Email infrastructure for cross-functional teams
Avi Goldman, founder of Parcel, on the email developer experience
This marks the shift from email tooling for individual specialists to email infrastructure for cross functional teams. At brands, one person writes the HTML, another tweaks copy, others review legal, design, and approvals, and the real bottleneck is moving small changes back through a developer. Parcel’s component system turns those handoffs into controlled edits, while Customer.io gives those edits a place to flow straight into the sending platform.
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Parcel started as a developer first IDE for email, with file trees, autocomplete, live previews, and testing. But the product direction changed once larger brand teams showed that marketers and copywriters needed to edit within the same system instead of waiting on engineers for every text or brand update.
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The concrete product answer was components. Instead of pasting full HTML into every campaign, teams can define reusable building blocks like buttons, rows, and content blocks once, then let marketers change approved fields while developers keep control of the underlying code and logic.
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That is also where Parcel differs from Litmus. Litmus has been strongest as a testing and preview suite with broader marketer workflows, while Parcel has leaned into creation and developer ergonomics. Folding Parcel into Customer.io lets Customer.io bundle both sides of the workflow and replace spend on separate tools.
The direction is toward a shared message layer where developers define the system once and marketers operate inside guardrails. If Customer.io keeps wiring Parcel components directly into campaign creation and message sending, email work becomes less about exporting code between tools and more about updating a central design system that stays current across every message.