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Average Ratings 0 Ratings

Total 0 out of 5 stars
ease 0 out of 5 stars
features 0 out of 5 stars
design 0 out of 5 stars
support 0 out of 5 stars

No User Reviews. Be the first to provide a review:

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Description

21st is a development platform designed to help engineers quickly build and deploy AI agents inside their applications. The platform provides a specialized SDK that simplifies the process of defining agent behavior, integrating tools, and connecting AI models. Developers can create agents using familiar technologies such as Next.js, React, TypeScript, Python, and Node.js, making integration straightforward for modern applications. Once an agent is defined, the platform allows it to be deployed with a single command while automatically handling infrastructure requirements. 21st provides sandboxed execution environments through E2B sessions, ensuring that agent operations run securely and independently. The platform includes a ready-to-use chat interface component that can be embedded directly into an app for user interaction. Additional features include token streaming, conversation history, tool execution, and built-in observability for debugging and monitoring. Developers can replay sessions and trace tool calls to better understand how agents behave during execution. The system also supports spend limits, authentication controls, and rate limiting to manage AI usage across users. By combining development tools with managed infrastructure, 21st helps teams launch scalable AI agents without building complex backend systems.

Description

Stele serves as a browser-based library tailored for frontend developers, design engineers, and designers who engage with code. With its Chrome extension, users can capture a variety of web-page elements including full pages, screenshots, videos, bookmarks, code snippets, and notes, all organized within a searchable visual workspace. The captures preserve essential elements such as HTML, styles, assets, and design tokens, facilitating the inspection of colors, fonts, spacing, and component specifics after they have been saved. Additionally, the web application features semantic search, tagging capabilities, accessibility and contrast evaluations, and allows for exports in formats like React, HTML, and Tailwind. Users can also integrate AI coding tools via the Model Context Protocol (MCP), which enables them to search through and utilize saved references as contextual information. Moreover, the platform allows for inspiration to be imported from various services such as Pinterest, Dribbble, Behance, X, and Raindrop.io. Stele provides both a complimentary plan and an advanced Pro subscription for users seeking enhanced features. This versatility makes it a valuable resource for those in the design and development fields.

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

Behance No 
Claude No 
Cursor No 
Dribbble No 
Grok Bot Yes 
Model Context Protocol (MCP) No 
Pinterest No 
Raindrop.io No 
React Yes 
Tailwind CSS Yes 
X (Twitter) No 
shadcn/ui Yes 

Integrations

Behance Yes 
Claude Yes 
Cursor Yes 
Dribbble Yes 
Grok Bot No 
Model Context Protocol (MCP) Yes 
Pinterest Yes 
Raindrop.io Yes 
React No 
Tailwind CSS No 
X (Twitter) Yes 
shadcn/ui No 

Pricing Details

Free
Free Trial No 
Free Version Yes 

Pricing Details

$10/month
Pro is $10/month for beta members, with the discounted rate lasting while the subscription remains active. Standard Pro pricing is $15/month billed monthly or $144 billed yearly ($12/month equivalent); subscriptions renew automatically until canceled. The free plan includes 60 captures, 2 GB of storage, one personal space, and 200 AI credits per month. Pro includes 100 GB of storage and 2,000 AI credits per month. Pro has a free trial; a payment method is collected at checkout, and billing starts after the trial unless canceled.
Free Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

21st.dev

Website

21st.dev/

Vendor Details

Company Name

stele.so

Founded

2026

Country

India

Website

stele.so

Product Features

Product Features

Alternatives

Alternatives