SocketLabs
Brevo
Sparkpost
Pepipost
MailChimp
Mailgun
SMTP2GO
turboSMTP
Email List Verify
NeverBounce
ZeroBounce
Email Verifier
Proofy
BriteVerify
Trumail
Kickbox
SocketLabsBased on our record, Email List Verify seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If you're not getting the right email addresses from ContactOut and it's bouncing back, you could always run the email addresses through something like emaillistverify.com to make sure they're valid before you try to email them. (you should do that always anyway to protect your email deliverability). Source: over 1 year ago
Emaillistverify.com is the service I use. Source: over 1 year ago
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
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.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Pepipost - Use our powerful Email APIs to deliver all your business critical emails on time and to the Inbox. We are the world’s only ESP that gives cashback on emails opened.
Email Verifier - Email verifier app lets you verify email.