Add user notifications to any software in 5 minutes. The free plan includes 10,000 notifications/month + 100 SMS and Automated Calls

Realtime messaging service. Free for up to 20 simultaneous connections and 100,000 events/day

Realtime messaging service. Free for up to 100 simultaneous connections and 200,000 messages/day

Multi-channel notification infrastructure for developers with a prebuilt in-app inbox and no-code template editor. Free plan includes 10,000 messages/mo

NATS.io as a service. Global, AWS, GCP, and Azure. Free forever with 4k msg size, 50 active connections, and 5GB of data per month

Single API for push, in-app, email, chat, SMS, and other messaging channels with template management and other features. The free plan includes 10,000 messages/mo

RabbitMQ as a Service. Little Lemur plan: max 1 million messages/month, max 20 concurrent connections, max 100 queues, max 10,000 queued messages, multiple nodes in different AZ's

Web Push Notifications - Free for upto 10k subscribers, unlimited push notifications, in-browser messaging

Send and receive text messages using your Android phone as an SMS Gateway. Free to send and receive up to 200 messages per month

Scalable and secure serverless MQTT broker you can get in seconds. 1M session minutes/month free forever (no credit card required)

Connect your MQTT devices to the Cloud Native IoT Messaging Broker. Free to connect up to 100 devices (no credit card required) forever

Send push notifications to your iOS and Android devices. Effortlessly integrate via API or Webhooks and maintain full control over your alerts. Free plan: 50 messages per day to 1 device and 1 application