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

Butterbase is a backend-as-a-service (BaaS) platform purpose-built for developers and non-developers who build apps with AI coding tools. Connect Butterbase to your AI coding tool — Claude Code, Cursor, Windsurf, Codex, Copilot, or any MCP-compatible tool — and your entire backend is provisioned automatically. Describe what you need in natural language and get a production-ready Postgres database, authentication, REST APIs, real-time subscriptions, file storage, and edge functions in seconds. No SQL, no DevOps, no backend experience required.

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

Butterbase is built for vibe coders, solo founders, indie hackers, non-technical builders, and small teams who want to ship full-stack applications without managing infrastructure. If you build frontends with AI coding assistants and need a backend that keeps up, Butterbase is the fastest path from idea to production.

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 Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version Supported
Free Trial Not Supported

Pricing

$0/month
Butterbase offers a free tier to get started with no credit card required. Scale to production with usage-based pricing as your app grows.
Free Version 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:

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Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 4.0 / 5

Pros & Cons from Real Users

Pros

  • honestly I still don't really understand how backend works, but the best part is I don't need to. butterbase just handles it. works so smooth with claude code, feels like magic tbh. had everything up in like 5 mins.

Cons

  • would be cool to have more example projects to look at.

Training

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

Training

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

Company Information

21st.dev
21st.dev/

Company Information

Butterbase
Founded: 2026
United States
butterbase.ai/

Alternatives

Alternatives

Categories

AI SDKs Supported
UI Design Supported

Categories

Integrations

Claude Code Not Supported
Claude Desktop Not Supported
Cline Not Supported
Codex CLI Not Supported
Cursor Not Supported
Devin Desktop Not Supported
GitHub Copilot Not Supported
Grok Bot Supported
Kiro Not Supported
Model Context Protocol (MCP) Not Supported
React Supported
Roo Code Not Supported
TRAE Not Supported
Tailwind CSS Supported
shadcn/ui Supported

Integrations

Claude Code Supported
Claude Desktop Supported
Cline Supported
Codex CLI Supported
Cursor Supported
Devin Desktop Supported
GitHub Copilot Supported
Grok Bot Not Supported
Kiro Supported
Model Context Protocol (MCP) Supported
React Not Supported
Roo Code Supported
TRAE Supported
Tailwind CSS Not Supported
shadcn/ui Not Supported
Claim 21st and update features and information
Claim 21st and update features and information
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