Dedicated inboxes, sending domains, and deliverability built for automation.
Email is an emerging category with 4 live companies today. A comparison matrix would be sparse, so entries are shown as a list. Blank fields mean the company does not publish that detail.
Agents get programmatically created email inboxes with a REST API to send, receive, thread, label, and search messages, plus webhook and WebSocket event delivery.
Each agent identity gets a mailbox with a unique @inkboxmail.com address that can send and receive email, with thread management, search, and filtering. Custom sending domains are available on paid plans.
An agent gets a managed email address on a primitive.email subdomain or a custom domain, plus a REST API, SDKs (Node.js, Python, Go), a CLI, and a hosted MCP server to send, receive, and reply to email.
Agents get a real email mailbox provisioned via API, and can send and receive email through REST endpoints, webhooks, SSE, or polling, using either a shared platform domain or the customer's own domain.