat history, and integrated natural language APIs that facilitate prompt engineering and model evaluations. Designed with a modular and scalable framework, TensorBlock is driven by ideals of transparency, interoperability, and equity, empowering organizations to explore, deploy, and oversee AI agents while maintaining comprehensive control and reducing infrastructure burdens. This dual approach ensures that users can effectively leverage AI capabilities without being hindered by technical complexities or excessive costs.

Edgee operates as an AI intermediary that integrates seamlessly with your application and various large language model providers, functioning as an intelligence layer at the edge that minimizes prompt size before they are sent to the model, ultimately decreasing token consumption, lowering expenses, and enhancing response times without requiring alterations to your current codebase. Users can access Edgee via a single API that is compatible with OpenAI, allowing it to implement various edge policies, including smart token compression, routing, privacy measures, retries, caching, and financial oversight, before passing the requests to chosen providers like OpenAI, Anthropic, Gemini, xAI, and Mistral. The advanced token compression feature efficiently eliminates unnecessary input tokens while maintaining the meaning and context, which can lead to a substantial reduction of up to 50% in input tokens, making it particularly beneficial for extensive contexts, retrieval-augmented generation (RAG) workflows, and multi-turn conversations. Furthermore, Edgee allows users to label their requests with bespoke metadata, facilitating the monitoring of usage and expenses by different criteria such as features, teams, projects, or environments, and it sends notifications when there is an unexpected increase in spending. This comprehensive solution not only streamlines interactions with AI models but also empowers users to manage costs and optimize their application’s performance effectively.

ZenMux serves as a robust AI gateway tailored for enterprises, facilitating a seamless interface to access and manage various top-tier large language models via a single account and API. By consolidating multiple providers into one platform, users can interact with leading models from firms such as OpenAI, Anthropic, and Google without the hassle of juggling different keys and integrations. This streamlined approach is designed to enhance efficiency by providing intelligent routing capabilities that automatically determine the optimal model for each specific task, taking into account factors like cost, performance, and reliability. ZenMux prioritizes direct engagement with official providers and certified cloud partners, guaranteeing that all generated outputs originate from credible, high-quality sources, free from proxies or inferior alternatives. Among its standout features is an integrated AI model insurance mechanism that identifies and addresses potential issues, thereby ensuring a smoother user experience. Furthermore, this innovative solution significantly reduces administrative burdens, allowing organizations to focus on leveraging AI technology effectively.

Abliteration.ai serves as an AI platform tailored for developers, granting access to large language models without constraints, all while incorporating a governance layer that empowers teams to dictate model behavior instead of depending on preset limitations from providers. The platform features an API compatible with OpenAI, promoting effortless integration into current tools, SDKs, and processes without necessitating significant infrastructure modifications. Central to Abliteration.ai’s philosophy is the idea of being “unrestricted, not ungoverned,” which allows developers to leverage models with fewer censorships while implementing their own regulatory measures through a Policy Gateway that manages outputs in real-time, enabling actions like allowing, blocking, redacting, or escalating based on tailored policies. These policies are designed as code, facilitating auditing, simulation, and deployment, complemented by capabilities such as shadow testing and rollback measures for added security. Furthermore, Abliteration.ai caters to sophisticated applications, including security assessments, red teaming, synthetic data generation, and research workflows tailored to specific needs, thereby expanding the potential for innovative solutions in various fields. With its comprehensive approach, Abliteration.ai not only enhances the flexibility of AI usage but also ensures that developers maintain control over the ethical implications of their models.

OrcaRouter serves as a routing system for AI models that are compatible with OpenAI, efficiently directing prompts to the appropriate models from a wide array, including OpenAI, Anthropic, Gemini, DeepSeek, Qwen, Kimi, and over 200 other leading and open-source models. Its design aims to maintain the high quality of responses while minimizing costs associated with AI inference by evaluating each prompt and directing complex reasoning tasks to premium models while assigning simpler tasks to more economical open-source options. The routing process is meticulously quality-graded, avoiding arbitrary swaps for cheaper models, and every request clearly indicates the difficulty rating, chosen model, provider, and associated costs, ensuring that routes remain transparent, accountable, and reproducible. Developers can easily switch models by updating the API base URL, while previously established SDKs, model names, and streaming functionalities remain operational. Additionally, OrcaRouter features seamless automatic failover capabilities, allowing for traffic rerouting without interruption should a provider experience downtime, thus preventing disruptions for users. It also offers comprehensive API key management that incorporates spending limits, model allowlists, rate restrictions, and budget compliance, among other functionalities, ensuring robust control over resource usage. This combination of features makes OrcaRouter an indispensable tool for optimizing AI model utilization in various applications.

