Backend

2026-06-24

Convex vs Firebase: Real-Time Backend Showdown

Convex vs Firebase: Real-Time Backend Showdown

1. The Real-Time Backend Landscape

Firebase has been the go-to backend-as-a-service for years, offering real-time databases, authentication, and hosting. Convex is a newer entrant that combines a real-time database with serverless functions in a single, type-safe platform. Here is how they compare for modern applications.

2. Firebase: The Mature Ecosystem

Firebase offers a comprehensive suite: Firestore (NoSQL database), Authentication, Cloud Functions, Storage, and Hosting. It is battle-tested and scales to millions of users. The free tier is generous.

1import { initializeApp } from "firebase/app";
2import { getFirestore, collection, addDoc, onSnapshot } from "firebase/firestore";
3
4const app = initializeApp({ /* config */ });
5const db = getFirestore(app);
6
7// Real-time listener
8const unsubscribe = onSnapshot(collection(db, "tasks"), (snapshot) => {
9snapshot.docChanges().forEach((change) => {
10  console.log(change.doc.data());
11});
12});
13
14// Add document
15await addDoc(collection(db, "tasks"), { title: "New Task", done: false });

3. Convex: Type-Safe Full-Stack

Convex provides a single platform with a real-time database, serverless functions, and schema enforcement. Queries are defined on the server and automatically push updates to all connected clients. TypeScript types flow from database to client.

1// convex/schema.ts — type-safe schema
2import { defineSchema, defineTable } from "convex/server";
3import { v } from "convex/values";
4
5export default defineSchema({
6tasks: defineTable({
7  title: v.string(),
8  done: v.boolean(),
9  userId: v.id("users"),
10}).index("by_user", ["userId"]),
11});
12
13// convex/tasks.ts — server query
14import { query, mutation } from "./_generated/server";
15
16export const list = query({
17handler: async (ctx) => {
18  return await ctx.db.query("tasks").collect();
19},
20});
21
22export const add = mutation({
23args: { title: v.string() },
24handler: async (ctx, args) => {
25  return await ctx.db.insert("tasks", { title: args.title, done: false });
26},
27});

4. Feature Comparison

5. Verdict

Choose Firebase if you need a mature ecosystem with authentication, hosting, and extensive documentation. Choose Convex if you are building a TypeScript application and want end-to-end type safety, automatic real-time sync, and a unified development experience. Convex's developer experience is superior for TypeScript projects, while Firebase offers more services out of the box.