> New client setup happens via Marco in a proprietary way on the order of seconds

Do you consider this your "ActiveSync" and if so what do you see as the differentiating features/capabilities?

Genuinely had to look that up. Not familiar with Microsoft speak.

From a quick look, it indeed looks similar. Although I imagine Microsoft's implementation is filled with cruft.

We use Replicache + Orama. _All_ data is fully offline on the client and synced to the BE when network is available. Orama handles indexing and full text search, filtering, sorting, etc, all in single-digit ms.

Let me know if you have any follow-up questions!