AIHubMix serves as an all-encompassing API routing platform for AI models, granting users access to prominent language and multimodal models via a single, streamlined interface. By adhering to the OpenAI API format, it enables developers to utilize an API key and a forwarding base URL for AIHubMix, facilitating effortless transitions between various models by merely adjusting the model ID. This service accommodates OpenAI-compatible, Anthropic-compatible, and native Google Gemini interfaces, thereby simplifying the process of transitioning existing applications and leveraging different provider SDKs without the need for extensive integration modifications. The extensive model catalog includes features such as text generation, reasoning, coding capabilities, visual processing, web searching, deep searching, as well as image and video creation, 3D model generation, text-to-speech and speech-to-text conversions, embeddings, reranking, structured output generation, moderation tools, and prompt caching. Users can filter model metadata by criteria like type, input modality, capability, context length, and coding suitability, aiding teams in selecting the most fitting model for their specific needs. This versatility ensures that developers can efficiently adapt to future advancements in AI technology.

Kilo Gateway serves as a versatile AI inference conduit, allowing developers to send Large Language Model (LLM) requests to various providers via a single, standardized endpoint, thus granting them access to a multitude of hosted and open models without the need to modify their applications for different services. It offers seamless access to models from well-known providers, including Anthropic, OpenAI, and Mistral, and accommodates bring-your-own-key setups that empower teams to utilize their existing provider credentials within a centralized framework. The gateway is designed to work with standard AI SDKs, enabling developers to switch providers effortlessly while maintaining the same integration surface. By managing routing intricacies and load balancing between direct providers and external gateways, it enhances system availability and resilience. Additionally, the Auto Model feature intelligently directs each request to the most suitable model, ensuring that routing choices, model performance, and usage metrics remain transparent and manageable for users. This not only streamlines the development process but also provides flexibility as the landscape of AI models continues to evolve.

LMOps is a stack that allows you to launch production-ready applications for monitoring, model management and more. Portkey is a replacement for OpenAI or any other provider APIs. Portkey allows you to manage engines, parameters and versions. Switch, upgrade, and test models with confidence. View aggregate metrics for your app and users to optimize usage and API costs Protect your user data from malicious attacks and accidental exposure. Receive proactive alerts if things go wrong. Test your models in real-world conditions and deploy the best performers. We have been building apps on top of LLM's APIs for over 2 1/2 years. While building a PoC only took a weekend, bringing it to production and managing it was a hassle! We built Portkey to help you successfully deploy large language models APIs into your applications. We're happy to help you, regardless of whether or not you try Portkey!

Kong AI Gateway serves as a sophisticated semantic AI gateway that manages and secures traffic from Large Language Models (LLMs), facilitating the rapid integration of Generative AI (GenAI) through innovative semantic AI plugins. This platform empowers users to seamlessly integrate, secure, and monitor widely-used LLMs while enhancing AI interactions with features like semantic caching and robust security protocols. Additionally, it introduces advanced prompt engineering techniques to ensure compliance and governance are maintained. Developers benefit from the simplicity of adapting their existing AI applications with just a single line of code, which significantly streamlines the migration process. Furthermore, Kong AI Gateway provides no-code AI integrations, enabling users to transform and enrich API responses effortlessly through declarative configurations. By establishing advanced prompt security measures, it determines acceptable behaviors and facilitates the creation of optimized prompts using AI templates that are compatible with OpenAI's interface. This powerful combination of features positions Kong AI Gateway as an essential tool for organizations looking to harness the full potential of AI technology.

Created by LM-SYS, RouteLLM is a publicly available toolkit that enables users to direct tasks among various large language models to enhance resource management and efficiency. It features strategy-driven routing, which assists developers in optimizing speed, precision, and expenses by dynamically choosing the most suitable model for each specific input. This innovative approach not only streamlines workflows but also enhances the overall performance of language model applications.

Orq.ai stands out as the leading platform tailored for software teams to effectively manage agentic AI systems on a large scale. It allows you to refine prompts, implement various use cases, and track performance meticulously, ensuring no blind spots and eliminating the need for vibe checks. Users can test different prompts and LLM settings prior to launching them into production. Furthermore, it provides the capability to assess agentic AI systems within offline environments. The platform enables the deployment of GenAI features to designated user groups, all while maintaining robust guardrails, prioritizing data privacy, and utilizing advanced RAG pipelines. It also offers the ability to visualize all agent-triggered events, facilitating rapid debugging. Users gain detailed oversight of costs, latency, and overall performance. Additionally, you can connect with your preferred AI models or even integrate your own. Orq.ai accelerates workflow efficiency with readily available components specifically designed for agentic AI systems. It centralizes the management of essential phases in the LLM application lifecycle within a single platform. With options for self-hosted or hybrid deployment, it ensures compliance with SOC 2 and GDPR standards, thereby providing enterprise-level security. This comprehensive approach not only streamlines operations but also empowers teams to innovate and adapt swiftly in a dynamic technological landscape.

