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Choosing a Cloud Messaging Service


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AWS SQS AWS SNS AWS EventBridge Cloudflare Queues
Service Quotas 120,000 messages (Standard), 20,000 messages (FIFO) 100,000 topics, 12,500,000 subscriptions/topic 100 event buses, 300 rules/bus 1,000,000 request/month included (paid plan required)
Input Transformation No No Yes No
Max Message Size 256 kB 256 kB 256 kB 128 kB
Cross Region No Yes, for AWS Lambda Targets must be in the same Region. You can publish to a bus in another region Yes
Retry policy No SQS and Lambda: 23 days; SMS, SMTP and Mobile Push: 6 hours; exponential backoff retry At-least-once, exponential backoff retry for up to 24 hours Up to 100 retries
Pricing Variable per region, US$ 0.40/million messages (Standard), US$ 0.50/million messages (FIFO) Variable per endpoint, Free for AWS events, US$ 0.50/million requests (Mobile Push), US$ 2.00/100,000 requests (E-mail) Free for AWS events, US$1.00/million events 1,000,000 request/month + US$ 0,40/million requests (paid plan required)