Top 7 Assistant UI Competitors & Alternatives in 2026
Updated onFind more companies/brands/products like Assistant UI. We've shortlisted leading alternatives and mapped their strengths, pricing, and go-to-market focus.
Assistant UI
An open-source TypeScript/React library of composable primitives and a hosted backend for building production AI chat interfaces and generative UI.
Competitors
#1 Est. 2024 • 11-50 employees • PrivateReachat
Best for enterprisesReachat is an open-source ReactJS UI library that provides customizable components for building LLM-powered and chat interfaces quickly.
Starts at $0
#2 Est. 2023 • 11-50 employees • PrivateCopilotKit
Best for SMBsCopilotKit is an open-source agentic application framework that helps developers integrate AI copilots and user-facing agents into their applications, with optional hosted cloud and enterprise plans.
Owned by Tawkit, Inc.Starts at $0 / developer seat / month
#3 Est. 2024 • 2-10 employees • PrivateSuperinterface
Best for SMBsSuperinterface is an open-source platform and component library that lets product teams embed customizable AI chat and voice assistants with function calling directly into their websites and apps using their own AI provider APIs.
Starts at $49 / month
Has a free trial
#4 Est. 2021 • 1 employee • PrivateCopilot.js
Best for SMBsCopilot.js is a frontend toolkit and SaaS platform that lets developers embed customizable AI copilots into React and JavaScript applications.
Starts at $0.01 / 1K characters / other
Has a free trial
- Est. 2025 • 1 employee • Private
ChampSignal
Best for SMBsGet the insights your competitors don't want you to have. ChampSignal discovers, monitors, and analyzes your competitors. So you always know what your competitors are up to.
Starts at $39 / month
Has a free trial
#5 Est. 2023 • 1 employee • PrivateLangUI
Best for power usersLangUI is an open-source Tailwind CSS component library that provides free, ready-to-use UI components tailored for AI, GPT, and LLM-based applications.
Starts at $0
#6
Est. 2015 • 201-1k employees • PrivateAI SDK
Best for mid-market companiesAn open-source TypeScript SDK from Vercel that provides a unified, provider-agnostic toolkit for building AI-powered applications.
Starts at $0
#7 Est. 2023 • 11-50 employees • PrivateOpen WebUI
Best for power usersOpen WebUI is an open-source, self-hosted AI platform and web interface for running and managing chat-style interactions with local and cloud large language models via a provider-agnostic, extensible UI.
Starts at $0
Market overlap
Asymmetric competition means that Assistant UI is a competitor of these companies, but they are not necessarily competitors of Assistant UI.
Est. 2023 • 2-10 employees • PrivateTambo
Best for SMBsFounded in 2023, Tambo is a privately held generative UI and AI orchestration framework and cloud platform with a 2–10 person team that lets React developers add AI assistants and agents with dynamic components to their applications using a few lines of code and offers a free starter tier.
Starts at $0 / month
Go Deeper
A competitor list is just the start
Go from list to strategy. See how each competitor positions themselves, who they target, and where the gaps are.
Competitive Intelligence Report
22 pages of competitive intelligence. Built for teams who can't hire a full-time analyst.
$129
Everything you get in your report:
Pricing Fully Exposed
See exactly what competitors charge, their tiers, trials, and guarantees.
Feature Matrix: Build vs Skip
Table stakes every competitor has. Differentiators only 1-2 have.
Reviews You Can Use
Real quotes from G2/Capterra. Ready for your messaging.
10 Competitors Mapped
Direct, indirect, and alternatives. Positioning, ICP, and differentiators.
SEO Gaps Worth Targeting
Keywords they rank for, you don't. With "Quick Win" tags.
Their Best-Performing Ads
Top-performing Google & Meta ads. Landing page screenshots with CTAs.
15+ Data Sources
APIs, LLMs, scrapers. Data ChatGPT can't access.