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Sonar vs KTransformers: catalog facts
Sonar	KTransformers
Free Free and open source under the AGPL-3.0 licence.	Free Free to use; published on GitHub.
macOS, Linux, Self-hosted, Command line	Linux, Self-hosted
OpenAI-compatible API with streaming, embeddings and tool calls Continuous batching and several forms of parallelism for many concurrent users	Runs very large models by offloading between CPU and GPU Supports LoRA fine-tuning as well as inference
Aimed at server deployments rather than casual desktop chat Recently renamed from Aphrodite Engine, so older guides use the old name	Aimed at technical users comfortable with setup and configuration Needs substantial hardware for the largest models
Downloadable app, Self-hosted	Self-hosted
Open source	Closed source
License: AGPL-3.0	License not stated
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.