Based on our record, mailboxlayer API should be more popular than Bugfender. It has been mentiond 5 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.
I've found a few "free" APIs which tell you if the email address exists or not, they have a free tier for certain amount of queries. Try https://mailboxlayer.com and https://www.zerobounce.net. Source: almost 2 years ago
What I mean by valid is whether it is deliverable or not. Like this https://mailboxlayer.com/. Source: almost 2 years ago
In Inspector we use the mailboxlayer.com API to validate emails. The service is also able to detect fake email addresses, temporary addresses, and the actual existence of an email address using MX-Records and SMTP. - Source: dev.to / about 2 years ago
You can look into APIs ( example https://mailboxlayer.com/ ) they provide info whether email is from a disposable domain. Source: almost 3 years ago
Mailboxlayer.com — Email validation and verification JSON API for developers. 1,000 free API requests/month. - Source: dev.to / almost 3 years ago
Bugfender.com — Free up to 100k log lines/day with 24 hours retention. - Source: dev.to / almost 3 years ago
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Bird Eats Bug - Saw a bug? Send an instant replay to engineers. It will come with console logs and everything. Developers will ❤️ you.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Marker.io - Visual feedback and bug reporting tool for websites
Email Checker - Email Checker offers a real-time API and bulk validation for list cleaning.
BugHerd - BugHerd: The Website Feedback Tool for Agencies