diff --git a/.changeset/late-results-melt.md b/.changeset/late-results-melt.md
new file mode 100644
index 00000000000..05120d6b387
--- /dev/null
+++ b/.changeset/late-results-melt.md
@@ -0,0 +1,7 @@
+---
+'@clerk/clerk-js': minor
+'@clerk/clerk-react': minor
+'@clerk/types': minor
+---
+
+[Experimental] Signal transfer support
diff --git a/packages/clerk-js/bundlewatch.config.json b/packages/clerk-js/bundlewatch.config.json
index 043117dcec0..0aa61486504 100644
--- a/packages/clerk-js/bundlewatch.config.json
+++ b/packages/clerk-js/bundlewatch.config.json
@@ -2,7 +2,7 @@
   "files": [
     { "path": "./dist/clerk.js", "maxSize": "629KB" },
     { "path": "./dist/clerk.browser.js", "maxSize": "78KB" },
-    { "path": "./dist/clerk.legacy.browser.js", "maxSize": "119KB" },
+    { "path": "./dist/clerk.legacy.browser.js", "maxSize": "120KB" },
     { "path": "./dist/clerk.headless*.js", "maxSize": "61KB" },
     { "path": "./dist/ui-common*.js", "maxSize": "117.1KB" },
     { "path": "./dist/ui-common*.legacy.*.js", "maxSize": "118KB" },
diff --git a/packages/clerk-js/src/core/resources/SignIn.ts b/packages/clerk-js/src/core/resources/SignIn.ts
index 707b2b97261..1a23be65626 100644
--- a/packages/clerk-js/src/core/resources/SignIn.ts
+++ b/packages/clerk-js/src/core/resources/SignIn.ts
@@ -505,6 +505,22 @@ class SignInFuture implements SignInFutureResource {
     return this.resource.supportedFirstFactors ?? [];
   }
 
+  get isTransferable() {
+    return this.resource.firstFactorVerification.status === 'transferable';
+  }
+
+  get existingSession() {
+    if (
+      this.resource.firstFactorVerification.status === 'failed' &&
+      this.resource.firstFactorVerification.error?.code === 'identifier_already_signed_in' &&
+      this.resource.firstFactorVerification.error?.meta?.sessionId
+    ) {
+      return { sessionId: this.resource.firstFactorVerification.error?.meta?.sessionId };
+    }
+
+    return undefined;
+  }
+
   async sendResetPasswordEmailCode(): Promise<{ error: unknown }> {
     return runAsyncResourceTask(this.resource, async () => {
       if (!this.resource.id) {
@@ -556,6 +572,7 @@ class SignInFuture implements SignInFutureResource {
     strategy?: OAuthStrategy | 'saml' | 'enterprise_sso';
     redirectUrl?: string;
     actionCompleteRedirectUrl?: string;
+    transfer?: boolean;
   }): Promise<{ error: unknown }> {
     return runAsyncResourceTask(this.resource, async () => {
       await this.resource.__internal_basePost({
diff --git a/packages/clerk-js/src/core/resources/SignUp.ts b/packages/clerk-js/src/core/resources/SignUp.ts
index 8f9aee5b12e..4fd87d9c9ee 100644
--- a/packages/clerk-js/src/core/resources/SignUp.ts
+++ b/packages/clerk-js/src/core/resources/SignUp.ts
@@ -488,6 +488,26 @@ class SignUpFuture implements SignUpFutureResource {
     return this.resource.unverifiedFields;
   }
 
+  get isTransferable() {
+    return (
+      this.resource.verifications.externalAccount.status === 'transferable' &&
+      this.resource.verifications.externalAccount.error?.code === 'external_account_exists'
+    );
+  }
+
+  get existingSession() {
+    if (
+      (this.resource.verifications.externalAccount.status === 'failed' ||
+        this.resource.verifications.externalAccount.status === 'unverified') &&
+      this.resource.verifications.externalAccount.error?.code === 'identifier_already_signed_in' &&
+      this.resource.verifications.externalAccount.error?.meta?.sessionId
+    ) {
+      return { sessionId: this.resource.verifications.externalAccount.error?.meta?.sessionId };
+    }
+
+    return undefined;
+  }
+
   private async getCaptchaToken(): Promise<{
     captchaToken?: string;
     captchaWidgetType?: CaptchaWidgetType;
@@ -503,6 +523,16 @@ class SignUpFuture implements SignUpFutureResource {
     return { captchaToken, captchaWidgetType, captchaError };
   }
 
+  async create({ transfer }: { transfer?: boolean }): Promise<{ error: unknown }> {
+    return runAsyncResourceTask(this.resource, async () => {
+      const { captchaToken, captchaWidgetType, captchaError } = await this.getCaptchaToken();
+      await this.resource.__internal_basePost({
+        path: this.resource.pathRoot,
+        body: { transfer, captchaToken, captchaWidgetType, captchaError },
+      });
+    });
+  }
+
   async password({ emailAddress, password }: { emailAddress: string; password: string }): Promise<{ error: unknown }> {
     return runAsyncResourceTask(this.resource, async () => {
       const { captchaToken, captchaWidgetType, captchaError } = await this.getCaptchaToken();
@@ -539,6 +569,39 @@ class SignUpFuture implements SignUpFutureResource {
     });
   }
 
