Choosing an AI chat builder kit: CopilotKit vs OpenAI ChatKit vs Gram Elements

Chat builder kits, such as CopilotKit, OpenAI ChatKit, and Gram Elements, offer enhanced functionality beyond traditional chatbots by integrating AI agents that can execute functions, update states, and trigger workflows through natural language interactions. Each framework is designed to connect user interfaces with AI agents in unique ways, impacting integration complexity, state management, customization options, pricing models, and observability. CopilotKit, being open-source, provides the most control over state synchronization and UI customization, allowing agents direct access to app states, but involves complex hook definitions. OpenAI ChatKit, suitable for those already using the OpenAI ecosystem, requires setup through the OpenAI platform and involves unpredictable pay-as-you-go pricing based on token usage, but offers a streamlined integration process. Gram Elements focuses on production observability with detailed session insights and a predictable tiered pricing model, though it limits state management to MCP server interactions. Each framework's capabilities and limitations make them suitable for different use cases, such as content-heavy SaaS deployments, rapid integration within existing ecosystems, or large-scale production monitoring.