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Sonar vs TabbyAPI: catalog facts
Sonar	TabbyAPI
Free Free and open source under the AGPL-3.0 licence.	Free Free and open source.
macOS, Linux, Self-hosted, Command line	Windows, Linux, Self-hosted, Command line
OpenAI-compatible API with streaming, embeddings and tool calls Continuous batching and several forms of parallelism for many concurrent users	OpenAI-compatible endpoints for existing clients Lightweight server focused on ExLlama models
Aimed at server deployments rather than casual desktop chat Recently renamed from Aphrodite Engine, so older guides use the old name	Only serves ExLlama-format models No built-in chat interface; pair it with a separate front end
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open source	Open 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 September 23, 2026

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