Top 12 Open-Source Alternatives to PubNub

PubNub

PubNub is a real-time messaging system for web and mobile apps that can handle API for all platforms and push messages to any device anywhere in the world in a fraction of a second without having to worry about proxies, firewalls or mobile drop-offs.

The top open-source alternatives to PubNub are Pusher, Socket.io, and OneSignal. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Pusher Landing Page
1

Pusher

Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.
Pricing:
- Open Source
#Mobile Push Messaging #Developer Tools #App Development 50 social mentions
Socket.io Landing Page
2

Socket.io

Realtime application framework (Node.JS server)
Pricing:
- Open Source
#Developer Tools #App Development #Mobile Push Messaging 717 social mentions
OneSignal Landing Page
3

OneSignal

Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
Pricing:
- Open Source
- Freemium
- Free Trial
- $9.0 / Monthly (Plus usage-based costs. (Growth Plan). )
#Mobile Push Messaging #Web Push Notifications #Push Notifications 25 social mentions
Supabase Landing Page
4

Supabase

An open source Firebase alternative
Pricing:
- Open Source
#Developer Tools #Realtime Backend / API #Backend As A Service 429 social mentions
Scaledrone Landing Page
5

Scaledrone

Realtime messaging service
Pricing:
- Open Source
#Mobile Push Messaging #Developer Tools #Realtime Backend / API
NATS Landing Page
6

NATS

NATS.io is an open source messaging system for cloud native applications, IoT messaging, Edge, and microservices architectures.
Pricing:
- Open Source
#Developer Tools #Queueing, Messaging And Background Processing #App Development 63 social mentions
SocketCluster Landing Page
7

SocketCluster

An open, scalable realtime engine for Node.js
Pricing:
- Open Source
#Developer Tools #App Development #Mobile Push Messaging 8 social mentions
Etebase Landing Page
8

Etebase

Etebase makes it easy to build end-to-end encrypted applications by taking care of the encryption and its related challenges.
Pricing:
- Open Source
#Mobile Push Messaging #Realtime Backend / API #CRM
Apache Flink Landing Page
9

Apache Flink

Flink is a streaming dataflow engine that provides data distribution, communication, and fault tolerance for distributed computations.
Pricing:
- Open Source
#Stream Processing #Big Data #Developer Tools 27 social mentions
emitter.io Landing Page
10

emitter.io

Real-time communication service for connecting online devices.
Pricing:
- Open Source
#Developer Tools #Mobile Push Messaging #App Development
deployd Landing Page
11

deployd

API development tool for Web and Mobile developers.
Pricing:
- Open Source
#Developer Tools #App Development #Mobile Push Messaging
Truepush Landing Page
12

Truepush

Unleash limitless possibilities with Truepush and save up to $600 monthly. Free up to 10K Subscribers on all features.
Pricing:
- Open Source
- Free
- Free Trial
#Web Push Notifications #Group Chat & Notifications #Mobile Push Messaging