diff --git a/website/build.py b/website/build.py
index c204cbeb..7e87dcbd 100644
--- a/website/build.py
+++ b/website/build.py
@@ -39,6 +39,24 @@ class StarData(TypedDict):
 
 GITHUB_REPO_URL_RE = re.compile(r"^https?://github\.com/([^/]+/[^/]+?)(?:\.git)?/?$")
 
+SOURCE_TYPE_DOMAINS = {
+    "docs.python.org": "stdlib",
+    "gitlab.com": "GitLab",
+    "bitbucket.org": "Bitbucket",
+}
+
+
+def detect_source_type(url: str) -> str | None:
+    """Detect source type from URL domain. Returns None for GitHub URLs."""
+    if GITHUB_REPO_URL_RE.match(url):
+        return None
+    for domain, source_type in SOURCE_TYPE_DOMAINS.items():
+        if domain in url:
+            return source_type
+    if "github.com" not in url:
+        return "External"
+    return None
+
 
 def extract_github_repo(url: str) -> str | None:
     """Extract owner/repo from a GitHub repo URL. Returns None for non-GitHub URLs."""
@@ -57,14 +75,19 @@ def load_stars(path: Path) -> dict[str, StarData]:
 
 
 def sort_entries(entries: list[dict]) -> list[dict]:
-    """Sort entries by stars descending, then name ascending. No-star entries go last."""
+    """Sort entries by stars descending, then name ascending.
+
+    Three tiers: starred entries first, stdlib second, other non-starred last.
+    """
 
     def sort_key(entry: dict) -> tuple[int, int, str]:
         stars = entry["stars"]
         name = entry["name"].lower()
-        if stars is None:
+        if stars is not None:
+            return (0, -stars, name)
+        if entry.get("source_type") == "stdlib":
             return (1, 0, name)
-        return (0, -stars, name)
+        return (2, 0, name)
 
     return sorted(entries, key=sort_key)
 
@@ -105,6 +128,7 @@ def extract_entries(
                     "stars": None,
                     "owner": None,
                     "last_commit_at": None,
+                    "source_type": detect_source_type(url),
                     "also_see": entry["also_see"],
                 }
                 seen[url] = merged
diff --git a/website/static/style.css b/website/static/style.css
index 8f86f881..da7652f4 100644
--- a/website/static/style.css
+++ b/website/static/style.css
@@ -334,6 +334,19 @@ th[data-sort].sort-asc::after {
   text-align: right;
 }
 
+/* === Source Badges === */
+.source-badge {
+  display: inline-block;
+  font-size: 0.75rem;
+  font-weight: 600;
+  letter-spacing: 0.03em;
+  color: var(--text-muted);
+  background: var(--bg-input);
+  padding: 0.15rem 0.45rem;
+  border-radius: 3px;
+  white-space: nowrap;
+}
+
 /* === Arrow Column === */
 .col-arrow {
   width: 2.5rem;
diff --git a/website/templates/index.html b/website/templates/index.html
index 9e8b25d1..dc5fd55a 100644
--- a/website/templates/index.html
+++ b/website/templates/index.html
@@ -98,6 +98,7 @@
         </td>
         <td class="col-stars">
           {% if entry.stars is not none %}{{ "{:,}".format(entry.stars) }}{%
+          elif entry.source_type %}<span class="source-badge">{{ entry.source_type }}</span>{%
           else %}&mdash;{% endif %}
         </td>
         <td