Batch
6.8#21 in push notification servicesAndroidiOSWebAPI
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Batch is aimed at CRM teams managing campaigns across multiple messaging channels and customer lifecycle stages. Its APIs, SDKs, and data platform suit organizations bringing together customer signals from mobile, web, and data warehouses.
PushEngage may suit businesses that want push messaging across web and mobile channels, with segmentation and automated workflows. The free tier is limited to one website or app and 200 subscribers.