Best AI Gateways for ChatGPT

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.

Cyclr is an embedded integration toolkit (embedded iPaaS) for creating, managing and publishing white-labelled integrations directly into your SaaS application. With a low-code, visual integration builder and a fully featured unified API for developers, all teams can impact integration creation and delivery. Flexible deployment methods include an in-app Embedded integration marketplace, where you can push your new integrations live, for your users to self serve, in minutes. Cyclr's fully multi-tenanted architecture helps you scale your integrations with security fully built in - you can even opt for Private deployments (managed or in your infrastructure). Accelerate your AI strategy by Creating and publishing your own MCP Servers too, so you can make your SaaS usable inside LLMs. We help take the hassle out of delivering your users' integration needs.

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.

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.

The Apigene MCP Gateway serves as the essential runtime layer that links AI agents to APIs and MCP servers via the Model Context Protocol. By presenting agent tools, context, skills, and instructions as a unified remote MCP endpoint that is fully managed and regulated, it transforms MCP into a fully-fledged native solution rather than a mere experimental tool. Apigene offers a comprehensive agent foundation layer encapsulated within a single MCP Gateway, enabling agents to connect securely with APIs and MCP servers without the need for bespoke glue code or framework-specific adaptations. Teams can effortlessly construct AI agents using conversational interfaces, specifying which APIs and MCP servers the agents can access, outlining their reasoning processes, and dictating their actions—all without writing code. Additionally, it features intelligent tool selection that effectively pairs the appropriate API or MCP tool with each request, while also allowing for multi-platform deployment across numerous environments, including ChatGPT, Claude, Cursor, Gemini, VS Code, internal copilots, enterprise AI systems, and custom applications. This powerful integration streamlines the development process, making it easier for teams to leverage AI in their projects.

Empower your AI capabilities with ToolRouter, where you can seamlessly connect Claude, ChatGPT, Grok, Gemini, Cursor, Copilot, or another compatible AI to access a vast array of over 226 real tools designed for creation, searching for individuals, and information retrieval. ToolRouter offers a hosted MCP gateway alongside a searchable catalog of tools, all accessible through a single API key and a collective usage-based credit system. While free tools incur no costs, paid options begin at just $0.005 per use, and you can enhance your experience with optional Lite and Plus plans that provide additional monthly credits and increased usage limits. This system not only maximizes the potential of connected AIs but also simplifies the management of resources and costs for users. With ToolRouter, you can expand your AI's functionality and efficiency like never before.

Espressive's Barista LLM Gateway offers businesses a secure and efficient means to incorporate Large Language Models, such as ChatGPT, into their workflows. This gateway serves as a crucial access point for the Barista virtual agent, empowering organizations to implement policies that promote the safe and ethical utilization of LLMs. Additional protective measures may involve monitoring compliance with rules to avoid the dissemination of proprietary code, sensitive personal information, or customer data; restricting access to certain content areas, and ensuring that inquiries remain focused on professional matters; as well as notifying staff about the possibility of inaccuracies in the responses generated by LLMs. By utilizing the Barista LLM Gateway, employees can obtain support for work-related queries spanning 15 different departments, including IT and HR, thereby boosting productivity and fostering greater employee engagement and satisfaction. This comprehensive approach not only enhances operational efficiency but also cultivates a culture of responsible AI usage within the organization.

NanoGPT is a subscription-based AI solution designed to cater to a variety of workflows, offering users comprehensive access to chat, image, video, audio, speech, and embedding models all from a single platform. Its design aims to simplify the user experience for those seeking robust AI models without the hassle of managing multiple subscriptions or accounts, while ensuring that conversation histories remain private by default and providing secure options for handling sensitive information. By integrating models from leading providers such as ChatGPT, Claude, Gemini, DeepSeek, Llama, DALL-E, Stable Diffusion, Flux, Recraft, and others, NanoGPT allows users the flexibility to choose the most suitable tool for their specific tasks. The platform facilitates a wide range of functionalities, including conversations, coding, creative writing, image and video generation, audio production, text-to-speech, web searching, file uploads, and model comparisons, all within a unified interface. Additionally, its model pages offer users the ability to explore and discover various AI language models tailored for conversations, programming, and creative projects, as well as access to image models for artistic endeavors. This versatility makes NanoGPT an invaluable resource for users looking to enhance their creative and professional projects with advanced AI capabilities.

Bifrost serves as a powerful AI gateway that consolidates access to over 20 providers, including OpenAI, Anthropic, AWS, Bedrock, Google Vertex, Azure, and others, all via a single API. It allows for rapid deployment in mere seconds without the need for any configuration, ensuring features such as automatic failover, load balancing, semantic caching, and robust enterprise governance. In rigorous tests handling 5,000 requests per second, Bifrost introduces a minimal overhead of just 11 microseconds for each request, showcasing its efficiency and reliability for high-demand applications. This makes it an ideal choice for organizations looking to streamline their AI integrations while maintaining performance.