Agent FrameworksFree
OpenFang
An open-source Agent Operating System built from scratch in Rust, designed to run autonomous agents on schedules.
Verified
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Developer libraries for building agents (LangChain, CrewAI, LangGraph, AutoGen).
Agent FrameworksFreemium
Thunderbolt
Open-source, self-hosted enterprise AI client emphasizing data sovereignty and model choice.
VerifiedFreemium
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Agent FrameworksFree
Agent Development Kit (ADK)
ADK is the open-source agent development framework that lets you build, debug, and deploy reliable AI agents at enterprise scale.
Verified
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Agent FrameworksFreemium
Mailto.Bot – Email API for AI agents with native MCP support
Email API for AI agents with native MCP support and instant mailbox creation.
VerifiedFreemium
View Mailto.Bot – Email API for AI agents with native MCP support