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Internal Developer Platforms and Portals, a complete overview

By 2026, 80% of large software engineering organizations will establish platform engineering teams as internal providers of reusable services, components and tools for application delivery.
— Gartner
We’ve compiled all of our learnings from our customers and personal experience into this comprehensive whitepaper on building a developer platform and portal. In the whitepaper, we will answer the following questions:
What is a developer platform and what are its different parts
What is a developer portal and why do I need one?
What are it’s benefits?
How can you successfully build one in your organization?

Reference Architecture of an Internal Developer Platform

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Loved by high performing engineering teams

Rely.io is highly valued by all teams within the engineering organization, particularly by platform engineers, SREs, DevOps, product engineers and engineering leaders.
At Wix, we built our own internal developer portal. This project took years and required significant investment from some of our best engineers. I wish Rely.io existed when we started—they would have dramatically reduced our time to market, improved our ROI, and allowed us to invest several engineering hours to other projects, delivering more value to our customers. And that’s why I decided to invest in them.
Aviran Mordo
VP of Engineering at Wix
As we transition from unstructured flexibility to expert-driven approaches, Rely.io has excelled in the Internal Developer Portal category. The behind-the-scenes work that occurs after enabling plugins in Rely.io is nothing short of magical, freeing developers from unproductive tasks.
Pedro Torres
Senior Director of Engineering at Salsify
Having explored this space while building engineering teams at two previous scale-ups, I found Rely.io's approach unique and well-suited to ensure service ownership. Rely.io offers an opinionated platform that helps users get started quickly, while providing interesting extensibility options to adapt to diverse environments.
Tiago Sousa
Head of Engineering at Amplemarket
Rely.io is an intuitive solution designed by experts to address real engineering challenges. The platform helps companies streamline their processes through a user-friendly interface and a thoughtful approach to self-service and automation. Its scorecard features improved our visibility into production readiness and helped enforce standards across the organization.
Ricardo Felgueiras
Head of Engineering at Rows