The best alternatives to Blockistan are Moderate, Trolldor, and Secateur. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
Moderate makes your Twitter feed better by taking away bad interactions and highlighting good. We’re building AI and workflow tools to help you take control of your Twitter experience. Our initial product makes it easy to find, mute and block trolls.