diff --git a/api/src/auth/auth.service.ts b/api/src/auth/auth.service.ts
index b1b178f..af4332d 100644
--- a/api/src/auth/auth.service.ts
+++ b/api/src/auth/auth.service.ts
@@ -3,6 +3,7 @@ import {
   HttpException,
   HttpStatus,
   Injectable,
+  NotFoundException,
   UnauthorizedException,
 } from '@nestjs/common';
 import { JwtService } from '@nestjs/jwt';
@@ -159,7 +160,7 @@ export class AuthService {
   private async loginTenant(slug: string, email: string, password: string, ip?: string) {
     const tenant = await this.platform.tenant.findUnique({ where: { slug } });
     if (!tenant) {
-      throw new UnauthorizedException('Credenciais inválidas.');
+      throw new NotFoundException('Este cliente não existe.');
     }
     if (tenant.status !== 'ACTIVE') {
       throw new ForbiddenException('Empresa suspensa.');
@@ -205,8 +206,11 @@ export class AuthService {
 
   private async loginTenantGoogle(slug: string, identity: GoogleIdentity, ip?: string) {
     const tenant = await this.platform.tenant.findUnique({ where: { slug } });
-    if (!tenant || tenant.status !== 'ACTIVE') {
-      throw new UnauthorizedException('Credenciais inválidas.');
+    if (!tenant) {
+      throw new NotFoundException('Este cliente não existe.');
+    }
+    if (tenant.status !== 'ACTIVE') {
+      throw new ForbiddenException('Empresa suspensa.');
     }
     const db = this.tenants.getByDatabase(tenant.database);
     let user =
diff --git a/api/src/platform/platform.module.ts b/api/src/platform/platform.module.ts
index f58134a..6299210 100644
--- a/api/src/platform/platform.module.ts
+++ b/api/src/platform/platform.module.ts
@@ -1,9 +1,10 @@
 import { Module } from '@nestjs/common';
 import { PlatformController } from './platform.controller';
 import { PlatformService } from './platform.service';
+import { PublicTenantsController } from './public-tenants.controller';
 
 @Module({
-  controllers: [PlatformController],
+  controllers: [PlatformController, PublicTenantsController],
   providers: [PlatformService],
 })
 export class PlatformModule {}
diff --git a/api/src/platform/platform.service.ts b/api/src/platform/platform.service.ts
index 67e50aa..64a9eb9 100644
--- a/api/src/platform/platform.service.ts
+++ b/api/src/platform/platform.service.ts
@@ -3,6 +3,7 @@ import * as bcrypt from 'bcrypt';
 import { randomBytes } from 'node:crypto';
 import { PlatformPrismaService } from '../prisma/platform-prisma.service';
 import { createMysqlDatabase, databaseForSlug, pushTenantSchema } from '../tenancy/provision-database';
+import { publicTenantView } from '../tenancy/public-tenant';
 import { TenantConnectionService } from '../tenancy/tenant-connection.service';
 import { normalizeSlug } from '../tenancy/tenant-url';
 import type { CreateTenantDto } from './dto/create-tenant.dto';
@@ -21,6 +22,20 @@ export class PlatformService {
     });
   }
 
