diff --git a/altaAudit.py b/altaAudit.py
new file mode 100644
index 0000000..89c2db2
--- /dev/null
+++ b/altaAudit.py
@@ -0,0 +1,66 @@
+################## Asmbly Neon API Integrations ###################
+#      Neon API docs - https://developer.neoncrm.com/api-v2/     #
+#################################################################
+
+import openPathUtil
+import neonUtil
+import logging
+import argparse
+
+
+def getParserArgs():
+    parser = argparse.ArgumentParser(
+        prog='Alta User Audit',
+        description='Help find users who have an entry in the Alta database, but are not supported by an entry in Neon.',
+    )
+    parser.add_argument('-v', '--verbose', action='store_true')
+    args = parser.parse_args()
+    return args
+
+
+def getLogger(verbose=True):
+    logLevel = logging.DEBUG if verbose else logging.INFO
+    logging.basicConfig(
+        format='%(asctime)s %(levelname)-8s %(message)s',
+        level=logLevel,
+        datefmt='%Y-%m-%d %H:%M:%S')
+    return logging.getLogger(__name__)
+
+
+def main():
+    args = getParserArgs()
+    log = getLogger(args.verbose)
+
+    # Get the list of users from the Alta database
+    altaUsers = openPathUtil.getAllUsersMock()
+    neonUsers = neonUtil.getRealAccountsMock()
+
+    # Find all users in Alta who _are not_ in Neon
+    extraAltaUsers = []
+    for uid, user in altaUsers.items():
+        match = False
+        log.debug(f'Checking for Alta user {uid}')
+        for nuid, neonUser in neonUsers.items():
+            log.debug(f'Comparing Alta user {uid} to Neon user {nuid}')
+            opid = neonUser.get('OpenPathID')
+            log.debug(f'Neon user {nuid} has OpenPathID {opid}')
+            if opid and int(uid) == int(opid):
+                match = True
+                log.debug(f'Alta user {uid} is Neon user {neonUser.get("fullName")} ({nuid})')
+                continue
+            else:
+                log.debug('No match')
+        if not match:
+            log.debug('No match found for {uid}')
+            extraAltaUsers.append(uid)
+
+    if len(extraAltaUsers) == 0:
+        log.info('All users in Alta are supported by a Neon entry')
+    else:
+        log.info('The following Alta users are not found in Neon:')
+        for uid in extraAltaUsers:
+            log.info(f'{uid}: {altaUsers[uid]}')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/neonUtil.py b/neonUtil.py
index 5ca46fa..e4fb410 100644
--- a/neonUtil.py
+++ b/neonUtil.py
@@ -482,6 +482,23 @@ def getRealAccounts():
     return neonAccountDict
 
 
+####################################################################
+# MOCK: Get all staf and current/past members from Neon, incuding detailed subscription info
+####################################################################
+def getRealAccountsMock():
+    return {
+        '12af34e5': { # What does this value look like? Int/hex/string?
+            'OpenPathID': '4321',
+            'validMembership': True,
+            'fullName': 'Cam Herringshaw',
+        },
+        '12a34': {
+            'OpenPathID': '1234',
+            'fullName': 'Test User',
+        },
+    }
+
+
 ####################################################################
 # Helper function: is this Neon account marked with any type
 ####################################################################
diff --git a/openPathUtil.py b/openPathUtil.py
index c9c366b..cb268cb 100644
--- a/openPathUtil.py
+++ b/openPathUtil.py
@@ -97,6 +97,20 @@ def getAllUsers():
     return opUsers
 
 
+####################################################################
+# MOCK: Return a fake list of users
+####################################################################
+def getAllUsersMock():
+    return {
+        4321: {
+            'id': 4321,
+        },
+        12345: {
+            'id': 12345,
+        },
+    }
+
+
 ####################################################################
 # Get a single OpenPath user by OpenPath ID
 ####################################################################