diff --git a/packagedb/models.py b/packagedb/models.py
index a774592e..3cb59cac 100644
--- a/packagedb/models.py
+++ b/packagedb/models.py
@@ -26,6 +26,7 @@
 from django.utils.translation import gettext_lazy as _
 
 import natsort
+from univers.version_range import RANGE_CLASS_BY_SCHEMES
 from aboutcode.federatedcode.contrib.django.models import (
     FederatedCodePackageActivityMixin,
 )
@@ -46,9 +47,36 @@
 logger.setLevel(logging.INFO)
 
 
-def sort_version(packages):
-    """Return the packages sorted by version."""
-    return natsort.natsorted(packages, key=lambda p: p.version.replace(".", "~") + "z")
+def sort_version(packages, package_type=None):
+    """Return the packages sorted by version using proper version scheme."""
+    if not packages:
+        return []
+
+    # Get the first package to determine the type
+    try:
+        sample_package = packages[0]
+    except TypeError:
+        # Fallback for generators
+        packages = list(packages)
+        if not packages:
+            return []
+        sample_package = packages[0]
+
+    pkg_type = package_type or sample_package.type
+
+    # Get the appropriate version class for this package type
+    range_class = RANGE_CLASS_BY_SCHEMES.get(pkg_type)
+    if range_class:
+        version_class = range_class.version_class
+        try:
+            return sorted(packages, key=lambda p: version_class(p.version))
+        except Exception as e:
+            logger.warning(
+                f"Version parsing failed for {package_type}, using natsort fallback: {e}"
+            )
+
+    # Fallback to natural sorting
+    return natsort.natsorted(packages, key=lambda p: p.version)
 
 
 class PackageQuerySet(PackageURLQuerySetMixin, models.QuerySet):
diff --git a/packagedb/tests/test_models.py b/packagedb/tests/test_models.py
index 9d77f9b9..56e54d88 100644
--- a/packagedb/tests/test_models.py
+++ b/packagedb/tests/test_models.py
@@ -20,6 +20,7 @@
 from packagedb.models import PackageWatch
 from packagedb.models import Party
 from packagedb.models import Resource
+from packagedb.models import sort_version
 
 
 class ResourceModelTestCase(TransactionTestCase):
@@ -494,3 +495,125 @@ def test_get_or_none(self):
         package = Package.objects.filter(download_url="http://a.ab").get_or_none()
         assert package
         assert Package.objects.filter(download_url="http://a.ab-foobar").get_or_none() is None
+
+
+class SortVersionTestCase(TransactionTestCase):
+    """Comprehensive tests for the sort_version function."""
+
+    def tearDown(self):
+        Package.objects.all().delete()
+
+    def _create_packages(self, pkg_type, versions, **kwargs):
+        """Create packages with given versions."""
+        return [
+            Package.objects.create(
+                download_url=f"http://{pkg_type}-{hash(version)}.com",
+                type=pkg_type,
+                version=version,
+                **kwargs,
+            )
+            for version in versions
+        ]
+
+    def test_sort_version_empty_list(self):
+        """Test sorting an empty list."""
+        self.assertEqual([], sort_version([]))
+
+    def test_ecosystem_versions(self):
+        """Test version sorting across multiple package ecosystems."""
+        test_cases = [
+            (
+                "npm",
+                ["1.10.0", "2.0.0", "1.0.0", "1.2.0"],
+                ["1.0.0", "1.2.0", "1.10.0", "2.0.0"],
+                {"name": "lodash"},
+            ),
+            (
+                "pypi",
+                ["1.0.1", "1.0rc1", "1.0", "1.0a1", "1.0b1"],
+                ["1.0a1", "1.0b1", "1.0rc1", "1.0", "1.0.1"],
+                {"name": "django"},
+            ),
+            (
+                "maven",
+                ["4.10", "4.0", "4.2"],
+                ["4.0", "4.2", "4.10"],
+                {"namespace": "junit", "name": "junit"},
+            ),
+            (
+                "swift",
+                ["2.0.0", "1.1.5", "1.0.0", "1.1.5^{}"],
+                ["1.0.0", "1.1.5", "1.1.5^{}", "2.0.0"],
+                {"name": "alamofire"},
+            ),
+            ("gem", ["4.0.0", "3.0.0", "3.2.0"], ["3.0.0", "3.2.0", "4.0.0"], {"name": "rails"}),
+            (
+                "deb",
+                ["1.0-10", "1.0-1", "1.0-2"],
+                ["1.0-1", "1.0-2", "1.0-10"],
+                {"name": "deb-pkg"},
+            ),
