Best AI Tools for LLM Gateway in 2026
Route API requests, manage API keys, track costs, and switch between different language models through a single unified interface.
Top LLM Gateway AI tool recommendations
These LLM Gateway AI tools are ranked by LLM Gateway fit score first, with free access and latest usage signals as secondary checks.
The tool explicitly states it is a unified, multi-model LLM API gateway for developers.
The tool is explicitly described as a unified open-source API gateway to route and manage LLM requests.
Respan unifies developer workflows by acting as a single unified AI gateway for over 500 models.
Best Free LLM Gateway AI Tools
Start with free LLM Gateway AI tools that cover practical LLM Gateway workflows before comparing paid pricing plans.
| Tool | Fit | Free status | Pricing | Why it fits | Website |
|---|---|---|---|---|---|
| OfoxAI | 100 | Free option | Free, Pro plan is Pay-as-you-go | The tool explicitly states it is a unified, multi-model LLM API gateway for developers. | Visit |
| LLM Gateway | 100 | Free option | Free, Pro from $50/mo | The tool is explicitly described as a unified open-source API gateway to route and manage LLM requests. | Visit |
| Respan | 100 | Free option | Free, Team from $199/mo | Respan unifies developer workflows by acting as a single unified AI gateway for over 500 models. | Visit |
| Higress | 100 | Free option | Free open-source version, contact for enterprise version pricing | The tool is explicitly defined as an AI-native API gateway designed to manage LLM API traffic. | Visit |
| APIPark | 100 | Free option | Free for Community, Enterprise requires contacting sales | APIPark explicitly defines itself as an open-source AI and LLM gateway for enterprise operations. | Visit |
| liteLLM | 98 | Free option | Open Source is Free, contact for Enterprise pricing | Serves as an open-source gateway and proxy to manage authentication and load balancing across LLMs. | Visit |
| Agnes AI | 98 | Free option | Free, Starter from $2/mo | Agnes AI serves directly as an advanced unified AI gateway providing consolidated access to multiple multimodal models. | Visit |
| Manifest | 95 | Free option | Free, Open Source | Manifest serves as an open-source LLM router that intercepts and dynamically routes user queries to appropriate models. | Visit |
| Not Diamond | 92 | Free option | Free, Plus from $20/mo | It acts as a gateway that intelligently routes user queries to the most suitable LLM. | Visit |
Compare pricing for LLM Gateway AI tools
Compare plan names, prices, and short pricing notes for the top LLM Gateway AI tools before opening each official website.
| Tool | Fit | Pricing plans | Website |
|---|---|---|---|
OfoxAIFree option | 100 | FreeFree For indie devs / learning. Includes 10+ free models, unlock all models, 3 RAG knowledge bases (coming soon), basic MCP tools (coming soon), unlimited members, community support, and no SLA. ProPay as you go Full access, pay per use, no limits. Includes all models unlocked, full RAG capabilities with no limits (coming soon), all MCP tools (coming soon), unlimited users, ticket + online support, and a 99.9% SLA. EnterpriseContact for Pricing Volume savings and dedicated support. Includes custom tiered pricing, private/hybrid cloud, custom RAG solutions, custom MCP development, unlimited users + SSO, dedicated success manager, 24/7 support hotline, and a 99.99% SLA. | Visit |
