Continuous optimization
Between your orchestrator and your models. Running locally in London.
One header
Add X-Region to any API call. No change to your orchestrator, your models, your agent logic.
1curl -X POST https://api.slng.ai/v1/llm \
2 -H "Authorization: Bearer $SLNG_API_KEY" \
3 -H "X-Region: eu-west-2" \
4 -d '{
5 "model": "gpt-4o",
6 "messages": [{"role": "user", "content": "..."}]
7 }'Compliance and security
Execution layer in London
Keep your pipeline. Add the execution layer
Continuous cost and latency reduction.
Keep your orchestrator
Livekit, Pipecat, custom. Your application code stays the same.
Keep your LLM
Keep your existing model and provider. SLNG routes, caches, and reduces cost on every call.
Keep your STT & TTS models
Bring your existing contract and provider. Or choose from SLNG 30+ model catalogue.
Getting started
Live instantly. Results within 24hrs
Send your existing call flow. We run it locally in the UK and show you the numbers against your current setup.
1. Add your keys
Bring your own keys for STT, LLM, and TTS. We never see your credentials.
2. Point to SLNG //
Direct your orchestrator to SLNG endpoints for STT, LLM, and TTS.
3. See the results
Give it 24 hours. Your dashboard shows savings, latency, and quality vs. baseline.
How much does SLNG cost in the UK?
US$ 0.0033 per agent minute for the execution layer. Add STT or TTS for US$ 0.0033 each. No contracts. No minimums.
What does the SLNG execution layer run in the UK?
LLM routing, smart caching, PII redaction, transcripts, and analytics on UK compute.
Does my voice AI data stay in-region?
Yes. Audio processed in a region stays in that region. Every call is logged with region, provider, model, and timestamp. You swap your base URL to the region of your choice.
What regions does SLNG support for voice AI?
11 sovereign hubs: San Francisco, Ashburn, and Council Bluffs in the US. Dublin, London, Stockholm, and Helsinki in Europe. Mumbai, Singapore, Jakarta, and Sydney in Asia Pacific.
How is SLNG priced?
US$ 0.001 per agent minute for the Execution layer. Same price as every other region. STT and TTS add-ons are each US$ 0.003 per agent minute with model costs included. No contracts, no minimums, no regional surcharges.
What is the SLNG Execution layer?
The infrastructure between your orchestrator and your models. It routes each call to the right model, caches repeated patterns, redacts PII, cancels noise, and logs everything: cost, latency, region, provider, per step. You keep your existing code. SLNG handles the layer underneath.
Does SLNG cost more in certain regions?
No. US$ 0.001 per agent minute for the Execution layer in every region. STT and TTS add-ons are each + US$ 0.003. No regional surcharges. No volume tiers.
How do I integrate SLNG with my voice AI stack?
Swap your STT, LLM, and TTS endpoints to SLNG. No changes to your orchestrator, your models, or your agent logic. Works with LiveKit, Pipecat, Cognigy, or any custom stack.
What does "per agent minute" mean?
Agent minute is the length of the call, not the amount of audio processed. A 3-minute call is 3 agent minutes regardless of how much silence or overlap it contains.
Is SLNG HIPAA compliant for voice AI?
Yes. SLNG is ISO 27001 certified, HIPAA compliant, and GDPR compliant. SOC 2 Type II is in progress. Compliance is enforced at the routing layer. Audio processed in a region stays in that region. Every call is logged with region, provider, model, and timestamp.
