diff --git a/conventional.yaml b/conventional.yaml
index e3929a83..0c9df059 100644
--- a/conventional.yaml
+++ b/conventional.yaml
@@ -430,6 +430,12 @@ accounts:
         offer-list:
             #- "oragono.test"
 
+    # modes that are set by default when a user connects
+    # if unset, no user modes will be set by default
+    # +i is invisible (a user's channels are hidden from whois replies)
+    # see  /QUOTE HELP umodes  for more user modes
+    # default-user-modes: +i
+
     # support for deferring password checking to an external LDAP server
     # you should probably ignore this section! consult the grafana docs for details:
     # https://grafana.com/docs/grafana/latest/auth/ldap/
diff --git a/irc/client.go b/irc/client.go
index 1443d6f7..b636678a 100644
--- a/irc/client.go
+++ b/irc/client.go
@@ -318,6 +318,10 @@ func (server *Server) RunClient(conn clientConn, proxyLine string) {
 	session.idletimer.Initialize(session)
 	session.resetFakelag()
 
+	for _, defaultMode := range config.Accounts.defaultUserModes {
+		client.SetMode(defaultMode, true)
+	}
+
 	if conn.Config.TLSConfig != nil {
 		client.SetMode(modes.TLS, true)
 		// error is not useful to us here anyways so we can ignore it
@@ -371,6 +375,10 @@ func (server *Server) AddAlwaysOnClient(account ClientAccount, chnames []string,
 		alwaysOn: true,
 	}
 
+	for _, defaultMode := range config.Accounts.defaultUserModes {
+		client.SetMode(defaultMode, true)
+	}
+
 	client.SetMode(modes.TLS, true)
 	client.writerSemaphore.Initialize(1)
 	client.history.Initialize(0, 0)
diff --git a/irc/config.go b/irc/config.go
index 42d58512..e40f04cc 100644
--- a/irc/config.go
+++ b/irc/config.go
@@ -261,6 +261,8 @@ type AccountConfig struct {
 		Exempted     []string
 		exemptedNets []net.IPNet
 	} `yaml:"require-sasl"`
+	DefaultUserModes   *string `yaml:"default-user-modes"`
+	defaultUserModes   modes.Modes
 	LDAP               ldap.ServerConfig
 	LoginThrottling    ThrottleConfig `yaml:"login-throttling"`
 	SkipServerPassword bool           `yaml:"skip-server-password"`
@@ -982,6 +984,8 @@ func LoadConfig(filename string) (config *Config, err error) {
 		}
 	}
 
+	config.Accounts.defaultUserModes = ParseDefaultUserModes(config.Accounts.DefaultUserModes)
+
 	config.Accounts.RequireSasl.exemptedNets, err = utils.ParseNetList(config.Accounts.RequireSasl.Exempted)
 	if err != nil {
 		return nil, fmt.Errorf("Could not parse require-sasl exempted nets: %v", err.Error())
diff --git a/irc/modes.go b/irc/modes.go
index e6f2c04e..86912474 100644
--- a/irc/modes.go
+++ b/irc/modes.go
@@ -20,6 +20,10 @@ var (
 	DefaultChannelModes = modes.Modes{
 		modes.NoOutside, modes.OpOnlyTopic,
 	}
+
+	// DefaultUserModes are set on all users when they login.
+	// this can be overridden in the `accounts` config, with the `default-user-modes` key
+	DefaultUserModes = modes.Modes{}
 )
 
 // ApplyUserModeChanges applies the given changes, and returns the applied changes.
@@ -102,21 +106,35 @@ func ApplyUserModeChanges(client *Client, changes modes.ModeChanges, force bool,
 	return applied
 }
 
+// parseDefaultModes uses the provided mode change parser to parse the rawModes.
+func parseDefaultModes(rawModes string, parser func(params ...string) (modes.ModeChanges, map[rune]bool)) modes.Modes {
+	modeChangeStrings := strings.Fields(rawModes)
+	modeChanges, _ := parser(modeChangeStrings...)
+	defaultModes := make(modes.Modes, 0)
+	for _, modeChange := range modeChanges {
+		if modeChange.Op == modes.Add {
+			defaultModes = append(defaultModes, modeChange.Mode)
+		}
+	}
+	return defaultModes
+}
+
 // ParseDefaultChannelModes parses the `default-modes` line of the config
 func ParseDefaultChannelModes(rawModes *string) modes.Modes {
 	if rawModes == nil {
 		// not present in config, fall back to compile-time default
 		return DefaultChannelModes
 	}
-	modeChangeStrings := strings.Fields(*rawModes)
-	modeChanges, _ := modes.ParseChannelModeChanges(modeChangeStrings...)
-	defaultChannelModes := make(modes.Modes, 0)
-	for _, modeChange := range modeChanges {
-		if modeChange.Op == modes.Add {
-			defaultChannelModes = append(defaultChannelModes, modeChange.Mode)
-		}
+	return parseDefaultModes(*rawModes, modes.ParseChannelModeChanges)
+}
+
+// ParseDefaultUserModes parses the `default-user-modes` line of the config
+func ParseDefaultUserModes(rawModes *string) modes.Modes {
+	if rawModes == nil {
+		// not present in config, fall back to compile-time default
+		return DefaultUserModes
 	}
-	return defaultChannelModes
+	return parseDefaultModes(*rawModes, modes.ParseUserModeChanges)
 }
 
 // ApplyChannelModeChanges applies a given set of mode changes.
diff --git a/irc/modes_test.go b/irc/modes_test.go
index ece33313..005d0555 100644
--- a/irc/modes_test.go
+++ b/irc/modes_test.go
@@ -35,6 +35,31 @@ func TestParseDefaultChannelModes(t *testing.T) {
 	}
 }
 
+func TestParseDefaultUserModes(t *testing.T) {
+	iR := "+iR"
+	i := "+i"
+	empty := ""
+	rminusi := "+R -i"
+
+	var parseTests = []struct {
+		raw      *string
+		expected modes.Modes
+	}{
+		{&iR, modes.Modes{modes.Invisible, modes.RegisteredOnly}},
+		{&i, modes.Modes{modes.Invisible}},
+		{&empty, modes.Modes{}},
+		{&rminusi, modes.Modes{modes.RegisteredOnly}},
+		{nil, modes.Modes{}},
+	}
+
+	for _, testcase := range parseTests {
+		result := ParseDefaultUserModes(testcase.raw)
+		if !reflect.DeepEqual(result, testcase.expected) {
+			t.Errorf("expected modes %s, got %s", testcase.expected, result)
+		}
+	}
+}
+
 func TestUmodeGreaterThan(t *testing.T) {
 	if !umodeGreaterThan(modes.Halfop, modes.Voice) {
 		t.Errorf("expected Halfop > Voice")
diff --git a/oragono.yaml b/oragono.yaml
index 9ae504ab..9bf309e5 100644
--- a/oragono.yaml
+++ b/oragono.yaml
@@ -451,6 +451,12 @@ accounts:
         offer-list:
             #- "oragono.test"
 
+    # modes that are set by default when a user connects
+    # if unset, no user modes will be set by default
+    # +i is invisible (a user's channels are hidden from whois replies)
+    # see  /QUOTE HELP umodes  for more user modes
+    # default-user-modes: +i
+
     # support for deferring password checking to an external LDAP server
     # you should probably ignore this section! consult the grafana docs for details:
     # https://grafana.com/docs/grafana/latest/auth/ldap/