SLNG Alternatives
Voice agent infrastructure that routes across STT, TTS and LLM providers with region-pinned execution
SLNG is an execution layer for real-time voice agents.
Explore 68 alternatives to SLNG across 2 categories. Each tool listed below shares at least one category with SLNG.
Top SLNG alternatives at a glance
- LiveKit Agents. Open-source framework for building real-time voice and multimodal AI agents over WebRTC
- Samtal. Swedish-hosted voice AI API with TTS, ASR, voice cloning, and conversational agents. ElevenLabs-compatible
- Openspender. Payment router for AI agents: pay per request across LLM APIs and tools from a self-custodial wallet
- n8n. AI workflow automation with 400+ integrations and native AI agents
- AutoGen. Microsoft's framework for building multi-agent AI applications with event-driven messaging
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Mastra
TypeScript-first AI framework for building agents, RAG pipelines, and workflows
Letta
Framework for building stateful AI agents with persistent memory, formerly MemGPT
Google ADK
Open-source agent development kit from Google for building multi-agent systems
AG2
Community-driven multi-agent framework forked from AutoGen with backward-compatible API
Dust
The operating system for AI agents
SandBase Harness
Local-first, self-hosted runtime for auditable AI agent sessions
Laminar
Open-source agent observability with traces, failure detection and evals
Burr
Build stateful AI agents and applications as state machines, with a built-in tracing UI
Tura
Open-source local coding agent that turns intent into verified repository changes
Fixie
The fastest way to build conversational AI agents
Superagent
Prototype and deploy agents powered by large language models.
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Deepgram
Build Voice AI into your apps.
Fish Audio
Open-source text-to-speech and voice cloning with low latency in 13+ languages
VoxCPM
Tokenizer-free open-source text-to-speech with voice cloning across 30 languages
Frequently asked questions
What are the best alternatives to SLNG?
Based on category overlap and popularity, the top alternatives to SLNG include: LiveKit Agents (Open-source framework for building real-time voice and multimodal AI agents o...); Samtal (Swedish-hosted voice AI API with TTS, ASR, voice cloning, and conversational ...); Openspender (Payment router for AI agents: pay per request across LLM APIs and tools from ...); n8n (AI workflow automation with 400+ integrations and native AI agents); AutoGen (Microsoft's framework for building multi-agent AI applications with event-dri...). See all 68 alternatives compared on this page.
Is there a free alternative to SLNG?
Yes. 57 alternatives to SLNG offer a free tier or free trial: LiveKit Agents, Openspender, n8n, AutoGen, LangGraph, Composio, and more. Use the comparison above to find the best fit for your use case.
Are there open-source alternatives to SLNG?
Yes. 29 of the 68 alternatives to SLNG listed here are open source: LiveKit Agents, AutoGen, CrewAI, LangGraph, Composio, Semantic Kernel, and more. Open-source tools can be self-hosted for full control over data and infrastructure.
What is SLNG?
SLNG is an execution layer for real-time voice agents. It sits between an application and the speech stack, routing across providers (Cartesia, Deepgram, AssemblyAI, Rime, Speechmatics, Resemble, OpenAI and others) behind one API and one set of rules. Agents are declared as code through UNMUTE, ... See 68 alternatives to SLNG across 2 categories.
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