Queues and streaming

15 services

Queue and streaming free tiers count messages or operations per month, and often cap connections, queues and message size as well. Amazon SQS includes 1M requests and Amazon SNS 1M publishes a month; SQS counts each receive call, including empty polls, so long polling stretches the allowance. Cloudflare Queues allows 1M operations a month. CloudAMQP hosts RabbitMQ with 1M messages a month, 20 concurrent connections and 100 queues. Azure Service Bus is a 12-month offer, not a permanent tier.

For IoT and MQTT, HiveMQ connects up to 100 devices and EMQX Serverless includes 1M session minutes a month, both without a card. For streams, ntail.io offers Kafka-compatible topics, 10 of them, at 200 KiB/s of ingress, and synadia.com runs managed NATS with 5 GB of data a month, 50 connections and a 4 KB maximum message size. Inngest and Estuary fit when the goal is background jobs or change data capture rather than raw messaging.

15 services

Amazon SNS

Pub/sub messaging that fans out to queues, functions, HTTP endpoints, SMS and push.

1M publishes/mo

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Amazon SQS

Fully managed message queues for decoupling services on AWS.

1M requests

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Azure Event Grid

Event routing service delivering pub/sub events between Azure services and apps.

100,000 ops/mo

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Azure IoT Hub

Managed hub for two-way messaging between cloud apps and IoT devices.

8,000 messages/day

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Azure Service Bus

Enterprise message broker with queues and topics for decoupling applications.

  • Expires

750 hrs

13M operations, 12 months

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CloudAMQP

Hosted RabbitMQ brokers, with clustered nodes spread across availability zones.

1M messages/mo

20 concurrent connections, 100 queues, 10,000 queued messages

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Cloudflare Queues

Message queues for sending and consuming batches of work between Workers.

1M operations/mo

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EMQX Serverless

Serverless MQTT broker for IoT devices, provisioned on demand without managing nodes.

  • No card

1M session minutes/mo

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Estuary

Real-time CDC and batch data pipelines with 200+ managed connectors.

  • No card

10 GB data moved/mo

2 connector instances

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HiveMQ

Managed MQTT broker in the cloud for connecting IoT devices and sensors.

  • No card

100 connected devices

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Hook Relay

Outgoing webhook delivery service with queues, backoff retries and delivery logs.

100 deliveries/day

3 endpoints, 14 days retention

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Inngest

Durable workflow engine running event-driven background jobs in TypeScript, Python and Go.

  • No card

50,000 executions/mo

500,000 events/mo, 5 concurrent steps

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ntail.io

Hosted Kafka-compatible streaming without servers to run, billed by throughput.

  • No card

10 topics

200 KiB/s ingress, 400 KiB/s egress, 1 day retention

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synadia.com

Managed NATS messaging network running across AWS, GCP and Azure regions.

5 GB data/mo

50 active connections, 4 KB max message size

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superfeedr.com

Real-time feed hub using PubSubHubbub, with feed export and analytics.

Limits not listed

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