+  async publicBySlug(raw: string) {
+    let slug: string;
+    try {
+      slug = normalizeSlug(raw);
+    } catch {
+      throw new NotFoundException('Este cliente não existe.');
+    }
+    const tenant = await this.platform.tenant.findUnique({
+      where: { slug },
+      select: { name: true, slug: true, status: true },
+    });
+    return publicTenantView(tenant);
+  }
+
   async create(actorId: string, dto: CreateTenantDto, ip?: string) {
     const slug = normalizeSlug(dto.slug);
     const exists = await this.platform.tenant.findUnique({ where: { slug } });
diff --git a/api/src/platform/public-tenants.controller.ts b/api/src/platform/public-tenants.controller.ts
new file mode 100644
index 0000000..fe5a974
--- /dev/null
+++ b/api/src/platform/public-tenants.controller.ts
@@ -0,0 +1,12 @@
+import { Controller, Get, Param } from '@nestjs/common';
+import { PlatformService } from './platform.service';
+
+@Controller('tenants')
+export class PublicTenantsController {
+  constructor(private readonly platform: PlatformService) {}
+
+  @Get(':slug')
+  bySlug(@Param('slug') slug: string) {
+    return this.platform.publicBySlug(slug);
+  }
+}
diff --git a/api/src/tenancy/public-tenant.spec.ts b/api/src/tenancy/public-tenant.spec.ts
new file mode 100644
index 0000000..7342603
--- /dev/null
+++ b/api/src/tenancy/public-tenant.spec.ts
@@ -0,0 +1,19 @@
+import { NotFoundException } from '@nestjs/common';
+import { publicTenantView } from './public-tenant';
+
+describe('publicTenantView', () => {
+  it('hides internal fields and returns the public company', () => {
+    expect(
+      publicTenantView({
+        name: 'Cliente 1',
+        slug: 'cliente-1',
+        status: 'ACTIVE',
+      }),
+    ).toEqual({ name: 'Cliente 1', slug: 'cliente-1', status: 'ACTIVE' });
+  });
+
+  it('tells the visitor when the company is missing', () => {
+    expect(() => publicTenantView(null)).toThrow(NotFoundException);
+    expect(() => publicTenantView(null)).toThrow('Este cliente não existe.');
+  });
+});
diff --git a/api/src/tenancy/public-tenant.ts b/api/src/tenancy/public-tenant.ts
new file mode 100644
index 0000000..27eaf19
--- /dev/null
+++ b/api/src/tenancy/public-tenant.ts
@@ -0,0 +1,16 @@
+import { NotFoundException } from '@nestjs/common';
+
+export type PublicTenant = {
+  name: string;
+  slug: string;
+  status: string;
+};
+
+export function publicTenantView(
+  tenant: { name: string; slug: string; status: string } | null,
+): PublicTenant {
+  if (!tenant) {
+    throw new NotFoundException('Este cliente não existe.');
+  }
+  return { name: tenant.name, slug: tenant.slug, status: tenant.status };
+}
diff --git a/docker-compose.yml b/docker-compose.yml
index 54a67ce..b060e62 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -87,6 +87,7 @@ services:
     environment:
       PORT: 3000
       HOSTNAME: 0.0.0.0
+      API_INTERNAL_URL: http://api:3001/api
     ports:
       - "${SINKA_WEB_PORT:-3000}:3000"
     healthcheck:
diff --git a/web/Dockerfile b/web/Dockerfile
index 94bccf2..d9942d6 100644
--- a/web/Dockerfile
+++ b/web/Dockerfile
@@ -21,6 +21,8 @@ ENV NODE_ENV=production
 ENV PORT=3000
 ENV HOSTNAME=0.0.0.0
 ENV NEXT_TELEMETRY_DISABLED=1
+ARG API_INTERNAL_URL=http://api:3001/api
+ENV API_INTERNAL_URL=$API_INTERNAL_URL
 
 COPY --from=builder /app/public ./public
 COPY --from=builder /app/.next/standalone ./
diff --git a/web/src/app/[tenant]/(panel)/layout.tsx b/web/src/app/[tenant]/(panel)/layout.tsx
index c96c8cc..3593ecd 100644
--- a/web/src/app/[tenant]/(panel)/layout.tsx
+++ b/web/src/app/[tenant]/(panel)/layout.tsx
@@ -1,8 +1,11 @@
 import { notFound } from "next/navigation";
 import { RestrictedShell } from "@/components/restricted-shell";
-import { isTenantSlug } from "@/lib/tenants";
+import { TenantMissing } from "@/components/tenant-missing";
+import { fetchPublicTenant, isTenantSlug } from "@/lib/tenants";
 import type { ReactNode } from "react";
 
+export const dynamic = "force-dynamic";
+
 export default async function TenantPanelLayout({
   children,
   params,
@@ -15,6 +18,11 @@ export default async function TenantPanelLayout({
     notFound();
   }
 
