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Zero

Sync engine that puts a queryable client cache in front of your own Postgres.

zero.rocicorp.devzero.rocicorp.dev/docsgithub.com/rocicorp/mono
Overall in convex alternatives
3of 11 · score 70.8
Data coverage
92%
24 of 26 fields sourced

Best for

  • •Teams with an existing Postgres who want a UI that feels local
  • •Apps where snappy reads matter but ownership of the data model is non-negotiable
  • •Adding sync incrementally rather than rewriting onto a backend platform

Strong on

  • +Local-first sync Yes 1/11
  • +TS inference Yes 1/11
  • +Optimistic writes Yes 1/11
  • +Schema changes sql-migrations 1/11

Weak on

  • −Auth bring-your-own 8/11
    Better: Supabase: built-in
  • −MCP server No 8/11
    Better: Convex: Yes
  • −File storage No 8/11
    Better: Convex: Yes
  • −Egress metered No 8/9
    Better: Convex: Yes

vs ElectricSQL

  • •Ahead on TS inference: Yes vs Partial
  • •Ahead on Local-first sync: Yes vs Partial
  • •Behind on Egress metered: No vs Partial
  • •Behind on Exit cost: 3 vs 2

How Zero scores among 11 convex alternatives24 of 26 fields known

Features13

Reactivity1st
push
1/11
zero.rocicorp.dev · 2026-07-20
TS inference1st
Yes
1/11
zero.rocicorp.dev · 2026-07-20
Transactions1st
mvcc
1/11
Local-first sync1st
Yes
1/11
zero.rocicorp.dev · 2026-07-20
Optimistic writes1st
Yes
1/11
zero.rocicorp.dev · 2026-07-20
Cron & scheduling
No
7/11
Leader: Convex · Yes
File storage
No
8/11
Leader: Convex · Yes
Vector search
Partial
6/11
Leader: Convex · Yes
Full-text search
Partial
5/11
Leader: Convex · Yes
Auth
bring-your-own
8/11
Leader: Supabase · built-in
zero.rocicorp.dev · 2026-07-20
Hard limits
Client cache size is the practical ceiling, the query set you sync has to fit on the device.
Cold start
—
Function timeout
—

Portability & exit5

Exit cost
3
5/11
Leader: Neon + Drizzle · 1
Self-hostable1st
Yes
1/11
zero.rocicorp.dev · 2026-07-20
Bulk export1st
Yes
1/11
Raw SQL1st
Yes
1/11
Schema changes1st
sql-migrations
1/11

Agentic2

MCP server
No
8/11
Leader: Convex · Yes
Agent fit
3
5/11
Leader: Convex · 5

Pricing3

Pricing model
free (self-host)
Entry price1st
$0/mo
1/10
Egress metered
No
8/9
Leader: Convex · Yes

Traction2

GitHub stars
3,000
10/10
Leader: Supabase · 90,000
Backing3rd
venture-backed
3/11
Leader: Firebase · big-tech

Positioning1

Positioning
A general-purpose sync engine for the web.
zero.rocicorp.dev · 2026-07-20

Alternatives8

Compare

Sources5

Zero logo & brand colours

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