diff --git a/README.md b/README.md
index 922c130e..423e5e17 100644
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+++ b/README.md
@@ -450,7 +450,7 @@ Table of Contents
   * [ssllabs.com](https://www.ssllabs.com/ssltest/) — Very deep analysis of the configuration of any SSL web server
   * [StackHawk](https://www.stackhawk.com/) Automate application scanning throughout your pipeline to find and fix security bugs before they hit production. Unlimited scans and environments for a single app.
   * [Sucuri SiteCheck](https://sitecheck.sucuri.net) - Free website security check and malware scanner
-  * [Protectumus](https://protectumus.com) - Free website security check, site antivirus and server firewall (WAF). Email and SMS notifications for registered users.
+  * [Protectumus](https://protectumus.com) - Free website security check, site antivirus and server firewall (WAF) for PHP. Email notifications for registered users in free tier.
   * [TestTLS.com](https://testtls.com) - Test a SSL/TLS service for secure server configuration, certificates, chains etc. Not limited to HTTPS.
   * [threatconnect.com](https://threatconnect.com) — Threat intelligence: It is designed for individual researchers, analysts and organizations who are starting to learn about cyber threat intelligence. Free up to 3 Users
   * [tinfoilsecurity.com](https://www.tinfoilsecurity.com/) — Automated vulnerability scanning. Free plan allows weekly XSS scans
@@ -646,6 +646,7 @@ Table of Contents
   * [Formspree.io](https://formspree.io/) — Send email using an HTTP POST request. Free tier limits to 50 submissions per form per month.
   * [getform.io](https://getform.io/) - Form backend platform for designers and developers, 1 form, 100 submissions, Single file upload, 100MB file storage.
   * [Kwes.io](https://kwes.io/) - Feature rich form endpoint. Works great with static sites. Free plan includes up 1 website with up to 50 submissions per month.
+  * [Qualtrics Survey](https://qualtrics.com/free-account) — Create professional forms & survey using this first class tool. 50+ expert-designed survey templates. Free Account has limit of 1 active survey, 100 responses/survey & 8 response types.
   * [smartforms.dev](https://smartforms.dev/) - Powerful and easy form backend for your website, forever free plan allows 50 submissions per month, 100MB file storage, Zapier integration, CSV/JSON export, custom redirect, custom response page, Telegram & Slack bot, single email notifications.
   * [staticforms.xyz](https://www.staticforms.xyz/) - Integrate HTML forms easily without any server side code for free. After user submits the form an email will be sent to your registered address with form content.
   * [Typeform.com](https://www.typeform.com/) — Include beautifully designed forms on websites.  Free plan allows only 10 fields per form and 100 responses per month.
@@ -697,7 +698,7 @@ Table of Contents
   * [heroku.com](https://www.heroku.com/) — Host your apps in the cloud, free for single process apps
   * [Krucible](https://usekrucible.com) — Krucible is a platform for creating Kubernetes clusters for testing and development. Free tier accounts come with 25 cluster-hours per month.
   * [ZARVIS](https://zarvis.ai) - Free managed Kubernetes namespace for open source Github project. Free 1GB memory and 1 vCPU.
-  * [mendix.com](https://www.mendix.com/) — Rapid Application Development for Enterprises, unlimited number of free sandbox environments supporting 10 users, 100 MB of files and 100 MB database storage each
+  * [Mendix](https://www.mendix.com/) — Rapid Application Development for Enterprises, unlimited number of free sandbox environments supporting unlimited users, 0.5 GB storage and 1 GB RAM per app. Also Studio and Studio Pro IDEs are allowed in free tier.
   * [m3o.com](https://m3o.com) - A cloud platform for API services development. M3O is a fully managed Micro as a Service offering focusing on Go microservices development in the Cloud. Free tier provides enough to run 5 services and collaborate with others.
   * [Okteto Cloud](https://okteto.com) - Managed Kubernetes service designed for remote development. Free developer accounts come with 8GB of RAM, 4 CPUs and 5GB Disk space. The apps sleep after 24 hours of inactivity.
   * [opeNode](https://openode.io) — Free Node.js hosting for Open Source projects. 100 GB Bandwidth/month with 100 MB memory & 1000 MB storage. Deploy using CLI or existing Git repository.