mailboxlayer API vs. SendPulse

Mailboxlayer is a free, simple and powerful JSON API offering instant email address validation & verification via syntax checks, typo and spelling checks, SMTP checks, free and disposable provider filtering, and much more. Its system is REST-based, secured by 256-bit HTTPS encryption, and pursuing the goal of assisting developers and businesses in fighting fraudulent users and increasing success rates of email campaigns.

SendPulse is an AI-driven email and chatbot marketing platform that helps scaling businesses acquire, grow, and retain customers through email and chatbot conversations — all powered by a built-in CRM that streamlines sales and marketing efforts from start to finish. Trusted globally for more than 11 years, the company now serves over 200,000 customers, with substantial operations spanning Latin America (with an office in Brazil) and Europe as part of its international footprint.