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Postscript - Like Mailchimp for SMS
BulkSMS - SMS messaging service provider offering two-way SMS communication services.
WATI - No-code chatbot builder for WhatsApp Business
Twilio - Brings voice and messaging to your web and mobile applications.
SuperDMs - SuperDMs helps you grow your following by sending bulk DMs to your tweet responders.
OpenTok - Build a custom video experience using our robust APIs, or add plug-and-play video to your website in minutes using Video Chat Embeds. Start Building for FreeTalk to SalesTalk to Sales .