Subspace AI

Free

Discover Subspace AI, its features, pricing, and use cases. Learn how this AI-powered tool helps developers manage workflows and agents efficiently.

Workflow ProductivityFreeFree tier

Inputs: text, fileOutputs: text, code

Type

Saas

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About Subspace AI

Subspace is a desktop application for macOS (M1+) designed as an agent-first workspace for developers who work with multiple AI coding and CLI agents. Rather than being a chat interface or an IDE, Subspace provides a unified environment where agents like Claude Code, Codex, OpenCode, Gemini, Cursor, Copilot, and others can run side by side in real terminals. The app groups agents, terminals, docs, files, a browser, and git into persistent workspaces that survive restarts, enabling sub-100ms switching between tools. Subspace emphasizes keyboard-first navigation and is optimized for users running three to ten agents simultaneously.

A core feature of Subspace is its cross-agent memory system. As users interact with agents, Subspace automatically compresses conversation turns into token-efficient observations tagged with structured metadata (e.g., decisions, blockers, progress). Every few turns, a status update synthesizes recent work into a coherent summary. This memory is workspace-specific, persists across sessions, and can be searched by text, tag, workspace, or timeline. When a new session begins—even with a different agent—the accumulated context is already available, eliminating the need to re-explain the codebase. The app also backfills memory from recent agent sessions when first pointing it at a project.

Subspace is currently available as a free download, with a free plan that advertises unlimited memory. Installation is quick (approximately three minutes). The tool is positioned for developers already working in an agent-first manner, providing a lightweight complement to existing code editors and terminals. Cross-platform support (Windows) is noted as upcoming via a notification signup. As an early-stage product, some features and long-term pricing may evolve.

Key Features

Cross-agent memory that persists across sessions and agents, automatically capturing observations, status updates, and decision logs

Support for multiple CLI agents running side by side, including Claude Code, Codex, OpenCode, Gemini, Cursor, Copilot, and others

Workspace-based organization grouping agents, terminals, docs, files, browser, and git in one window

Keyboard-first interface with sub-100ms switching between tools and workspaces

Memory searchable by text, tag, workspace, or timeline, accessible mid-session

Automatic memory backfill from recent agent sessions when first adding a project

Pros & Cons

Pros

Cross-agent memory appears to be unlimited on the current free plan, reducing redundant context-setting
Supports a wide range of popular CLI agents, allowing users to choose the best tool for each task
Lightweight and fast, built for developers who run many agents simultaneously
Workspace persistence helps maintain project coherence across sessions and machines
Memory is automatically built and searchable, requiring minimal manual effort

Cons

Currently Mac-only with M1+ processor requirement; Windows support is listed as upcoming but not yet available
Requires installation and is not a web-based tool, limiting accessibility
Free plan may have future limitations or introduce paid tiers that are not yet announced
Limited to CLI-based agents; does not directly support non-CLI AI tools or graphical agent interfaces
Memory effectiveness depends on automatic compression and tagging, which may not capture all nuances; manual verification may still be needed

Best For

Developers managing complex codebases with multiple AI agents to avoid re-explaining contextRunning different agents for different tasks (e.g., Claude Code for architecture, Codex for implementation) within a single workspaceMaintaining coherent project understanding across days of agent-driven developmentCollaborating with team members who share a codebase by leveraging persistent workspace memoryDebugging and iterating on code with continuous context available to every new agent session

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FAQ

Is Subspace free to use?

Based on the current website information, Subspace offers a free plan with unlimited memory. No paid plans are mentioned at this time, but future pricing changes should be verified on the official site.

Which agents are supported?

Subspace works with multiple CLI agents including Claude Code, Codex, OpenCode, Gemini, Cursor, Copilot, and Amp, among others. The list appears to expand regularly.

Does Subspace work on Windows or Linux?

Currently, Subspace is a macOS app requiring Apple Silicon (M1+). A Windows version is listed as coming soon, and users can sign up for notification. Linux support is not mentioned.

How does the memory system work?

Subspace automatically compresses each agent conversation turn into token-efficient observations tagged with structured tags (decisions, blockers, progress). Every few turns, a status update synthesizes recent work. Memory persists across sessions and can be searched by text, tag, workspace, or timeline.

Can I use Subspace with my existing code editor?

Yes. Subspace is designed to complement existing tools—it is not a replacement for a code editor. It provides a workspace for agents, terminals, docs, files, browser, and git alongside your usual development environment.

How long does it take to install?

The website states installation takes approximately three minutes. The app can be downloaded from subspace.build and pointed at a project folder to begin generating memory.