14 Best Vercel AI Gateway Alternatives & Competitors
The top alternatives to Vercel AI Gateway in the LLM Gateways space, compared on features, pricing, and what they're best at.
Updated March 10, 2026
Why look beyond Vercel AI Gateway?
Vercel AI Gateway is a production-ready LLM gateway that provides unified access to hundreds of AI models with built-in reliability, monitoring, and cost management. Available to every Vercel team account, the gateway offers a free USD 5 monthly credit plus pay-as-you-go pricing with zero markup on model tokens. When bringing your own API keys, Vercel charges no platform fees, offering tokens at provider list price. Vercel Agent is priced at USD 0.30 per action plus underlying token costs. The platform focuses on developer experience, enabling frontend developers to add LLM capabilities with minimal setup without managing provider-specific SDKs or credentials. Key features include unified API across providers, budget controls, usage monitoring, load balancing, and automatic failover. While praised for ease of use, transparent pricing, and reliability with automatic failover, Vercel AI Gateway faces criticism for infrastructure limitations including 504 Gateway Timeout errors for long-running agents, execution time constraints (15 seconds default, 300 seconds maximum on Pro), insufficient semantic caching relying only on HTTP headers, and vendor lock-in with custom middleware not easily portable to other platforms.
- −504 Gateway Timeout errors for long-running agents beyond hard limits
- −Pro plan maximum 300 seconds insufficient for complex agent workflows
- −Semantic caching relies only on HTTP headers—misses equivalent prompts
Top Alternatives to Vercel AI Gateway
Respan is a unified AI gateway that provides a single API endpoint to access 250+ LLMs from every major provider. It offers intelligent model routing, fallback strategies, cost optimization, load balancing, and real-time observability—enabling teams to build resilient AI applications without vendor lock-in. Respan simplifies multi-model orchestration with built-in caching, rate limiting, and usage analytics across all providers.
OpenRouter is a unified LLM gateway providing OpenAI-compatible API access to 300+ models across 60+ providers (OpenAI, Anthropic, Google, Meta, Mistral, and more). Pay-as-you-go with passthrough rates plus a 5.5% platform fee on credit purchases; free tier with 25+ models capped at 50 requests/day.
Cloudflare AI Gateway is a proxy for AI API traffic that provides caching, rate limiting, analytics, and logging for LLM requests. Running on Cloudflare's global edge network, it reduces latency and costs by caching repeated requests. Free to use on all Cloudflare plans.
Portkey is an AI gateway that provides a unified API for 200+ LLMs with built-in reliability features including automatic retries, fallbacks, load balancing, and caching. The platform includes observability with detailed request logs, cost tracking, and performance analytics. Portkey also offers guardrails, access controls, and virtual keys for managing LLM usage across teams.
High-performance open-source LLM gateway written in Go. Handles ~10k RPS with <10ms latency.
LiteLLM is an open-source LLM proxy that translates OpenAI-format API calls to 100+ LLM providers. It provides a standardized interface for calling models from Anthropic, Google, Azure, AWS Bedrock, and dozens more. LiteLLM is popular as a self-hosted gateway with features like spend tracking, rate limiting, and team management.
Helicone is an open-source LLM observability and proxy platform. By adding a single line of code, developers get request logging, cost tracking, caching, rate limiting, and analytics for their LLM applications. Helicone supports all major LLM providers and can function as both a gateway proxy and a logging-only integration.
Powers the official SDKs for OpenAI, Anthropic, and others. The de facto gateway interface layer.
Unify provides intelligent LLM routing that automatically selects the optimal model and provider for each request based on quality, cost, and latency constraints. It benchmarks 100+ endpoints across providers and dynamically routes traffic to maximize performance while minimizing costs.
Kong AI Gateway extends the popular Kong API gateway with AI-specific capabilities including multi-LLM routing, prompt engineering, semantic caching, rate limiting, and cost management.
Martian is an intelligent model router that automatically selects the best LLM for each request based on the prompt content, required capabilities, and cost constraints. Using proprietary routing models, Martian optimizes for quality and cost simultaneously, helping teams reduce LLM spend while maintaining or improving output quality.
Unified LLM gateway and router with intelligent routing, automatic failover, cost optimization, and PII redaction. Access 400+ models through a single API.
Google Cloud's Apigee includes AI gateway capabilities for managing and securing generative AI API traffic, with model routing, token-based rate limiting, content moderation, and comprehensive analytics.
Compression middleware that sits between apps and LLMs, improving output quality while reducing token costs.
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