If you're looking for a chatbot to help you sign up to vote and keep your voter registration intact, Resistbot is a good candidate. The chatbot connects citizens with their representatives and has features like voter registration protection, which lets you check and protect your registration with a text message to "Check." It's also shown success in boosting voter turnout and offers a premium membership for more services.
Another good option is ChatGPT, a general purpose AI-powered chatbot tool that can help with lots of things, from answering questions to getting more work done. Its primary purpose is broader assistance, not voter registration, but you can use it to find information and get things done about voting.
You could also check out ChatBot, a service geared for automating customer service for businesses. It's geared for customer service, but its generative AI foundation can produce human-sounding answers, so you could use it to help with voter-related questions or other civic duties. The service requires no technical expertise to set up and integrate with common tools.
If you want to build your own chatbot, ChatBotKit is a full featured platform for developers and nontechies. It supports multiple interfaces, languages and integration with popular chat apps, so it's a good option for deploying conversational AI chatbots to handle lots of tasks, including voter registration.