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Voice AI Gateway for unified model control

Route, manage, and monitor every STT, TTS, and LLM request from a single API. The Gateway controls performance, cost, region, and compliance so your voice stack behaves predictably across providers and markets.

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The challenge

Voice AI has no
unified control.

Teams stitch together STT, TTS, and LLM providers, each with its own routing rules, latency behaviors, cost profiles, and regional limitations. There is no consistent way to decide how requests run or where inference takes place. Without unified control, performance shifts across providers, costs become unpredictable, and compliance is difficult to guarantee. Voice workloads remain fragmented, making global deployment hard to scale and even harder to trust.

Voice AI has no
unified control.

Capabilities

Full control of your voice stack

The Gateway manages routing, performance, compliance, and provider selection from one API. It standardizes how STT, TTS, and LLM requests run across regions, workloads, and providers.

Single API for all models

Single API for all models

Call STT, TTS, and LLM models through one format and let SLNG route requests based on language, cost, quality, or region.

Smart routing and region control

Smart routing and region control

Run requests in the closest or approved geography with automatic routing for latency, residency, and compliance rules.

Performance profiles

Performance profiles

Choose cost-optimized, performance-optimized, or availability-optimized modes and let the system apply them at inference time.

Analytics and observability

Analytics and observability

Access usage metrics, logs, model decisions, and region traces so your voice workloads behave predictably across providers.

Access control and security

Access control and security

Restrict who can call your APIs, enforce allowlists or blocklists, and secure traffic paths through the Gateway.

Model management at scale

Model management at scale

Manage multiple models, versions, and backends without changing your integration thanks to normalized API semantics.

Single API for all models

Single API for all models

Call STT, TTS, and LLM models through one format and let SLNG route requests based on language, cost, quality, or region.

Smart routing and region control

Smart routing and region control

Run requests in the closest or approved geography with automatic routing for latency, residency, and compliance rules.

Performance profiles

Performance profiles

Choose cost-optimized, performance-optimized, or availability-optimized modes and let the system apply them at inference time.

Analytics and observability

Analytics and observability

Access usage metrics, logs, model decisions, and region traces so your voice workloads behave predictably across providers.

Access control and security

Access control and security

Restrict who can call your APIs, enforce allowlists or blocklists, and secure traffic paths through the Gateway.

Model management at scale

Model management at scale

Manage multiple models, versions, and backends without changing your integration thanks to normalized API semantics.

Single API for all models

Single API for all models

Call STT, TTS, and LLM models through one format and let SLNG route requests based on language, cost, quality, or region.

Smart routing and region control

Smart routing and region control

Run requests in the closest or approved geography with automatic routing for latency, residency, and compliance rules.

Performance profiles

Performance profiles

Choose cost-optimized, performance-optimized, or availability-optimized modes and let the system apply them at inference time.

Analytics and observability

Analytics and observability

Access usage metrics, logs, model decisions, and region traces so your voice workloads behave predictably across providers.

Access control and security

Access control and security

Restrict who can call your APIs, enforce allowlists or blocklists, and secure traffic paths through the Gateway.

Model management at scale

Model management at scale

Manage multiple models, versions, and backends without changing your integration thanks to normalized API semantics.

Route. Govern. Observe.

How it works

Route. Govern. Observe.

The Gateway standardizes how STT, TTS, and LLM requests run across providers. It applies routing rules, performance settings, and compliance constraints before executing any workload, so every request behaves predictably across regions.

Route

Define language, region, cost, or performance preferences. The Gateway chooses the closest or approved provider and sets where the request will run.

Govern

Apply performance profiles, residency requirements, quality thresholds, and provider constraints. The Gateway enforces these rules consistently for every request.

Observe

Access metrics, logs, and traces to understand where models ran, how they performed, and why specific providers were selected.

Trusted by product teams building voice AI worldwide.

Compliance by design

Compliant workloads in 
any region
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Region-locked execution

Requests run only in the geographies you approve, including EU-only, US-only, Germany, or other sovereign zones with strict residency.

Compliance-aware routing

The Gateway applies your organization’s rules for region, industry, and provider selection before executing any STT, TTS, or LLM workload.

Access control and secure traffic

Enforce allowlists or blocklists and secure all API and WebSocket traffic through isolated routing paths.

Auditable operations

Every request generates logs, traces, and provider decisions so teams can verify how and where inference was executed.

Voice AI Gateway for orchestrating every model, everywhere.

Faqs

FAQs – Straight talk on SLNG

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