Thunderbolt

Thunderbolt is an open source, cross platform AI client that organizations can self host. It gives teams a single interface for chatting with models and agents, with the vendor's tagline being AI you control. It connects to any agent that supports the Agent Client Protocol and to any model exposed through an OpenAI compatible API, with Claude, Codex, OpenClaw, DeepSeek and OpenCode named as examples. The client is built for enterprises that need control over their data. It can be run on the customer's own infrastructure, on premises, in a sovereign cloud or air gapped, and the vendor states that data never leaves the customer's control. Native apps are available for the web, Windows, macOS, Linux, iOS and Android. Other listed capabilities include MCP integration with internal systems, custom integrations through a full API and automations, which are reusable workflows for recurring tasks. For delivery, the vendor describes a partnership with deepset and its Haystack orchestration platform, providing forward deployed engineering and sovereign deployments across the EU, with Thunderbolt serving as the client layer in that stack. The code is open source, so it can be audited and customized. The site publishes no pricing; prospective customers are directed to start a pilot deployment or contact the enterprise team.