~50% Turn latency
p99 latency benchmarks
11 Sovereign hubs
30+ models, in-region execution
1¢/min STT + TTS
Predictable cost per agent minute
~50% LLM cost
Smart routing per turn
30+ models
Switch without changing code
<2ms overhead
Noise cancellation · Language detection
SLNG in partnership with leading voice labs
One integration. 30+ models
One API. Every model. Every region
SLNG handles STT, TTS, and LLM routing through a single API. You send audio in, get audio out. Model selection, regional routing, noise cancellation, and failover happen at the infrastructure layer. Your application code stays the same.
Turn Context · carried per turn
Noise cancelled at routing layer · spoken language auto-detected
Global System State · checked every turn
Provider latency · regional availability · best model per language
Four things between your agent and production
SLNG handles them all, so your engineers stop running infrastructure and start shipping product.
Voice Infra
Dedicated compute · In-region colocation · Routing & deployment · Noise cancellation · Low latency by design
Voice Capacity
Committed concurrency · Burst headroom · Automatic language detection · Shared or dedicated regions · New languages on demand
Voice Compliance
In-region processing · Single DPA · Data residency controls · Certification coverage
Voice Ops
Vendor management · Contracts & DPAs · Model selection · Latest models, instantly
Plug in three endpoints. Nothing else changes
Your orchestrator, your LLM, your agent logic, none of it changes. Everything runs faster from your first call.
1# Text-to-speech, any model, any region.
2curl -X POST https://api.slng.ai/v1/tts/slng/rime/arcana:3-en \
3 -H "Authorization: Bearer YOUR_KEY" \
4 -H "Content-Type: application/json" \
5 -d '{ "text": "Hello from production", "speaker": "astra" }'Running in a regulated market? One header. Audio stays in-region.
1# Pin processing to a specific region for compliance.
2curl -X POST https://api.slng.ai/v1/tts/slng/rime/arcana:3-en \
3 -H "Authorization: Bearer YOUR_KEY" \
4 -H "X-Region: eu-west-1" \
5 -d '{ "text": "Hello from production", "speaker": "astra" }'In-region compute
11 sovereign hubs. Physical GPU hardware
Audio is processed in-region and stays there. Single DPA covers all 30+ providers on the platform.
Compliance
GDPR
HIPAA
SOC2 Type2 (in audit)
ISO27001 (in audit)
Getting started
1c/min for real-time voice execution
Send your existing call flow. We run it in-region and show you the numbers against your current setup.
1. Send your call flow
API or existing pipeline. No changes required.
2. Run in-region
We baseline your latency and cost, run it through SLNG.
3. See the numbers
p99 latency and cost per minute against your current setup.
Join our Developer’s community
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