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   * [aikido.dev](https://www.aikido.dev) — All-in-one appsec platform covering SCA, SAST, CSPM, DAST, Secrets, IaC, Malware, Container scanning, EOL,... Free plan includes two users, scanning of 10 repos, 1 cloud, 2 containers & 1 domain.
   * [alienvault.com](https://www.alienvault.com/open-threat-exchange/reputation-monitor) — Uncovers compromised systems in your network
+  * [Altcha.org](https://altcha.org/anti-spam) - A Spam Filter for websites and APIs powered by natural language processing and machine learning. Free plan includes 200 requests a day per domain.
   * [atomist.com](https://atomist.com/) — A quicker and more convenient way to automate various development tasks. Now in beta.
   * [Bridgecrew](https://bridgecrew.io/) — Infrastructure as code (IaC) security powered by the open source tool - [Checkov](https://github.com/bridgecrewio/checkov). The core Bridgecrew platform is free for up to 50 IaC resources.
   * [cloudsploit.com](https://cloudsploit.com/) — Amazon Web Services (AWS) security and compliance auditing and monitoring