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Example product you can build today · API-First SaaS Backend

Bring any frontend. Keep the backend.

Build your customer experience in React, Vue, Next.js, mobile, a native desktop app, or an existing codebase. Use BuildWithHQ as the managed SaaS backend and expose the platform’s records, relationships, permissions, workflows, AI, files, webhooks, audit trail, and custom services through APIs.

Frontend anywhereAPI-first backendDedicated data planesCustom services when needed
Headless SaaS DB · product previewBuilt with BuildWithHQ
ANYFrontend stack
3Dedicated data planes
1Governed backend
HEADLESS APPLICATION FLOWYour frontend calls one governed SaaS backend

A customer action hits the API layer, permissions are evaluated server-side, the requested record or workflow is processed, and audit evidence is captured before the response returns to your UI.

API requestPermission checkReturn response
Product blueprint

Build the frontend your way without rebuilding the SaaS plumbing underneath it.

Use BuildWithHQ as a headless application backend. Your frontend owns the presentation layer while BuildWithHQ manages the data model and reusable SaaS capabilities behind a governed API surface.

Build your version
01

Managed application data

Define customers, users, products, projects, transactions, custom records, and other domain data without maintaining a separate backend stack for each frontend.

02

API-based access

Let your own applications create, read, update, relate, search, and act on permitted data through authenticated API calls.

03

Permissions stay server-side

Keep record-level, field-level, tenant, role, and other authorization decisions in the backend instead of trusting frontend code to enforce security.

04

Workflows + webhooks

Trigger business processes, approvals, notifications, scheduled jobs, and outbound integrations from events initiated by any frontend.

05

AI + vector capabilities

Expose secured retrieval, embeddings, company knowledge, AI actions, and agent workflows to custom interfaces without moving the AI data layer into the browser.

06

Custom container services

When a project needs a specialized SDK, library, model, or private service, run it in the isolated extension container and expose it through a declared API contract.

What this unlocks: Headless SaaS DB lets developers keep complete control over the customer-facing experience while reusing the difficult backend layers that every serious SaaS product eventually needs.
Product → platform map

A focused product experience on top. Reusable BuildWithHQ primitives underneath.

Headless SaaS DB experience

The product experience

  • Your React / Vue / mobile UI
  • Authenticated data API
  • Files + relationship endpoints
  • Workflow + webhook actions
  • AI / search from custom screens
Built with BuildWithHQ

Platform primitives

  • Dedicated runtime database
  • Permissions + tenant security
  • Workflow / action engine
  • AI + vector data plane
  • Audit + isolated services
Architecture

A dedicated application architecture built for production.

The frontend can live anywhere. BuildWithHQ remains the governed backend boundary for operational records, AI context, compliance evidence, and custom services, so multiple interfaces can share the same secured application core.

Runtime DatabaseUsers · product records · workflows · configuration
AI / Vector DatabaseEmbeddings · knowledge · retrieval · AI configuration
Compliance DatabaseReads · approvals · refusals · evidence · replay trail
Isolated Code ContainerCustom APIs · SDKs · private logic · background services
Explore architecture
Build another category

Sixteen product directions. One application platform.

Choose the product pattern closest to your market, then tailor the data model, screens, AI behavior, integrations, permissions, workflows, and positioning.

Build this

Start with Headless SaaS DB. Put your own frontend on a production SaaS foundation.

Keep the UI framework, deployment model, and user experience you want. Use BuildWithHQ for the managed data, security, workflow, AI, integration, and audit capabilities behind it.

Get started free See platform capabilities