Offers an expansive infinite canvas for team brainstorming and visual workshops, but lacks Eraser's code-to-diagram automation.
#1CopilotKit records 403,148 monthly visits with +199.4% month-over-month growth and Freemium pricing. Eraser records 534,396 monthly visits with -23.6% growth and Freemium, Paid, Contact for Pricing pricing.

Open-source frontend stack for building AI agents and copilots inside your own product
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | copilotkit.ai | eraser.io |
| Pricing Model | Freemium | Freemium, Paid, Contact for Pricing |
| Monthly Visits | 403.15K (403,148) | 534.4K (534,396) |
| MoM Traffic Delta |
| +268.49K (+199.4%) |
| -164.9K (-23.6%) |
| Primary Market & Share | 🇺🇸 United States (18.9%) | 🇮🇳 India (39.6%) |
|---|
| Direct Visits / mo | 179.26K | 267.66K |
|---|
| User Rating | 4.6 | 4.6 |
|---|
| Supported Platforms | Website | Website |
|---|

Open-source frontend stack for building AI agents and copilots inside your own product
Ship a working copilot UI in minutes with drop-in components for React, Angular, Vue, iOS, and Android, or go fully headless for total control over rendering.
A general-purpose bi-directional link between your app and any agent backend, with integrations for the OpenAI Agents SDK, Claude Agent SDK, LangChain, Google ADK, AWS Strands, Mastra, and many more.
Agents return real UI — charts, forms, tables, and approval prompts rendered with your own design system on the same screen the user is already working in.
Let agents read and write application state, call your frontend functions, and pause for human approval before sensitive actions are executed.
AI diagrams and technical design docs built from your code and systems
Generate architecture diagrams, flowcharts, sequence diagrams, and BPMN from a text prompt, code, Terraform, or an uploaded PDF, Word, Excel, PowerPoint, Draw.io, or Visio file.
Build interactive maps that sync with cloud accounts, repositories, and internal catalogs so the picture stays close to the real environment, with drill-down from org level to a single container.
Paste code or connect private and public Git repositories, Confluence, Notion, VS Code, and GitHub to keep diagrams grounded in actual implementation.
Run the agent toolkit in your own infrastructure under an MIT license and let MCP-compatible clients create, search, update, and export diagrams with OAuth or API tokens.
Offers an expansive infinite canvas for team brainstorming and visual workshops, but lacks Eraser's code-to-diagram automation.
#1
SpecialistAutomatically embeds visual diagrams directly inside text documents, though it lacks Eraser's specialized cloud architecture focus.
#2Provides extensive drag-and-drop shapes and templates for general diagrams, but weaker automated code-to-diagram capabilities than Eraser.
SpecialistCombines conversational workflow drafting with visual flow builders, focusing on workflow automation rather than frontend copilot embedding.

Combines team whiteboarding, documentation, and diagramming in one platform, but less tailored for automated codebase architecture.

SpecialistIDE extension providing model-agnostic AI coding assistance rather than a frontend UI component library for web applications.

SpecialistFocuses on Python-based agent building and deployment rather than frontend React component integration for web applications.

Delivers a managed platform for building and deploying conversational agents, though less focused on open-source frontend React UI kits.

Free / Open-sourceProvides an open-source TypeScript framework where agents and user interfaces share capabilities, aligning with CopilotKit's architecture.


Free / Open-sourceOpen-source tool specifically tailored for database schema visualization and ER diagrams, but lacks general system documentation features.

Stronger focus on standard Mermaid syntax and code-driven diagrams, but lacks Eraser's native autonomous architecture doc generation.

SpecialistProvides browser-native AI UI component blocks running local models, offering a client-side alternative to CopilotKit.
Offers an expansive infinite canvas for team brainstorming and visual workshops, but lacks Eraser's code-to-diagram automation.
SpecialistAutomatically embeds visual diagrams directly inside text documents, though it lacks Eraser's specialized cloud architecture focus.
Provides extensive drag-and-drop shapes and templates for general diagrams, but weaker automated code-to-diagram capabilities than Eraser.
SpecialistCombines conversational workflow drafting with visual flow builders, focusing on workflow automation rather than frontend copilot embedding.
Combines team whiteboarding, documentation, and diagramming in one platform, but less tailored for automated codebase architecture.
Delivers a managed platform for building and deploying conversational agents, though less focused on open-source frontend React UI kits.
Free / Open-sourceProvides an open-source TypeScript framework where agents and user interfaces share capabilities, aligning with CopilotKit's architecture.
Free / Open-sourceOpen-source tool specifically tailored for database schema visualization and ER diagrams, but lacks general system documentation features.
Stronger focus on standard Mermaid syntax and code-driven diagrams, but lacks Eraser's native autonomous architecture doc generation.

SpecialistProvides browser-native AI UI component blocks running local models, offering a client-side alternative to CopilotKit.