diff --git a/cmd/helpers.go b/cmd/helpers.go
index dfe77c6..6898b1a 100644
--- a/cmd/helpers.go
+++ b/cmd/helpers.go
@@ -220,12 +220,12 @@ func formatFieldCounts(fieldCounts map[string]int) string {
 		return "-"
 	}
 
-	// Sort field names for consistent output
+	// Sort field names for consistent output (case-insensitive)
 	fields := make([]string, 0, len(fieldCounts))
 	for field := range fieldCounts {
 		fields = append(fields, field)
 	}
-	sort.Strings(fields)
+	sort.Slice(fields, func(i, j int) bool { return lessFold(fields[i], fields[j]) })
 
 	// Build formatted string
 	parts := make([]string, 0, len(fields))
diff --git a/cmd/list.go b/cmd/list.go
index 3671306..b56775b 100644
--- a/cmd/list.go
+++ b/cmd/list.go
@@ -159,9 +159,9 @@ func runList(cmd *cobra.Command, args []string) error {
 	}
 
 	// Standard list mode (existing behavior)
-	// Sort by service name
+	// Sort by service name (case-insensitive)
 	sort.Slice(metadata, func(i, j int) bool {
-		return metadata[i].Service < metadata[j].Service
+		return lessFold(metadata[i].Service, metadata[j].Service)
 	})
 
 	// Output in requested format
@@ -382,7 +382,7 @@ func groupCredentialsByProject(metadata []vault.CredentialMetadata) map[string][
 		for cred := range credSet {
 			creds = append(creds, cred)
 		}
-		sort.Strings(creds)
+		sort.Slice(creds, func(i, j int) bool { return lessFold(creds[i], creds[j]) })
 		result[project] = creds
 	}
 
@@ -415,7 +415,7 @@ func outputByProjectTable(projects map[string][]string) error {
 	for project := range projects {
 		projectNames = append(projectNames, project)
 	}
-	sort.Strings(projectNames)
+	sort.Slice(projectNames, func(i, j int) bool { return lessFold(projectNames[i], projectNames[j]) })
 
 	// Display each project group
 	for _, project := range projectNames {
@@ -469,7 +469,7 @@ func outputByProjectSimple(projects map[string][]string) error {
 	for project := range projects {
 		projectNames = append(projectNames, project)
 	}
-	sort.Strings(projectNames)
+	sort.Slice(projectNames, func(i, j int) bool { return lessFold(projectNames[i], projectNames[j]) })
 
 	// Output each project on one line
 	for _, project := range projectNames {
@@ -479,3 +479,14 @@ func outputByProjectSimple(projects map[string][]string) error {
 
 	return nil
 }
+
+// lessFold reports whether a should sort before b, compared case-insensitively.
+// It falls back to a case-sensitive comparison as a tie-break so that strings
+// differing only in case keep a stable, deterministic order.
+func lessFold(a, b string) bool {
+	la, lb := strings.ToLower(a), strings.ToLower(b)
+	if la != lb {
+		return la < lb
+	}
+	return a < b
+}
diff --git a/cmd/tui/components/detail.go b/cmd/tui/components/detail.go
index fcd5467..3b2418c 100644
--- a/cmd/tui/components/detail.go
+++ b/cmd/tui/components/detail.go
@@ -562,8 +562,8 @@ func FormatUsageLocations(cred *vault.Credential) string {
 			for field, count := range record.FieldAccess {
 				fieldParts = append(fieldParts, fmt.Sprintf("%s:%d", field, count))
 			}
-			// Sort field names for consistent display
-			sort.Strings(fieldParts)
+			// Sort field names for consistent display (case-insensitive)
+			sort.Slice(fieldParts, func(i, j int) bool { return lessFold(fieldParts[i], fieldParts[j]) })
 			b.WriteString(strings.Join(fieldParts, ", "))
 			b.WriteString(fmt.Sprintf(")%s", textColor()))
 		}
diff --git a/cmd/tui/components/sidebar.go b/cmd/tui/components/sidebar.go
index b5cf8ab..2ea3f85 100644
--- a/cmd/tui/components/sidebar.go
+++ b/cmd/tui/components/sidebar.go
@@ -2,6 +2,7 @@ package components
 
 import (
 	"sort"
+	"strings"
 
