GetChat.App - Add WhatsApp chat to your website for free
BlueReceipt - Text marketing customers love ❤️
Avochato - Text messaging for your business.
Textedly - Textedly is an SMS marketing communications channel that allows to advertise, promote, announce, and engage with audience through text messaging directly to cell phones.
Talkus - Chat with your website users from Slack
Mailify - Mailify offers email marketing software application to design, create and send email marketing campaigns.