diff --git a/src/server/services/manufacturer.service.ts b/src/server/services/manufacturer.service.ts
new file mode 100644
index 0000000..d9caeed
--- /dev/null
+++ b/src/server/services/manufacturer.service.ts
@@ -0,0 +1,42 @@
+import { asc, eq } from "drizzle-orm";
+import { db as prodDb } from "../../db/index.ts";
+import { manufacturers } from "../../db/schema.ts";
+
+type Db = typeof prodDb;
+
+export type CreateManufacturerInput = {
+	name: string;
+	slug: string;
+	website: string;
+	tier?: number;
+	country?: string;
+};
+
+export async function listManufacturers(db: Db = prodDb) {
+	return db.select().from(manufacturers).orderBy(asc(manufacturers.name));
+}
+
+export async function getManufacturerBySlug(db: Db = prodDb, slug: string) {
+	const [row] = await db
+		.select()
+		.from(manufacturers)
+		.where(eq(manufacturers.slug, slug));
+	return row ?? null;
+}
+
+export async function createManufacturer(
+	db: Db = prodDb,
+	data: CreateManufacturerInput,
+) {
+	const [row] = await db
+		.insert(manufacturers)
+		.values({
+			name: data.name,
+			slug: data.slug,
+			website: data.website,
+			tier: data.tier ?? 1,
+			country: data.country ?? null,
+		})
+		.returning();
+	return row!;
+}
diff --git a/tests/helpers/db.ts b/tests/helpers/db.ts
index fa7c093..6a181de 100644
--- a/tests/helpers/db.ts
+++ b/tests/helpers/db.ts
@@ -25,6 +25,8 @@ const TRUNCATE_TABLES = [
 	"setups",
 	"thread_candidates",
 	"threads",
+	"community_prices",
+	"market_prices",
 	"items",
 	"global_item_tags",
 	"global_items",
@@ -35,6 +37,7 @@ const TRUNCATE_TABLES = [
 	"api_keys",
 	"settings",
 	"categories",
+	"manufacturers",
 	"users",
 ];
 
diff --git a/tests/services/manufacturer.service.test.ts b/tests/services/manufacturer.service.test.ts
new file mode 100644
index 0000000..4caac91
--- /dev/null
+++ b/tests/services/manufacturer.service.test.ts
@@ -0,0 +1,72 @@
+import { beforeEach, describe, expect, it } from "bun:test";
+import { manufacturers } from "../../src/db/schema.ts";
+import {
+	createManufacturer,
+	getManufacturerBySlug,
+	listManufacturers,
+} from "../../src/server/services/manufacturer.service.ts";
+import { createTestDb } from "../helpers/db.ts";
+
+let db: Awaited<ReturnType<typeof createTestDb>>["db"];
+
+beforeEach(async () => {
+	({ db } = await createTestDb());
+});
+
+describe("createManufacturer", () => {
+	it("inserts a manufacturer and returns it", async () => {
+		const result = await createManufacturer(db, {
+			name: "Apidura",
+			slug: "apidura",
+			website: "https://apidura.com",
+			tier: 1,
+			country: "GB",
+		});
+		expect(result.id).toBeGreaterThan(0);
+		expect(result.name).toBe("Apidura");
+		expect(result.slug).toBe("apidura");
+		expect(result.active).toBe(true);
+	});
+
+	it("throws on duplicate slug", async () => {
+		await createManufacturer(db, {
+			name: "Apidura",
+			slug: "apidura",
+			website: "https://apidura.com",
+		});
+		await expect(
+			createManufacturer(db, {
+				name: "Apidura Copy",
+				slug: "apidura",
+				website: "https://other.com",
+			}),
+		).rejects.toThrow();
+	});
+});
+
+describe("getManufacturerBySlug", () => {
+	it("returns manufacturer when found", async () => {
+		await createManufacturer(db, {
+			name: "Revelate Designs",
+			slug: "revelate-designs",
+			website: "https://revelatedesigns.com",
+		});
+		const result = await getManufacturerBySlug(db, "revelate-designs");
+		expect(result?.name).toBe("Revelate Designs");
+	});
+
+	it("returns null when not found", async () => {
+		const result = await getManufacturerBySlug(db, "nope");
+		expect(result).toBeNull();
+	});
+});
+
+describe("listManufacturers", () => {
+	it("returns all manufacturers ordered by name", async () => {
+		await createManufacturer(db, { name: "Ortlieb", slug: "ortlieb", website: "https://ortlieb.com" });
+		await createManufacturer(db, { name: "Apidura", slug: "apidura", website: "https://apidura.com" });
+		const result = await listManufacturers(db);
+		expect(result[0]?.name).toBe("Apidura");
+		expect(result[1]?.name).toBe("Ortlieb");
+	});
+});