There are many projects developing sync tech for local-first, I work on a fully open source one - ElectricSQL - and we are fortunate to have a couple of the CRDT co-inventors on the team. We maintain a list of any local-first sync project we know of here: https://electric-sql.com/docs/reference/alternatives
Electricsql looks cool but on a mobile browser the "local first" instant reactivity example is waaaay slower than the cloud version. Latencies of 600+ms Vs 120ms.
The comparison list is very useful as a collection, thank you.
