---
title: NoLag vs Convex
description: "NoLag vs Convex: Convex is a reactive backend with a built-in database and TypeScript functions. NoLag is dedicated realtime messaging infrastructure with blueprint SDKs and a coordination layer for AI agents."
---

# NoLag vs Convex

Convex is a reactive backend-as-a-service: you write TypeScript functions against a managed document database, and your app re-renders automatically when the underlying data changes. NoLag is dedicated realtime messaging infrastructure built on pub/sub, plus two things Convex does not focus on: blueprint SDKs for common app patterns, and a coordination layer built for AI agents.

Short version: if you want a full managed backend where reactive queries over your data are the model, Convex is a great fit. If you want an explicit realtime messaging layer, multi-language SDKs, and agent coordination that sits alongside whatever backend you already have, NoLag is built for that.

## At a glance

| | NoLag | Convex |
| --- | --- | --- |
| Core model | Realtime pub/sub over WebSocket | Reactive queries over a managed document database |
| Backend model | Messaging layer in front of your stack | Full backend: database plus TypeScript functions |
| High-level SDKs | Blueprints for chat, notify, feed, dashboards, tracking, sync, and more | Reactive query and mutation APIs |
| AI-agent coordination | Built in: dispatch, share state, observe, approve | Not a focus |
| Delivery | Presence, QoS levels | Reactive subscriptions, transactional writes |
| SDKs | JavaScript/TypeScript, Go, Python | TypeScript-first, client libraries |

## Where NoLag is different

- **Messaging, not a backend runtime.** NoLag is pub/sub you can add to any stack, rather than a place to run your application functions and store your data.
- **Blueprint SDKs.** A domain-specific API for chat, notifications, dashboards, tracking, and more, so you skip the plumbing.
- **A coordination layer for AI agents.** Dispatch, share state, observe decisions, and gate actions with human approval, framework-agnostic and on the same infrastructure as your app features.
- **Multi-language.** First-class JavaScript/TypeScript, Go, and Python SDKs, not TypeScript only.

## Where Convex is a strong fit

- You want a single managed backend for data, functions, and reactivity.
- Your app model is naturally reactive queries over stored state.
- You are building primarily in TypeScript.

## When to choose NoLag

- You are building AI-agent features and want coordination primitives, not just reactive state.
- You want higher-level SDKs to ship common realtime patterns quickly.
- You need realtime across JavaScript, Go, and Python, independent of your backend.

## Try it

Follow the [5-minute quick start](/docs/getting-started), then look at the [high-level SDKs](/docs/high-level-sdks) and the [AI agents](/docs/agents) guide.