LLM Gateway

The LLM gateway your development team has been waiting for

Every provider and every model — secured at runtime with access policies, cost control, data protection, and complete observability from a single control plane.
  • SOC 2 Type II
  • SaaS, Private Cloud, or On-Prem
  • Connect LLMs in Minutes

Trusted by enterprises like: 

What is an LLM Gateway?

One secure entry point between your teams, apps, and every LLM

 Instead of letting every developer, team, app, and agent connect directly to model providers, an LLM gateway sits in the middle — managing virtual keys, applying access and data policy, securing PII, and observing every call. Barndoor is the LLM gateway purpose-built for the agentic era.
Unified LLM Gateway

One endpoint for every LLM provider

Route across any provider OpenAI, Anthropic, Google, Bedrock, Azure, and any model you self-host — through a single governed endpoint. Switch providers without rewriting your apps.

  • Multi-provider routing — Failover and load-balance across providers automatically based on availability, cost, or policy.
  • Identity-aware access — Every call tied to a user, role, model, agent or app. No shared API keys, no shadow access.
  • Virtual keys per app, agent, user, or team — Issue, rotate, and revoke provider keys from the gateway without touching code — no shared keys, no shadow access.
Cost Control

Predictable AI spend, no surprise overages

Set budgets, enforce limits, and stop runaway spend at the LLM gateway — before it hits your invoice.

  • Per-team, per-user, per-app, and per-model budgets — Set independent spend caps that match how teams operate, across every LLM provider in your environment.
  • Rate limiting at the gateway — Throttle by request count and traffic volume to prevent runaway scripts, rogue agents, and unplanned token spikes.
  • Budget enforcement at the gateway — Block requests the moment a limit is hit — no overages, no after-the-fact surprises on your provider invoice.
Runtime Security

Control model access and stop prompt injection, data leaks and abuse before they happen

Most LLM proxies just forward traffic. Barndoor inspects every prompt and response, enforces model access and data loss prevention policies — at the gateway layer, before they ever reach the model.

  • Data loss prevention at the prompt — Protect PII, secrets, source code, and customer data before they reach any model provider.
  • Injection defense — Detects and blocks jailbreaks, prompt injection, and adversarial inputs in real time.
  • Policy-as-code — Author guardrails once in dev. Enforce them unchanged across every app, agent, model, and provider in production.
LLM Observability

See every prompt, token, and trace in one place

Logs, traces, costs, and quality metrics for every LLM call across your organization — built into the gateway, not bolted on. The observability platform your security and platform teams actually share.

  • End-to-end traces — Follow every LLM call from user to model to response, with full context across agent steps and tool calls.
  • Cost and token tracking — Real-time spend by app, team, user, or agent. Set budgets, alerts, and per-tenant quotas.
  • Audit-ready logging — Every call retained with full attribution — ready for SOC 2, HIPAA, EU AI Act, or internal review.
Built for Every Team

Give every team safe access to AI

No more bottlenecks, no more workarounds.

Security

✓

With Barndoor: Lead AI governance before it’s too late.

⊘

Without: Block AI to protect the perimeter.

IT

✓

With Barndoor: One control plane across every agent and platform.

⊘

Without: Manage access per tool, per platform.

Engineering

✓

With Barndoor: Ship agents faster — governance handled at the platform layer.

⊘

Without: Build custom access controls into every agent.

Compliance

✓

With Barndoor: Full audit trail of every agent action from day one.

⊘

Without: Retroactively reconstruct what agents did.

The LLM gateway built for enterprise scale

01

Speed to production

Connect every AI model through a single API endpoint.

02

Model routing

Set conditions for fallbacks when a provider fails or hits a rate limit.

03

Credential management

Create, manage, and monitor a virtual key for each app or agent.

04

Cost control

Cap token spend and request volume per user, team, or model.

05

Full visibility

Monitor request-level logs for routing decisions, usage, cost, and policies.

06

Prompt security

Protect sensitive data using detection and policies across input and output.
Deploy Anywhere

Built for enterprise environments

Deploy Barndoor where you need it—with the architecture and controls your organization requires.

SaaS

Fully managed deployment for fast setup and ongoing updates.

Private Cloud

Deploy in your cloud environment to meet security and compliance requirements. 

On-Prem

Run entirely within your infrastructure for maximum control and data residency. 

Get a Demo

Manage your LLM traffic in 30 minutes

Connect Barndoor to your environment in a working session. We’ll route live LLM calls through access and data policies, create budgets, show you the audit trail, and demo observability against your actual workloads.

  • Live walkthrough against LLM stack
  • Access policy and DLP examples for your data
  • Observability and cost dashboards on real traffic
  • 30 minutes. No slides.