 	"github.com/arimxyer/pass-cli/cmd/tui/models"
 	"github.com/arimxyer/pass-cli/cmd/tui/styles"
@@ -10,6 +11,17 @@ import (
 	"github.com/rivo/tview"
 )
 
+// lessFold reports whether a should sort before b, compared case-insensitively.
+// It falls back to a case-sensitive comparison as a tie-break so that strings
+// differing only in case keep a stable, deterministic order.
+func lessFold(a, b string) bool {
+	la, lb := strings.ToLower(a), strings.ToLower(b)
+	if la != lb {
+		return la < lb
+	}
+	return a < b
+}
+
 // NodeReference identifies the type and value of a tree node.
 // Used to distinguish categories from credentials without relying on tree position.
 type NodeReference struct {
@@ -96,7 +108,10 @@ func (s *Sidebar) Refresh() {
 	for category := range groups {
 		categories = append(categories, category)
 	}
-	sort.Strings(categories) // Sort categories alphabetically
+	// Sort categories alphabetically (case-insensitive)
+	sort.Slice(categories, func(i, j int) bool {
+		return lessFold(categories[i], categories[j])
+	})
 
 	// Build category nodes with credential children
 	for _, category := range categories {
@@ -110,10 +125,10 @@ func (s *Sidebar) Refresh() {
 			SetReference(NodeReference{Kind: "category", Value: category}).
 			SetExpanded(false) // Collapsed by default
 
-		// Sort credentials within category for deterministic ordering
+		// Sort credentials within category alphabetically (case-insensitive)
 		credList := groups[category]
 		sort.Slice(credList, func(i, j int) bool {
-			return credList[i].Service < credList[j].Service
+			return lessFold(credList[i].Service, credList[j].Service)
 		})
 
 		// Add credential nodes from sorted list
diff --git a/cmd/tui/components/table.go b/cmd/tui/components/table.go
index 36b0d76..93bd763 100644
--- a/cmd/tui/components/table.go
+++ b/cmd/tui/components/table.go
@@ -2,6 +2,7 @@ package components
 
 import (
 	"fmt"
+	"sort"
 	"time"
 
 	"github.com/arimxyer/pass-cli/cmd/tui/models"
@@ -83,6 +84,12 @@ func (ct *CredentialTable) Refresh() {
 	searchState := ct.appState.GetSearchState()
 	ct.filteredCreds = ct.filterBySearch(categoryFiltered, searchState)
 
+	// Sort by service alphabetically (case-insensitive) so the table matches
+	// the sidebar's ordering; GetCredentials returns map-iteration order.
+	sort.Slice(ct.filteredCreds, func(i, j int) bool {
+		return lessFold(ct.filteredCreds[i].Service, ct.filteredCreds[j].Service)
+	})
+
 	// Get current row count (excluding header)
 	currentRowCount := ct.GetRowCount() - 1
 	newRowCount := len(ct.filteredCreds)
diff --git a/cmd/tui/components/table_test.go b/cmd/tui/components/table_test.go
index f85b2f5..1e95f06 100644
--- a/cmd/tui/components/table_test.go
+++ b/cmd/tui/components/table_test.go
@@ -282,10 +282,13 @@ func TestCredentialTablePopulateRows(t *testing.T) {
 
 	// Setup credentials with different last accessed times
 	now := time.Now()
+	// Includes a lowercase "azure" entry: under a case-sensitive sort it would
+	// land last (ASCII 'a' > 'G'), but case-insensitively it belongs after AWS.
 	mockCreds := []vault.CredentialMetadata{
 		{Service: "AWS", Username: "admin", CreatedAt: now, LastAccessed: now.Add(-30 * time.Second)},
 		{Service: "GitHub", Username: "user", CreatedAt: now, LastAccessed: now.Add(-5 * time.Minute)},
 		{Service: "Database", Username: "dbuser", CreatedAt: now, LastAccessed: time.Time{}},
+		{Service: "azure", Username: "svc", CreatedAt: now, LastAccessed: now.Add(-1 * time.Minute)},
 	}
 	mockVault.SetCredentials(mockCreds)
 	_ = state.LoadCredentials()
@@ -293,27 +296,29 @@ func TestCredentialTablePopulateRows(t *testing.T) {
 	table := NewCredentialTable(state)
 	table.Refresh()
 
