The best alternatives to SameTime.co are Signup!, Groupies, and Whalfred. If these 3 options don't work for you, we've listed a few more alternatives below.
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Universal-2 by AssemblyAI— Speech-to-Text API for conversational data
Create reminders by simply messaging the Whalfred Whatsapp contact, such as “Check in for London’s flight @ next Friday”. When the time comes, Whalfred will send the message back to you. It’s completely free for now.
Host a temporary group text, powered by SMS, that's anonymous and shareable anywhere. No app downloads. Optionally charge people to join, and earn. Groups are deactivated after the chosen duration - up to an hour. Host for free, or charge up to $50 to join.
TxtReminders sends text messages to help its users get things done and stay informed. Users can schedule recurring, persistent txt messages with content like birthday/pill reminders, or bring in on-demand content like weather, crypto/forex pricing, and more.