21st Agents SDK
Accelerate AI-powered product development with open-source tools and managed infrastructure.
VS
Microsoft Copilot
Your AI companion
Detailed comparison
Criteria
21st Agents SDK
Microsoft Copilot
Pricing
Freemium
Freemium
Plans & pricing
—
Copilot (Free): Free, Copilot Pro: $20/mo, Microsoft 365 Copilot (Business/Enterprise): $30/mo, Copilot Add-on (Business, Promo): $18/mo, Copilot Studio (Capacity Packs): $200/mo, Copilot Studio (Pay-as-you-go): Custom, Microsoft 365 Personal + Copilot: $8.33/mo, Microsoft 365 Family + Copilot: $10.83/mo
Free trial
—
Yes
Audience
B2B
b2b
Platforms
—
Web, Ios, Android
API
—
No
Open Source
—
Proprietary
Categories
Dev & Tech, AI & ML
Dev & Tech, Automated conversational
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 eng...
Microsoft Copilot is your companion to inform, entertain, and inspire. Get advice, feedback, and straightforward answers. Try Copilot now.
Pricing
21st Agents SDK
Freemium
Microsoft Copilot
Freemium
Plans & pricing
21st Agents SDK
—
Microsoft Copilot
Copilot (Free): Free, Copilot Pro: $20/mo, Microsoft 365 Copilot (Business/Enterprise): $30/mo, Copilot Add-on (Business, Promo): $18/mo, Copilot Studio (Capacity Packs): $200/mo, Copilot Studio (Pay-as-you-go): Custom, Microsoft 365 Personal + Copilot: $8.33/mo, Microsoft 365 Family + Copilot: $10.83/mo
Free trial
21st Agents SDK
—
Microsoft Copilot
Yes
Audience
21st Agents SDK
B2B
Microsoft Copilot
b2b
Platforms
21st Agents SDK
—
Microsoft Copilot
Web, Ios, Android
API
21st Agents SDK
—
Microsoft Copilot
No
Open Source
21st Agents SDK
—
Microsoft Copilot
Proprietary
Categories
21st Agents SDK
Dev & Tech, AI & ML
Microsoft Copilot
Dev & Tech, Automated conversational
Popularity
21st Agents SDK
Moderate
Microsoft Copilot
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 eng...
Microsoft Copilot
Microsoft Copilot is your companion to inform, entertain, and inspire. Get advice, feedback, and straightforward answers. Try Copilot now.
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
Microsoft Copilot
Provide information
Offer advice and feedback
Give straightforward answers
Inspire creativity
Entertain users
Key differentiators
21st Agents SDK
Microsoft Copilot
- AI-powered conversational assistant
- Inform, entertain, inspire
- Provides advice and answers
Other comparisons
FAQ: 21st Agents SDK vs Microsoft Copilot
21st Agents SDK: Accelerate AI-powered product development with open-source tools and managed infrastructure.. Microsoft Copilot: Your AI companion. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. 21st Agents SDK is freemium and Microsoft Copilot is freemium.
The best choice between 21st Agents SDK and Microsoft Copilot 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 Microsoft Copilot 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. Microsoft Copilot offers: Provide information, Offer advice and feedback, Give straightforward answers, Inspire creativity.
Based on our data, Microsoft Copilot currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.