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Connected product and software delivery

Give your best people the delivery power of an entire software organisation.

Reja connects their product decisions to architecture, implementation and verification, giving AI agents the context and controls to build production software autonomously.

Build fully tested and documented enterprise-grade software in weeks, not years.
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Explore Reja

The Reja semantic graph

One source of truth, from product intent to production.

AI coding tools usually see a prompt, a ticket or a source file. Reja gives AI a connected understanding of the whole product: why it exists, how it should work, how it should be built and how the result will be proven.

Change one decision. Reja can trace everything it affects.
Living product modelEverything connected
  • Product intentCustomer needs, commercial goals and outcomes
  • ExperienceFeatures, journeys, rules and prototypes
  • ArchitectureServices, data, APIs, events and boundaries
  • ImplementationLibraries, methods, SDKs and source responsibilities
  • ProofBehaviour, security and operational evidence

Product capabilities

See the connected model at work.

Four real Reja views show how product definition, system design, prototypes and automated verification remain part of the same delivery process.

Live Reja product view01 / 04
Gateway Ecommerce Acceptance product map inside Reja with Testing Expert working alongside it Connected product model
01

Connect every product decision

See the product and software as one connected model.

Follow the connections from commercial intent and features through customer journeys, architecture and the services that will deliver them.

02

Understand the whole system

See how data, responsibilities and dependencies fit together.

Explore how information moves between customers, services and external systems. Change a decision and understand what else it affects before Reja builds it.

03

Test the product before building it

Experience complete customer journeys before production code.

Turn connected user and business flows into working desktop and mobile prototypes. Refine the experience, then carry the approved decisions into implementation and tests.

04

Verify every phase

Reja checks the work as AI produces it.

Automated checks compare the implementation, tests, deployment and security evidence with the approved design. When something is wrong, Reja gives the agent the context to correct it and checks the result again.

Reja product view01 / 04
Gateway Ecommerce Acceptance product map inside Reja with Testing Expert working alongside it Connected product model

Connect every product decision

See the product and software as one connected model.

Follow the connections from commercial intent and features through customer journeys, architecture and the services that will deliver them.

Reja product view02 / 04
Gateway Ecommerce Acceptance data-flow view inside Reja with Testing Expert working alongside it Data and system flow

Understand the whole system

See how data, responsibilities and dependencies fit together.

Explore how information moves between customers, services and external systems. Change a decision and understand what else it affects before Reja builds it.

Reja product view03 / 04
Gateway Merchant Portal dashboard prototype inside the Reja application with Testing Expert open Working prototype

Test the product before building it

Experience complete customer journeys before production code.

Turn connected user and business flows into working desktop and mobile prototypes. Refine the experience, then carry the approved decisions into implementation and tests.

Reja product view04 / 04
Gateway implementation conformance and completion evidence inside Reja with Testing Expert open Automated verification

Verify every phase

Reja checks the work as AI produces it.

Automated checks compare the implementation, tests, deployment and security evidence with the approved design. When something is wrong, Reja gives the agent the context to correct it and checks the result again.

Built with Reja

Created to deliver a real payment platform.

AltitudePay is a UK online banking payment solution that combines immediate QR payments with loyalty built into the experience.

Reja was developed while building AltitudePay. The proposition, payment architecture, customer journeys, software and tests were connected and delivered through Reja.

See AltitudePay in action

The same connected model carried AltitudePay from its commercial proposition through payment architecture, working journeys, production software and automated tests.

One controlled process

From an expert decision to verified software.

Each phase builds on the same connected model. Reja checks the work against every previous decision before AI moves forward.

  1. Product
  2. Architecture
  3. Implementation
  4. Deployment
  5. Hardening
Product

Define the outcomes, customers, features and commercial goals.

Verified against the connected product model

AI builds. You stay in control.

AI that understands the whole product—not just the next task.

An agent implementing an API can understand the customer journey it supports, the rules it must enforce, the data it owns, the services it can call and the tests it must pass.

