Powerful full-stack app generation from natural language, but offers more polished UI components and smoother deployment flows.
#1Base44 records 14,039,232 monthly visits with +0.5% month-over-month growth and Freemium, Paid, Contact for Pricing pricing. Koolay records 358 monthly visits with -75% growth and Freemium pricing.

The operating system nonprofits run on — donors, grants, events and e-sign in one place
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | base44.com | koolay.com |
| Pricing Model | Freemium, Paid, Contact for Pricing | Freemium |
| Monthly Visits | 14.04M (14,039,232) | 358 (358) |
| MoM Traffic Delta |
| +74.64K (+0.5%) |
| -1.08K (-75%) |
| Primary Market & Share | 🇺🇸 United States (32.1%) | 🌐 Global (—) |
|---|
| Direct Visits / mo | 7.82M | 142 |
|---|
| User Rating | 4.4 | 4 |
|---|
| Supported Platforms | Website | Website |
|---|

Build working apps, websites, and AI agents by describing them
Describe an idea and get a working app with database, authentication, payments, and hosting already wired up — no server or infrastructure setup.
Generates complete websites with layout, copy, and design, plus built-in SEO tools and custom domain support, ready to publish in one click.
Create 24/7 AI agents that connect to your tools, take real actions, manage data, and automate recurring workflows autonomously.
Connects to Google Calendar, Gmail, Slack, Notion, HubSpot, Salesforce, and more, with API access for anything else you use.

The operating system nonprofits run on — donors, grants, events and e-sign in one place
EIN-matched grant search across 30K+ live opportunities, 1.9M nonprofits and 184K funders, with 990-PF funder dossiers and Why-GO scoring.
An AI grant writer grounded in your mission, budgets and past applications, plus a Kanban pipeline with deadline alerts and version history.
Donor CRM with lifetime value, segments, recurring giving and automatic receipts living beside donation pages and events.
A website/CMS, events, email, finance and e-signature tools running on one modern data model instead of a stitched stack.
Powerful full-stack app generation from natural language, but offers more polished UI components and smoother deployment flows.
#1
SpecialistAn AI-native code editor offering deeper multi-file control, but demands more developer experience than zero-code platforms.

Provides a robust cloud development environment with agentic coding, but requires more manual coding oversight than pure no-code.
Converts conversational prompts into hosted applications, though with slightly less advanced UI design customizability.

The pro website builder with a design agent on a fully editable canvas
Generates full-stack web apps directly in the browser, though sometimes less structured for enterprise backend scaling.
SpecialistExcels at generating high-quality front-end user interfaces, but requires additional setup for complete full-stack backend integration.

Instantly builds fully functional web apps with integrated databases and payments, but features fewer advanced customization controls.

SpecialistTransforms spreadsheets into interactive business apps easily, but lacks the raw code generation flexibility of full-stack AI builders.
Turns conversational prompts into published web and mobile apps, but has fewer enterprise-grade scaling templates.

AI website builder that designs, hosts, and runs your whole site
AI website builder that turns a chat prompt into a launched business site
Powerful full-stack app generation from natural language, but offers more polished UI components and smoother deployment flows.
SpecialistAn AI-native code editor offering deeper multi-file control, but demands more developer experience than zero-code platforms.
Provides a robust cloud development environment with agentic coding, but requires more manual coding oversight than pure no-code.
Converts conversational prompts into hosted applications, though with slightly less advanced UI design customizability.
The pro website builder with a design agent on a fully editable canvas
Generates full-stack web apps directly in the browser, though sometimes less structured for enterprise backend scaling.
SpecialistExcels at generating high-quality front-end user interfaces, but requires additional setup for complete full-stack backend integration.
Instantly builds fully functional web apps with integrated databases and payments, but features fewer advanced customization controls.
SpecialistTransforms spreadsheets into interactive business apps easily, but lacks the raw code generation flexibility of full-stack AI builders.
Turns conversational prompts into published web and mobile apps, but has fewer enterprise-grade scaling templates.
AI website builder that designs, hosts, and runs your whole site
AI website builder that turns a chat prompt into a launched business site