“Go”

Open-source, Apache-2.0 visual tool for building AI agents, apps and workflows with plugins, knowledge bases and an API and chat SDK

HubSpot builder for creating custom agents and workflows on one canvas using CRM data such as contacts, deals and conversations

Platform for building, testing and deploying AI voice and chat agents for phone calls, with a drag-and-drop call flow editor

No-code Microsoft platform for building custom AI agents, workflows and apps, with connectors, MCP servers and a model catalog