The MalShare Project is a community driven public malware repository that works to provide free access to malware samples and tooling to the infomation security community.
PolySwarm Alternatives
PolySwarm is described as 'More effective way to detect, analyze and respond to the latest malware threats. Polyswarm is a launchpad for innovative threat detection methods. Antivirus companies and specialized engines compete with each other to detect threats' and is a Anti-Virus app in the security & privacy category. There are more than 25 alternatives to PolySwarm for a variety of platforms, including Web-based, Windows, Linux, Mac and Android apps. The best PolySwarm alternative is VirusTotal. It's not free, so if you're looking for a free alternative, you could try VirusTotal or MetaDefender. Other great apps like PolySwarm are urlscan.io, ANY.RUN, Cuckoo Sandbox and Jotti's malware scan.