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Voice Agent Pricing

Consumption-based Voice Agent pricing, use case by use case.

$0.0033 per component, per agent minute. Prepaid credit that burns down as you use it.

Default

Pay as you go

US$ 0.0033

per component / agent minute

Prepaid credit — burns down with usage
Credit rolls forward, never expires
Auto-recharge when your balance runs low
Community support (Discord + GitHub)
Best-effort concurrency, sensible defaults

Optional add-on

Basic Support

US$ 199 / month

24h business-hours email · private ticket queue · priority engineering access.

For those running > 1M call minutes / month

Enterprise

from US$ 5,000

/ month prepaid minimum

Prepaid credit at the same US$ 0.0033 rate
Overage trued up end of month via card on file
Guaranteed concurrency, dedicated capacity
Forward Deployed Engineer + dedicated Slack
P0 / P1 / P2 SLAs · uptime SLA
Custom regions & deployment topology

You're in control

You're in control. Use case by use case.

Run what you want on SLNG. Bring your own keys (BYOK) for everything else. Pay only for what SLNG runs.

Execution Layer only

Optimise your existing agent

Keep your orchestrator, STT, LLM, and TTS. SLNG adds the execution layer — cache, routing, governance, marking.

US$ 0.0033 / agent minute

Complete Agent

Run your complete agent on SLNG

SLNG runs the full stack — orchestrator, execution layer, STT, LLM, TTS. Nothing to integrate, nothing to manage.

US$ 0.0165 / agent minute

Execution Layer + STT

Add transcription to your agent

Keep your orchestrator, LLM, and TTS. SLNG runs execution layer + STT with automatic failover.

US$ 0.0066 / agent minute

Execution Layer + STT + TTS

Voice in, voice out

Keep your orchestrator and LLM. SLNG runs execution layer + STT + TTS for complete voice handling.

US$ 0.0099 / agent minute

Full Stack (BYO Orchestrator)

Use your orchestrator, we handle the rest

Keep your orchestrator. SLNG runs execution layer, STT, LLM, and TTS — the complete agent stack below orchestration.

US$ 0.0132 / agent minute

Every component

Pay only for what you use.

Each use case activates only the components it needs. US$ 0.0033 per component, per agent minute.

SLNG // Execution layer.

Routes, caches, governs, auto-optimises, marks and reports. Always active in region.

US$ 0.0033 / agent min

·15 sovereign regions
·Data residency controls
·Regional PII aware LLM cache, per use case
·Regional PII aware TTS cache, per use case
·Automatic Call Context Optimization
·Automatic Latency Optimisation
·PII redaction inline
·Prerender TTS + reuse
·Per-call boundary decision log
·Full call transcripts
·Agent Sandbox (10 seconds Active CPU incl.)
·SOC 2 · ISO 27001 · HIPAA · GDPR

STT

Any model. Swap freely.

US$ 0.0033 / agent min

·Deepgram, AssemblyAI, Speechmatics, Gladia, Soniox, Whisper, more
·Select Provider Per Language
·Regional routing per policy
·Unified transcript format
·Noise Cancelation

LLM

Any model. Route by policy. Cache regionally.

US$ 0.0033 / agent min

·GPT-4o, Claude, Gemini, Llama, more
·Regional semantic cache (PII Aware)
·Policy-based routing
·Unified response format

TTS

Any model from our Catalogue. Gets faster with every call.

US$ 0.0033 / agent min

·Fish.Audio, Cartesia, Savram, Deepgram, Rime, Soniox plus more
·Mid-call voice swap
·Regional routing per policy

Worker + SIP

Framework runtime and carrier connectivity in-region.

US$ 0.0033 / agent min

·LiveKit or Pipecat framework runtime
·SIP carrier connectivity, 15 regions
·Transfer, hold, DTMF
·PSTN + DID management
·Worker control channel (autoscaling)

optionalRecording · US$ 0.0033 / min when active · declared per use case

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.

What’s included in every SLNG plan?

Every plan includes access to the same Voice AI Cloud, with all supported models, regions, runtimes, and APIs. SLNG does not gate core capability by plan.

What’s the difference between Hobby, Pro, and Enterprise?

The difference is not capability. Plans vary by scale, execution guarantees, behaviour control, data ownership, integrations, and support.

How does usage-based billing work?

Usage is billed independently of your plan. You pay for actual voice usage, while plans and add-ons define concurrency, guarantees, and operational certainty.

How does concurrency pricing work?

Concurrency defines how many calls can run at the same time. Additional capacity can be reserved using add-ons, while usage billing stays the same.

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.