Open Source Kong AI Gateway Alternatives

A comprehensive LLM gateway that simplifies access to over 100 language models including OpenAI, Azure, Anthropic, Gemini, and Bedrock through a unified OpenAI-compatible interface.

Key capabilities include:

• Unified API Access - Connect to 100+ LLM providers through a single OpenAI-format interface
• Cost Management - Track spending, set budgets, and implement rate limits across teams and projects
• Load Balancing & Fallbacks - Automatic failover between models and providers for high availability
• Enterprise Security - JWT authentication, SSO integration, and comprehensive audit logging
• Observability - Integration with Langfuse, Langsmith, and OpenTelemetry for monitoring

Trusted by industry leaders like Netflix, Lemonade, and RocketMoney who use it to provide developers with Day 0 LLM access while maintaining cost control and operational efficiency. The platform has served over 1 billion requests with 80% uptime and is backed by 425+ contributors.

Perfect for platform teams who need to democratize LLM access across their organization while maintaining governance, cost visibility, and reliability. Available as both open source and enterprise solutions with custom SLAs and dedicated support.

Portkey provides a comprehensive production stack that equips AI teams with everything needed to deploy and scale generative AI applications. The platform combines AI Gateway, Observability, Guardrails, Governance, and Prompt Management in a single, integrated solution.

Key Features:

• Unified API Access: Connect to 1,600+ LLMs through a single interface, eliminating integration complexity
• Real-time Observability: Monitor LLM behavior, catch anomalies early, and manage usage proactively with comprehensive dashboards
• Enterprise Security: Built-in guardrails, PII redaction, and RBAC ensure secure AI deployment
• Cost Optimization: Advanced caching, budget controls, and resource monitoring help reduce AI expenses significantly
• 3-Line Integration: Deploy in minutes without changing existing code infrastructure

Production Benefits:

• 99.999% uptime with strict SLAs for mission-critical applications
• Sub-millisecond latency through lightweight, performant gateway architecture
• 50% faster time-to-market with full-stack LLMOps capabilities
• Enterprise governance with detailed activity logs and compliance features

Trusted by 3,000+ AI teams and processing billions of tokens daily, Portkey serves both Fortune 500 companies and startups. The platform includes Model Context Protocol support for advanced agent workflows and offers seamless collaboration tools with role-based access control.

Ultra-high performance AI gateway built for enterprise-scale applications. With just 20 microseconds added latency and 5,000 requests per second throughput, it delivers exceptional speed while maintaining enterprise-grade reliability.

Key performance advantages:

• 50x faster than LiteLLM with 54x better P99 latency
• 68% less memory usage for optimal resource efficiency
• 9.5x higher throughput with 11.22% better success rates
• 99.99% uptime through automatic provider fallback

Comprehensive model access to over 1000+ AI models from 8+ providers including OpenAI, Anthropic, Google, and custom deployments through a unified interface. Drop-in replacement requiring just one line of code change - compatible with existing OpenAI, Anthropic, LiteLLM, LangChain, and Vercel AI SDK implementations.

Enterprise-ready features include virtual key management with independent budgets, real-time guardrails for model protection, built-in MCP gateway for tool management, and comprehensive governance with SSO integration. Built-in observability with OpenTelemetry support and dashboard for monitoring without complex setup.

Open-source with Apache 2.0 license, active Discord community support, and 14-day free enterprise trial available.

Envoy AI Gateway is a community-driven open source project that leverages the power of Envoy Gateway to intelligently route and manage request traffic between application clients and GenAI services. Built collaboratively by the open source community, this solution addresses the growing need for reliable GenAI traffic handling.

Key Features:

• Multi-Provider Support: Routes traffic to 16+ LLM providers out of the box, including OpenAI, Anthropic, AWS Bedrock, Azure OpenAI, Google Gemini, and more
• Enterprise-Ready: Built on proven Envoy technology trusted by organizations worldwide
• Community-Driven: Actively maintained with regular releases and community meetings
• Production-Tested: Already adopted by organizations for real-world GenAI workloads

The project offers seamless integration with major AI providers like Cohere, DeepInfra, Groq, Mistral, SambaNova, and Vertex AI, making it easy to switch between providers or implement multi-provider strategies. With its latest v0.4 release, the gateway continues to expand capabilities and provider integrations.

Join the growing community through Slack, GitHub discussions, and weekly community meetings to contribute to this essential piece of GenAI infrastructure.

Route, manage, and analyze your LLM requests across multiple providers with a unified API interface that's compatible with the OpenAI API format for seamless migration.

Key Features:

• Unified API Interface - Compatible with OpenAI API format for easy integration
• Multi-provider Support - Connect to OpenAI, Anthropic, Google, and more through one gateway
• Usage Analytics - Track requests, tokens, response times, and costs across all providers
• Performance Monitoring - Compare different models' performance and cost-effectiveness
• Secure Key Management - Manage API keys for different providers in one secure place
• Self-hosted or Cloud - Deploy on your infrastructure or use hosted version

Simple Integration - Just change your API endpoint and keep your existing code. Works with any language or framework including Python, TypeScript, Java, Rust, Go, PHP, and Ruby.

Flexible Pricing:

• Self-Host: 100% free forever with full control over your data
• Free Plan: Access to all models with 5% gateway fee
• Pro Plan: $50/month with zero fees when using your own API keys
• Enterprise: Custom solutions with advanced security and 24/7 support

Perfect for developers and organizations looking to optimize their AI infrastructure while maintaining flexibility and control over costs.