Compare primitive.dev
primitive.dev is email infrastructure for AI agents: managed *.primitive.email addresses, a one-line primitive chat verb that sends and waits for the reply, and hosted Functions that run on inbound mail. These pages compare it with other options so you can choose the right model for how your agent uses email.
primitive.dev vs. AgentMail
Both build email for AI agents. Compare two-way conversations, hosted inbound handlers, MCP, and open source.
primitive.dev vs. Shipmail
The closest head-to-head: both give agents a mailbox over MCP. Compare one-call conversations, hosted inbound code, in-agent App UI, and open source.
primitive.dev vs. Nylas
Managed agent-native addresses vs. syncing to a user’s existing Gmail or Microsoft 365 mailbox. Two different models.
primitive.dev vs. Mailgun
Application transactional sending at volume vs. an agent’s own identity, a one-call conversation, and code on inbound mail.
primitive.dev vs. Postmark
Transactional email with inbound parsing to your webhook vs. running your code at the agent’s own address and replying in one call.
primitive.dev vs. Mailtrap
A delivery platform that hands inbound to a webhook you host vs. running your code at the agent’s own address and replying in one call.
primitive.dev vs. Resend
An email API for a developer’s app vs. email for the agent itself — its own address, code at the address, and a reply in one call.
primitive.dev vs. Gmail
Borrowing a person’s Google mailbox — OAuth, restricted-scope verification, per-user limits — vs. giving the agent its own address.
primitive.dev vs. Outlook / Microsoft 365
Driving a licensed M365 seat through Graph — app registration, admin consent, tenant throttling — vs. an agent that owns its address.
Not sure where to start? The guide to choosing email infrastructure for AI agents walks the decision end to end. Or jump straight to the developer resources.