Onlook vs Lovable vs Tempo Labs — Visual React Builders & AI App Development Compared

Visual React development has become a distinct category in 2026, with tools that let designers and developers manipulate real React components through intuitive visual interfaces rather than writing code line by line. This comparison examines three platforms leading this shift: Onlook as an open-source visual editor that connects to your existing codebase, Lovable as a conversational full-stack app builder for rapid product creation, and Tempo Labs as a visual React IDE with multi-agent AI planning and a rich editing canvas.

analyzed by Raşit Akyol March 31, 2026 updated September 5, 2026

Onlook Lovablewinner Tempo Labs

Onlook reviewLovable review

Verdict

Onlook offers a fantastic open-source visual editor for React and Tempo Labs provides rapid frontend visual coding, but Lovable delivers a complete end-to-end product development platform. Lovable writes production-ready React code, provisions and integrates Supabase databases, manages authentication, and syncs directly with GitHub repositories. For founders and product teams who need to convert natural language descriptions into live, database-backed web applications, Lovable is the standout winner. Our pick: Lovable.

Quick Comparison

Feature	Onlook	Lovable	Tempo Labs
Pricing	Open source visual code editor for React and Tailwind CSS (Apache-2.0, $0 self-host). Cloud Free includes basic visual canvas editing, local workspace sync, and limited AI prompts ($0/mo). Cloud Pro ($15–$25/mo) offers unlimited projects, full AI-assisted UI generation and styling refactors, Figma synchronization, and cloud team collaboration. Enterprise provides custom pricing for on-premise deployments, SAML/SSO, custom design system enforcement, and dedicated SLA support.	Lovable features a Free plan with 5 daily build credits, a Pro plan at $25/month with 100 monthly credits and custom domains, a Business plan at $50/month with team workspace and SSO, and custom volume-based Enterprise pricing.	Freemium AI visual code and React UI generation platform. Free plan ($0/mo) includes 30 generation credits (max 5/day), visual WYSIWYG editor, and basic GitHub integration. Pro plan ($30/mo monthly or $20/mo annual tier) includes 150 generation credits, full bidirectional GitHub repository sync, custom UI component libraries, and priority code generation. Enterprise / Agent+ tiers ($4,500/mo or custom quote) offer unlimited credits, hands-on dedicated engineering/design feature development, custom design systems, and enterprise SSO.
Pricing Model	Freemium	Freemium	Freemium
Platforms	React, Next.js, Storybook, shadcn/ui, Git	Web (browser-based)	React, existing codebases, design systems
Open Source	Yes	No	No
Telemetry	Clean	Clean	Clean
Status	Active	Active	Active
Editorial Pick	—	—	—
Last Verified	Sep 6, 2026	Aug 29, 2026	Sep 6, 2026
Description	Onlook is an open-source visual editor for React and Next.js with 25.9K+ GitHub stars that lets designers edit real code-backed interfaces on an infinite canvas. It connects visual changes, AI chat, component and layer inspection, and versioned code workflows so teams can prototype and refine product UI without treating design files as the source of truth.	Build production-ready applications from text and image prompts. Full-stack with Supabase backend, authentication, and one-click deployment. Formerly GPT Engineer, backed by top investors. Targets non-technical founders and product teams who want to go from idea to deployed app in minutes, with AI handling both frontend UI and backend infrastructure setup.	Tempo Labs is a YC-backed AI design and prototyping tool that generates and edits React code directly within a developer's existing codebase, maintaining project styles and conventions. Unlike tools that produce standalone code, Tempo supports both greenfield and brownfield projects, understanding existing component libraries, theme systems, and coding patterns to generate code that fits naturally.

Onlook

Pricing: Open source visual code editor for React and Tailwind CSS (Apache-2.0, $0 self-host). Cloud Free includes basic visual canvas editing, local workspace sync, and limited AI prompts ($0/mo). Cloud Pro ($15–$25/mo) offers unlimited projects, full AI-assisted UI generation and styling refactors, Figma synchronization, and cloud team collaboration. Enterprise provides custom pricing for on-premise deployments, SAML/SSO, custom design system enforcement, and dedicated SLA support.
Pricing Model: Freemium
Platforms: React, Next.js, Storybook, shadcn/ui, Git
Open Source: Yes
Telemetry: Clean
Status: Active
Editorial Pick: —
Last Verified: Sep 6, 2026
Description: Onlook is an open-source visual editor for React and Next.js with 25.9K+ GitHub stars that lets designers edit real code-backed interfaces on an infinite canvas. It connects visual changes, AI chat, component and layer inspection, and versioned code workflows so teams can prototype and refine product UI without treating design files as the source of truth.

Lovablewinner

Pricing: Lovable features a Free plan with 5 daily build credits, a Pro plan at $25/month with 100 monthly credits and custom domains, a Business plan at $50/month with team workspace and SSO, and custom volume-based Enterprise pricing.
Pricing Model: Freemium
Platforms: Web (browser-based)
Open Source: No
Telemetry: Clean
Status: Active
Editorial Pick: —
Last Verified: Aug 29, 2026
Description: Build production-ready applications from text and image prompts. Full-stack with Supabase backend, authentication, and one-click deployment. Formerly GPT Engineer, backed by top investors. Targets non-technical founders and product teams who want to go from idea to deployed app in minutes, with AI handling both frontend UI and backend infrastructure setup.