+            (
+                "nuget",
+                ["11.0.0", "10.0.0", "9.0.0"],
+                ["9.0.0", "10.0.0", "11.0.0"],
+                {"name": "Newtonsoft.Json"},
+            ),
+            ("generic", ["1.10", "1.0", "1.2"], ["1.0", "1.2", "1.10"], {"name": "gen-pkg"}),
+            (
+                "cargo",
+                ["1.0.100", "1.0.0", "1.0.20"],
+                ["1.0.0", "1.0.20", "1.0.100"],
+                {"name": "serde"},
+            ),
+            (
+                "composer",
+                ["4.0.0", "3.0.0", "3.1.0"],
+                ["3.0.0", "3.1.0", "4.0.0"],
+                {"name": "sf-console"},
+            ),
+            (
+                "golang",
+                ["v0.9.1", "v0.8.0", "v0.9.0"],
+                ["v0.8.0", "v0.9.0", "v0.9.1"],
+                {"namespace": "github.com/pkg", "name": "errors"},
+            ),
+            (
+                "rpm",
+                ["3.10.0-10", "3.10.0-1", "3.10.0-2"],
+                ["3.10.0-1", "3.10.0-2", "3.10.0-10"],
+                {"name": "kernel"},
+            ),
+            ("unknown-type", ["1.10", "1.0", "1.2"], ["1.0", "1.2", "1.10"], {"name": "unk-pkg"}),
+            (
+                "npm",
+                ["invalid-10", "invalid-1", "invalid-2"],
+                ["invalid-1", "invalid-2", "invalid-10"],
+                {"name": "inv-test"},
+            ),
+        ]
+
+        for pkg_type, unsorted, expected, kwargs in test_cases:
+            with self.subTest(pkg_type=pkg_type):
+                packages = self._create_packages(pkg_type, unsorted, **kwargs)
+                sorted_versions = [p.version for p in sort_version(packages)]
+                self.assertEqual(expected, sorted_versions, f"Failed for {pkg_type}")
+
+    def test_sort_version_generator_input(self):
+        """Test with generator input."""
+        packages = self._create_packages("npm", ["1.10.0", "1.0.0", "1.5.0"], name="gen-pkg")
+        gen = (p for p in packages)
+        sorted_packages = sort_version(gen)
+        self.assertEqual(3, len(sorted_packages))
+
+    def test_sort_version_explicit_type(self):
+        """Test with explicit package_type parameter."""
+        packages = self._create_packages("npm", ["1.10.0", "1.2.0", "1.0.0"], name="exp-pkg")
+        sorted_packages = sort_version(packages, package_type="npm")
+        self.assertEqual("1.0.0", sorted_packages[0].version)
+
+    def test_get_latest_version_integration(self):
+        """Test get_latest_version uses sort_version correctly."""
+        packages = self._create_packages("npm", ["1.0.0", "1.10.0", "1.2.0"], name="test-pkg")
+        latest = packages[0].get_latest_version()
+        self.assertEqual("1.10.0", latest.version)
diff --git a/packagedb/tests/test_sort_version_integration.py b/packagedb/tests/test_sort_version_integration.py
new file mode 100644
index 00000000..dec9d2bb
--- /dev/null
+++ b/packagedb/tests/test_sort_version_integration.py
@@ -0,0 +1,133 @@
+#
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# purldb is a trademark of nexB Inc.
+# SPDX-License-Identifier: Apache-2.0
+# See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+# See https://github.com/aboutcode-org/purldb for support or download.
+# See https://aboutcode.org for more information about nexB OSS projects.
+#
+
+from django.test import TransactionTestCase
+
+from packagedb.models import Package
+from packagedb.models import sort_version
+
+
+class SortVersionIntegrationTestCase(TransactionTestCase):
+    """Integration tests for sort_version with real-world PURL data."""
+
+    def tearDown(self):
+        Package.objects.all().delete()
+
+    def _test_ecosystem_sorting(self, pkg_type, versions_unordered, expected_ordered, **kwargs):
+        """Test version sorting for any ecosystem."""
+        packages = [
+            Package.objects.create(
+                download_url=f"http://{pkg_type}-{hash(version)}.com",
+                type=pkg_type,
+                version=version,
+                **kwargs,
+            )
+            for version in versions_unordered
+        ]
+        sorted_versions = [p.version for p in sort_version(packages)]
+        self.assertEqual(expected_ordered, sorted_versions)
+
+    def test_ecosystem_versions(self):
+        """Test version sorting for multiple real-world ecosystems."""
