Base44 vs AgentUI: Which AI App Builder Is Better?

Base44 vs AgentUI: official product visuals

Base44 vs AgentUI: same job, different commercial model

Both platforms exist to replace the spreadsheet that runs part of your business. You describe the process, the AI builds an application with a database, user accounts and permissions, and your team starts using it. On the core promise there is very little between them, and both did the job in our testing.

Where they diverge is how the vendor expects the relationship to work. Base44 is a product you buy with a credit card and use alone. AgentUI is a product that arrives with a person attached — white-glove onboarding is included on every plan, including the $50 entry tier.

That single difference explains almost everything else. Base44 can afford a free tier because nobody's time is committed when you sign up. AgentUI cannot, because someone will help you build the first thing. Base44 prices by consumption because usage is the cost driver. AgentUI prices by internal seat because staff count predicts support load.

If you are technically confident and cost-sensitive, the Base44 model is obviously better value. If you are a non-technical operations lead whose real constraint is not money but momentum, the AgentUI model buys you something a cheaper tool cannot.

Where your data lives

This is the most practically important technical difference and it is easy to miss. Base44 builds the database as part of the app — the data lives in the application it generated. That is ideal when the process you are replacing lives in a spreadsheet, because there is no existing system to respect.

AgentUI's SQL integration, available from the $100 per month Innovator plan, points the generated tool at a database you already run. For a company whose customer and order data already sits in a warehouse or a production database, that is the difference between a useful tool and another data island that someone has to reconcile.

Ask yourself where the truth currently lives. If the answer is 'a spreadsheet' or 'nowhere, it is in people's heads', Base44's self-contained model is simpler and cheaper. If the answer is 'our database', AgentUI's integration is worth the higher tier on its own.

Side by side

Category winners

In September 2026 we gave both platforms the same internal-tools brief: a staff equipment-booking system with roles, an approval step and a manager dashboard, followed by a second tool reading from an existing SQL database. We measured prompts to a working version, how permissions behaved under deliberate misuse, and what each plan tier actually unlocked. Pricing comes from each vendor's published pricing page checked that month. We did not test AgentUI's Build with You or Enterprise Plus tiers directly; statements about them reflect published terms.

Pricing compared in detail

Base44: free with 25 message credits and 100 integration credits a month across up to five apps; Starter $16 per month billed annually ($20 monthly) with 100 message and 2,000 integration credits, unlimited apps and in-app code edits; Builder $40 annually ($50 monthly) with 250 and 10,000 credits plus GitHub sync and model selection; Pro $80 annually ($100 monthly) with 500 and 20,000; Elite $160 annually ($200 monthly) with 1,200 and 50,000 plus premium support.

AgentUI: free trial, then Minimum $50 per month for five internal users with unlimited external users and white-glove onboarding; Innovator $100 for ten users with SQL integration; Visionary $250 for twenty-five users with SSO, audit logs and unlimited environments; Build with You $2,500 including fifteen dedicated development hours monthly; Enterprise Plus on request with unlimited users and on-premise deployment.

For a team of three building two departmental tools, Base44 Builder at $40 per month billed annually is the sensible plan and AgentUI's $50 minimum is the cheapest comparable option — close, with Base44 ahead once you count the free evaluation period. For a team of twenty, AgentUI's $250 Visionary plan covers everyone at a fixed price while Base44's credit consumption across twenty active builders becomes much harder to forecast.

The credit structure is the thing to watch on Base44. Two pools move independently: prompting burns message credits, and every call your app makes to an outside service burns integration credits. An app that polls an external system on a schedule can drain integration credits while barely touching the message pool. Model that before committing, particularly for automation-heavy tools.

Permissions, governance and passing the IT review

Base44 handles permissions well for its category — accounts, roles and record ownership come as standard, and our booking tool enforced the approval rule correctly once configured. What it does not offer at its price point is the governance layer a larger organisation asks for: single sign-on, audit logging, separate environments for testing and production.

AgentUI puts exactly those features on the Visionary plan, and on-premise deployment behind Enterprise Plus. If your company has a security questionnaire, that list is written to answer it.

There is a middle path worth naming. Plenty of organisations run Base44 for tools that touch no sensitive data — event sign-ups, equipment bookings, internal request forms — and reserve the expensive governed platform for anything touching customer or financial records. Classifying tools by data sensitivity rather than standardising on one vendor is usually the cheaper, saner answer.

Who maintains it in six months

The failure mode for AI-built internal tools is not the build; it is month seven, when the person who prompted it into existence has changed roles and something breaks. Both platforms answer this differently.

Base44 answers it with code access: you own the code, data and users, in-app editing is available on paid plans, and two-way GitHub sync from the Builder plan lets a developer take over properly. If you have any engineering capacity at all, that is a real answer.

AgentUI answers it with people: onboarding on every plan, premium support at higher tiers, and fifteen dedicated development hours a month on Build with You. If you have no engineering capacity, that is a better answer, and it is priced accordingly.

Decide which of those two answers matches your organisation before you compare feature lists, because it predicts satisfaction a year out far better than anything in the tables above.