diff --git a/apps/website/app/api/contact/route.ts b/apps/website/app/api/contact/route.ts
index cdf54df..b437e7f 100644
--- a/apps/website/app/api/contact/route.ts
+++ b/apps/website/app/api/contact/route.ts
@@ -4,6 +4,8 @@ import type { NextRequest } from "next/server";
 import { NextResponse } from "next/server";
 import { Resend } from "resend";
 
+const FREE_EMAIL_DOMAINS: Set<string> = new Set(require("free-email-domains"));
+
 interface ContactFormData {
 	inquiryType: "support" | "sales";
 	firstName: string;
@@ -52,6 +54,17 @@ export async function POST(request: NextRequest) {
 			);
 		}
 
+		// Reject free email providers for sales inquiries
+		if (body.inquiryType === "sales") {
+			const domain = body.email.split("@")[1]?.toLowerCase();
+			if (domain && FREE_EMAIL_DOMAINS.has(domain)) {
+				return NextResponse.json(
+					{ error: "Please use your work email address to contact sales" },
+					{ status: 400 },
+				);
+			}
+		}
+
 		// Submit to HubSpot if it's a sales inquiry
 		if (body.inquiryType === "sales") {
 			try {
diff --git a/apps/website/components/ContactForm.tsx b/apps/website/components/ContactForm.tsx
index 9932a58..bf2fb3c 100644
--- a/apps/website/components/ContactForm.tsx
+++ b/apps/website/components/ContactForm.tsx
@@ -12,6 +12,8 @@ import {
 } from "@/components/ui/select";
 import { useState } from "react";
 
+const FREE_EMAIL_DOMAINS: Set<string> = new Set(require("free-email-domains"));
+
 interface ContactFormData {
 	inquiryType: "" | "support" | "sales";
 	deploymentType: "" | "cloud" | "self-hosted";
@@ -69,6 +71,12 @@ export function ContactForm({
 			newErrors.email = "Email is required";
 		} else if (!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(formData.email)) {
 			newErrors.email = "Please enter a valid email address";
+		} else if (
+			formData.inquiryType === "sales" &&
+			FREE_EMAIL_DOMAINS.has(formData.email.split("@")[1]?.toLowerCase())
+		) {
+			newErrors.email =
+				"Please use your work email address to contact sales";
 		}
 		if (!formData.company.trim()) {
 			newErrors.company = "Company name is required";
diff --git a/apps/website/package.json b/apps/website/package.json
index cb18537..7a4285b 100644
--- a/apps/website/package.json
+++ b/apps/website/package.json
@@ -35,6 +35,7 @@
 		"class-variance-authority": "^0.7.0",
 		"clsx": "^2.1.0",
 		"framer-motion": "^11.3.19",
+		"free-email-domains": "^1.2.26",
 		"hast-util-to-jsx-runtime": "^2.3.5",
 		"lucide-react": "0.364.0",
 		"next": "16.1.5",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f993cb3..b112bbb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -32,7 +32,7 @@ importers:
     dependencies:
       '@next/third-parties':
         specifier: 16.0.7
-        version: 16.0.7(next@16.1.5(@babel/core@7.26.9)(react-dom@19.2.1(react@19.2.1))(react@19.2.1))(react@19.2.1)
+        version: 16.0.7(next@16.1.5(react-dom@19.2.1(react@19.2.1))(react@19.2.1))(react@19.2.1)
       '@radix-ui/react-dropdown-menu':
         specifier: ^2.1.16
         version: 2.1.16(@types/react-dom@19.2.2(@types/react@19.2.2))(@types/react@19.2.2)(react-dom@19.2.1(react@19.2.1))(react@19.2.1)
@@ -111,7 +111,7 @@ importers:
         version: 0.2.1(tailwindcss@3.4.7)
       '@next/third-parties':
         specifier: 16.0.7
-        version: 16.0.7(next@16.1.5(@babel/core@7.26.9)(react-dom@19.2.1(react@19.2.1))(react@19.2.1))(react@19.2.1)
+        version: 16.0.7(next@16.1.5(react-dom@19.2.1(react@19.2.1))(react@19.2.1))(react@19.2.1)
       '@prettier/plugin-xml':
         specifier: ^3.4.1
         version: 3.4.1(prettier@3.3.3)
@@ -172,6 +172,9 @@ importers:
       framer-motion:
         specifier: ^11.3.19
         version: 11.3.19(react-dom@19.2.1(react@19.2.1))(react@19.2.1)
+      free-email-domains:
+        specifier: ^1.2.26
+        version: 1.2.26
       hast-util-to-jsx-runtime:
         specifier: ^2.3.5
         version: 2.3.6
@@ -2783,6 +2786,10 @@ packages:
       react-dom:
         optional: true
 
+  free-email-domains@1.2.26:
+    resolution: {integrity: sha512-HHk4Fp8ts63MDIpnd3LCbfUNAqj6Ea9kjXWUv15zbmEZRR7f7TtBLUvK56ZtyjR6voCdZ1xG1DNIme7yUl9vww==}
+    engines: {node: '>= 18'}
+
   fsevents@2.3.3:
     resolution: {integrity: sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==}
     engines: {node: ^8.16.0 || ^10.6.0 || >=11.0.0}
@@ -5153,7 +5160,7 @@ snapshots:
   '@next/swc-win32-x64-msvc@16.1.5':
     optional: true
 
-  '@next/third-parties@16.0.7(next@16.1.5(@babel/core@7.26.9)(react-dom@19.2.1(react@19.2.1))(react@19.2.1))(react@19.2.1)':
+  '@next/third-parties@16.0.7(next@16.1.5(react-dom@19.2.1(react@19.2.1))(react@19.2.1))(react@19.2.1)':
     dependencies:
       next: 16.1.5(@babel/core@7.26.9)(react-dom@19.2.1(react@19.2.1))(react@19.2.1)
       react: 19.2.1
@@ -6858,6 +6865,8 @@ snapshots:
       react: 19.2.1
       react-dom: 19.2.1(react@19.2.1)
 
+  free-email-domains@1.2.26: {}
+
   fsevents@2.3.3:
     optional: true