Any voting software that doesn't store votes in persistent storage?

I would like to organize voting in an association election, which takes place during a meeting. It should be anonymous, while ensuring a single person can only vote once. This would probably be best achieved with personal links that could be distributed by email. The votes should not be stored persistently (in a database) as accidentally losing the votes doesn’t matter, but the votes must be deleted once the election part of the meeting (lasting 15-30min) is over.