diff --git a/styles-vale/OutSystems/AmericanSpelling.yml b/styles-vale/OutSystems/AmericanSpelling.yml
new file mode 100644
index 0000000..e1d60fc
--- /dev/null
+++ b/styles-vale/OutSystems/AmericanSpelling.yml
@@ -0,0 +1,15 @@
+extends: substitution
+message: Use the American spelling '%s' instead of '%s'.
+level: error
+ignorecase: true
+swap:
+  colour: color
+  behaviour: behavior
+  analise: analyze
+  analised: analyzed
+  analising: analyzing
+  centre: center
+  travelling: traveling
+  organise: organize
+  organizing: organizing
+  fortnight: two weeks
diff --git a/styles-vale/OutSystems/BrandName.yml b/styles-vale/OutSystems/BrandName.yml
new file mode 100644
index 0000000..5b1c685
--- /dev/null
+++ b/styles-vale/OutSystems/BrandName.yml
@@ -0,0 +1,8 @@
+extends: existence
+message: Do not write '%s'
+scope: sentence
+level: warning
+code: false
+ignorecase: false
+raw:
+  - "(?:OutSystems'|OutSystems Platform)"
diff --git a/styles-vale/OutSystems/SentenceComplexity.yml b/styles-vale/OutSystems/SentenceComplexity.yml
new file mode 100644
index 0000000..ba74ddb
--- /dev/null
+++ b/styles-vale/OutSystems/SentenceComplexity.yml
@@ -0,0 +1,7 @@
+extends: readability
+message: "Readability score (grade level %s) might be too high."
+level: suggestion
+grade: 13
+metrics:
+  - Flesch-Kincaid
+#  - Gunning Fog
diff --git a/styles-vale/OutSystems/SentenceLength.yml b/styles-vale/OutSystems/SentenceLength.yml
new file mode 100644
index 0000000..c9754c6
--- /dev/null
+++ b/styles-vale/OutSystems/SentenceLength.yml
@@ -0,0 +1,7 @@
+# Based on OpenStack.SentenceLength
+message: "Write short sentences (less than 40 words)."
+extends: occurrence
+scope: sentence
+level: suggestion
+max: 40
+token: \b(\w+)\b