Top 11 Open-Source Alternatives to Postscript

Postscript

Like Mailchimp for SMS.

A startup from Scottsdale, the United States that is founded by Adam Turner.

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Product categories

Communication Messaging Chat SDK Customer Engagement Email Marketing Enterprise Communication Online Meetings SMS Marketing Voice And Messaging API AI Appointments and Scheduling Business Text Messaging

Summary

The top open-source alternatives to Postscript are Twilio, Sonar, and OpenTok. 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.

Twilio Landing Page
1

Twilio

Brings voice and messaging to your web and mobile applications.
Pricing:
- Open Source
#Messaging #Communication #Communications SDK
Sonar Landing Page
2

Sonar

2-way chat with your customers over SMS and FB Messenger
Pricing:
- Open Source
#Email Marketing #Email Marketing Platforms #Newsletter Marketing
OpenTok Landing Page
3

OpenTok

Build a custom video experience using our robust APIs, or add plug-and-play video to your website in minutes using Video Chat Embeds. Start Building for FreeTalk to SalesTalk to Sales .
Pricing:
- Open Source
#Messaging #Communication #Customer Engagement
Sinch Landing Page
4

Sinch

Sinch is a powerful voice and messaging SDK that lets you bring your apps to life with VoIP and...
Pricing:
- Open Source
#Messaging #Business Text Messaging #Communication 1 social mentions
OutrightSys Twilio SMS for SuiteCRM Landing Page
5

OutrightSys Twilio SMS for SuiteCRM

SuiteCRM Twilio SMS adds powerful functionality to message API. Twilio SMS addon magnifies customer interaction by using SMS templates, live chat & Opt-Out option.
Pricing:
- Open Source
- Paid
- $299 / One-off
#Sales #CRM #Communication
Fonoster Landing Page
6

Fonoster

A marketplace where local telecom companies can publish numbers, developers can build voice, video, and chat solutions.
Pricing:
- Open Source
#Marketing #Appointments and Scheduling #Email Marketing 1 social mentions
WebRTC Landing Page
7

WebRTC

WebRTC is a free, open project that enables web browsers with Real-Time Communications (RTC) capabilities via simple JavaScript APIs. The WebRTC components have been optimized to best serve this purpose.
Pricing:
- Open Source
#Communication #Online Meetings #Group Chat & Notifications 50 social mentions
RingCentral Landing Page
8

RingCentral

RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Pricing:
- Open Source
- Freemium
- Free Trial
- $19.99 / Monthly (All-in-One Phone, Team Messaging, and Video Conferencing.)
#Enterprise Communication #Communication #Online Meetings 3 social mentions
CometChat Landing Page
9

CometChat

Seamless Real-Time Chat Integration for Your Applications.
Pricing:
- Open Source
- Freemium
- Free Trial
- $109 / Monthly (Based on the Monthly Active Users (MAUs))
#Instant Messaging #Communication #Voice And Messaging API 5 social mentions
Chat by Stream Landing Page
10

Chat by Stream

Build and ship in app messaging in a few hours
Pricing:
- Open Source
#Messaging #Communication #Voice And Messaging API 40 social mentions
Amazon Connect Landing Page
11

Amazon Connect

A self-service, cloud-based call center 📞
Pricing:
- Open Source
#Enterprise Communication #Communication #Phone System 9 social mentions