Side by side
| PICK | PRICE OR LIMIT | VERDICT | NEED |
|---|---|---|---|
| Bubble | Starter USD 59 a month billed annually, 175K workload units | Start here for a real product | One project for web, iOS and Android |
| Replit | Core USD 20 a month (USD 18 billed annually) | Best if you may hire a developer later | An AI agent that writes the code and publishes it |
| FlutterFlow | Basic USD 39 a month with code download and one-click store deployment | Best for app store launches | A native app you can download as source code |
| Glide | Basic USD 25 a month for 2 published apps | Best for operations teams | An internal app for your team from a spreadsheet |
| Lovable | Pro USD 25 a month for 100 credits | Best first prototype | A working web app in an afternoon |
| Base44 | Paid plans from USD 16 a month billed annually | Best budget pick | The smallest monthly bill |
Our picks in detail
Bubble
The most complete builder for apps you will run long term
- Best for: founders building a customer-facing product that needs a web app plus App Store and Google Play releases.
- Main limitation: apps run on Bubble's platform, and Bubble's own FAQ contrasts its visual apps with builders that generate code, so plan to stay.
Bubble Starter cost USD 59 a month billed annually and included 5 mobile build submissions a month, according to Bubble's pricing page checked 18 October 2026.
Replit
Most flexible; pay for Core before you publish anything lasting
- Best for: people who want an AI agent to build a full-stack web or mobile app and keep real code they can hand to a developer.
- Main limitation: the free Starter plan allows one published app with a "Made with Replit" badge, and its link goes down after 30 days.
Replit Core cost USD 20 a month, or USD 18 billed annually, according to Replit's pricing page checked 18 October 2026.
FlutterFlow
Best code ownership for app store releases
- Best for: mobile-first apps headed for the App Store and Google Play, where owning the source code matters.
- Main limitation: the Free plan allows 2 projects and 5 AI generation requests in total, and adds a watermark.
FlutterFlow Basic cost USD 39 a month and included code download and 50 AI requests a month, according to FlutterFlow's pricing page checked 18 October 2026.
Glide
Fastest internal tool; the Free plan cannot publish
- Best for: operations, sales and field teams turning a spreadsheet, a prompt or a file into an internal business app.
- Main limitation: Glide's publishing documentation says the Free plan does not support publishing apps, so you pay before anyone else can use what you built.
Glide's Free plan could not publish apps, and Basic cost USD 25 a month for 2 published apps, according to Glide's pricing page checked 18 October 2026.
Lovable
Quickest web app, but no native mobile build
- Best for: a founder or marketer who wants a hosted web app with sign-up and a database, built from plain-English prompts.
- Main limitation: Lovable builds web applications, not native iOS or Android apps, and Free accounts cannot download code or use a custom domain.
Lovable Pro cost USD 25 a month for 100 credits, according to Lovable's plans documentation checked 18 October 2026.
Base44
Cheapest paid plan; a tight free allowance
- Best for: solo builders who want an all-in-one app with hosting, logins and a database at the lowest paid price.
- Main limitation: the Free plan allows 5 messages a day and 25 a month, and app store releases still go through your own Apple and Google developer accounts.
Base44's paid plans started at USD 16 a month billed annually, according to Base44's pricing page checked 18 October 2026.
Reviewed 1 November 2026 against Bubble, Replit, FlutterFlow, Glide, Lovable and Base44 documentation and pricing pages.
Our pick
Bubble wins because it covers the whole life of an app, not just the first draft. Its AI app builder page says it builds "true native iOS and Android apps" on React Native and publishes them to the App Store and Google Play from inside Bubble, while the same project also runs as a web app on a shared database and backend. Bubble's pricing page lists a Free plan with 50K workload units a month for building and testing, and Starter at USD 59 a month billed annually, which adds a live website, a custom domain and 5 mobile build submissions a month. The trade-off is that you build inside Bubble's visual editor rather than getting a code base you can take elsewhere.
App builder, vibe coding tool or website builder?
These three categories overlap, so pick by what you are shipping:
- An app with users, data and mobile releases: an AI app builder from this page. Bubble, Replit and FlutterFlow publish to app stores; Glide covers internal tools.
- A quick web app from prompts, with the code in your hands: a vibe coding tool. Our vibe coding tools ranking covers Lovable, Bolt, v0 and Replit for that job.
- A marketing site, portfolio or online store: an AI website builder. The best AI website builders guide compares Squarespace, Wix and Framer.
- Code you write and review yourself: a coding assistant from our AI coding tools ranking.
How usage is metered
The plan price is only the floor. Each builder counts AI and hosting use in its own unit:
- Workload units (Bubble): a single measure of the server work your app does. Bubble emails you at 75% and 100% of your allowance; paid plans can buy workload tiers or pay overages, and you can switch overages off.
