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

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