diff --git a/backend/automation/db/__init__.py b/backend/automation/db/__init__.py
index b54adf5..7f614b9 100644
--- a/backend/automation/db/__init__.py
+++ b/backend/automation/db/__init__.py
@@ -33,6 +33,7 @@
     Column("no_differing", Integer),
     Column("date", DateTime),
     Column("comparison_status", Enum(ComparisonStatus)),
+    Column("note", String),
     # Column for distinguishing between ResultCommit and ResultVersion
     Column("type", String(20)),
     # ResultCommit specific columns
@@ -182,6 +183,13 @@ def _result_fun_list_to_dict(self, result: ResultSubType | None) -> None:
             if hasattr(result, "_functions_list"):
                 delattr(result, "_functions_list")
 
+    def update(self, result: ResultSubType) -> None:
+        """Update a function result in the database."""
+        with Session() as session:
+            # Merge the detached object back into the session
+            session.merge(result)
+            session.commit()
+
 
 class FunctionResultsRepo:
     """Repository for working with function results in DB."""
diff --git a/backend/automation/models/results/commits.py b/backend/automation/models/results/commits.py
index d2dc194..712a42f 100644
--- a/backend/automation/models/results/commits.py
+++ b/backend/automation/models/results/commits.py
@@ -35,6 +35,7 @@ def __init__(
         date: Optional[datetime] = None,
         functions: Optional[Dict[str, FunctionResult]] = None,
         comparison_status: ComparisonStatus = ComparisonStatus.SUCCESS,
+        note: str = "",
     ):
         """
         :param commit: For which commit are the results.
@@ -56,6 +57,7 @@ def __init__(
             date=date,
             functions=functions,
             comparison_status=comparison_status,
+            note=note,
         )
 
     @classmethod
diff --git a/backend/automation/models/results/result.py b/backend/automation/models/results/result.py
index 0421379..40bc7e0 100644
--- a/backend/automation/models/results/result.py
+++ b/backend/automation/models/results/result.py
@@ -41,6 +41,7 @@ def __init__(
         date: Optional[datetime] = None,
         functions: Optional[Dict[str, FunctionResult]] = None,
         comparison_status: ComparisonStatus = ComparisonStatus.SUCCESS,
+        note: str = "",
     ) -> None:
         """
         :param name: Name of project (used primary for showing to user).
@@ -66,6 +67,7 @@ def __init__(
         self.non_equal = non_equal
         self.unknown = unknown
         self.date = date if date else datetime.now()
+        self.note = note
 
         self.functions = functions if functions is not None else {}
         self.comparison_status = comparison_status
diff --git a/backend/automation/models/results/versions.py b/backend/automation/models/results/versions.py
index b744e55..b4998b5 100644
--- a/backend/automation/models/results/versions.py
+++ b/backend/automation/models/results/versions.py
@@ -40,6 +40,7 @@ def __init__(
         date: Optional[datetime] = None,
         functions: Optional[Dict[str, FunctionResult]] = None,
         comparison_status: ComparisonStatus = ComparisonStatus.SUCCESS,
+        note: str = "",
     ) -> None:
         """
         :param old_tag: Old tag of the project, that was compared.
@@ -61,6 +62,7 @@ def __init__(
             date=date,
             functions=functions,
             comparison_status=comparison_status,
+            note=note,
         )
 
     @classmethod
diff --git a/backend/automation/web/api.py b/backend/automation/web/api.py
index b907ccc..92f2ff3 100644
--- a/backend/automation/web/api.py
+++ b/backend/automation/web/api.py
@@ -1,16 +1,30 @@
 """File defining HTML REST API endpoints."""
+from functools import wraps
+from typing import Any, Callable
+
 from flask import Blueprint, Response, abort, request, session
 
-from automation.db import FunctionResultsRepo
+from automation.db import FunctionResultsRepo, ResultsRepo
 from automation.models.results.types import ExpectedResultType
 
 api_bp = Blueprint("api_bp", __name__, url_prefix="/api")
 
