Best SmtpJS Alternatives in 2026
Based on real usage data from 0 websites analyzed by StackSee
We analyzed real website data to find the most popular alternatives to SmtpJS. SmtpJS is smtpJS is a free library you can use for sending emails from JavaScript. See which tools teams actually use instead, backed by real-time detection data.
Top Alternatives to SmtpJS
Technologies in the Email category that teams use instead of SmtpJS, ranked by adoption.
Frequently Asked Questions
What are the best alternatives to SmtpJS?
Based on StackSee's real-time analysis of 0 websites, the top alternatives to SmtpJS include Campaign Monitor, Carts Guru, Clearout, Clearstream, CleverReach, and 45 more. These are the technologies that teams most commonly use in the Email category.
How many websites use SmtpJS?
StackSee detects SmtpJS across thousands of websites using real-time browser analysis. Scan any website to check if it uses SmtpJS.
How does StackSee detect SmtpJS?
StackSee uses multiple real-time detection methods including JavaScript fingerprinting, DOM analysis, HTTP header inspection, and pattern matching to accurately identify SmtpJS and its alternatives on any website. Unlike static databases, our data reflects the current state of each website.
Find which of your prospects use SmtpJS
StackSee scans websites in real time to detect SmtpJS and 50+ alternatives. Discover which companies are ready to switch.
About SmtpJS
SmtpJS is a free library you can use for sending emails from JavaScript.
- Website
- smtpjs.com
- Categories
- Type
- Open Source