Nimbalyst

Nimbalyst is a workspace for working with Claude Code and Codex alongside project files, tasks and visual editors. It suits people coordinating agent-assisted work across those materials. Its strongest case is bringing sessions and local files together; AI features require a separate subscription or API key.

Overview

Nimbalyst combines parallel agent sessions with a workspace for project materials. Users can search and resume saved sessions and associate them with the files they read or write. That makes it more useful for organizing ongoing agent work than for someone seeking only a diagramming app.

Content and metadata live in plain markdown and other standard files on the local filesystem, and users can choose to sync through GitHub. Nimbalyst says data remains on the device unless users opt into cloud features such as sync, sharing or Teams. The desktop and iOS apps are MIT licensed, with source code on GitHub. Its stated safeguards include SOC 2 Type II auditing, encryption in transit and at rest, access controls, logging and vendor due diligence.

Key features

• Visual editors: Markdown, code, CSV spreadsheets, mockups, Excalidraw diagrams, data models and Mermaid diagrams cover a broad range of project artifacts. Mermaid support and diagram import are included, with Mermaid, Excalidraw and Prisma schema export formats.
• Agent sessions: Running sessions in parallel, then searching and resuming them, helps users keep multiple strands of work organized. Linking sessions to the files they touch gives those interactions useful project context.
• Developer Mode: A Monaco code editor, terminal, visual git management, worktrees and pull request review make this more than a visual planning space for developers who want coding tools alongside agents.
• Providers and connections: Claude Code and Codex are supported. OpenCode and GitHub Copilot are alpha providers, while MCP connections can link services including Linear, GitHub and Slack.
• Team collaboration: Teams enables real-time multiplayer editing for shared documents, mockups, diagrams, trackers and kanban boards. That is a meaningful extension for collaborative work, though it makes the choice of Teams plan and cloud features relevant.
• iPhone companion: The iOS app can monitor sessions, review diffs, resume sessions and send instructions to agents. Android is planned for a future release, so Nimbalyst is not yet a cross-platform mobile choice.

Pricing

Nimbalyst is freemium. The Individual plan costs nothing, has no feature limits and has no trial period. It is a generous starting point for solo users, but it still requires users to bring their own AI subscription or API key; the pricing FAQ also offers local models through LM Studio as an option.

Teams costs $20 a month, billed or $200 / user / year, and adds real-time collaboration and shared docs and trackers to everything in Individual. Teams (annual) costs $200 a year billed and includes the same features. Both Teams plans are Free during Beta. The monthly option suits teams preferring monthly billing; the annual option has a stated yearly price. The per-user terms matter as teams grow, and the Beta offer is not a reason to assume the paid terms will remain free.

Enterprise has custom pricing and includes everything in Teams plus a collaboration server in the customer's cloud or managed by Nimbalyst, data residency and custom editors. It is the relevant tier for organizations needing those deployment and configuration options. No free trial is offered.

Platforms

Nimbalyst supports iOS, Linux, macOS and Windows. The iPhone app handles session monitoring and review tasks, while Android remains planned rather than supported. This platform spread covers major desktop systems, but mobile use currently means iOS.

Who it's for

Nimbalyst is best suited to individuals or teams that work with Claude Code or Codex and want agent sessions connected to files, editors and shared project materials. The local-file approach will appeal to people who want standard files and optional GitHub sync. It is a weaker fit for anyone who needs AI features without bringing separate AI access, needs Android, or wants a focused diagramming tool rather than a broad workspace.

Pros and cons

Pros

• Broad Individual plan: No feature limits at no cost make it possible to use the workspace without first paying Nimbalyst, although AI access is still required separately.
• Local, standard-file storage: Plain markdown and other standard files, with optional GitHub sync, suit users who want project content on their filesystem by default.
• Sessions and artifacts together: Parallel sessions, file links and varied visual editors help keep agent work connected to project materials.
• Real-time shared workspace: Teams collaboration spans documents, mockups, diagrams, trackers and kanban boards rather than just one artifact type.

Cons

• Separate AI access: The free plan does not remove the cost or setup of an AI subscription or API key.
• Paid team seats: Teams is priced per user, making its monthly or annual charge a recurring consideration as collaborators are added.
• No Android app yet: Mobile session control is limited to iOS for now.
• Not a dedicated diagram-only choice: Its breadth is useful for agent workflows, but readers seeking just diagramming may prefer a more focused alternative.

Alternatives

For a directory of diagramming choices, browse AI Diagram Generators.

Creately is a better fit for readers prioritizing canvases and collaborators: its free plan offers unlimited canvases and collaborators, capped at 45 items per canvas.

OpenCharts suits someone looking for a diagramming-oriented free tier with 500K AI credits, one of each project type, one Code Canvas project, 10 GB Drive storage and all export formats.

ArchitectureDiagram.ai is a more targeted option for architecture diagrams; its free plan allows two diagrams per month with watermarked exports.

Archway suits readers seeking AI diagram generations on a free tier, which allows five per month and three diagrams across all seven diagram types, with PNG and SVG export.

Eraser is an alternative for a small number of files and AI diagrams: its free plan includes three files, three AI diagrams, seven-day version history and unlimited guests.

LetDraw is another free option for a small shared diagramming workspace, with three documents, one workspace, five comments per document and three AI prompts.

Mermaid Chart is worth considering when Mermaid diagrams are the main need: its free Basic plan allows three diagrams, limited AI and one team and project.

sysdraw suits a web-only diagramming workflow with a free allowance of 10 scenes, five AI generations per month and PNG export.

Verdict

Choose Nimbalyst if you work with Claude Code or Codex and want agent sessions, project files and collaborative editors in one workspace, with local storage as the default. Its no-feature-limit Individual plan is a strong entry point, but you must bring AI access, and teams should weigh the per-user charge before relying on the Beta offer. Look elsewhere if you need Android or only want a dedicated diagramming app.