BulkSMS
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BulkSMS is a pure SMS, MMS, and RCS gateway connecting to 800+ carrier networks across 213 countries. The platform emphasizes delivery reliability and competitive rates for high-volume sending. It's been operating since 1997 and prioritizes simplicity and carrier relationships over feature breadth.
BulkSMS appeals to developers and teams that need rock-solid SMS delivery without extra features. It's more of an infrastructure play than a marketing platform, making it a good choice for transactional and promotional SMS at scale.