What is the best React textarea component for AI chat?

Prompt Area is a production-grade React textarea built specifically for AI chat interfaces. It combines @mentions, /commands, #tags, inline markdown, and file attachments in a single component with zero extra dependencies. Distributed as a shadcn registry component, it installs with one command and includes companion components like Action Bar, Status Bar, and Chat Prompt Layout.

How does Prompt Area compare to Tiptap and Lexical?

Prompt Area is purpose-built for prompt and chat inputs with zero dependencies, while Tiptap (ProseMirror-based, 3+ deps) and Lexical (plugin-based, 2+ deps) are general-purpose editor frameworks. Choose Tiptap or Lexical for full document editing with collaborative features. Choose Prompt Area for a lightweight, ready-to-use chat input with mentions, commands, tags, and file attachments.

How do I add @mentions to a React textarea?

Install Prompt Area via the shadcn registry: npx shadcn@latest add https://prompt-area.com/r/prompt-area.json. Then configure a trigger with char "@" and mode "dropdown" to enable @mentions with search and dropdown suggestions. Prompt Area also supports /commands and #tags using the same trigger system.

Does Prompt Area work with Next.js and shadcn/ui?

Yes. Prompt Area is distributed as a shadcn registry component and is designed for Next.js and React projects using Tailwind CSS. It installs with a single command and requires no additional dependencies beyond React and your existing shadcn/tailwind setup.

What are the best alternatives to react-mentions?

Prompt Area is the best alternative to react-mentions if you need more than basic @mentions. It adds /slash commands, #hashtag tags, inline markdown formatting, file and image attachments, undo/redo, and companion components like Action Bar and Chat Prompt Layout — all with zero extra dependencies.

All comparisons

Comparison · Full AI chat UI toolkit

Prompt Area vs assistant-ui

assistant-ui is a full, opinionated AI chat UI toolkit — message threads, runtime, and input together. Prompt Area is just the input layer: a zero-dependency composer with mentions, commands, tags, and attachments that drops into any LLM stack. They can even be used together.

assistant-ui is a popular, YC-backed toolkit for building complete ChatGPT-style chat experiences in React. It brings the whole thread — message list, runtime/state, and the composer — and integrates with frameworks like the Vercel AI SDK and LangChain.

Prompt Area solves a smaller, sharper problem: the input itself. It does not own your message thread or runtime, which means no lock-in and full freedom over your chat architecture. If you want the composer specifically — with mentions, commands, tags, and attachments — Prompt Area is a drop-in textarea. The two are complementary as much as competitive: Prompt Area can serve as the input inside an assistant-ui app.

What is assistant-ui?

assistant-ui is a full-stack, opinionated AI chat UI kit. It provides the message thread, runtime/state management, and composer as an integrated system, with adapters for common LLM frameworks. It is the fastest way to ship a complete chat surface — at the cost of adopting its architecture.

Feature comparison

Feature	Prompt Area	assistant-ui
Chat input / composer
@Mentions
/Slash commands
#Hashtag tags
Inline markdown in input
File & image attachments
Message thread / runtime
No architectural lock-in
Works inside any chat stack
Extra dependencies	0	several

Where Prompt Area wins

Just the input — no message thread or runtime to adopt
No lock-in: bring your own state, transport, and LLM provider
Zero dependencies and shadcn registry source you own
Can be used as the composer inside an assistant-ui app

Where assistant-ui wins

A complete chat experience out of the box, not just the input
Built-in runtime/state and message thread rendering
Adapters for the Vercel AI SDK, LangChain, and more
Fastest path to a full ChatGPT-style UI when you want the whole kit

Choose Prompt Area when…

You only need the input/composer, not the whole chat UI
You already have (or want to own) your message thread and runtime
You want zero dependencies and no architectural lock-in
You want a composer you can drop into any existing chat app

Choose assistant-ui when…

You want a complete chat UI — thread, runtime, and input together
You want built-in adapters for LLM frameworks
You are starting from scratch and want the fastest full-chat path

Frequently asked questions

Can I use Prompt Area with assistant-ui?

Yes. Prompt Area is just the input layer, so it can serve as the composer inside an assistant-ui app while assistant-ui handles the message thread and runtime. They are complementary.

What is the difference between Prompt Area and assistant-ui?

assistant-ui is a full AI chat UI kit (thread + runtime + input). Prompt Area is only the input — a zero-dependency composer with no lock-in that works inside any chat stack, including assistant-ui.

Try Prompt Area

Install the shadcn registry component and drop a production-grade chat input into your app.

npx shadcn@latest add https://prompt-area.com/r/prompt-area.json

View the demo Star on GitHub

Feature

Prompt Area

assistant-ui

Chat input / composer

@Mentions

/Slash commands

#Hashtag tags

Inline markdown in input

File & image attachments

Message thread / runtime

No architectural lock-in

Works inside any chat stack

Extra dependencies

several

Frequently asked questions

Can I use Prompt Area with assistant-ui?

Yes. Prompt Area is just the input layer, so it can serve as the composer inside an assistant-ui app while assistant-ui handles the message thread and runtime. They are complementary.