21st

21st

21st.dev
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About

21st is a developer platform that provides the fastest way to add AI agents directly into applications. The platform offers an SDK that allows developers to define, deploy, and run AI agents with minimal infrastructure setup. Developers can integrate agents using popular frameworks such as Next.js, React, TypeScript, Python, and Node.js. 21st includes built-in features like chat interfaces, session history, tool execution, memory, and real-time streaming responses. The platform also manages backend components such as sandboxed execution environments, authentication, rate limits, and observability. With support for Claude Code and Codex runtimes, developers can build agents that interact with tools, files, and APIs securely. By handling infrastructure and deployment automatically, 21st enables teams to launch production-ready AI agents quickly.

About

Modern MERN is a comprehensive Node.js SaaS boilerplate designed to accelerate the development of SaaS products by providing a robust foundation built with the MERN stack, MongoDB, Express.js, React, and Node.js. It incorporates modern technologies such as Next.js, TypeScript, Tailwind CSS, Prisma, and Serverless architecture on AWS, ensuring scalability and maintainability. The boilerplate includes essential features like authentication (supporting email/password, Google, Facebook, Apple, and Amazon logins), multi-tenancy with team management, subscription payments via Stripe integration, and an admin dashboard for efficient user and team oversight. Developers benefit from a clean code architecture adhering to solid principles, pre-built responsive UI components, multi-theme support, and a mobile-first design approach. The platform emphasizes high-quality code standards, incorporating tools like ESLint, Prettier, Husky, and TypeScript, alongside comprehensive testing.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Software developers, startups, and product teams that want a fast and scalable way to build and deploy AI agents inside their applications

Audience

Companies and teams in need of a solution to swiftly build and manage their full-stack SaaS applications

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version Supported
Free Trial Not Supported

Pricing

$699 per project
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

21st.dev
21st.dev/

Company Information

Modern MERN
modernmern.com

Alternatives

Alternatives

Categories

AI SDKs Supported
UI Design Supported

Categories

SaaS Boilerplates Supported

Integrations

React Supported
Tailwind CSS Supported
Cypress Not Supported
ESLint Not Supported
Express Not Supported
Facebook Not Supported
Git Not Supported
GitHub Not Supported
Google Not Supported
Grok Bot Supported
Husky Not Supported
Jest Not Supported
MongoDB Not Supported
Next.js Not Supported
Node.js Not Supported
Serverless Not Supported
Stripe Not Supported
TypeScript Not Supported
Visual Studio Code Not Supported
shadcn/ui Supported

Integrations

React Supported
Tailwind CSS Supported
Cypress Supported
ESLint Supported
Express Supported
Facebook Supported
Git Supported
GitHub Supported
Google Supported
Grok Bot Not Supported
Husky Supported
Jest Supported
MongoDB Supported
Next.js Supported
Node.js Supported
Serverless Supported
Stripe Supported
TypeScript Supported
Visual Studio Code Supported
shadcn/ui Not Supported
Claim 21st and update features and information
Claim 21st and update features and information
Claim Modern MERN and update features and information
Claim Modern MERN and update features and information