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Syntheo needs the internet for none of its features: it has no account, no sync and no online service. What it needs is your inference servers. If they run on your computer or on your local network, everything works offline. If they are unreachable, the features that depend on them stop.

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What always works

These features call no server:
  • creating, editing and organizing your notes and folders;
  • reviewing transcripts and summaries already produced;
  • full-text search (local index);
  • exporting your notes;
  • managing your summary templates.

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What requires the transcription server

  • meeting transcription;
  • dictation;
  • importing an audio file.
Without a reachable transcription server, there is no transcription. Syntheo never keeps audio: so it cannot record now to transcribe later.
  • If no transcription provider is set up, Syntheo refuses to start the capture: “No transcription provider is set up. Syntheo does not keep audio: set up a transcription endpoint before recording.”
  • If the server becomes unreachable during a meeting, live transcription pauses and Syntheo tries to reconnect. The passage spoken during the outage will be missing from the transcript.

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What requires the summary server

  • generating summaries;
  • chatting about notes (“Ask the note”);
  • “Suggest sections” in the template editor.
Without a reachable summary server, your transcripts remain available: you can generate the summary once the server is back.

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Work entirely offline

1

Install the servers on your computer or local network

For example speaches or vLLM for transcription, Ollama or llama.cpp server for the LLM. Download the models before you disconnect.
2

Declare them in Syntheo

Follow Set up transcription and AI with local URLs, for example http://localhost:8000/v1 and http://localhost:11434/v1. Plain HTTP is accepted toward localhost and private addresses.
3

Test before the meeting

Run a short listening session, then generate a summary. If both work with the network cut off, you are ready.
Apart from inference, Syntheo makes very few requests: showing the release notes of a version other than the installed one (GitHub) and a few interface icons. They carry no meeting content and their failure blocks nothing. Full list in Syntheo Desktop and the GDPR.