Customer.io Rate Limits Overview Understand Customer.io's API rate limits and implement proper throttling: token bucket limiters, exponential backoff with jitter, queue-based processing, and 429 response handling. Rate Limit Reference | API | Endpoint | Limit | Scope | |-----|----------|-------|-------| | Track API | , , | 100 req/sec | Per workspace | | Track API | Batch operations | 100 req/sec | Per workspace | | App API | Transactional email/push | 100 req/sec | Per workspace | | App API | Broadcasts, queries | 10 req/sec | Per workspace | These are approximate. Customer.io uses sliding w…