FastRouter serves as a comprehensive API gateway designed to facilitate AI applications in accessing a variety of large language, image, and audio models (such as GPT-5, Claude 4 Opus, Gemini 2.5 Pro, and Grok 4) through a streamlined OpenAI-compatible endpoint. Its automatic routing capabilities intelligently select the best model for each request by considering important factors like cost, latency, and output quality, ensuring optimal performance. Additionally, FastRouter is built to handle extensive workloads without any imposed query per second limits, guaranteeing high availability through immediate failover options among different model providers. The platform also incorporates robust cost management and governance functionalities, allowing users to establish budgets, enforce rate limits, and designate model permissions for each API key or project. Real-time analytics are provided, offering insights into token utilization, request frequencies, and spending patterns. Furthermore, the integration process is remarkably straightforward; users simply need to replace their OpenAI base URL with FastRouter’s endpoint while configuring their preferences in the user-friendly dashboard, allowing the routing, optimization, and failover processes to operate seamlessly in the background. This ease of use, combined with powerful features, makes FastRouter an indispensable tool for developers seeking to maximize the efficiency of their AI applications.

RouterBase serves as a comprehensive API gateway, allowing developers and teams to utilize over 200 AI models, including well-known options like GPT, Claude, Gemini, Llama, Mistral, and DeepSeek, all through one OpenAI-compatible endpoint. This eliminates the need for managing different keys and billing systems for each model, as switching between them is as simple as changing a single configuration line. Additionally, RouterBase enhances functionality with intelligent routing, built-in failover capabilities across various providers, and consolidated billing, ensuring that your application remains operational even in the event of an upstream provider failure. Moreover, a free tier is offered with no requirement for a credit card, making it accessible for users to explore the service. With RouterBase, developers can streamline their workflow and focus on building innovative applications without the hassle of juggling multiple integrations.

TrustedRouter serves as a privacy-centric AI gateway, enabling developers to interact with over 600 AI models from more than 90 providers via a single API that is compatible with OpenAI. It ensures privacy by routing requests through a verified gateway that refrains from logging any prompt or output data, maintaining a clear separation between the production prompt pathway and the management dashboard, ensuring that even the engineers cannot access the requests made. Developers can seamlessly continue using the OpenAI SDK by simply adjusting one base URL, while they have the flexibility to select either direct model identifiers or routing aliases, which facilitate healthy provider transitions, utilize zero-retention options, ensure secure compute processing, focus on EU-centric routing, and enable multi-model synthesis. Features like provider failover, regional routing, and ongoing model health monitoring are integrated to prevent any single upstream failure from resulting in a service disruption. Operating across major cloud platforms like GCP, AWS, and Azure, TrustedRouter also makes available metrics on latency, availability, source code, deployment infrastructure, SDKs, and trust verification for thorough examination, thus promoting transparency and reliability in its services. This commitment to openness and security builds trust with developers who prioritize privacy in their applications.

You can access models through the integrated Chat UI of the app or by utilizing a local server that is compatible with OpenAI. The minimum specifications required include either an M1, M2, or M3 Mac, or a Windows PC equipped with a processor that supports AVX2 instructions. Additionally, Linux support is currently in beta. A primary advantage of employing a local LLM is the emphasis on maintaining privacy, which is a core feature of LM Studio. This ensures that your information stays secure and confined to your personal device. Furthermore, you have the capability to operate LLMs that you import into LM Studio through an API server that runs on your local machine. Overall, this setup allows for a tailored and secure experience when working with language models.

Undrstnd Developers enables both developers and businesses to create applications powered by AI using only four lines of code. Experience lightning-fast AI inference speeds that can reach up to 20 times quicker than GPT-4 and other top models. Our affordable AI solutions are crafted to be as much as 70 times less expensive than conventional providers such as OpenAI. With our straightforward data source feature, you can upload your datasets and train models in less than a minute. Select from a diverse range of open-source Large Language Models (LLMs) tailored to your unique requirements, all supported by robust and adaptable APIs. The platform presents various integration avenues, allowing developers to seamlessly embed our AI-driven solutions into their software, including RESTful APIs and SDKs for widely-used programming languages like Python, Java, and JavaScript. Whether you are developing a web application, a mobile app, or a device connected to the Internet of Things, our platform ensures you have the necessary tools and resources to integrate our AI solutions effortlessly. Moreover, our user-friendly interface simplifies the entire process, making AI accessibility easier than ever for everyone.