Top 12 Open-Source Alternatives to SendGrid

The top open-source alternatives to SendGrid are Mailgun, Amazon SES, and Postmark. 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.

Mailgun Landing Page
1

Mailgun

A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.
Pricing:
- Open Source
#Email Delivery #Transactional Email #Email Marketing 11 social mentions
Amazon SES Landing Page
2

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
Postmark Landing Page
3

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
Sparkpost Landing Page
4

Sparkpost

Deliver your app and website emails on time and to the inbox. Trusted to send 25% of the world's non-spam email. Email delivery for companies big and small.
Pricing:
- Open Source
#Email Marketing #Email Delivery #Email Marketing Platforms 3 social mentions
Zoho Campaigns Landing Page
5

Zoho Campaigns

Smart email marketing software that helps you reach your target audiences, engage in a personalized way, and grow your brand presence.
Pricing:
- Open Source
- Freemium
- $25.0 / Monthly (up to 2500 contacts, unlimited emails)
#Email Marketing #Email Marketinng Automation #Email Workflow
Mailtrap Landing Page
6

Mailtrap

Email Delivery Platform that delivers just in time.  Great for businesses and individuals.
Pricing:
- Open Source
- Freemium
#Office Suites #Email #Email Testing 50 social mentions
Mailtrain Landing Page
7

Mailtrain

Self-hosted open-source Mailchimp clone
Pricing:
- Open Source
#Email Marketing #Newsletter Marketing #Email Marketing Platforms 2 social mentions
Listmonk Landing Page
8

Listmonk

Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
Pricing:
- Open Source
- Free
#Newsletter Marketing #Self-Hosted Newsletter #Email Marketing 24 social mentions
PHPMailer Landing Page
9

PHPMailer

Email sending library for PHP.
Pricing:
- Open Source
#Email Marketing #Email Delivery #Transactional Email
MJML Landing Page
10

MJML

The open source framework for responsive emails
Pricing:
- Open Source
#Email Marketing #Email Newsletters #Email Productivity 86 social mentions
Benchmark Landing Page
11

Benchmark

Benchmark provides online marketing tools to keep businesses connected to their customers and followers alike.
Pricing:
- Open Source
#Email Marketing #Email Marketing Platforms #Newsletter Marketing
OneSignal Landing Page
12

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