 
+def login_required(f: Callable[..., Response]) -> Callable[..., Response]:
+    """Decorator to require user to be logged in."""
+    @wraps(f)
+    def decorated_function(*args: Any, **kwargs: Any) -> Response:
+        if "user" not in session:
+            abort(403)
+        return f(*args, **kwargs)
+    return decorated_function
+
+
 @api_bp.put(
     "/commits/<config_name>/<commit>/<diffkemp_sha>"
     "/functions/<function_name>/expected-result"
 )
+@login_required
 def update_fun_expected_res_for_commit(
     config_name: str,
     commit: str,
@@ -18,10 +32,6 @@ def update_fun_expected_res_for_commit(
     function_name: str,
 ) -> Response:
     """Update the expected result for a function."""
-    # Check if user is logged in
-    if "user" not in session:
-        abort(403)
-
     repo = FunctionResultsRepo()
     function_result = repo.getForCommit(
         config_name=config_name,
@@ -45,6 +55,7 @@ def update_fun_expected_res_for_commit(
     "/versions/<config_name>/<old_tag>/<new_tag>/<diffkemp_sha>"
     "/functions/<function_name>/expected-result"
 )
+@login_required
 def update_fun_expected_res_for_version(
     config_name: str,
     old_tag: str,
@@ -53,10 +64,6 @@ def update_fun_expected_res_for_version(
     function_name: str,
 ) -> Response:
     """Update the expected result for a function."""
-    # Check if user is logged in
-    if "user" not in session:
-        abort(403)
-
     repo = FunctionResultsRepo()
     function_result = repo.getForVersion(
         config_name=config_name,
@@ -75,3 +82,62 @@ def update_fun_expected_res_for_version(
 
     repo.update(function_result)
     return Response(status=200)
+
+
+@api_bp.put(
+    "/commits/<config_name>/<commit>/<diffkemp_sha>"
+    "/note"
+)
+@login_required
+def update_res_note_for_commit(
+    config_name: str,
+    commit: str,
+    diffkemp_sha: str,
+) -> Response:
+    """Update the result note for a commit result."""
+    repo = ResultsRepo()
+    results = repo.get_commits(
+        config_file_name=config_name,
+        commit=commit,
+        diffkemp_sha=diffkemp_sha,
+    )
+
+    if not results:
+        abort(404)
+
+    result = results[0]
+    note = request.json["note"]
+
+    result.note = note
+    repo.update(result)
+    return Response(status=200)
+
+
+@api_bp.put(
+    "/versions/<config_name>/<old_tag>/<new_tag>/<diffkemp_sha>"
+    "/note"
+)
+def update_res_note_for_version(
+    config_name: str,
+    old_tag: str,
+    new_tag: str,
+    diffkemp_sha: str,
+) -> Response:
+    """Update the result note for version result."""
+    repo = ResultsRepo()
+    results = repo.get_versions(
+        config_file_name=config_name,
+        old_tag=old_tag,
+        new_tag=new_tag,
+        diffkemp_sha=diffkemp_sha,
+    )
+
+    if not results:
+        abort(404)
+
+    result = results[0]
+    note = request.json["note"]
+
+    result.note = note
+    repo.update(result)
+    return Response(status=200)
diff --git a/backend/automation/web/dtos/results/commits.py b/backend/automation/web/dtos/results/commits.py
index ceb9435..0f4b3c9 100644
--- a/backend/automation/web/dtos/results/commits.py
+++ b/backend/automation/web/dtos/results/commits.py
@@ -74,6 +74,7 @@ class ResultDTO:
     differences_url: Optional[str]
     viewer_url: Optional[str]
     commit_info_url: str
+    note: str
 
     @classmethod
     def create(
@@ -129,6 +130,7 @@ def create(
             differences_url=differences_url,
             viewer_url=viewer_url,
             commit_info_url=commit_info_url,
+            note=result.note,
         )
 
     def get_function_bg_class(self, function_name: str) -> str:
diff --git a/backend/automation/web/dtos/results/versions.py b/backend/automation/web/dtos/results/versions.py
index d940ec3..eac873b 100644
--- a/backend/automation/web/dtos/results/versions.py
+++ b/backend/automation/web/dtos/results/versions.py
@@ -44,6 +44,7 @@ class ResultDTO:
     result_url: str
     differences_url: Optional[str]
     viewer_url: Optional[str]
+    note: str
 
     @classmethod
     def create(
@@ -101,6 +102,7 @@ def create(
             result_url=result_url,
             differences_url=differences_url,
             viewer_url=viewer_url,
+            note=result.note,
         )
 
     def get_function_bg_class(self, function_name: str) -> str:
diff --git a/backend/automation/web/templates/commits/result.html b/backend/automation/web/templates/commits/result.html
index d7a27d6..0f92fbe 100644
--- a/backend/automation/web/templates/commits/result.html
+++ b/backend/automation/web/templates/commits/result.html
@@ -1,5 +1,5 @@
 {% extends "commits/layout.html" %}
-{% from "macros.html" import expected_fun_result_select %}
+{% from "macros.html" import expected_fun_result_select, result_note_text_area %}
 
