Custom Software

The cost of a custom project depends strictly on functional scope: number of modules, screens, API integrations and business complexity. A simple internal tool, a custom ERP and a full CRM are worlds apart in effort. Every project gets a precise written quote within 48 hours of a free audit. We break the quote down transparently by functional batch, so you can spread the investment across phases if that suits your budget.

A working MVP usually ships in 8 to 12 weeks. A complete business system (CRM, ERP, internal platform) takes 4 to 8 months depending on scope and the number of integrations. We work in two-week agile sprints: you see the product being built continuously, and every sprint produces a testable version. That approach kills the tunnel effect and lets you reprioritise as you learn.

A generic SaaS is the right call when your processes are standard and the tool covers 90% of what you need (classic sales CRM, accounting, simple HR). Custom becomes the better answer the moment you start working around the SaaS limits, pay for several tools to do one job, or run business rules nobody else has. Once you have around 30 users on a SaaS priced near 30 EUR per seat per month, custom typically pays for itself within 2 to 3 years.

Yes, entirely. From delivery, the source code is your full property. We hand over complete access to the GitHub repository, the technical documentation, the credentials, and everything any competent developer needs to take the project over. No licence, no hidden subscription, no technical dependency on Go To Agency. That is the fundamental difference with SaaS, where you rent a tool you will never own.

We offer monthly maintenance plans, quoted per project, covering bug fixes, security updates, monitoring, technical support and a credit of development hours. You can also trigger one-off improvement sprints whenever you need them. If you would rather handle maintenance in-house or with another vendor, that works too: the code and documentation are built to make you independent.

Yes, by design. We use Supabase and PostgreSQL for data and Vercel for front-end hosting: infrastructure that scales automatically from 10 to 100,000 users without a rebuild. Architecture decisions (caching, pagination, indexing, optimised queries) are sized against your realistic growth curve. Technical scalability carries no hidden surcharge: it is part of our quality baseline.

Security by design: hardened authentication (bcrypt hashing, optional MFA), fine-grained permissions (RBAC), encryption of sensitive data, protection against the classic attack surface (SQL injection, XSS, CSRF). For GDPR: processing register, user data export and deletion functions, consent management, European hosting (Vercel and Supabase EU regions), DPA provided. A security audit runs before every production release.

Yes. We build REST API integrations with most ERPs (SAP, Sage, Cegid, Odoo, EBP), accounting platforms (Pennylane, Tiime, QuickBooks) and CRMs (Salesforce, HubSpot, Pipedrive). If your existing system exposes no API, we can build custom connectors instead (CSV import and export, webhooks, shared database). The upfront audit pins down exactly which integrations are needed and how feasible each one is.

Absolutely, and it is one of our strongest commitments. The code uses mainstream technologies (Next.js, TypeScript, PostgreSQL) you can hire for anywhere. It is commented, structured along industry conventions, and shipped with full technical documentation: architecture, database schema, API, deployment procedures. We also provide a detailed developer onboarding guide. You are never a prisoner of Go To Agency.

By default: Vercel for the front-end and Supabase for the back-end and database, both with European data centres to satisfy GDPR. That infrastructure scales automatically, ships daily backups, and delivers availability above 99.9%. If you have specific constraints (French hosting with OVH, on-premise, sovereign cloud), we adapt the infrastructure. Monthly hosting typically lands between 25 and 200 EUR depending on load, based on Vercel and Supabase list pricing at the time of writing.

That is our job. You send us a written brief covering your priority business goals and your current pain points, and we reply within one business day with the questions that matter. From there we run a written scoping phase (a few days depending on complexity) that produces a specification document, a cost breakdown by batch, and a schedule. That scoping phase is quoted separately and deducted from the final quote if you go ahead with us.

Everything happens in writing, with no calls and no meetings. You fill in the brief form describing your business, your challenges and your current processes. We read it, ask the follow-up questions needed to qualify the need, and come back within 48 hours with a price range and a timeline. If the project is mature, we propose a written scoping phase. If it is not, we point you towards the best solution for you, even when that solution is not us.