Agents
Knowledge Base
Open Source
AI Chatbots & Assistants
Developer Tools
Rasa
Rasa Technologies
Rasa is a popular open-source platform for building conversational AI systems, AI assistants, and enterprise chatbots. Developers can create custom dialogue flows, integrate machine learning models, connect knowledge sources, and deploy assistants across multiple channels.
PricingFree + paid
APIAvailable
Open sourceYes
Open-source edition available with enterprise offerings.
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Kore.ai
Kore.ai
Enterprise AI platform for conversational assistants, AI agents, and workflow automation.
APIClosedPaid onlyPaid plans
Aider
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The original AI pair programmer for your terminal — Git-native and model-agnostic.
No APIOpenFree tierFree
Cline
Cline
Open-source AI coding agent for VS Code with terminal access and dynamic MCP creation.
No APIOpenFree tierFree
Codex
OpenAI
OpenAI's open-source terminal coding agent powered by GPT models.
No APIOpenFree tierFree