LLM GatewayFree option | 100 | Self-HostFree 100% free forever, full control over data, host on your infrastructure, no usage limits, community support. Free (Cloud)$0/month Access to ALL models, pay with credits, 5% LLMGateway fee on credit usage, 3-day data retention, standard support. Pro$50/month Use your own API keys without surcharges, NO fees on credit usage, 90-day data retention, Advanced Analytics, priority support. (50% off until July 15 with code PRODUCTHUNT) EnterpriseCustom Everything in Pro, advanced security features, custom integrations, onboarding assistance, unlimited data retention, 24/7 premium support. | Visit |
RespanFree option | 100 | Pro$0 For getting started. Includes full platform access, 100k logs, 1k scores, 5 datasets, 2 evaluators, 5 prompts, and a 7-day data retention period. Team$199 per month For startups and growing teams. Everything in Pro plus unlimited datasets, evaluators, and prompts, 10k scores, 30-day retention, private Slack channel, and SOC 2 report. Billed yearly. EnterpriseContact us For large organizations. Everything in Team plus custom packages, volume discounts, custom SLAs, dedicated support engineer, HIPAA BAA, and self-hosted deployment options. | Visit |
APIParkFree option | 100 | Community EditionFree Suitable for SMEs with internal open APIs, including basic gateway functionality, routing rewrite, basic authentication, and operations management. Enterprise EditionContact for Pricing Suitable for large and medium-sized enterprises featuring API data processing, advanced plugin extensions, OpenAPI, advanced security features, and dedicated support. | Visit |
liteLLMFree option | 98 | Open Source$0 Includes 100+ LLM provider integrations, Langfuse/Langsmith/OTEL logging, virtual keys, budgets, teams, load balancing, RPM/TPM limits, and LLM guardrails. EnterpriseContact for Pricing For giving LLM access to a large number of developers and projects. Includes everything in OSS, plus Enterprise Support, custom SLAs, JWT Auth, SSO, and Audit Logs. | Visit |
Agnes AIFree option | 98 | Starter$2 per month Billed monthly (discounted from $4). Includes 1,500 model requests per 5 hours, higher RPM limit, powered by Agnes-2.0-Flash (100-150 TPS), compatible with mainstream coding tools, image understanding, image models, and video models. Plus$5 per month Billed monthly (discounted from $10). Includes 7,500 model requests per 5 hours, higher RPM limit, powered by Agnes-2.0-Flash (100-150 TPS), compatible with mainstream coding tools, image understanding, image models, and video models. Pro$25 per month Billed monthly (discounted from $50). Includes 30,000 model requests per 5 hours, higher RPM limit, powered by Agnes-2.0-Flash (100-150 TPS), compatible with mainstream coding tools, image understanding, image models, and video models. | Visit |
Not DiamondFree option | 92 | DiscoveryFree Up to 100K monthly API routing requests, train 1 custom router, fallback rerouting, and cost/latency tradeoffs. Possibility$100/mo Plus $0.001 per API routing request after the first 100K free requests. Includes uncapped API routing requests, unlimited custom routers, and fuzzy hashing privacy. NecessityCustom pricing Tailored individual pricing for VPC deployments, custom integration, router training support, and advanced permissions management. Chat App (Pro)$20/mo Upgrade option for the standalone web chat application, which can also be used with basic access for free. | Visit |
ZenMuxPaid-first | 100 | Gemini 3.0 Flash PreviewFree Preview model access with zero base fees MiMo V2 FlashFree Flash tier model access with zero base fees Paid Models (e.g., GPT 5.2, Gemini 3 Pro, Qwen3-Max)Pay-as-you-go Precisely metered by billing items including prompt tokens, completion tokens, internal reasoning, image processing, or web search depending on the specific provider tier. | Visit |
Latest LLM Gateway AI tool overview
Rank the best online AI tools for LLM Gateway by free access, pricing, LLM Gateway task fit score, and the practical reason each tool belongs on this page.
