The best alternatives to Democracy.io by EFF are Resistbot, Countable 3.0 for iOS, and Polliticly. If these 3 options don't work for you, we've listed a few more alternatives below.
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Haggle — A CTA buyers want to click, when they aren't ready to demo
Polliticly uses community sourced polling and seamless elected official messaging in effort to improve civic engagement and give people influence in local legislation.