 {% block subcontent %}
 <h2>Results</h2>
@@ -11,6 +11,17 @@ <h2>Results</h2>
   <li><b>Commit summary</b>: {{ result.commit.summary }}</li>
 </ul>
 
+{{ result_note_text_area(
+     result.note,
+     url_for(
+       'api_bp.update_res_note_for_commit',
+       config_name=result.config_name,
+       commit=result.commit.SHA,
+       diffkemp_sha=result.diffkemp_sha,
+     )
+   )
+}}
+
 <h3>Compared functions</h3>
 
 <table class="table">
diff --git a/backend/automation/web/templates/layout.html b/backend/automation/web/templates/layout.html
index 7460984..acc17ff 100644
--- a/backend/automation/web/templates/layout.html
+++ b/backend/automation/web/templates/layout.html
@@ -112,7 +112,6 @@
         // to the one set before it was changed by the user.
         // This is just in case error occurs in the backend.
         const currentExpected = selectElement.dataset.currentExpected;
-        console.log(currentExpected);
         fetch(url, {
           method: "PUT",
           headers: {
@@ -126,7 +125,6 @@
           // Success, update the current expected result
           selectElement.dataset.currentExpected = expectedResult;
         }).catch(() => {
-          console.log("here");
           alert(
             "Error occurred while changing the expected result for function " +
             `'${selectElement.dataset.function}' from '${currentExpected}' to ` +
@@ -137,6 +135,42 @@
           selectElement.value = currentExpected;
         });
       }
+
+      function updateNoteForResult() {
+        const noteTextArea = document.getElementById('result-note');
+        const nextNote = noteTextArea.value;
+        const url = noteTextArea.dataset.apiUrl;
+        const currentNote = noteTextArea.dataset.currentNote;
+        fetch(url, {
+          method: "PUT",
+          headers: {
+            "Content-Type": "application/json",
+          },
+          body: JSON.stringify({ "note": nextNote})
+        }).then((response) => {
+          if (!response.ok) {
+            throw new Error('Something went wrong');
+          }
+          // Success, update the current note
+          noteTextArea.dataset.currentNote = nextNote;
+        }).catch(() => {
+          alert(
+            "Error occurred while updating note for the result.\n" +
+            "Please try it again."
+          );
+        });
+      }
+
+      window.addEventListener('beforeunload', (e) => {
+        const noteTextArea = document.getElementById('result-note');
+        if (noteTextArea) {
+          const hasUnsavedNote = (noteTextArea.value !== noteTextArea.dataset.currentNote);
+          if (hasUnsavedNote) {
+            e.preventDefault();
+            e.returnValue = "";
+          }
+        }
+      });
     </script>
 
     {% block scripts %}{% endblock %}
diff --git a/backend/automation/web/templates/macros.html b/backend/automation/web/templates/macros.html
index a561339..3e75947 100644
--- a/backend/automation/web/templates/macros.html
+++ b/backend/automation/web/templates/macros.html
@@ -25,3 +25,19 @@
   {% endif %}
 </div>
 {% endmacro %}
+
+{% macro result_note_text_area(note, api_url) %}
+<div>
+  <b>Note:</b>
+  <textarea class="form-control" {{ 'disabled' if 'user' not in session else ''}}
+            id="result-note"
+            data-api-url="{{ api_url }}"
+            data-current-note="{{ note }}"
+            rows="3"
+  >{{ note }}</textarea>
+  <button class="mt-1 btn btn-outline-primary {{ 'disabled' if 'user' not in session else ''}}"
+          onclick="updateNoteForResult()">
+    Update
+  </button>
+</div>
+{% endmacro %}
diff --git a/backend/automation/web/templates/versions/result.html b/backend/automation/web/templates/versions/result.html
index 4d7bcf3..4b17443 100644
--- a/backend/automation/web/templates/versions/result.html
+++ b/backend/automation/web/templates/versions/result.html
@@ -1,5 +1,5 @@
 {% extends "versions/layout.html" %}
-{% from "macros.html" import expected_fun_result_select %}
+{% from "macros.html" import expected_fun_result_select, result_note_text_area %}
 
 {% block subcontent %}
 
@@ -11,6 +11,18 @@ <h2>Results</h2>
   <li><b>New tag</b>: {{ result.new_tag }}</li>
 </ul>
 
+{{ result_note_text_area(
+     result.note,
+     url_for(
+       'api_bp.update_res_note_for_version',
+       config_name=result.config_name,
+       old_tag=result.old_tag,
+       new_tag=result.new_tag,
+       diffkemp_sha=result.diffkemp_sha,
+     )
+   )
+}}
+
 <h3>Compared functions</h3>
 
 <table class="table">