21st Agents SDK
Accelerate AI-powered product development with open-source tools and managed infrastructure.
VS
Cursor
The best way to code with AI
Popularity
21st Agents ...2,845
Cursor13,673
Pricing
Freemium21st Agent...
FreemiumCursor
Features
4
21st Agent...
vs
4
Cursor
Our verdict
Cursor is significantly more popular in terms of media coverage and engagement.
21st Agents SDK is more geared toward B2B users, while Cursor targets b2b.
Cursor offers an API for integration into your workflows.
Detailed comparison
Criteria
21st Agents SDK
Cursor
Pricing
Freemium
Freemium
Plans & pricing
—
Hobby: Free, Pro: $16/mo, Pro+: $48/mo, Ultra: $200/mo, Teams: $32/mo, Enterprise: Custom, Bugbot Free: Free, Bugbot Pro: $40/mo
Free trial
—
Yes
Audience
B2B
b2b
Platforms
—
Desktop, Web, Ios, Android, Cli, Api
API
—
Yes
Open Source
—
Proprietary
Integrations
—
Github, Slack, Linear, Jira, Sourcegraph, Temporal, Dagster, Opensearch, Jetbrains, Figma, Canva, Miro, Dovetail, Zeplin, Notion, Google-drive, Dropbox, Google-workspace, Workday, Salesforce
Categories
Dev Tools, AI Agents
Dev Tools
Popularity
Moderate
Very High
Description
The 21st Agents SDK provides open-source UI components and developer tools for building and deploying AI agents faster. It's designed for frontend engineers, designers, product teams, and founders building AI applications. The SDK offers built-in UI, chat history, spend limits, and observability, alongside managed infrastructure for auto-retries and graceful recovery, significantly simplifying development.
Cursor is an AI-native code editor built to make you extraordinarily productive. It offers advanced AI features to streamline your software development workflow, acting as the best way to build software with AI.
Pricing
21st Agents SDK
Freemium
Cursor
Freemium
Plans & pricing
21st Agents SDK
—
Cursor
Hobby: Free, Pro: $16/mo, Pro+: $48/mo, Ultra: $200/mo, Teams: $32/mo, Enterprise: Custom, Bugbot Free: Free, Bugbot Pro: $40/mo
Free trial
21st Agents SDK
—
Cursor
Yes
Audience
21st Agents SDK
B2B
Cursor
b2b
Platforms
21st Agents SDK
—
Cursor
Desktop, Web, Ios, Android, Cli, Api
API
21st Agents SDK
—
Cursor
Yes
Open Source
21st Agents SDK
—
Cursor
Proprietary
Integrations
21st Agents SDK
—
Cursor
Github, Slack, Linear, Jira, Sourcegraph, Temporal, Dagster, Opensearch, Jetbrains, Figma, Canva, Miro, Dovetail, Zeplin, Notion, Google-drive, Dropbox, Google-workspace, Workday, Salesforce
Categories
21st Agents SDK
Dev Tools, AI Agents
Cursor
Dev Tools
Popularity
21st Agents SDK
Moderate
Cursor
Very High
Description
21st Agents SDK
The 21st Agents SDK provides open-source UI components and developer tools for building and deploying AI agents faster. It's designed for frontend engineers, designers, product teams, and founders building AI applications. The SDK offers built-in UI, chat history, spend limits, and observability, alongside managed infrastructure for auto-retries and graceful recovery, significantly simplifying development.
Cursor
Cursor is an AI-native code editor built to make you extraordinarily productive. It offers advanced AI features to streamline your software development workflow, acting as the best way to build software with AI.
Features
21st Agents SDK
Built-in UI and chat history
Spend limits and sandbox execution with isolated VMs
Observability including session replay and traces
Supports Claude and OpenAI models with token-by-token streaming
Cursor
AI Agents
Code Review
AI-powered Tab Completions
Shared Chats and Commands
Key differentiators
21st Agents SDK
Cursor
- AI-Native Architecture
- Deep Codebase Understanding
- Agentic AI Capabilities
- User-Centric Productivity Focus
- Flexible Model Support
Other comparisons
FAQ: 21st Agents SDK vs Cursor
21st Agents SDK: Accelerate AI-powered product development with open-source tools and managed infrastructure.. Cursor: The best way to code with AI. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. 21st Agents SDK is freemium and Cursor is freemium.
The best choice between 21st Agents SDK and Cursor depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
21st Agents SDK is primarily designed for businesses and professionals, while Cursor is built for individuals.
21st Agents SDK offers: Built-in UI and chat history, Spend limits and sandbox execution with isolated VMs, Observability including session replay and traces, Supports Claude and OpenAI models with token-by-token streaming. Cursor offers: AI Agents, Code Review, AI-powered Tab Completions, Shared Chats and Commands.
Based on our data, Cursor currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.
Cursor offers a free trial, but 21st Agents SDK does not.
Cursor offers 20 integrations (github, slack, linear, jira, sourcegraph...) compared to 0 for 21st Agents SDK.