+  const company = await fetchPublicTenant(tenant);
+  if (!company) {
+    return <TenantMissing slug={tenant} />;
+  }
+
   return (
     <RestrictedShell kind="tenant" basePath={`/${tenant}`}>
       {children}
diff --git a/web/src/app/[tenant]/login/page.tsx b/web/src/app/[tenant]/login/page.tsx
index c0ca48b..844956f 100644
--- a/web/src/app/[tenant]/login/page.tsx
+++ b/web/src/app/[tenant]/login/page.tsx
@@ -1,7 +1,10 @@
 import { notFound } from "next/navigation";
 import { Suspense } from "react";
 import { LoginForm } from "@/components/login-form";
-import { isTenantSlug } from "@/lib/tenants";
+import { TenantMissing } from "@/components/tenant-missing";
+import { fetchPublicTenant, isTenantSlug } from "@/lib/tenants";
+
+export const dynamic = "force-dynamic";
 
 export default async function TenantLoginPage({ params }: { params: Promise<{ tenant: string }> }) {
   const { tenant } = await params;
@@ -9,6 +12,11 @@ export default async function TenantLoginPage({ params }: { params: Promise<{ te
     notFound();
   }
 
+  const company = await fetchPublicTenant(tenant);
+  if (!company) {
+    return <TenantMissing slug={tenant} />;
+  }
+
   return (
     <Suspense fallback={<main className="flex min-h-dvh items-center justify-center bg-black text-[#E8F4E5]/60">Carregando…</main>}>
       <LoginForm variant="tenant" tenantSlug={tenant} />
diff --git a/web/src/components/tenant-missing.tsx b/web/src/components/tenant-missing.tsx
new file mode 100644
index 0000000..d6f3002
--- /dev/null
+++ b/web/src/components/tenant-missing.tsx
@@ -0,0 +1,29 @@
+import Image from "next/image";
+
+export function TenantMissing({ slug }: { slug: string }) {
+  return (
+    <main className="flex min-h-dvh flex-col bg-black text-[#E8F4E5]">
+      <div className="mx-auto flex w-full max-w-md flex-1 flex-col justify-center px-6 py-16">
+        <a href="/" className="mb-10 block w-fit">
+          <Image
+            src="/brand/sinka-logo.webp"
+            alt="Sinka"
+            width={180}
+            height={58}
+            className="h-8 w-auto"
+            priority
+          />
+        </a>
+        <p className="text-xs font-semibold uppercase tracking-[0.28em] text-[#82C85C]">Cliente</p>
+        <h1 className="font-display mt-2 text-4xl font-extrabold uppercase leading-none">Este cliente não existe</h1>
+        <p className="mt-4 text-[#E8F4E5]/60">
+          Não há empresa cadastrada em <span className="text-[#E8F4E5]">/{slug}</span>. Confira o endereço com quem
+          contratou a Sinka.
+        </p>
+        <a href="/" className="btn-sinka mt-8 w-fit">
+          Voltar
+        </a>
+      </div>
+    </main>
+  );
+}
diff --git a/web/src/lib/tenants.ts b/web/src/lib/tenants.ts
index fd6ad04..1c167d1 100644
--- a/web/src/lib/tenants.ts
+++ b/web/src/lib/tenants.ts
@@ -20,3 +20,25 @@ export function isReservedSlug(slug: string): boolean {
 export function isTenantSlug(slug: string): boolean {
   return /^[a-z][a-z0-9-]{1,30}$/.test(slug) && !isReservedSlug(slug);
 }
+
+export type PublicTenant = {
+  name: string;
+  slug: string;
+  status: string;
+};
+
+export async function fetchPublicTenant(slug: string): Promise<PublicTenant | null> {
+  const origin = (
+    process.env.API_INTERNAL_URL ??
+    process.env.NEXT_PUBLIC_API_URL ??
+    "http://localhost:3001/api"
+  ).replace(/\/$/, "");
+  const response = await fetch(`${origin}/tenants/${encodeURIComponent(slug)}`, { cache: "no-store" });
+  if (response.status === 404) {
+    return null;
+  }
+  if (!response.ok) {
+    throw new Error("Não foi possível verificar o cliente.");
+  }
+  return response.json() as Promise<PublicTenant>;
+}