PromptUI vs Base44 — AI app builders compared
Base44, now part of Wix, builds apps from plain language on top of a backend it owns entirely — database with row-level security, authentication, transactional email, file storage and image generation all work with no external account and no API key, on every plan. That covers the whole stack an app needs without a single external account, and it is the main reason to choose it. PromptUI takes a different position: it connects your own services, shows you the evidence that a build actually runs, and does not bill you for attempts that fail.
Last reviewed: 2026-08-31
Time-sensitive competitor facts are based on current official documentation:
Key differences
- →Base44 owns the whole stack it generates — database, auth, email, storage and hosting with no keys from you. PromptUI connects your own Supabase or Clerk.
- →PromptUI publishes per-build evidence: validator, preview, runtime and visual checks, visible on the build page.
- →PromptUI does not charge for a failed build. Base44 publishes that credits are non-refundable for tool behaviour and AI mistakes, though it does make automatic error fixes free on paid plans.
- →Base44 exports a real React codebase, but its data model stays on Base44 and the frontend is a client for their backend.
PromptUI strengths
- ✓Per-build evidence you can inspect before you ship, and plain language when something did not pass.
- ✓Failed builds are refunded automatically.
- ✓You hold your own service accounts and keys, so the app is not tied to one vendor backend.
- ✓Growth Agent drafts launch content from the same build context.
Base44 strengths
- ✓A genuinely complete managed backend: database with row-level security, email and password plus Google, Microsoft and Facebook sign-in, transactional email, file storage, image generation and LLM calls — all with no API key, on every plan including free.
- ✓A well-modelled auth system, not a mock: an immutable built-in user entity, service-role separation, custom roles, three visibility tiers and enterprise SSO.
- ✓Standard, non-exotic output — React with Vite and Tailwind, real routes, TypeScript backend functions, and two-way GitHub sync from the Builder plan up.
- ✓In-app AI agents that are a real product: tool selection, persistent memory, OAuth connectors, and WhatsApp, Telegram and LINE channels.
- ✓Honest cost-control affordances — free preview and testing, free database reads and writes, free manual visual edits, and free automatic error fixes on paid plans.
- ✓Backed by Wix, and shipping at a near-daily cadence.
Verdict
Choose Base44 if you want the app to work end to end with no accounts to create and no keys to paste — its managed backend covers database, auth, email and storage with nothing to sign up for, and its in-app agents carry memory and messaging channels. Choose PromptUI if you would rather own the services your product depends on, see the checks a build passed before shipping it, and not pay for attempts that fail. The real question is ownership: Base44 gives you a whole stack with nothing to set up, and holds it; PromptUI gives you a build that runs on accounts you control.
Feature comparison
| Feature | PromptUI | Base44 |
|---|---|---|
| Database, auth and email with no keys from you | Not yetBring your own Supabase, Clerk or email provider | Live-provenIncluded on every plan, free tier included |
| Row-level security on your data | Needs proofPrompt-guided scaffolding, not independently verified | Live-proven |
| Per-build evidence the app actually runs | Live-provenValidator, preview, runtime and visual signals persisted per build | Needs proofDo not claim absence without current public evidence |
| Refunds credits for a failed build | Live-proven | Not yetCredits are non-refundable for tool behaviour and AI mistakes; automatic error fixes are free on paid plans |
| Export a codebase you can run elsewhere | Live-provenStandard React or Next.js on your own services | Different focusReal React export, but the data model stays on Base44 and the frontend is a client for their backend |
| Code export on the free plan | Live-proven | Not yetGitHub sync requires the Builder plan or higher |
| In-app AI agents with memory and channels | Not yet | Live-provenPersistent memory, OAuth connectors, WhatsApp, Telegram and LINE |
| Private apps on the free plan | Live-proven | Not yetFree plan apps are public, and capped at five |
| Build to launch-campaign loop | Shipped in codeGrowth Agent drafts from the same build context | Needs proof |
"Live-proven" = confirmed working in production. "Shipped in code" = built but not yet fully deployed. "Different focus" = the product positions that workflow differently. "Needs proof" = do not treat as a hard gap without fresh evidence. "Not yet" = not available as of this writing.
FAQ
What does Base44 do that PromptUI does not?
Base44 provides the entire backend an app needs — database with row-level security, authentication, transactional email, file storage and image generation — with no external account and no API key, on every plan. PromptUI scaffolds the same kinds of integration but connects your own services.
Do I own the code either way?
With PromptUI you get a standard React or Next.js app running on services you control. Base44 also exports a real React codebase with two-way GitHub sync from the Builder plan up, but its data model stays on Base44 and the exported frontend is a client for their backend, so moving off the platform means rebuilding the backend.
Do I pay for a generation that goes wrong?
Not with PromptUI — failed builds are refunded automatically. Base44 publishes that credits are non-refundable for tool behaviour and AI mistakes, although on paid plans its automatic error fixes are free.
Which should I choose if I never want to create another account?
Base44. Its no-keys-required backend covers database, auth, email, storage and image generation on every plan, and that is the strongest reason to pick it.