Tempo Labs

Pricing: Freemium AI visual code and React UI generation platform. Free plan ($0/mo) includes 30 generation credits (max 5/day), visual WYSIWYG editor, and basic GitHub integration. Pro plan ($30/mo monthly or $20/mo annual tier) includes 150 generation credits, full bidirectional GitHub repository sync, custom UI component libraries, and priority code generation. Enterprise / Agent+ tiers ($4,500/mo or custom quote) offer unlimited credits, hands-on dedicated engineering/design feature development, custom design systems, and enterprise SSO.
Pricing Model: Freemium
Platforms: React, existing codebases, design systems
Open Source: No
Telemetry: Clean
Status: Active
Editorial Pick: —
Last Verified: Sep 6, 2026
Description: Tempo Labs is a YC-backed AI design and prototyping tool that generates and edits React code directly within a developer's existing codebase, maintaining project styles and conventions. Unlike tools that produce standalone code, Tempo supports both greenfield and brownfield projects, understanding existing component libraries, theme systems, and coding patterns to generate code that fits naturally.

What Sets Them Apart

Onlook, Lovable, and Tempo Labs bridge visual interface design and production React code with distinct paradigms. Onlook is an open-source visual editor for existing Next.js and React codebases, writing clean Tailwind CSS classes and JSX modifications directly back to local files without vendor lock-in. Lovable is an autonomous full-stack AI web application builder that generates complete web applications from prompts, configuring Supabase backends, database schemas, auth, and frontend layouts. Tempo Labs is an AI-powered visual workspace for production React component systems and design libraries.

Onlook requires an existing local React project to visually tweak styling; Lovable builds full-stack applications from zero to one with database persistence; Tempo Labs targets frontend teams building and refactoring design system components in codebase context.

Onlook, Lovable, and Tempo Labs at a Glance

Onlook inspects the live DOM via a desktop client, maps elements back to source files via AST parsing, and writes clean Tailwind CSS changes directly to disk.

Lovable writes full-stack React/Vite/Tailwind code while automatically provisioning Supabase databases, Row-Level Security, and authentication with two-way GitHub sync.

Tempo Labs renders components in an isolated React runtime canvas, integrating with design tokens and GitHub to visually drag, drop, and edit UI elements.

Technical Architecture and Integration Depth

Onlook uses an AST preprocessor plugin during Next.js development mode, performing exact syntax-preserving modifications on local files without hosted containers.

Lovable pairs LLMs with managed sandboxes, provisioning PostgreSQL schemas, generating TypeScript types, and compiling full-stack applications with self-healing error recovery.

Tempo Labs combines an AST parser with a component-aware generation engine to assemble layouts using existing UI components.

FinOps and Developer Experience

Onlook delivers a zero-marginal-cost developer experience for existing engineering teams, eliminating design polish tickets without subscription fees.

Lovable provides exponential speed advantages for new product creation and MVPs, collapsing weeks of full-stack engineering into hours.

Tempo Labs accelerates component sprint cycles and Figma-to-React handoffs for design system engineering teams.

The Bottom Line

Lovable is the decisive winner for builders and teams seeking to turn concepts into fully functional, database-backed web applications instantly.

FAQ

How do Onlook, Lovable, and Tempo Labs fundamentally differ in their approach to React code generation and editing?

Onlook is a local visual React design tool acting directly on localhost dev servers, parsing local ASTs with Babel and writing Tailwind/JSX diffs directly to Git files. Lovable is a cloud AI full-stack builder generating complete applications (Supabase DB, auth) from prompts. Tempo Labs is an AI visual code editor for React/Tailwind providing a bi-directional canvas generating TypeScript code.

How do they handle Abstract Syntax Tree (AST) integrity, code ownership, and developer lock-in?

Onlook preserves 100% code ownership and AST integrity without proprietary runtimes. Tempo Labs emphasizes bi-directional AST synchronization preserving custom React components, props, and hooks. Lovable manages codebases in the cloud with bi-directional GitHub sync, driving visual editing through conversational LLM updates.

What are the architectural differences in backend and database capabilities among the three tools?

Lovable natively integrates with Supabase, generating PostgreSQL schemas, RLS policies, auth flows, and edge functions. Onlook focuses purely on frontend UI operating agnostically over existing backends. Tempo Labs focuses primarily on frontend component architecture and client state relying on external APIs.

What is the optimal development persona and use-case fit for each tool?

Onlook is built for UI designers and frontend engineers on established React codebases wanting Figma-like direct manipulation on localhost. Tempo Labs is ideal for React developers building new design systems visually with strict TypeScript. Lovable is optimized for rapid scaffolding of complete full-stack web apps from scratch.

Sources & verification

Sources checked: September 5, 2026
Content verified: September 5, 2026

Verification dates are editorial checks. Routine CMS saves and automatic updatedAt timestamps do not advance them.