# Markstream vs slopus/happy — Fit & Features

Canonical: https://trutool.co/compare/markstream-vs-slopus-happy
Author: Snehil (https://trutool.co/authors/snehil)

Compare Markstream and slopus/happy by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### Markstream
Streaming Markdown renderers for AI applications across Vue, React, Svelte, Angular, Nuxt, and Next.js. Render LLM token streams, SSE/WebSocket output, AI chat messages, and long documents with progressive Mermaid, KaTeX, and streaming code blocks.
Best fit: People and teams evaluating ai coding assistants for a specific workflow.
- Document workflows
Before you choose: Test a representative task, inspect outputs, and confirm integrations, permissions, data handling, licensing, and current costs.
Pricing: https://markstream.simonhe.me
- [Read Markstream profile](https://trutool.co/tools/markstream): Read Markstream profile

### slopus/happy
Happy is the open-source desktop app for Claude Code, Codex, and Grok, with an iOS and Android app to control your coding agents from anywhere.
Best fit: People and teams evaluating ai coding assistants for a specific workflow.
- Core product workflow
Before you choose: Test a representative task, inspect outputs, and confirm integrations, permissions, data handling, licensing, and current costs.
Pricing: https://github.com/pricing
- [Read slopus/happy profile](https://trutool.co/tools/slopus-happy): Read slopus/happy profile