Programming Freemium

assistant-ui

Open-source React primitives and managed cloud for AI chat interfaces

Visit official website
PricingFreemium
Starting price$50/mo
Free planYes
Free trialYes
APIYes
Open sourceYes
DeploymentHybrid
Last verifiedJuly 29, 2026
Overview

Tool overview

assistant-ui is listed under Programming AI tools.

Summary

What is assistant-ui?

assistant-ui is an open-source TypeScript and React library for building AI chat and agent interfaces. It provides composable UI primitives, streaming and tool rendering, model integrations, and an optional managed cloud for authentication, thread persistence, search, analytics, and user management.

Best fit

Best for

React developers building production AI chat and agent experiences

Audience

Who is it for?

Frontend developersAI engineersProduct teamsPlatform teams
Recommendation

Decision note

Confirm cloud MAU counting, retention, authorization architecture, analytics, model-runtime compatibility, enterprise security, support, and backend-model costs.

Capabilities

Key features

Composable React chat and agent primitives

Streaming messages and tool-call rendering

Adapters for major AI runtimes and frameworks

Managed thread persistence and search

Workspace authentication and user management

Open-source MIT-licensed core

Workflows

Use cases

Building customer-facing AI chat

Rendering agent tools and actions

Adding persistent conversation history

Standardizing internal copilots

Strengths

Pros

  • Free and open-source frontend core
  • Managed cloud has a permanent free tier
  • Strong documentation and package ecosystem
Considerations

Cons

  • Requires React and TypeScript expertise
  • Model and backend costs are separate
  • Production safety and analytics need configuration
Considerations

Limitations

assistant-ui supplies interface and persistence infrastructure, not a complete AI product. Teams must implement model governance, authentication, authorization, data retention, accessibility, abuse prevention, evaluation, and monitoring.

Cost

Pricing details

Pricing modelFreemium
Starting price$50/mo
Free planYes
Free trialYes
Pricing context

Billing options

Open-source free libraryFree cloud planMonthly subscriptionUsage-based MAU overageCustom enterprise agreement
Pricing context

Pricing note

The assistant-ui library is free and open source under MIT. Assistant Cloud Free costs $0 and includes 200 monthly active users. Pro costs $50 per month with 500 included MAU and $0.10 per additional MAU. Enterprise terms require contact.

View official pricing
Compatibility

Supported programming languages

  • TypeScript
  • React
Connectivity

Integrations

Vercel AI SDK

LangGraph

OpenAI

Anthropic

Google Gemini

MCP

Specs

Technical details

PlatformsWeb
Multilingual supportYes
Login requiredYes
Open sourceYes
LicenseMIT
DeploymentHybrid
CompanyAgentbaseAI Inc.
Launch year2024
Models / versionsassistant-ui Assistant Cloud Runtime adapters
Editions / plansFree, Basic, Professional, Organization, and Custom plans
Data confidenceHigh
Last verifiedJuly 29, 2026
Documentation → Source code → Release notes → Data source →
Decision hub

Finish your evaluation of assistant-ui

Move between similar tools, comparison cards, quick answers, user reviews, and open discussion without leaving the page.

Tools, comparisons & answers

Explore the best next step before choosing assistant-ui

Browse similar tools, open focused comparison cards, and answer the most common buying questions.

Similar tools Comparisons FAQ
Compare

Compare alternatives

See how assistant-ui compares with the closest relevant AI tools.

Build custom comparison
Smart AI comparison assistant-ui vs Amazon CodeWhisperer Compare pricing, ratings, features, AI score, and use cases. Freemium alternative View comparison Smart AI comparison assistant-ui vs Cursor Compare pricing, ratings, features, AI score, and use cases. Freemium alternative View comparison Smart AI comparison assistant-ui vs Codeium Compare pricing, ratings, features, AI score, and use cases. Freemium alternative View comparison Smart AI comparison assistant-ui vs Windsurf Compare pricing, ratings, features, AI score, and use cases. paid alternative View comparison
Answers

Frequently asked questions

assistant-ui is an open-source TypeScript and React library for building AI chat and agent interfaces. It provides composable UI primitives, streaming and tool rendering, model integrations, and an optional managed cloud for authentication, thread persistence, search, analytics, and user management.
React developers building production AI chat and agent experiences
The listed pricing model for assistant-ui is freemium. Pricing can change, so users should verify the latest plan details on the official website.
Yes. The current profile indicates that a free trial is available.
Community proof

User reviews

Real user feedback helps others understand strengths, limitations, and the best-fit workflows before choosing this tool.

No reviews Average rating
0 Total reviews
No reviews yet

Be the first to review assistant-ui

Share what worked, what did not, who this AI tool is best for, and what buyers should verify before choosing it.

Ask in discussion
Tool discussion

Ask or discuss this tool

Ask questions, share workflows, or discuss your experience with this AI tool.

ReplyContinue threads
EditUpdate your posts
ReportKeep it useful
0Total messages
0Threads
0Replies
Start a useful threadAsk, compare workflows, or reply to reviews

Keep it specific and helpful. You can edit or delete your own messages after posting.

Please log in to join the discussion.

Live discussion

Community messages

Reply to messages and keep the discussion useful. Use Report for abuse or spam. Your own posts can be edited or deleted.

No discussion yetBe the first to ask a question or share a useful workflow.