The best alternatives to Postscript are Captain Share, SuperDMs, and Sonar. If these 3 options don't work for you, we've listed a few more alternatives below.
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Agree.com— Free e-signature for everyone with invoicing and payments!
SuperDMs helps you grow your following by sending bulk DMs to your tweet responders. You can use SuperDMs to send your: - Giveaways - Newsletters - Offers that are unique - Specially-curated content SuperDMs is ideal for all active Twitter users.
WhatSharer is a PWA with a simple interface to type WhatsApp messages easily and send them to multiple people or numbers you haven't saved and to generate WhatsApp message URLs that you can share on social media etc. e.g. a banner you can embed into your site.
SMS Marketing, Text Messaging Services, Mass & Bulk Texting. Textedly is an #SMSMarketing communications channel that allows you to advertise, promote, announce, and engage with your audience through #TextMessaging.