Base44 records 14,039,232 monthly visits with +0.5% month-over-month growth and Freemium, Paid, Contact for Pricing pricing. Janus (now Kairos) records 0 monthly visits with 0% growth and Contact for Pricing pricing.
Build working apps, websites, and AI agents by describing them
Battle-test and harden AI agents before they reach production.
| Dimension / Metric | | |
|---|---|---|
| Official Domain | base44.com | withjanus.com |
| Pricing Model | Freemium, Paid, Contact for Pricing | Contact for Pricing |
| Monthly Visits | 14.04M (14,039,232) | 0 (0) |
| MoM Traffic Delta | +74.64K (+0.5%) | 0 (0%) |
| Primary Market & Share | 🇺🇸 United States (32.1%) | 🌐 Global (—) |
| Direct Visits / mo | 7.82M | 0 |
| User Rating | 4.4 | 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.
Battle-test and harden AI agents before they reach production.
Build bespoke test suites that mirror your real workflows so agents are measured against your rules, not generic benchmarks.
Automatically flag fabricated answers, policy breaches and unsafe outputs before an agent goes live.
Catch broken API calls, malformed arguments and failed agent tool usage that would silently break automations.
Run agents through realistic simulated scenarios to surface weaknesses without exposing real customers or data.
Powerful full-stack app generation from natural language, but offers more polished UI components and smoother deployment flows.
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.
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.
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.
Converts conversational prompts into hosted applications, though with slightly less advanced UI design customizability.
Generates full-stack web apps directly in the browser, though sometimes less structured for enterprise backend scaling.
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.
SpecialistExcels at generating high-quality front-end user interfaces, but requires additional setup for complete full-stack backend integration.
Free / Open-sourceGenAI-native end-to-end QA agent that plans, writes and heals tests in plain language
Instantly builds fully functional web apps with integrated databases and payments, but features fewer advanced customization controls.
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.
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.
Turns conversational prompts into published web and mobile apps, but has fewer enterprise-grade scaling templates.
SpecialistGenerates complete websites quickly from text prompts or screenshots, but lacks advanced dynamic database application features.
SpecialistGenerates complete websites quickly from text prompts or screenshots, but lacks advanced dynamic database application features.
Free / Open-sourceA local, open-source desktop app for building full-stack apps, offering better data privacy but requiring your own API keys.
Free / Open-sourceA local, open-source desktop app for building full-stack apps, offering better data privacy but requiring your own API keys.
