21st Agents SDK
Accelerate AI-powered product development with open-source tools and managed infrastructure.
VS
DeepSeek
Pioneering AGI research with open-source foundational models and API access.
Popularity
21st Agents ...2,845
DeepSeek10,587
Pricing
Freemium21st Agent...
FreemiumDeepSeek
Features
4
21st Agent...
vs
6
DeepSeek
Our verdict
DeepSeek is significantly more popular in terms of media coverage and engagement.
21st Agents SDK is more geared toward B2B users, while DeepSeek targets b2b.
DeepSeek offers an API for integration into your workflows.
Detailed comparison
Criteria
21st Agents SDK
DeepSeek
Pricing
Freemium
Freemium
Plans & pricing
—
DeepSeek V4 Flash API: Custom, DeepSeek V4 Pro API (Promotional): Custom, DeepSeek V4 Pro API (Regular): Custom, DeepSeek V3.2 API (Legacy): Custom, API Free Tier: Free, Free Web Chat: Free
Free trial
—
Yes
Audience
B2B
b2b
Platforms
—
Web, Ios, Android, Desktop, Api, Cli
API
—
Yes
Open Source
—
Open Source
Integrations
—
Zotero, Siyuan, Raycast, Chatbox, Mem0, Cursor, Google-sheets, Gmail, Google-drive, Notion, Google-docs, Telegram, Google-forms, Feedly, Slack, Salesforce, Microsoft-teams, Hubspot, Github, Zapier
Categories
Dev Tools, AI Agents
Data Science, 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.
DeepSeek, founded in 2023, focuses on researching world-leading foundational models and technologies for general artificial intelligence, tackling cutting-edge AI challenges. Leveraging self-developed training frameworks and extensive computing resources, they have rapidly open-sourced multiple large models, including DeepSeek-LLM, DeepSeek-Coder, and China's first DeepSeek-MoE in January 2024. These models show superior performance in benchmarks and can be accessed via API.
Pricing
21st Agents SDK
Freemium
DeepSeek
Freemium
Plans & pricing
21st Agents SDK
—
DeepSeek
DeepSeek V4 Flash API: Custom, DeepSeek V4 Pro API (Promotional): Custom, DeepSeek V4 Pro API (Regular): Custom, DeepSeek V3.2 API (Legacy): Custom, API Free Tier: Free, Free Web Chat: Free
Free trial
21st Agents SDK
—
DeepSeek
Yes
Audience
21st Agents SDK
B2B
DeepSeek
b2b
Platforms
21st Agents SDK
—
DeepSeek
Web, Ios, Android, Desktop, Api, Cli
API
21st Agents SDK
—
DeepSeek
Yes
Open Source
21st Agents SDK
—
DeepSeek
Open Source
Integrations
21st Agents SDK
—
DeepSeek
Zotero, Siyuan, Raycast, Chatbox, Mem0, Cursor, Google-sheets, Gmail, Google-drive, Notion, Google-docs, Telegram, Google-forms, Feedly, Slack, Salesforce, Microsoft-teams, Hubspot, Github, Zapier
Categories
21st Agents SDK
Dev Tools, AI Agents
DeepSeek
Data Science, Dev Tools
Popularity
21st Agents SDK
Moderate
DeepSeek
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.
DeepSeek
DeepSeek, founded in 2023, focuses on researching world-leading foundational models and technologies for general artificial intelligence, tackling cutting-edge AI challenges. Leveraging self-developed training frameworks and extensive computing resources, they have rapidly open-sourced multiple large models, including DeepSeek-LLM, DeepSeek-Coder, and China's first DeepSeek-MoE in January 2024. These models show superior performance in benchmarks and can be accessed via API.
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
DeepSeek
Open-source foundational AI models
DeepSeek-LLM, DeepSeek-Coder, and DeepSeek-MoE available
API access for model integration
Cutting-edge AGI research and development
Superior performance in public benchmarks
Self-developed training frameworks and advanced computing resources
Key differentiators
21st Agents SDK
DeepSeek
- Cost-efficient performance
- Open-source flexibility
- Strong coding & math skills
- Efficient inference & scalability
- Chinese language expertise
Other comparisons
FAQ: 21st Agents SDK vs DeepSeek
21st Agents SDK: Accelerate AI-powered product development with open-source tools and managed infrastructure.. DeepSeek: Pioneering AGI research with open-source foundational models and API access.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. 21st Agents SDK is freemium and DeepSeek is freemium.
The best choice between 21st Agents SDK and DeepSeek 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 DeepSeek 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. DeepSeek offers: Open-source foundational AI models, DeepSeek-LLM, DeepSeek-Coder, and DeepSeek-MoE available, API access for model integration, Cutting-edge AGI research and development.
Based on our data, DeepSeek currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.
DeepSeek offers a free trial, but 21st Agents SDK does not.
DeepSeek is open source, while 21st Agents SDK is proprietary. Open source tools offer more transparency and customization options.
DeepSeek offers 20 integrations (zotero, siyuan, raycast, chatbox, mem0...) compared to 0 for 21st Agents SDK.