Email Hosting Providers

SendgridSendgrid

Sendgrid Usage Statistics · Download List of All Websites using Sendgrid

SendGrid's cloud-based email infrastructure provides businesses with email delivery management.

Transactional Email

FreshdeskFreshdesk

Freshdesk Usage Statistics · Download List of All Websites using Freshdesk

An online help desk software that allows you to support customers over email

CRM

ZendeskZendesk

Zendesk Usage Statistics · Download List of All Websites using Zendesk

Organize, prioritize and engage with others on support requests.

CRM · Ticketing System

Google Apps for BusinessGoogle Apps for Business

Google Apps for Business Usage Statistics · Download List of All Websites using Google Apps for Business

Web-based email, calendar, and documents for teams. Renamed to Google Apps for Work, but now known as G Suite From Google Cloud.

Business Email Hosting

SPFSPF

SPF Usage Statistics · Download List of All Websites using SPF

The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.

Standard

Web Hosting Providers

HerokuHeroku

Heroku Usage Statistics · Download List of All Websites using Heroku

US based open language cloud application hosting platform supporting multiple languages such as Ruby, Java, NodeJS and Clojure.

Cloud Hosting · Cloud PaaS · US hosting

Verified CDN

Amazon S3 CDNAmazon S3 CDN

Amazon S3 CDN Usage Statistics · Download List of All Websites using Amazon S3 CDN

Amazon S3 is storage for the Internet. It is designed to make web-scale computing easier for developers.