- Credits and messages (Glide, Lovable, Base44): each AI request or build step uses credits. Glide Basic includes 100 credits a month, Lovable Pro 100 credits plus 5 daily credits, and Base44 Free 25 messages a month.
- AI requests (FlutterFlow): 50 a month on Basic and 200 on Growth.
- Dollars of model usage (Replit): Core includes USD 20 a month toward more powerful models, with lighter work in Free Mode.
Security and data are still your job
An app that looks finished can still expose its database. The US National Vulnerability Database lists CVE-2025-48757, which describes insufficient row-level security policies in sites generated by Lovable through 15 April 2025 that let unauthenticated attackers read or write database tables. Lovable disputes the entry and says each customer is responsible for protecting their app's data, which is exactly the point: the builder will not check your access rules for you. Veracode's 2025 GenAI Code Security Report found security flaws in 45% of AI-generated code across more than 100 models.
The NVD entry CVE-2025-48757, published 29 May 2025, describes database tables exposed by weak row-level security in apps generated by Lovable, a finding Lovable disputes.
Before real users sign up:
- Test access with two accounts. Confirm neither user can open the other's records.
- Check training settings. Replit uses content for model improvement by default, with an opt-out on Pro, according to its model improvement policy; Lovable Business excludes data by default. Our AI tool privacy checklist lists what else to check.
- Keep keys out of prompts. Store API keys in the builder's secrets settings.
- Read the store rules early. Apple and Google review every release, so leave time before a launch date.
How we picked
- We compared what each builder produces from a prompt (web, native mobile or internal app), free and paid plan limits, how usage is metered, publishing and custom domain rules, code export and Git sync, and training settings, as listed on each vendor's pricing and documentation pages on 18 October 2026. Tools that take a non-developer from idea to a published app on more devices rank higher. Our ranking method explains how documented limits shape each verdict.
How to choose
How to choose
- Write the brief: who uses the app, on which devices, the three screens it needs and the data it stores.
- Pick two builders that match the devices: Bubble and FlutterFlow for app stores, Glide and Base44 for internal or simple apps.
- Build the same first version on both free plans and add one login and one data field.
- Record the usage each change consumed.
- Price the launch plan, including custom domain and store submissions.
- Upgrade one tool only, and test access rules before you invite users.
Small teams building internal tools should also read our AI tools for small business guide, and developers comparing agents can start with the AI tools for developers guide. If you are still choosing free tools for the rest of your work, see the best free AI tools for each job.
Questions people ask
What is the best AI app builder?
For most products, Bubble: a single project gives you a web app plus native iOS and Android apps. Its Starter plan is USD 59 a month on annual billing.
Is there a free AI app builder?
Yes, all six have a free plan, but most limit publishing. Glide's Free plan cannot publish apps, and Replit's free published app goes offline after 30 days.
Can an AI app builder make an iPhone app?
Yes. Bubble, Replit and FlutterFlow document native iOS builds and App Store submission; Lovable builds web apps only.
Can I export the code from an AI app builder?
It depends on the tool. FlutterFlow Basic includes code download, Lovable syncs to GitHub on every plan, and Bubble apps stay on Bubble's platform.
What is the difference between an AI app builder and a vibe coding tool?
App builders focus on finished apps with users, data and store releases; vibe coding tools generate code from prompts for quick web apps. Replit and Lovable sit in both groups.
Which AI app builder is cheapest?
Base44, with paid plans from USD 16 a month billed annually. Replit Core is USD 18 a month billed annually.
Are apps built with AI secure?
Not automatically. Veracode found flaws in 45% of AI-generated code samples, so test who can see which records before launch.
Sources
- [1]AI app builder page bubble.io · 1 Nov 2026
- [2]Bubble's pricing page bubble.io · 1 Nov 2026
- [3]Replit's pricing page replit.com · 1 Nov 2026
- [4]Replit's mobile app guide docs.replit.com · 1 Nov 2026
- [5]FlutterFlow's pricing page flutterflow.io · 1 Nov 2026
- [6]Glide's publishing documentation glideapps.com · 1 Nov 2026
- [7]Glide's pricing page glideapps.com · 1 Nov 2026
- [8]Lovable's plans documentation docs.lovable.dev · 1 Nov 2026
- [9]Base44's pricing page base44.com · 1 Nov 2026
- [10]CVE-2025-48757 nvd.nist.gov · 1 Nov 2026
- [11]2025 GenAI Code Security Report veracode.com · 1 Nov 2026
- [12]model improvement policy docs.replit.com · 1 Nov 2026