#1
ntfy is a lightweight HTTP pub-sub service to send push notifications to phones, desktops, and browsers via PUT/POST or a REST API.
33.8k stars1.6k forksApache-2.0last commit Actively maintained
6 self-hosted OneSignal alternatives
Customer messaging platform for web and mobile applications that sends push notifications, in‑app messages, email, and SMS. Includes audience segmentation, automation, scheduling, SDKs/APIs, analytics and webhooks for building and measuring engagement campaigns.
Alternatives to OneSignal
#2
Svix is an open-source webhook service that handles event ingestion, signing, retries, and endpoint management with scalable delivery and client libraries.
3.4k stars273 forksMITlast commit Actively maintained
Developer-focused platform for automated, omnichannel messaging (email, SMS, push, WhatsApp) with low-code journeys, segmentation, templates, and self-hosting.
2.9k stars380 forksMITlast commit Actively maintained
Open-source customer engagement and product onboarding platform for building event-triggered journeys and sending email, SMS, push notifications, and webhooks.
2.6k stars206 forkslast commit Actively maintained
#5
Open-source multi-channel notification service with REST API, management UI, templates and channel abstraction for email, web, push and SMS; built with ASP.NET Core and React.
878 stars83 forksMITlast commit Actively maintained
Lightweight Go service that forwards events from a standalone Frigate NVR to Discord, Matrix, SMTP, webhooks and many services (via Apprise). Supports MQTT or direct API and Docker.
408 stars43 forksMITlast commit Slowing down
What replacing OneSignal actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 5 of 6 shipped a commit in the last six months. Licences in this list: Apache-2.0, MIT. In exchange you take on hosting, backups and updates yourself.
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