Top 10 Open-Source Alternatives to InboxSDK

Product categories

APIs Appointments and Scheduling Developer Tools Email Email Clients Email Delivery Email Marketing Email Marketing Platforms Enterprise Communication IDE Software Development Text Editors

Summary

The top open-source alternatives to InboxSDK are Amazon SES, Roundcube, and Tutanota. 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.

Amazon SES Landing Page
1

Amazon SES

Scale your business email & marketing messages with Amazon Simple Email Service (SES), a cost-effective and reliable cloud email service. Sign up today.
Pricing:
- Open Source
#Email Delivery #Email Marketing #Transactional Email 65 social mentions
Roundcube Landing Page
2

Roundcube

Web-based IMAP email client
Pricing:
- Open Source
#Email #SMTP Server #Email Clients 16 social mentions
Tutanota Landing Page
3

Tutanota

Get your encrypted mailbox for free.
Pricing:
- Open Source
#Email #Email Clients #Enterprise Communication 177 social mentions
Sublime Text Landing Page
4

Sublime Text

Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.
Pricing:
- Open Source
#Text Editors #IDE #Software Development 3 social mentions
Vim Landing Page
5

Vim

Highly configurable text editor built to enable efficient text editing
Pricing:
- Open Source
#Text Editors #Software Development #IDE 10 social mentions
Rainloop Landing Page
6

Rainloop

RainLoop is a web based email client.
Pricing:
- Open Source
#Email #Email Clients #Email Management
Postmark Landing Page
7

Postmark

Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.
Pricing:
- Open Source
#Email Delivery #Email Marketing #Email Marketing Platforms 49 social mentions
Cal.com Landing Page
8

Cal.com

Cal.com (formerly Calendso) is the open source Calendly alternative.
Pricing:
- Open Source
#APIs #Open Source #Calendar And Scheduling 53 social mentions
Spark Mail Landing Page
9

Spark Mail

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Pricing:
- Open Source
#Email #Email Clients #Calendar 30 social mentions
Visual Studio Code Landing Page
10

Visual Studio Code

Build and debug modern web and cloud applications, by Microsoft
Pricing:
- Open Source
#Text Editors #IDE #Software Development 1016 social mentions