Best AI Gateways with Semantic Caching
LLM gateways that cache semantically similar prompts to cut token spend and latency on repeated queries.
Our pick: Portkey
Portkey is a production infrastructure layer for generative AI teams, providing a unified REST API across 1,600+ models with built-in routing, automatic fallback, load balancing, semantic caching, and observability logging. It targets developers and enterprises building LLM-powered applications who need cost controls, prompt versioning, and AI guardrails including PII redaction. Paid plans start at $49 per month with a free tier capped at 10,000 logged requests; an open-source self-host option is available under the MIT license. Portkey holds SOC 2 Type II, HIPAA, GDPR, and ISO 27001 certifications, though compliance certificates and private VPC deployments are restricted to the Enterprise tier.
Best for: Prototypes and side projects - free to start, no sales call; Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt).
Best for…
Ranked (7)
#1 Portkey
74 / 100- Best overall
- Best free pick
- Best for enterprise
- Cheapest to start
- Best for agents
- Broadest surface
Portkey is a production infrastructure layer for generative AI teams, providing a unified REST API across 1,600+ models with built-in routing, automatic fallback, load balancing, semantic caching, and observability logging. It targets developers and enterprises building LLM-powered applications who need cost controls, prompt versioning, and AI guardrails including PII redaction. Paid plans start at $49 per month with a free tier capped at 10,000 logged requests; an open-source self-host option is available under the MIT license. Portkey holds SOC 2 Type II, HIPAA, GDPR, and ISO 27001 certifications, though compliance certificates and private VPC deployments are restricted to the Enterprise tier.
PricingHybrid · from $49 month · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001DoesUsed bySnorkel AI, RVO Health, Haptik, SiteGPT#2 Bifrost (Maxim AI)
67 / 100Bifrost by Maxim AI is an LLM, MCP, and agent gateway that provides unified routing, automatic failover, load balancing, semantic caching, and spend controls across multiple AI providers through an OpenAI-compatible REST API. It targets enterprise teams that need governance, observability, and cost management over LLM usage. The core product is open-source under Apache 2.0 for self-hosting, while enterprise features including guardrails, RBAC, SSO, audit logs, and in-VPC deployment require a custom-priced plan. SOC 2 Type II, ISO 27001, HIPAA, and GDPR compliance are available at the enterprise tier.
PricingSales-led · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001Does#3 TrueFoundry AI Gateway
80 / 100TrueFoundry AI Gateway is a unified LLM proxy that routes requests across 1,600+ models from 15+ providers, with built-in failover, semantic caching, spend controls, PII redaction, and observability. It is aimed at enterprises needing centralized AI governance, including regulated industries that require on-premises or air-gapped deployments. Paid plans start at $499 per month (Pro, 1M requests, 10 users), with a free Developer tier capped at 50,000 requests and 3 users. The platform holds SOC 2 Type II, HIPAA, and GDPR certifications, though HIPAA and GDPR-ready deployments require the Pro Plus plan or above.
PricingHybrid · from $499 month · free tier ✓TrustSOC 2 Type II · HIPAA · GDPRDoesUsed byInnovaccer, Whatfix, Wadhwani AI, Aviva Credito#4 Helicone
72 / 100Helicone is an open-source LLM observability and gateway platform that routes requests across 100+ models through a single OpenAI-compatible API, with built-in monitoring, semantic caching, automatic failover, and spend controls. It targets developers and teams building AI applications who need multi-provider flexibility without markup on model costs. Paid plans start at $79 per month, with a free tier capped at 10,000 requests per month and an Apache 2.0 self-hosted option. Helicone holds SOC 2 Type II certification and is HIPAA and GDPR compliant, with SDKs for Python and Node.js and an MCP server available.
PricingHybrid · from $79 month · free tier ✓TrustSOC 2 Type II · HIPAA · GDPRDoes#5 Kong AI Gateway
74 / 100Kong AI Gateway is a control plane for teams routing traffic across multiple LLM providers, offering unified OpenAI-compatible API access, automatic fallback, semantic caching, token-based spend limits, PII sanitization, and MCP/agent-to-agent governance. It targets platform and security engineering teams that need centralized AI access control, observability, and audit logging across providers. Paid plans start at $105 per seat per month with no sales call required, and a fully self-hosted open-source option (Kong Gateway 3.9.1 and earlier) is available at no cost. The platform holds SOC 2 Type 2 certification, is GDPR and PCI DSS compliant, and publishes an SLA.
PricingHybrid · from $105 seat/month · free tier ✓TrustSOC 2 Type II · GDPR · PCI DSSDoesUsed byRabobank, Richemont, Sky Italia, Verifone#6 Requesty
62 / 100Requesty is a unified AI gateway and LLM router that provides a single OpenAI-compatible endpoint for accessing over 400 AI models, with automatic failover, load balancing, and prompt caching built in. It is aimed at teams and enterprises that want cost control and observability across multiple LLM providers, offering real-time cost and latency dashboards, RBAC, spend limits, and model whitelists. Pricing is usage-based at a 5% markup on base model costs for pay-as-you-go accounts, with a free tier capped at 200 requests per day. Customers include Shopify, Siemens, Pfizer, and PwC, and the service runs across EU, US, and APAC regions with GDPR compliance and a published SLA.
PricingUsage · free tier ✓TrustSOC 2 In progress · GDPRDoesUsed byShopify, Amadeus, Chargebee, Contentful#7 LiteLLM
48 / 100LiteLLM is an open-source LLM gateway that provides a unified OpenAI-compatible API across 100+ model providers, handling load balancing, automatic failover, semantic caching, rate limiting, and spend tracking in one proxy layer. It is self-hosted rather than offered as a managed SaaS, making it suited for teams that need centralized governance over multiple LLM deployments without vendor lock-in. The free tier covers self-hosting with SSO available up to five users; enterprise licensing is required for features such as audit logs, SCIM, per-key guardrails, and batch cost tracking. LiteLLM holds SOC 2 Type I and ISO 27001 certifications, with SDKs for Python and Node.js and support for API key, JWT, and OAuth2 authentication.
PricingSales-led · free tier ✓TrustSOC 2 Type I · ISO 27001DoesUsed byNetflix, Lemonade