SLNG // in partnership with leading voice labs
What's included
US$ 0.0033 / agent minute
Execution layer. Continuous cost + 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. Also provided by SLNG // for US$ 0.0033 / agent minute.
Stack what you need
Optional add-on to the Execution Layer
STT — US$ 0.0033 / agent minute
Best model per turn · Multi-language · Multi-provider · In-region
TTS — US$ 0.0033 / agent minute
Sub-100ms TTFB · PII-safe delivery · Multi-provider · In-region
Model labs
Gradium · Deepgram · Speechmatics · AssemblyAI · Soniox · Whisper · Gladia · pyannoteAI · Voxtral · Savram AI + more
Model labs
Gradium · Rime · Deepgram · Cartesia · InWorld · Savram AI · Soniox · KugelAudio · MURF.AI + more
Compounds in real-time
Continuous optimization. Better call outcomes
Every call teaches the system. Model selection gets sharper, latency drops, and your cost per minute falls automatically, without touching a line of code.
Plug in three endpoints. Nothing else changes
STT
1curl -X POST https://api.slng.ai/v1/stt \
2 -H "Authorization: Bearer YOUR_KEY" \
3 -H "Content-Type: application/json"curl -X POST https://api.slng.ai/v1/llm \
4 -H "Authorization: Bearer YOUR_KEY" \
5 -H "Content-Type: application/json"LLM
1curl -X POST https://api.slng.ai/v1/llm \
2 -H "Authorization: Bearer YOUR_KEY" \
3 -H "Content-Type: application/json"TTS
1curl -X POST https://api.slng.ai/v1/tts \
2 -H "Authorization: Bearer YOUR_KEY" \
3 -H "X-Slng-Provider-Key: YOUR_PROVIDER_KEY" \
4 -H "Content-Type: application/json"In-region compute
Select your region per request
11 sovereign hubs. No redeployment, no config changes.
-H "X-Region: eu-west-1"
One header controls where your audio and model calls are processed.
Getting started
Live instantly. Results within 24hrs
Send your existing call flow. We run it in-region 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.
Stay in the loop
Unmuted.
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