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AI App Builders Comparison

a0.dev vs. Retool

At a glance

At a glance

a0.dev

Best for

Best for founders who want to ship a native mobile app to the App Store from a prompt.

  • Freelancers
  • Small and mid-sized

Retool

Best for

Best for engineering and operations teams building internal tools on top of existing databases and APIs.

  • Small and mid-sized
  • Enterprise

Cataleo does not name a winner. Both statements come from the vendors themselves.

Full Comparison

Criterion a0.dev Retool
Starting price Not stated Free; paid plans from $10 / builder / month Annual billing: Team $10 per builder and $5 per internal user per month, Business $50 per builder and $15 per internal user. On monthly billing that becomes $12 / $7 and $65 / $18. Enterprise on request.
Free trial Not stated Free plan for up to 5 users
Output Native iOS and Android apps (React Native), plus web Internal web and mobile apps, workflows and AI agents
API Yes Yes, the Retool API manages the organisation, its users and Spaces
Hosting Not stated Retool cloud or self-hosted
What it generates Native mobile apps for iOS and Android (plus web), from a prompt Internal tools: web and mobile apps, scheduled and event-driven workflows, and AI agents; an AI app builder starts an app from a prompt next to the classic drag-and-drop editor
Stack and frameworks React Native Drag-and-drop component library with JavaScript in queries, bindings and transformers; custom components are written in React and TypeScript and published to the organisation's component library
Auth and database Managed backend with a choice of Convex or Supabase for the database, plus built-in push notifications Connects to any database, API or LLM provider, with a hosted Retool Database included; permissions and audit logging from the Business tier, SSO and SCIM on Enterprise
Hosting and deploy One-click publishing to the App Store and Google Play (IPA/APK), with a web preview Retool cloud or self-hosted; the free, Team and Business tiers can both be self-hosted, Enterprise adds unlimited end users and white-labelling
Payments Built-in monetization: subscriptions and one-time purchases via the App Store No built-in billing or checkout; a payment provider is connected as an API resource like any other
Access to the code Projects are built on Expo and edited by the agent inside a0's own workspace. The documentation covers runtime and Expo SDK upgrades, over-the-air updates and store publishing, and documents no source-code download, GitHub sync or local development Apps live in Retool rather than as an exportable codebase; JavaScript and custom React components extend them, and Git-backed source control is an Enterprise feature
Deployment Cloud (SaaS), Browser-based more entries Cloud (SaaS), Browser-based, On-premise
Support Community forum Community forum
Onboarding Documentation and knowledge base Documentation and knowledge base
Company size Freelancers, Small and mid-sized Small and mid-sized, Enterprise
Integrations Convex, Supabase, App Store Connect, Google Play, Firebase Cloud Messaging OpenAI, Anthropic, Google, AWS Bedrock, Azure OpenAI

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Row where the values differ The small markers point at the lower number, the longer list or the stated feature. They describe the data, they are not a verdict.

The short version

Key Differences

  • Deployment a0.dev Cloud (SaaS), Browser-based Retool Cloud (SaaS), Browser-based, On-premise
  • Company size a0.dev Freelancers, Small and mid-sized Retool Small and mid-sized, Enterprise
  • Output a0.dev Native iOS and Android apps (React Native), plus web Retool Internal web and mobile apps, workflows and AI agents
  • API a0.dev Yes Retool Yes, the Retool API manages the organisation, its users and Spaces
  • What it generates a0.dev Native mobile apps for iOS and Android (plus web), from a prompt Retool Internal tools: web and mobile apps, scheduled and event-driven workflows, and AI agents; an AI app builder starts an app from a prompt next to the classic drag-and-drop editor

Every line is one datapoint from the table above, picked automatically. Nothing here is written text.

The trade-offs

Strengths and Limitations

a0.dev

Strengths

  • Generates a full React Native app and publishes it to the App Store and Google Play
  • Built-in monetization with subscriptions and one-time purchases
  • Convex backend and push notifications wired in

Limitations

  • Primarily a mobile app builder: it generates native iOS and Android apps, with web as a secondary target
  • Output is React Native on Expo, so you work within that stack rather than a framework of your choice

Retool

Strengths

  • Connects to any database, API or LLM provider instead of starting from its own data
  • Self-hosting is available on every tier, the free one included
  • Extensible with JavaScript everywhere and custom React and TypeScript components

Limitations

  • Priced per builder and per internal user, so cost tracks headcount rather than apps
  • Apps are not an exportable codebase, so leaving the platform means rebuilding
  • Git source control, SSO and SCIM are Enterprise-only

Plans

Pricing

Retool

  • Free $0 Up to 5 users, unlimited apps, 500 workflow runs a month, 5 GB database and 5 GB file storage, 250 AI credits a month.
  • Team $10 Per builder per month on annual billing ($12 monthly); internal users $5 ($7 monthly). 5,000 workflow runs a month, staging environment, release versions.
  • Business $50 Per builder per month on annual billing ($65 monthly); internal users $15 ($18 monthly). Adds audit logging, rich permissions, portals and external user access.
  • Enterprise Custom Quoted by the vendor. Adds SSO and SCIM, Git source control, unlimited end users and white-labelling.
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What users say

Review Scores · opens after launch

a0.dev

Ease of use
Not rated yet
User interface
Not rated yet
Onboarding
Not rated yet
Support and service
Not rated yet
Value for money
Not rated yet
Features
Not rated yet

No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.

Retool

Ease of use
Not rated yet
User interface
Not rated yet
Onboarding
Not rated yet
Support and service
Not rated yet
Value for money
Not rated yet
Features
Not rated yet

No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.

Where this comes from

Where this comes from

a0.dev https://a0.dev · checked against the official source on 2026-09-02

Retool https://retool.com · no check date recorded yet

This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.