+        test_cases = [
+            (
+                "npm",
+                ["4.17.21", "4.17.20", "4.17.10", "4.17.4", "4.16.6", "4.0.0", "3.10.1", "1.3.1"],
+                ["1.3.1", "3.10.1", "4.0.0", "4.16.6", "4.17.4", "4.17.10", "4.17.20", "4.17.21"],
+                {"name": "lodash"},
+            ),
+            (
+                "pypi",
+                ["4.1", "4.1rc1", "4.1b1", "4.1a1", "4.0.8", "4.0", "3.2.16", "2.1.15"],
+                ["2.1.15", "3.2.16", "4.0", "4.0.8", "4.1a1", "4.1b1", "4.1rc1", "4.1"],
+                {"name": "django"},
+            ),
+            (
+                "maven",
+                ["4.13.2", "4.13", "4.10", "4.8.2", "4.5", "3.8.2", "3.8.1"],
+                ["3.8.1", "3.8.2", "4.5", "4.8.2", "4.10", "4.13", "4.13.2"],
+                {"namespace": "junit", "name": "junit"},
+            ),
+            (
+                "gem",
+                ["7.0.4", "7.0.3.1", "6.1.6.1", "6.0.6", "5.2.8.1", "5.2.0"],
+                ["5.2.0", "5.2.8.1", "6.0.6", "6.1.6.1", "7.0.3.1", "7.0.4"],
+                {"name": "rails"},
+            ),
+            (
+                "nuget",
+                ["13.0.1", "12.0.3", "10.0.3", "9.0.1", "8.0.3", "6.0.8"],
+                ["6.0.8", "8.0.3", "9.0.1", "10.0.3", "12.0.3", "13.0.1"],
+                {"name": "Newtonsoft.Json"},
+            ),
+            (
+                "cargo",
+                ["1.0.147", "1.0.100", "1.0.10", "1.0.0", "0.9.15", "0.9.0"],
+                ["0.9.0", "0.9.15", "1.0.0", "1.0.10", "1.0.100", "1.0.147"],
+                {"name": "serde"},
+            ),
+            (
+                "deb",
+                ["2.31-13+deb11u5", "2.31-13", "2.28-10", "2.27-3ubuntu1", "2.24-11+deb9u4"],
+                ["2.24-11+deb9u4", "2.27-3ubuntu1", "2.28-10", "2.31-13", "2.31-13+deb11u5"],
+                {"name": "libc6"},
+            ),
+            (
+                "golang",
+                ["v1.8.1", "v1.7.0", "v1.5.0", "v1.2.0", "v1.0.0", "v0.9.0"],
+                ["v0.9.0", "v1.0.0", "v1.2.0", "v1.5.0", "v1.7.0", "v1.8.1"],
+                {"namespace": "github.com/pkg", "name": "errors"},
+            ),
+        ]
+        for pkg_type, unsorted, expected, kwargs in test_cases:
+            with self.subTest(pkg_type=pkg_type):
+                self._test_ecosystem_sorting(pkg_type, unsorted, expected, **kwargs)
+
+    def test_swift_with_git_tag_suffix(self):
+        """
+        Test Swift packages with Git tag suffixes (issue #808).
+
+        Swift is unsupported by univers, so uses natsort fallback.
+        Versions with ^{} suffix should come after their base versions.
+        """
+        versions = ["5.6.4", "5.6.4^{}", "5.4.4", "5.4.4^{}", "5.2.2", "5.2.2^{}", "4.8.2"]
+        packages = [
+            Package.objects.create(
+                download_url=f"http://swift-{i}.com",
+                type="swift",
+                name="Alamofire",
+                version=version,
+            )
+            for i, version in enumerate(versions)
+        ]
+        sorted_versions = [p.version for p in sort_version(packages)]
+
+        # Base versions should come before their ^{} suffixed versions
+        self.assertLess(sorted_versions.index("5.2.2"), sorted_versions.index("5.2.2^{}"))
+        self.assertLess(sorted_versions.index("5.4.4"), sorted_versions.index("5.4.4^{}"))
+
+    def test_cross_ecosystem_latest_version(self):
+        """Test get_latest_version across different ecosystems."""
+        # npm
+        npm_pkgs = [
+            Package.objects.create(
+                download_url=f"http://npm-{i}.com", type="npm", name="test", version=v
+            )
+            for i, v in enumerate(["1.0.0", "1.10.0", "1.2.0"])
+        ]
+        self.assertEqual(npm_pkgs[1], npm_pkgs[0].get_latest_version())
+
+        # pypi
+        pypi_pkgs = [
+            Package.objects.create(
+                download_url=f"http://pypi-{i}.com", type="pypi", name="pkg", version=v
+            )
+            for i, v in enumerate(["2.0", "2.0.1", "2.0a1"])
+        ]
+        self.assertEqual(pypi_pkgs[1], pypi_pkgs[0].get_latest_version())