-	// Verify row 1 (AWS)
-	row1Col0 := table.GetCell(1, 0)
-	if row1Col0.Text != "AWS" {
-		t.Errorf("Expected 'AWS', got '%s'", row1Col0.Text)
+	// Rows are sorted alphabetically by service (case-insensitive), so the
+	// expected order is AWS, azure, Database, GitHub regardless of insertion order.
+	wantOrder := []string{"AWS", "azure", "Database", "GitHub"}
+	for i, want := range wantOrder {
+		got := table.GetCell(i+1, 0).Text
+		if got != want {
+			t.Errorf("Expected row %d service '%s', got '%s'", i+1, want, got)
+		}
 	}
 
 	// Verify credential reference stored in cell
-	if row1Col0.GetReference() == nil {
+	if table.GetCell(1, 0).GetReference() == nil {
 		t.Error("Expected credential reference in cell, got nil")
 	}
 
-	// Verify row 2 (GitHub) last used formatted
-	row2Col2 := table.GetCell(2, 2)
-	if row2Col2.Text == "" {
+	// GitHub (row 4) last used formatted
+	if got := table.GetCell(4, 2).Text; got == "" {
 		t.Error("Expected formatted last used time")
 	}
 
-	// Verify row 3 (Database) shows "Never" for zero time
-	row3Col2 := table.GetCell(3, 2)
-	if row3Col2.Text != "Never" {
-		t.Errorf("Expected 'Never' for zero LastAccessed, got '%s'", row3Col2.Text)
+	// Database (row 3) shows "Never" for zero time
+	if got := table.GetCell(3, 2).Text; got != "Never" {
+		t.Errorf("Expected 'Never' for zero LastAccessed, got '%s'", got)
 	}
 }
 
diff --git a/cmd/tui/models/state.go b/cmd/tui/models/state.go
index 8f71b6e..46066b5 100644
--- a/cmd/tui/models/state.go
+++ b/cmd/tui/models/state.go
@@ -6,6 +6,7 @@ package models
 import (
 	"fmt"
 	"sort"
+	"strings"
 	"sync"
 
 	"github.com/arimxyer/pass-cli/internal/vault"
@@ -13,6 +14,17 @@ import (
 	"github.com/rivo/tview"
 )
 
+// lessFold reports whether a should sort before b, compared case-insensitively.
+// It falls back to a case-sensitive comparison as a tie-break so that strings
+// differing only in case keep a stable, deterministic order.
+func lessFold(a, b string) bool {
+	la, lb := strings.ToLower(a), strings.ToLower(b)
+	if la != lb {
+		return la < lb
+	}
+	return a < b
+}
+
 // VaultService interface defines the vault operations needed by AppState.
 // This interface enables testing with mock implementations.
 // T020d: Updated AddCredential signature to accept []byte password
@@ -567,12 +579,12 @@ func (s *AppState) updateCategories() {
 		}
 	}
 
-	// Convert map to sorted slice
+	// Convert map to sorted slice (case-insensitive)
 	categories := make([]string, 0, len(categoryMap))
 	for category := range categoryMap {
 		categories = append(categories, category)
 	}
-	sort.Strings(categories)
+	sort.Slice(categories, func(i, j int) bool { return lessFold(categories[i], categories[j]) })
 
 	s.categories = categories
 }
diff --git a/cmd/vault_backup_preview.go b/cmd/vault_backup_preview.go
index eef7131..f188dcf 100644
--- a/cmd/vault_backup_preview.go
+++ b/cmd/vault_backup_preview.go
@@ -107,12 +107,12 @@ func runVaultBackupPreview(cmd *cobra.Command, args []string) error {
 
 	fmt.Printf("Found %d credential(s) in backup:\n\n", credCount)
 
-	// Sort service names alphabetically
+	// Sort service names alphabetically (case-insensitive)
 	services := make([]string, 0, credCount)
 	for service := range vaultData.Credentials {
 		services = append(services, service)
 	}
-	sort.Strings(services)
+	sort.Slice(services, func(i, j int) bool { return lessFold(services[i], services[j]) })
 
 	if previewVerbose {
 		// Verbose: show table with more details