Simple pricing

$0.0033 / agent minute.

One usage rate at any scale. Plans determine SLA, support, and capacity guarantees (if you also use our STT and TTS models) — not the price per minute.

Included in all plans:

LLM Optimization

Regional TTS caching

11 regions

PII redaction

Noise cancellation

Transcripts

Automatic failover

Plans

Most popular

Pro

Startups & Production

$25 / month
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    $0.0033 / agent minute
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    Email support
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    Standard SLA
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    When using SLNG STT & TTS Models
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    - Concurrency | from 5 agents
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    - Concurrency | Burst: up to 15 agents
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    - Concurrency | Beyond 15: Rate limited

Hobby

Evaluation & prototyping

$0Free | Pay As you go
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    $0.0033 / agent minute
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    $4 signup credit
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    Community support
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    No SLA

Enterprise

Compliance & Capacity Guarantees

Custom/ month
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    $0.0033 / agent minute
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    Email & Slack support
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    Enterprise SLA
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    When using SLNG STT and TTS Models
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    - Concurrency | Guaranteed: Custom
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    - Concurrency | Burst: Custom
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    - Concurrency | Beyond Burst: Custom

SLNG does not gate core capability by plan. You get the same Voice AI Cloud on every plan across these core capabilities.

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STT — any model (+ US$ 0.0033 / per agent min)

Gradium, Deepgram, Speechmatics, AssemblyAI, Soniox, Whisper, Gladia, pyannoteAI, Voxtral, Savram AI — swap freely, pay per minute, automatic failover.

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TTS — any model (US$ 0.0033 / per agent minute)

Gradium, Rime, Deepgram, Cartesia, InWorld, Savram AI, Soniox, KugelAudio, MURF.AI — swap freely, pay per minute, automatic failover.

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One API to run everything

Route STT, LLM, and TTS through a unified gateway with smart selection and enforced behavior.

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Compliance-ready execution

Region and country rules enforced at runtime. Data stays in-region. SOC 2, ISO 27001, HIPAA, GDPR.

Compare plans by how you run

All plans run on the same Voice AI Cloud. What changes is how much scale, support, and guarantees you get.

Gateway
Burst Handling
Regional Failover
Infrastructure Capacity Type
Shared
Model Access
Model Access Type
Shared
Model Routing
Standard routing
Regional Execution Control
Regional routing
Agents
Agent Concurrency
1
Additional Agent Concurrency
Agent Templates
Customizable templates
Behavioral Guardrails
Standard
SIP Trunking
Available add-on ($0.005/minute)
Agent Runtime Environment
Shared runtime
Tool Integration
Standard
Support & Commercial
Support Level
Community
Service Level Agreement (SLA)
None
Volume Discounting
Custom Contract Terms
Month to month

Faqs

FAQs – How billing works.

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.

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