| Tool | Free | Starting price | Task fit score | Why it fits | Visit |
|---|---|---|---|---|---|
| ZeZenMux | No | Free models available, premium models feature pay-as-you-go tiered pricing | 100 | The platform explicitly defines itself as a unified AI gateway for multiple LLMs. | Visit |
| EvEvolink AI Model API | No | Pay-as-you-go based on usage, plus a 5-10% routing fee | 100 | EvoLink explicitly acts as a unified API gateway that aggregates and routes multiple AI models. | Visit |
| CoCometAPI | No | Pay-as-you-go, with models starting from $1.2/1M tokens | 100 | CometAPI serves as a unified gateway allowing developers to access over 500 AI large language models. | Visit |
| OfOfoxAI | Yes | Free, Pro plan is Pay-as-you-go | 100 | The tool explicitly states it is a unified, multi-model LLM API gateway for developers. | Visit |
| LLLLM Gateway | Yes | Free, Pro from $50/mo | 100 | The tool is explicitly described as a unified open-source API gateway to route and manage LLM requests. | Visit |
| ReRespan | Yes | Free, Team from $199/mo | 100 | Respan unifies developer workflows by acting as a single unified AI gateway for over 500 models. | Visit |
| CrCrazyrouter | No | Pay-as-you-go, models from $0.0550/M tokens | 100 | The website explicitly describes the tool as a one-stop AI API aggregation platform and unified gateway. | Visit |
| HiHigress | Yes | Free open-source version, contact for enterprise version pricing | 100 | The tool is explicitly defined as an AI-native API gateway designed to manage LLM API traffic. | Visit |
| APAPIPark | Yes | Free for Community, Enterprise requires contacting sales | 100 | APIPark explicitly defines itself as an open-source AI and LLM gateway for enterprise operations. | Visit |
| liliteLLM | Yes | Open Source is Free, contact for Enterprise pricing | 98 | Serves as an open-source gateway and proxy to manage authentication and load balancing across LLMs. | Visit |
| AgAgnes AI | Yes | Free, Starter from $2/mo | 98 | Agnes AI serves directly as an advanced unified AI gateway providing consolidated access to multiple multimodal models. | Visit |
| poportkey.ai | No | Free trial available, custom plans for startups and enterprises | 98 | Portkey acts as a unified LLM gateway to reliably route requests to over 250 language models. | Visit |
AI tool categories that work for LLM Gateway
See which AI tool categories appear most often in the strongest LLM Gateway matches.
| Category | Matching tools | Free plans | Average fit | Top tool |
|---|---|---|---|---|
| AI API | 21 | 8 | 97 | |
| AI Developer Tools | 17 | 9 | 98 | |
| Large Language Models (LLMs) | 15 | 9 | 97 | |
| Open Source AI Models | 7 | 6 | 95 | |
| AI Agent | 6 | 5 | 99 | |
| AI Models | 6 | 2 | 96 |
Popular tools with strong fit for LLM Gateway
Compare usage signals with fit score so popular LLM Gateway tools do not outrank better workflow matches by traffic alone.
| Tool | Traffic signal | Fit | Price | Why it belongs |
|---|---|---|---|---|
| liteLLM | 703K/mo | 98 | Open Source is Free, contact for Enterprise pricing | Serves as an open-source gateway and proxy to manage authentication and load balancing across LLMs. |
| ZenMux | 435K/mo | 100 | Free models available, premium models feature pay-as-you-go tiered pricing | The platform explicitly defines itself as a unified AI gateway for multiple LLMs. |
| Evolink AI Model API | 363K/mo | 100 | Pay-as-you-go based on usage, plus a 5-10% routing fee | EvoLink explicitly acts as a unified API gateway that aggregates and routes multiple AI models. |
| CometAPI | 363K/mo | 100 | Pay-as-you-go, with models starting from $1.2/1M tokens | CometAPI serves as a unified gateway allowing developers to access over 500 AI large language models. |
| Agnes AI | 299K/mo | 98 | Free, Starter from $2/mo | Agnes AI serves directly as an advanced unified AI gateway providing consolidated access to multiple multimodal models. |
| OfoxAI | 274K/mo | 100 | Free, Pro plan is Pay-as-you-go | The tool explicitly states it is a unified, multi-model LLM API gateway for developers. |
| LLM Gateway | 76K/mo | 100 | Free, Pro from $50/mo | The tool is explicitly described as a unified open-source API gateway to route and manage LLM requests. |
| Not Diamond | 65K/mo | 92 | Free, Plus from $20/mo | It acts as a gateway that intelligently routes user queries to the most suitable LLM. |
LLM Gateway FAQ
Compare the latest ranked AI tools for LLM Gateway
Review top free and paid online AI-powered tools for LLM Gateway, pricing signals, and fit scores before choosing a LLM Gateway workflow.