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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.
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CopilotKit
✓ verifiedFreemium
Open-source React/Angular SDK and platform for embedding agentic, generative-UI copilots into apps, Slack and Teams.
170K visits/mo
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Arena
✓ verifiedFreemium
Engagement suite adding live chat, comments, polls and live blogs to publisher and brand sites to grow and monetize audiences.
145K visits/mo
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Interview Coder
✓ verifiedFreemium
Undetectable desktop AI assistant that feeds real-time answers during coding and technical interviews.
167K visits/mo
Pricing
Developer: $0 (1 seat, free forever, 200 threads)
Pro: $39/developer/mo (up to 5 seats, 5,000 threads)
Team: $500/mo (5 seats, 25,000 threads)
Free: $0/mo
Starter: $49/mo
Professional: $249/mo
Business: $999/mo
Free trial available
No public pricing
Core features
- ✦React and Angular frontend SDKs
- ✦Agent-rendered generative UI
- ✦AG-UI agent-user interaction protocol
- ✦Connectors for LangChain and other frameworks
- ✦Pre-built customizable chat/sidebar components
- ✦Slack and Teams integrations
- ✦Thread and state persistence
- ✦Threaded comments
- ✦Real-time group chat
- ✦Live blog streams
- ✦AI polls and moderation
- ✦First-party data capture
- ✦No-code website embed
- ✦Real-time AI answers during technical interviews
- ✦Invisible to screen sharing and recording
- ✦Hidden from dock, tray and activity monitor
- ✦Click-through overlay
- ✦Live audio capture and transcription
- ✦Lifetime unlimited access license
Use cases
- →Adding an AI assistant to a SaaS product
- →Building agents that render interactive UI
- →Deploying copilots across Slack and Teams
- →Connecting existing agents to a frontend
- →Live event coverage
- →Growing on-site community
- →Monetizing audience with ads
- →Capturing first-party data
- →Getting live help on coding interview problems
- →Answering technical questions in real time
- →Avoiding detection during screen-shared interviews
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