# SLNG

**Canonical:** https://apis.io/providers/slng/  
**Website:** https://docs.slng.ai  
**APIs profiled:** 15

SLNG is a compliance-first speech AI gateway that gives developers a single, unified API for speech-to-text, text-to-speech, and LLM-driven voice agents across 30+ models from providers like Deepgram, Rime, Cartesia, ElevenLabs, and OpenAI Whisper. The platform acts as an execution layer between an orchestrator and the models, routing each request to in-region compute across 60+ regions and 11 sovereign hubs for low latency and local data residency (GDPR), with ISO 27001 certification and HIPAA compliance. Every model is reachable over HTTP or streaming WebSocket, with bring-your-own-key billing, batch transcription, pronunciation dictionaries, and per-minute pricing. Founded in Barcelona in 2025 and backed by a pre-seed round led by Earlybird.

## Kin Score — 59.4 / 100 (strong)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 59.4).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 76.2 |
| Governance | 11.5 |
| Operational Transparency | 21.1 |
| Developer Ergonomics | 79.9 |
| Commercial Clarity | 60.5 |

## Agent readiness — 46.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | derived |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | no |
| Event Surface Described | derived |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (15)

- **SLNG Account API** — Inspect the authenticated account and organization.
- **SLNG Agents API** — Voice agent CRUD.
- **SLNG Calls API** — Call dispatch and status.
- **SLNG Catalog API** — Discover and inspect available models in the SLNG catalog.
- **SLNG Deepgram Aura 2 API** — Deepgram Aura 2 for conversational voice agents.
- **SLNG Deepgram Nova 3 API** — Deepgram Nova 3 with VAD and speaker diarization.
- **SLNG Inworld Max 1.5 API** — Inworld Max 1.5 for multilingual, expressive synthesis.
- **SLNG Orpheus English API** — Orpheus TTS with emotion control.
- **SLNG Pronunciation dictionaries API** — Manage reusable pronunciation rewrite dictionaries for TTS.
- **SLNG Rime Arcana v2 API** — Rime Arcana v2 TTS with multi-language support.
- **SLNG Rime Arcana v3 API** — Rime Arcana v3 TTS with multilingual support (English, Hindi).
- **SLNG Rime Coda API** — Rime Coda TTS for Bahasa Indonesian.
- **SLNG Sessions API** — Web (non-telephony) sessions.
- **SLNG Speechmatics API** — Create and manage asynchronous transcription jobs.
- **SLNG Whisper Large v3 API** — Whisper Large v3 with 99+ language support.

## MCP servers (1)

- **slng-mcp.yml**

## Agentic access (1)

- **Slng Agentic Access** — 43 operations · 31 acting · 1 human-in-the-loop

## Security (3)

- **Slng Authentication** — http · 1 scheme
- **Slng Domain Security** — TLSv1.3 · DMARC
- **Slng Trust Center** — ISO 27001, HIPAA, GDPR

## Tags

Company, Speech, Voice, Speech to Text, Text to Speech, Voice AI, Voice Agents, Transcription, Speech Recognition, Artificial Intelligence, API Gateway

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/slng/). Scores are computed from the provider's own public artifacts under a published rubric.