Continuous optimization
Between your orchestrator and your models. Running locally in South Africa.
PII redaction
Stripped before audio reaches your models or logs.
TTS Smart caching
Repeated TTS responses served from cache. Provider never gets called.
LLM routing
Simple turns stay local. Complex turns hit your LLM. Fewer model calls per conversation.
Transcripts
Region, provider, model, cost, latency. Logged per step, per call.
Analytics
Cost and latency tracked against baseline. Dashboard shows the delta.
Output assembly
PII redaction, transcripts, and analytics. All processing local. Your provider is only called when the cache can't answer.
1curl -X POST "https://api.slng.ai/v1/tts/deepgram/aura:2" \
2 -H "Authorization: Bearer $SLNG_API_KEY" \
3 -H "X-Slng-Provider-Key: $YOUR_DEEPGRAM_KEY" \
4 -H "Content-Type: application/json" \
5 -d '{
6 "text": "Your appointment is confirmed for tomorrow at 2pm.",
7 "model": "aura-2-thalia-en"
8 }'Models available in South Africa
US$ 0.0033 / agent minute
Deepgram Nova 3
Optimized for live applications, delivering low-latency transcription that enables responsive voice agents, captions, and interactive systems.
Soniox STT AI
A universal speech AI that lets you transcribe and translate speech in 60+ languages — from recorded files (async) or live audio streams (real-time).
Deepgram Nova 3 Medical
Designed for clinical environments. Filters out irrelevant noise and capturing critical details such as medication names, diagnostic terms, and procedure details.
Cartesia Sonic
Takes text input and streams back ultra-realistic speech in response. Can also clone voices, with full control over pronunciation and accent.
Murf AI Falcon
Optimized for real-time use cases where responsiveness is critical. Ensures conversations feel seamless, natural, and instant.
Soniox TTS RT
Engineered to handle the edge cases that break most production speech systems. Delivers high-fidelity speech across 60+ languages with hallucination-free guarantee.
Deepgram Aura 2
Real-time text-to-speech model built for conversational AI. It generates natural, human-like speech with low latency. Low latency, multiple voice options. Streaming.
Compliance and security
Execution layer in South Africa
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 South Africa 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.
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.
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.
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.
Is SLNG HIPAA compliant?
Yes. SLNG is HIPAA compliant with BAA available. ISO 27001 certified. SOC 2 Type II in audit. Details at trust.slng.ai.
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.
What voice AI models does SLNG support?
30+ models across STT, LLM, and TTS, including Deepgram, Whisper, OpenAI, Anthropic, Rime, Cartesia, and ElevenLabs. Sovereign-hosted models run on SLNG's own in-region compute. BYOK is the default - bring your existing provider keys and contracts.
How does SLNG reduce voice AI latency?
The execution layer routes each call to the optimal model based on cost and latency, adding under 2ms of overhead. And sovereign hubs run the full stack on physical hardware in 11 regions so your models and your callers are in the same region. Observed result: ~39% less turn latency in production.
Stay in the loop
Define. Execute. Govern. Verify.
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