SLNG // in partnership with leading voice labs
Not every sentence needs a GPU
You're paying for inference you don't need
Right now your stack is hitting the GPU on every turn. STT, LLM, TTS - full inference, every sentence, regardless of context. That's where your cost and latency are.
Global Execution layer
US$ 0.0033 / agent minute
Better execution thay brings better outcomes.
Keep your orchestrator
Livekit, Pipecat, custom. Your application code stays the same.
Keep your LLM
Keep your existing model and provider. SLNG routes, optimizes, and reduces cost on every call.
Keep your STT & TTS models
Bring your existing contract and provider. Or choose from SLNG // 30+ model catalogue.
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"Continuous optimization
Every call improves the next one
Every call teaches the system. Model selection gets sharper, latency drops, and your cost per minute falls automatically, without touching a line of code.
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
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 store 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.
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.
How is SLNG priced?
US$ 0.0033 per agent minute for the execution layer. Same price as every other region. STT and TTS add-ons are each US$ 0.0033 per agent minute with model costs included. No contracts, no minimums, no regional surcharges.
Can I bring my own model API keys?
Yes. BYOK is the default. Bring your existing OpenAI, Anthropic, Deepgram, or ElevenLabs keys. The SLNG execution layer routes through them, adding routing, caching, and observability without changing your provider contracts.
Is SLNG suitable for regulated environments?
Yes. SLNG enforces region and country rules at runtime. Enterprise plans add residency, retention, auditability, and SLA-backed guarantees for regulated workloads.
Stay in the loop
Unmuted.
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