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What is Subspace?

Subspace is a groundbreaking environment designed for AI-native agents, aimed at assisting developers and teams in managing, coordinating, and collaborating with various coding agents in a unified setting that preserves context across multiple sessions. Instead of treating each engagement with AI as an isolated occurrence, this platform fosters a continuous memory system that encapsulates every interaction into organized insights, detailing choices, challenges, and progress, which are regularly updated to mirror the project's dynamic nature. This collective memory is linked to the entire workspace rather than tied to individual tools, allowing various agents, including Claude Code, Codex, and others, to effortlessly pick up where previous sessions left off without requiring redundant explanations or manual context adjustments. Users of Subspace can seamlessly incorporate terminals, files, documentation, browser views, and git workflows into structured workspaces, enabling the simultaneous use of multiple agents while facilitating quick shifts between different projects. This all-encompassing strategy not only boosts productivity and collaboration but also transforms the development landscape into a more streamlined and efficient process, ultimately leading to better outcomes for teams. By leveraging this innovative platform, developers can enhance their workflow and significantly reduce the time spent on repetitive tasks.

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.

Media

Media

Integrations Supported

Amp
Ansible
ChatGPT
Claude Code
Codex CLI
Cursor
Devin
Gemini
GitHub Copilot
Grok
Kiro
OpenClaw
OpenCode
Perplexity
React
Tailwind CSS
shadcn/ui

Integrations Supported

Amp
Ansible
ChatGPT
Claude Code
Codex CLI
Cursor
Devin
Gemini
GitHub Copilot
Grok
Kiro
OpenClaw
OpenCode
Perplexity
React
Tailwind CSS
shadcn/ui

API Availability

Has API

API Availability

Has API

Pricing Information

$12 per month
Free Trial Offered?
Free Version

Pricing Information

Free
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Subspace

Company Location

United States

Company Website

www.subspace.build/

Company Facts

Organization Name

21st.dev

Company Website

21st.dev/

Categories and Features

Categories and Features

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