+  async sso({
+    strategy,
+    redirectUrl,
+    redirectUrlComplete,
+  }: {
+    strategy: string;
+    redirectUrl: string;
+    redirectUrlComplete: string;
+  }): Promise<{ error: unknown }> {
+    return runAsyncResourceTask(this.resource, async () => {
+      const { captchaToken, captchaWidgetType, captchaError } = await this.getCaptchaToken();
+      await this.resource.__internal_basePost({
+        path: this.resource.pathRoot,
+        body: {
+          strategy,
+          redirectUrl: SignUp.clerk.buildUrlWithAuth(redirectUrl),
+          redirectUrlComplete,
+          captchaToken,
+          captchaWidgetType,
+          captchaError,
+        },
+      });
+
+      const { status, externalVerificationRedirectURL } = this.resource.verifications.externalAccount;
+
+      if (status === 'unverified' && !!externalVerificationRedirectURL) {
+        windowNavigate(externalVerificationRedirectURL);
+      } else {
+        clerkInvalidFAPIResponse(status, SignUp.fapiClient.buildEmailAddress('support'));
+      }
+    });
+  }
+
   async finalize({ navigate }: { navigate?: SetActiveNavigate }): Promise<{ error: unknown }> {
     return runAsyncResourceTask(this.resource, async () => {
       if (!this.resource.createdSessionId) {
diff --git a/packages/clerk-js/src/core/state.ts b/packages/clerk-js/src/core/state.ts
index a78586b920c..5746ed17d98 100644
--- a/packages/clerk-js/src/core/state.ts
+++ b/packages/clerk-js/src/core/state.ts
@@ -42,7 +42,7 @@ export class State implements StateInterface {
     }
 
     if (payload.resource instanceof SignUp) {
-      this.signUpResourceSignal({ resource: payload.resource });
+      this.signUpErrorSignal({ error: payload.error });
     }
   };
 
diff --git a/packages/react/src/experimental.ts b/packages/react/src/experimental.ts
index 73b6ff81985..4926de9ffcb 100644
--- a/packages/react/src/experimental.ts
+++ b/packages/react/src/experimental.ts
@@ -1,7 +1,7 @@
 export { CheckoutButton } from './components/CheckoutButton';
 export { PlanDetailsButton } from './components/PlanDetailsButton';
 export { SubscriptionDetailsButton } from './components/SubscriptionDetailsButton';
-export { useSignInSignal } from './hooks/useClerkSignal';
+export { useSignInSignal, useSignUpSignal } from './hooks/useClerkSignal';
 
 export type {
   __experimental_CheckoutButtonProps as CheckoutButtonProps,
diff --git a/packages/types/src/signIn.ts b/packages/types/src/signIn.ts
index f1f7ff23920..63069becb48 100644
--- a/packages/types/src/signIn.ts
+++ b/packages/types/src/signIn.ts
@@ -129,11 +129,14 @@ export interface SignInResource extends ClerkResource {
 export interface SignInFutureResource {
   availableStrategies: SignInFirstFactor[];
   status: SignInStatus | null;
+  isTransferable: boolean;
+  existingSession?: { sessionId: string };
   create: (params: {
     identifier?: string;
     strategy?: OAuthStrategy | 'saml' | 'enterprise_sso';
     redirectUrl?: string;
     actionCompleteRedirectUrl?: string;
+    transfer?: boolean;
   }) => Promise<{ error: unknown }>;
   password: (params: { identifier?: string; password: string }) => Promise<{ error: unknown }>;
   emailCode: {
diff --git a/packages/types/src/signUp.ts b/packages/types/src/signUp.ts
index eded9a32f1d..7a5b08c6800 100644
--- a/packages/types/src/signUp.ts
+++ b/packages/types/src/signUp.ts
@@ -122,11 +122,15 @@ export interface SignUpResource extends ClerkResource {
 export interface SignUpFutureResource {
   status: SignUpStatus | null;
   unverifiedFields: SignUpIdentificationField[];
+  isTransferable: boolean;
+  existingSession?: { sessionId: string };
+  create: (params: { transfer?: boolean }) => Promise<{ error: unknown }>;
   verifications: {
     sendEmailCode: () => Promise<{ error: unknown }>;
     verifyEmailCode: (params: { code: string }) => Promise<{ error: unknown }>;
   };
   password: (params: { emailAddress: string; password: string }) => Promise<{ error: unknown }>;
+  sso: (params: { strategy: string; redirectUrl: string; redirectUrlComplete: string }) => Promise<{ error: unknown }>;
   finalize: (params: { navigate?: SetActiveNavigate }) => Promise<{ error: unknown }>;
 }