Choose MailerSend if you want to read back the full content of each message after it is sent. Choose Twilio SendGrid if you want app email and newsletters on one sender. Each begins with a free plan. Paid plans are billed monthly, and the top plans are quoted.
Ecommerce stores and agencies sending for clients are the buyers MailerSend targets. It keeps the full body of sent messages for a stated period, so a team can check what a customer actually received. It also adds SMS messaging as a paid add-on and watches a sending domain for DMARC and blocklist problems. Broadcast and newsletter sending live in its sister product MailerLite, so a team that wants both runs two products.
Twilio SendGrid suits marketing teams that want campaigns to share a sender reputation with app email. Its transactional and broadcast mail travel on separate streams, which protects each one's reputation. A sandbox lets developers try API calls with nothing delivered. Newsletters and drip series run from the same sender. Single sign-on comes with a higher plan.
Users of MailerSend praise human support that answers quickly, and a developer experience built on a simple API and clear documentation. They complain that accounts get suspended after spam complaints and that verifying a new account is strict. Reviewers of Twilio SendGrid value inbox placement and a friendly interface. They complain about slow support, billing and cancellation problems, and locked accounts.
In a MailerSend customer story, a school teaching a no-code app builder routes password resets, subscription renewals and course confirmations through the service. The school finds deliverability is no longer a concern. One SendGrid customer, a neighborhood social network, began with notification emails. Twilio SendGrid later carried its marketing emails, and building the same email takes fewer clicks than in the network's previous tool.