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TabbyAPI vs Sonar: catalog facts
TabbyAPI	Sonar
Free Free and open source.	Free Free and open source under the AGPL-3.0 licence.
Windows, Linux, Self-hosted, Command line	macOS, Linux, Self-hosted, Command line
OpenAI-compatible endpoints for existing clients Lightweight server focused on ExLlama models	OpenAI-compatible API with streaming, embeddings and tool calls Continuous batching and several forms of parallelism for many concurrent users
Only serves ExLlama-format models No built-in chat interface; pair it with a separate front end	Aimed at server deployments rather than casual desktop chat Recently renamed from Aphrodite Engine, so older guides use the old name
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open 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 September 23, 2026	Official website Full listing and sources Checked September 26, 2026

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