diff --git a/business_rules/operators.py b/business_rules/operators.py
index d43e5b1f..f965bb1e 100644
--- a/business_rules/operators.py
+++ b/business_rules/operators.py
@@ -87,6 +87,10 @@ def ends_with(self, other_string):
     def contains(self, other_string):
         return other_string in self.value
 
+    @type_operator(FIELD_TEXT, label="Contains (case insensitive)")
+    def contains_case_insensitive(self, other_string):
+        return other_string.lower() in self.value.lower()
+
     @type_operator(FIELD_TEXT)
     def matches_regex(self, regex):
         return re.search(regex, self.value)
@@ -95,6 +99,10 @@ def matches_regex(self, regex):
     def non_empty(self):
         return bool(self.value)
 
+    @type_operator(FIELD_NO_INPUT)
+    def is_empty(self):
+        return self.value is None or self.value.strip() == ""
+
 
 @export_type
 class NumericType(BaseType):
@@ -119,6 +127,10 @@ def _assert_valid_value_and_cast(value):
     def equal_to(self, other_numeric):
         return abs(self.value - other_numeric) <= self.EPSILON
 
+    @type_operator(FIELD_NUMERIC)
+    def not_equal_to(self, other_numeric):
+        return abs(self.value - other_numeric) > self.EPSILON
+
     @type_operator(FIELD_NUMERIC)
     def greater_than(self, other_numeric):
         return (self.value - other_numeric) > self.EPSILON