Top 8 Thesys Competitors & Alternatives in 2025
Updated onFind more companies/brands/products like Thesys. We've shortlisted leading alternatives and mapped their strengths, pricing, and go-to-market focus.
Thesys
Thesys is a San Francisco–based startup that provides C1, a Generative UI API and React SDK which converts LLM responses into live, interactive user interfaces for developers and teams.
Starts at $0
Has a free trial
Competitors
#1Est. 2024 • 1 employeellm-ui
Best for SMBsAn open-source React component library that smoothly renders streaming LLM outputs, removes broken markdown, and supports custom interactive blocks for chat interfaces.
Starts at $0
#2Est. 2024 • 2-10 employeesLanguageGUI
Best for power usersAn open-source Figma UI kit and design system for building richer conversational interfaces for large language models.
Starts at $0
#3Est. 2019 • 2-10 employeesGradio
Best for SMBsGradio is an open-source Python library and web toolkit for quickly building, sharing, and embedding interactive machine-learning app demos and interfaces.
Starts at $0
#4Est. 2018 • 11-50 employees • Public (NYSE:SNOW)Streamlit
Best for enterprisesAn open-source Python framework that makes it fast and easy for data scientists and ML engineers to build and share interactive data apps.
Starts at $0
#5Est. 2015 • 201-1k employeesVercel
Best for SMBsCloud platform optimized for frontend and full‑stack apps (creator of Next.js) that provides instant deployments, edge CDN and team collaboration features.
Starts at $0 / month
Has a free trial
Est. 2025 • 1 employeeChampSignal
Best for SMBsGet the insights your competitors don't want you to have. ChampSignal tracks your competitors' websites, social mentions, ads, and SEO, and sends you email alerts only when it matters.
Starts at $39 / month
Has a free trial
#6Est. 2023 • 11-50 employeesLovable
Best for power usersLovable is an AI-powered platform to build apps and websites by chatting with AI, with collaboration features and an enterprise offering. Start for free; paid plans currently start at $25/month (Pro) with a Business plan at $50/month, and the company was founded in 2023.
Starts at $0
#7Est. 2017 • 201-1k employeesRetool
Best for mid-market companiesLow-code platform for building internal tools and app UIs fast, with integrated data sources and workflow/agent capabilities for product and ops teams.
Starts at $0 / month
#8Est. 2019 • 51-200 employeesAppsmith
Best for SMBsOpen-source low-code platform for building internal apps and admin panels that connects to databases and APIs.
Starts at $0 / per user / month
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