---
specification: API Commons Rate Limits
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/RateLimits
provider: PowerSync
providerId: powersync
created: '2026-06-12'
modified: '2026-06-12'
reconciled: true
tags:
  - Rate Limiting
description: >-
  PowerSync Cloud enforces concurrent connection limits per plan tier; a 429
  status is returned when the peak concurrent connection limit is exceeded.
  Throughput limits govern database replication from source to PowerSync Service
  and client sync from PowerSync to clients.
sources:
  - https://docs.powersync.com/resources/performance-and-limits
headers:
  retryAfter: Retry-After
responseCodes:
  throttled: 429
limits:
  - name: Peak Concurrent Connections (Free)
    scope: org
    metric: concurrent_connections
    limit: 50
    timeFrame: session

  - name: Peak Concurrent Connections (Pro)
    scope: org
    metric: concurrent_connections
    limit: 1000
    timeFrame: session

  - name: Peak Concurrent Connections (Team)
    scope: org
    metric: concurrent_connections
    limit: 10000
    timeFrame: session

  - name: Database Replication Throughput (small rows)
    scope: org
    metric: operations_per_second
    limit: 4000
    timeFrame: second

  - name: Database Replication Throughput (large rows)
    scope: org
    metric: mb_per_second
    limit: 5
    timeFrame: second

  - name: Replication Transactions
    scope: org
    metric: transactions_per_second
    limit: 60
    timeFrame: second

  - name: Client Sync Throughput (per client)
    scope: user
    metric: operations_per_second
    limit: 20000
    timeFrame: second

  - name: Synced Buckets Per User
    scope: user
    metric: buckets
    limit: 1000
    timeFrame: session

  - name: Row / Document Size
    scope: org
    metric: mb_per_row
    limit: 15
    timeFrame: usage

  - name: Columns Per Table
    scope: org
    metric: columns
    limit: 1999
    timeFrame: usage