Reja delivery agentConnected and verified

You Build the merchant payment flow.

  1. Requirements understoodCustomer outcome and business rules
  2. Design connectedJourney, services, contracts and data flow
  3. Software built and checkedImplementation verified against the design
  4. Result provenBehaviour, deployment and security evidence

Built for autonomous delivery

Context the agent can act on.

Reja combines the connected model with the planning, tools, memory and verification agents need to take responsibility for complex work—not merely suggest the next piece of code.

Reja agent runtimePlan. Search. Build. Check. Continue.
Goals and task lists
Agents turn sophisticated outcomes into ordered work, preserve progress and continue autonomously across long-running delivery.
Built-in verifiers
Agents run Reja's verifiers throughout each phase. Reja returns exact findings and connected context when their work is incomplete or wrong.
Project-aware MCP servers
Agents get controlled tools to search the graph, inspect exact product and software facts, trace relationships and return to their authored source.
Continuously updated memory
Local vector memory stays current as the product and conversations change, giving agents fast semantic search across the wider project.

Continuous verification

Reja checks the work as it is produced.

Reja builds a verification process around every phase. Product definition, architecture, code, tests, deployment and security are checked against the connected decisions they must satisfy.

BuildVerifyCorrect

Automatic correction

When AI gets something wrong, Reja knows what to do next.

A failed check is not left as a report for somebody to interpret later. Reja identifies the decision, contract or control that was not satisfied and returns that context to the agent.

The agent corrects its work and Reja runs the checks again. This cycle continues until the implementation satisfies the approved design and the evidence proves it.

Verification runningImplementation
FindingPayment retry does not satisfy the approved contract

The retry path can create a second payment because the required idempotency check is missing.

Context returned to agent
  • Merchant payment requirement
  • Payment API contract
  • Service responsibility
  • Failing behaviour test
Corrected and recheckedAll required checks passed

Pricing

Start exploring.
Build when you're ready.

Use Reja free for learning and non-commercial projects. Upgrade to deliver commercial software or deploy Reja across your enterprise.

Not sure where you fit? Choose the licence that reflects who is using Reja and how the resulting software will be used.

Standard

Explore Reja

Non-commercial

Explore the connected product model and learn how Reja directs AI delivery.

Free*

No payment required

What's included

  • Product, design and implementation phases
  • Integrated AI agent workflow
  • Unlimited non-commercial projects
Create free accountFor learning, education and evaluation.

Pro

Build commercially

Independent

Take commercial software from product intent to tested, production-ready code.

$100* / month

One named developer
Available to individuals with annual gross business revenue below $500,000.

Everything in Standard, plus

  • Commercial software delivery
  • All five Reja delivery phases
  • Secure access on supported desktop platforms
Get started with ProCreate a Standard account, then upgrade after signing in.

Enterprise

Build at enterprise scale

Organisation-wide

Give your strongest people direct control of AI-powered software delivery.

Custom*

Commercial agreement

Everything in Pro, plus

  • Unlimited named users
  • Enterprise identity, access and governance
  • Full ownership of produced software IP
Talk to our teamFor organisations and qualifying commercial use.
*AI Coding Subscription RequiredRequires an active paid ChatGPT plan with Codex access or a Claude plan with Claude Code access. Your AI subscription is purchased separately and is not included in the Reja price.

StandardLearn and evaluate without commercial use.

ProDeliver commercially as one eligible independent developer.

EnterpriseAdopt Reja across an organisation under one agreement.

Reja for enterprise

Put your most capable people in direct control of delivery.

Your experts make the important decisions. AI performs the delivery work. Reja keeps every requirement, change, implementation and test connected, visible and accountable.

One connected product and delivery systemUnlimited named usersFull ownership of produced software IPEnterprise identity, access and governance controls

We use these details only to review and respond to your enquiry. They are available only to authorised Reja administrators.