What is 21st?
21st is a developer-focused platform designed to simplify the creation and deployment of AI agents within modern software applications. The platform provides an SDK that allows developers to define agents using simple code while integrating tools, prompts, and AI models. It supports multiple development environments and frameworks including Next.js, React, TypeScript, Python, Node.js, and other common programming stacks. Developers can configure agents to run on advanced runtimes such as Claude Code or Codex, enabling tool usage, file access, and intelligent task execution. Once the agent configuration is defined, deployment can be completed using a single command that automatically sets up infrastructure. The platform manages backend systems such as sandboxed execution environments, authentication, rate limits, and streaming responses. It also includes a drop-in chat interface component that developers can embed directly into their applications to enable user interaction with agents. Real-time token streaming allows users to see responses generated progressively, creating a more interactive experience. The platform provides built-in observability tools that allow developers to monitor conversations, replay sessions, and trace agent actions. These features make debugging and optimization much easier during development and production. 21st also includes usage controls such as per-user spending limits, quotas, and metering to help manage AI costs. By combining powerful developer tools with managed infrastructure and deployment capabilities, 21st makes it easier for teams to build and scale AI-powered agents within their products.
Pricing
Price Starts At:
Free
Free Version:
Free Version available.
Integrations
Similar Software to 21st
Apify
Apify offers a comprehensive platform for web scraping, browser automation, and data extraction at scale. The platform combines managed cloud infrastructure with a marketplace of over 10,000 ready-to-use automation tools called Actors, making it suitable for both developers building custom solutions and business users seeking turnkey data collection.
Actors are serverless cloud programs that handle the technical complexities of modern web scraping: proxy rotation, CAPTCHA solving, JavaScript rendering, and headless browser management. Users can deploy pre-built Actors for popular use cases like scraping Amazon product data, extracting Google Maps listings, collecting social media content, or monitoring competitor pricing. For specialized needs, developers can build custom Actors using JavaScript, Python, or Crawlee, Apify's open-source web crawling library.
The platform operates a developer marketplace where programmers publish and monetize their automation tools. Apify manages infrastructure, usage tracking, and monthly payouts, creating a revenue stream for thousands of active contributors.
Enterprise features include 99.95% uptime SLA, SOC2 Type II certification, and full GDPR and CCPA compliance. The platform integrates with workflow automation tools like Zapier, Make, and n8n, supports LangChain for AI applications, and provides an MCP server that allows AI assistants to dynamically discover and execute Actors.
Learn more
Gemini Enterprise Agent Platform
Gemini Enterprise Agent Platform is an advanced AI infrastructure from Google Cloud that enables organizations to build and manage intelligent agents at scale. As the evolution of Vertex AI, it consolidates model development, agent creation, and deployment into a unified platform. The system provides access to a diverse library of over 200 AI models, including cutting-edge Gemini models and leading third-party solutions. It supports both low-code and full-code development, giving teams flexibility in how they design and deploy agents. With capabilities like Agent Runtime, organizations can run high-performance agents that handle long-duration tasks and complex workflows. The Memory Bank feature allows agents to retain long-term context, improving personalization and decision-making. Security is a core focus, with tools like Agent Identity, Registry, and Gateway ensuring compliance, traceability, and controlled access. The platform also integrates seamlessly with enterprise systems, enabling agents to connect with data sources, applications, and operational tools. Real-time monitoring and observability features provide visibility into agent reasoning and execution. Simulation and evaluation tools allow teams to test and refine agents before and after deployment. Automated optimization further enhances agent performance by identifying issues and suggesting improvements. The platform supports multi-agent orchestration, enabling agents to collaborate and complete complex tasks efficiently. Overall, it transforms AI from a productivity tool into a fully autonomous operational capability for modern enterprises.
Learn more
mcp-use
MCP-Use is an open-source platform aimed at developers, offering a comprehensive suite of SDKs, cloud infrastructure, and a user-friendly control interface to aid in the development, management, and deployment of AI agents based on the Model Context Protocol (MCP). This platform supports connections to multiple MCP servers, each providing unique tool capabilities such as web browsing, file management, and specialized third-party integrations, all conveniently accessed through a singular MCPClient. Developers can create tailored agents (via MCPAgent) capable of intelligently selecting the most appropriate server for individual tasks by utilizing configurable pipelines or a built-in server management system. It simplifies essential processes including authentication, access control management, audit logging, observability, and the establishment of sandboxed runtime environments, ensuring that both self-hosted and managed MCP applications are ready for production. Additionally, MCP-Use enhances the developer experience by seamlessly integrating with popular frameworks like LangChain (Python) and LangChain.js (TypeScript), which accelerates the creation of AI agents equipped with a variety of tools. Furthermore, its intuitive architecture not only fosters creativity but also encourages developers to explore and innovate with new AI capabilities more effectively, ultimately driving the advancement of AI technology.
Learn more
VideoDB
VideoDB functions as a sophisticated backend solution for AI agents, enabling them to analyze, understand, and react to audio and video content in real time. It serves as a bridge between raw media streams and the reasoning abilities of agents, converting live streams into well-structured, searchable contextual data accompanied by actionable insights.
Our integrated See->Understand->Act methodology eliminates the reliance on a fragmented assortment of tools like FFmpeg, vector databases, and transcription services by providing a unified, programmable media framework. The cutting-edge "Indexes-as-code" capability allows developers to extract insights from both spoken language and visual aspects with nearly instant response times.
With support for Python and Node.js SDKs, VideoDB seamlessly connects with platforms such as Claude, Cursor, and Codex via the Model Context Protocol (MCP). Its design emphasizes streaming, ensuring that agents maintain a constant awareness of their surroundings rather than depending exclusively on static files.
Whether utilized for creating an AI meeting assistant, improving camera intelligence, or streamlining automated media editing, VideoDB provides the crucial perception framework needed for a wide range of applications. Consequently, it greatly enhances the performance of AI agents, enabling them to work more efficiently and responsively within ever-changing environments. This transformative capability positions VideoDB as an essential tool for developers looking to harness the full potential of AI in multimedia applications.
Learn more
Screenshots and Video
Company Facts
Company Name:
21st.dev
Company Website:
21st.dev/
Product Details
Deployment
SaaS
Training Options
Documentation Hub
Support
Web-Based Support
Product Details
Target Company Sizes
Individual
1-10
11-50
51-200
201-500
501-1000
1001-5000
5001-10000
10001+
Target Organization Types
Mid Size Business
Small Business
Enterprise
Freelance
Nonprofit
Government
Startup
Supported Languages
English