Accelerate AI-powered product development with open-source tools and managed infrastructure.

Pioneering AGI research with open-source foundational models and API access.
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.
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.