Inkbox

Inkbox is an identity and communication layer for AI agents. It gives each agent a single identity that includes an email inbox, a phone number, iMessage, a public internet address and an Agent2Agent channel, so that people, apps and other agents can reach the agent the way they would reach a teammate. The site states that the company is backed by Y Combinator. It is aimed at developers and teams running agents that need to send and receive messages and calls. The agent can reply, follow up and start conversations, and the platform keeps memory across channels so that emails, texts and calls with the same person stay connected. Owners can control who is allowed to reach each agent on every channel, and agents can hand work to one another directly. Identities can be created through a command line tool, an SDK, a skill or an MCP server, and plugins are offered for Claude, ChatGPT, Claude Code, Codex, OpenCode and Hermes. The Free plan costs $0 per month and includes 3 agent identities with an inbox, a public URL, shared iMessage and an agent to agent channel. Developer is $30 per month for 10 identities with one dedicated VoIP phone number and 10 custom email domains. Startup is $200 per month for 100 identities and 100 custom domains. Enterprise pricing is custom. Additional SMS or MMS in the U.S. and Canada cost $0.03 per message and extra call minutes cost $0.03 per minute. Prices exclude applicable taxes.