Changelog

All notable changes to SendSend.

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February 2026

Batch delivery API

You can now submit up to 50,000 items in a single API call. Items are automatically distributed across worker nodes for optimal throughput while respecting your rate limits.

• Added POST /v1/jobs batch endpoint
• Configurable batch sizes per delivery config
• Real-time progress tracking via dashboard

Per-provider rate limiting

Configure rate limits on a per-destination basis. SendSend automatically queues excess items and delivers them as capacity becomes available.

• Max requests per second per provider
• Max concurrent connections per provider
• Automatic backpressure handling

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January 2026

Real-time dashboard

Monitor your deliveries in real-time with the new dashboard. Track success rates, latency percentiles, and delivery progress across all your configs.

• Live delivery progress bars
• Success/failure rate charts
• Latency P50/P95/P99 tracking
• Detailed error logs with stack traces

Automatic retries

Failed deliveries are now automatically retried with exponential backoff and jitter. Configure retry policies per delivery config.

• Configurable max attempts (1-10)
• Exponential backoff with jitter
• Dead letter queue for exhausted retries

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December 2025

Initial release

SendSend is live! The delivery API for modern applications.

• REST API for creating delivery jobs
• Basic rate limiting
• Webhook delivery support
• Dashboard for monitoring