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HelloStay French software publisher
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French software publisher · digital sovereignty

Take back control of your data.

HelloStay builds bespoke software and SaaS components, integrated into your information system. Our standard is simple: full ownership — data, architecture and operations. We replace “black boxes” with transparent, documented and truly operable solutions, from design to production run.

Discuss a need
  • 13 years of experience Delivery, systems integration, support and data governance.
  • Transparency Clear architecture, documentation, traceability and handover.
  • End-to-end Development, integration, hosting, monitoring and run.

They trust us

Clients

Public and private organisations trust us with projects where data governance and reliability are non-negotiable.

French Republic (Marianne)
French Republic

In the public sector, trust is built on compliance, traceability and auditability from day one. We deliver solutions integrated into public information systems, documented, and designed for long-term operations.

  • IS integration: directories, authentication, internal APIs
  • Traceability of actions and processing, security requirements
  • Run: monitoring, incident response, controlled handover

Goal: governed, operable and durable software — with no hidden dependencies.

Thales
Thales

High-tech industrial group: complex environments, strong constraints and high expectations for reliability. They engage us for rigorous execution and controlled systems integrations, with transparent and measurable architecture.

  • Quality delivery: tests, CI/CD, multi-environment management
  • Systems integration: flows, dependencies, security and robustness
  • Measurement & operations: performance, resilience, observability

Goal: stable production software, operable day-to-day, maintainable over time — with no “black box”.

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Approach

A simple method

A clear framework to move forward, validate and integrate — without surprises.

01

Scoping

Objectives, scope, risks, IS constraints, data governance and compliance.

02

Prototype

Mockups, specifications, architecture choices, delivery plan and operational criteria.

03

Build

Iterative development, testing, security, documentation and traceability.

04

Go live

Deployment, monitoring, handover, run and continuous improvement.

Team

Who are we?

A family-owned company with complementary skills.

Portrait of Florent Neyron

Florent Neyron

Founder · Product & Technical leadership

Florent designs software that is simple, reliable and genuinely useful day-to-day. He drives product vision and architecture so solutions stay quick to adopt, stable and pleasant to use.

  • Product vision: field needs, prioritisation and continuous improvement.
  • Architecture & quality: performance, security, maintainability.
  • Delivery: fast iterations and controlled deployments.

Goal: save time and reduce operational friction.

Portrait of Adrien Neyron

Adrien Neyron

Full Stack Developer

Adrien delivers features end-to-end: clear interfaces, robust APIs, automation and integrations. He focuses on reliability and the details that make a real difference.

  • Full stack development focused on usability and simplicity.
  • Automation & integrations to streamline workflows.
  • Quality & stability: tests, monitoring and continuous optimisation.

Goal: a smooth, stable and high-performing product — every day.

References

Portfolio

Products already delivered and deployed, with references in France, including in institutional contexts.

Screenshot of TerriaDesk

TerriaDesk

Tickets & projects

Tickets & projects hub: team workflows, multi-workspaces, European SaaS deployment or on-premise.

  • Separate workspaces
  • SaaS or on-premise
  • Data hosted in Europe (GDPR)
Discover TerriaDesk
Screenshot of Folio

Folio

Financial tracking

Account tracking: bank connections, history, performance and breakdown by account type.

  • Performance charts
  • Breakdown by account type
  • Centralised bank connections
Discover Folio

A responsible partner, from scoping to run.

HelloStay combines systems experience, delivery and governance to strengthen your web, mobile and IS products. You get a stable, governed solution hosted in France/EU — and a straightforward working relationship, with no grey areas.

Let’s talk

Contact

Contact & information

A question, a need, an audit? Let’s talk.

Contact

Email: contact@hellostay.fr

Availability: we typically reply within 24–48 hours.

Legal information

  • Company name: HELLO STAY
  • SIREN: 979 645 082
  • SIRET (HQ): 979 645 082 00012
  • VAT ID: FR61 979 645 082
  • Address: 58 RUE DE MONCEAU 75008 PARIS, FRANCE
  • Legal form: SARL
  • NAF/APE code: 82.99Z
  • Registered with RNE (INPI)

Location

Annecy, remote delivery across Europe.