Preview. These maps are our reading of public sources and haven't been checked with the projects' maintainers yet.
Zero (Rocicorp)
Query-driven sync engine that replicates Postgres into zero-cache and syncs query-based row subsets to TypeScript clients with optimistic local reads/writes.
zero.rocicorp.devActive
Zero 1.0 GA as of March 2026; @rocicorp/zero 1.11.3 published 2026-10-24; Cloud Zero not yet fully public. (checked 2026-10-25)
In Local-first
Where it stands apart
- Which shared standard or format does it mainly build on? your Postgres (logical replication) (5% of 21 others)
- Does an app built on it keep working fully offline, for both reads and writes? partly (reads only, or only data that was cached) (10% of 21 others)
- Where does synced data live on the server side? in your existing Postgres or other database (19% of 21 others)
What it shares with most of the community
- Is it actively maintained? active (76% of 21 others)
- How is the main thing licensed? permissive open source (MIT/Apache/BSD) (67% of 21 others)
- How is it mainly sustained? company with a paid product, tier, or ads (62% of 21 others)
- Can it run entirely on your own device or infrastructure, without the maker's servers? yes (81% of 21 others)
- Do you need an account to use it? no account (71% of 21 others)
- Who is it for? developers (90% of 21 others)
- What does it need to sync between devices? (first that applies) a sync server or relay (yours or hosted) (52% of 21 others)
- If the company behind it disappeared, would apps keep working? yes (81% of 21 others)
- Is end-to-end encryption built in? no (80% of 20 others)
Nearest neighbors
- ElectricSQL 94% of 18 shared answers match
- InstantDB 67% of 18 shared answers match
- Jazz 67% of 18 shared answers match
Every answer
| Question | Answer | Source |
|---|---|---|
| Is it actively maintained? | active Zero 1.0 GA as of March 2026; @rocicorp/zero 1.11.3 published 2026-10-24; Cloud Zero not yet fully public. | 2026-10-25 |
| How is the main thing licensed? | permissive open source (MIT/Apache/BSD) v4: from the map's own 'license' question. Apache-2.0 | source 2026-10-25 |
| How is it mainly sustained? | company with a paid product, tier, or ads v4: from the map's own 'business' question. Rocicorp sells Cloud Zero (Hobby $30/mo, Pro $300/mo, BYOC) and support. | source 2026-10-25 |
| Can it run entirely on your own device or infrastructure, without the maker's servers? | yes v4: from the map's own 'self_host' question. | source 2026-10-25 |
| Do you need an account to use it? | no account Open-source, self-hosted zero-cache; quickstart mentions no sign-up. Cloud Zero not public. | source 2026-10-26 |
| Who is it for? | developers v4: from the map's own 'audience' question. | source 2026-10-25 |
| Which shared standard or format does it mainly build on? | stands apart your Postgres (logical replication) Replicates your Postgres into zero-cache. | source 2026-10-26 |
| Does an app built on it keep working fully offline, for both reads and writes? | stands apart partly (reads only, or only data that was cached) Explicitly does not support offline writes; reads of synced data keep working while disconnected. | source 2026-10-25 |
| What does it need to sync between devices? (first that applies) | a sync server or relay (yours or hosted) zero-cache plus your API endpoints for queries/mutators. | source 2026-10-25 |
| If the company behind it disappeared, would apps keep working? | yes Open source and fully self-hostable; data lives in your Postgres. | source 2026-10-25 |
| Is end-to-end encryption built in? | no | source 2026-10-25 |
| What shape of data does your app read and write? | relational tables (SQL or a relational query language) | source 2026-10-25 |
| How are concurrent edits resolved? (first that applies) | a server decides (it rebases or rejects client writes) Mutators run optimistically on client, then authoritatively on your server; client rebases. | source 2026-10-25 |
| Where does synced data live on the server side? | stands apart in your existing Postgres or other database Postgres. | source 2026-10-25 |
| Where does it keep data on the client by default, on its main platform? | IndexedDB or other browser storage IndexedDB on web; SQLite on React Native. | source 2026-10-25 |
| How much data syncs to each client? | subsets chosen by queries | source 2026-10-25 |
| Which platforms are first-class? | JavaScript on web and mobile (React Native, Expo, Capacitor) React, SolidJS, React Native; TypeScript clients only (no native Swift/Kotlin). | source 2026-10-25 |
| Are auth and permissions built in? | partly or via hooks Permissions enforced in your own query/mutate endpoints; JWT/cookie auth passthrough. | source 2026-10-25 |
Sources
This page was derived from:
- GitHub · github.com/rocicorp/mono · read 2026-10-25
- Web page · zero.rocicorp.dev · read 2026-10-25
- Web page · zero.rocicorp.dev/docs/auth · read 2026-10-25
- Web page · zero.rocicorp.dev/docs/connection · read 2026-10-25
- Web page · zero.rocicorp.dev/docs/mutators · read 2026-10-25
- Web page · zero.rocicorp.dev/docs/queries · read 2026-10-25
- Web page · zero.rocicorp.dev/docs/react-native · read 2026-10-25
- Web page · zero.rocicorp.dev/docs/self-host · read 2026-10-25
- Web page · zero.rocicorp.dev/llms.txt · read 2026-10-25
Are you a maintainer? Claiming and correcting projects is coming soon.