Continuous optimization
Between your orchestrator and your models. Running locally in Finland.
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/llm \
2 -H "Authorization: Bearer $SLNG_API_KEY" \
3 -H "X-Region: eu-north-1" \
4 -d '{
5 "model": "gpt-4o",
6 "messages": [{"role": "user", "content": "..."}]
7 }'Models available in Finland
US$ 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).
Reson8 Resonant 1
Adapts to domain-specific vocabulary in real time using text-only context, no fine-tuning or audio data required. Purpose-built for European languages with models optimized for streaming and voice agents.
Inworld TTS
Self-hosted on Finnish compute. Ultra-realistic, context-aware speech synthesis, zero data retention, and precise voice cloning capabilities.
Rime Arcana 3
Provides industry leading latency, enabling natural back-and-forth interactions without awkward pauses.
Cartesia Sonic 3
Takes text input and and streams back ultra-realistic speech in response. Can also clone voices, with full control over pronunciation and accent.
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 Finland
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 Finland 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.
What are SLNG's Nordic GPU hubs?
SLNG runs sovereign GPU hubs in Sweden (Stockholm) and Finland (Mäntsälä). Self-hosted STT and TTS models run locally on Nordic GPUs. The full EU model catalog is also available via proxy routing.
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.
Does my data leave the EU?
No. Routing enforces data residency at the infrastructure level. Audio stays in the EU.
Is SLNG compliant with GDPR?
GDPR compliant. ISO 27001 certified. HIPAA compliant. 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.
Stay in the loop
Define. Execute. Govern. Verify.
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