Budget, ROI and decision-making
Real prices, 3-year total cost, maintenance, choosing a provider, contracts: what to know before launching a custom software project.
Calculator: SaaS subscriptions or custom software
Enter your numbers and see the month custom software becomes cheaper than your subscriptions.
Run the calculation →How much does a B2B portal cost?
From $13,500 to $33,600 (€12,000–€30,000)excl. VAT for most B2B ordering portals, more for a multi-area platform: the ranges, what moves them, and how to build your budget.
Read →How much does a custom CRM cost?
From $6,800 to $22,400 (€6,000–€20,000)excl. VAT for a focused CRM, more for a tool connected to your ERP and website: what drives the price, and how to compare it with per-user licenses.
Read →How much does an order-taking app cost?
From $9,000 to $20,200 (€8,000–€18,000)excl. VAT for most order-taking apps for sales reps, more with an ERP connection and mapping: the ranges and what drives them.
Read →How much does a custom e-commerce back office cost?
From $11,200 to $28,000 (€10,000–€25,000)excl. VAT for most custom e-commerce back offices, $28,000 to $56,000 (€25,000–€50,000)excl. VAT for a multichannel tool connected to your ERP: the ranges and what drives them.
Read →How much does a delivery app cost?
From $10,100 to $22,400 (€9,000–€20,000)excl. VAT for most driver apps with proof of delivery, $22,400 to $33,600 (€20,000–€30,000)excl. VAT with customer tracking and integrations: ranges, cost items and mapping costs.
Read →How much does a client portal cost?
From $11,200 to $24,700 (€10,000–€22,000)excl. VAT for most client portals, more when they connect to your ERP or accounting: the ranges, what drives them, and the costs to plan for afterward.
Read →Total cost over 3 years: SaaS subscription or custom software
A subscription at €60 per user per month adds up to €54,000 over 3 years for 25 people: a line-by-line method to compare SaaS and custom software honestly.
Read →Calculating the ROI of a business tool
Time saved, errors avoided, subscriptions canceled: a method to put numbers on the return of a business app costing $6,800 to $22,400 (€6,000–€20,000)excl. VAT, with an example to adapt.
Read →How much does app maintenance cost?
Hosting, security updates, bug fixes and new features: what maintaining a business app actually covers, how it is billed and what yearly budget to plan.
Read →What budget to plan for custom software
$6,800 to $22,400 (€6,000–€20,000)excl. VAT for a focused business app, $16,800 to $56,000 (€15,000–€50,000)excl. VAT for a custom ERP: real price ranges, the features that push the price up and the costs to plan around them.
Read →Fixed price or time and materials: how to pay for a project
Fixed price or billing for time spent: who carries the risk, when each model fits, and how to combine them for a project between $6,800 and $56,000 (€6,000–€50,000)excl. VAT.
Read →Freelancer, agency or IT services firm for business software
A single point of contact, a multidisciplinary team or a large organization: the strengths and limits of each type of provider for a business app between $6,800 and $56,000 (€6,000–€50,000)excl. VAT.
Read →How to choose a development partner
Delivered projects, method, quote, code ownership, reversibility: the criteria and questions to ask before handing over a business app worth $6,800 to $56,000 (€6,000–€50,000)excl. VAT.
Read →Writing an RFP for a business application
Context, goals, scope, constraints, budget, selection criteria: the structure of an RFP that produces comparable quotes for an app worth $6,800 to $56,000 (€6,000–€50,000)excl. VAT.
Read →Code ownership: what to require in the contract
Paying for development does not make you the owner: under French law, rights in software ordered from a provider must be assigned in writing. The clauses to check before signing.
Read →Reversibility: not depending on your provider
Source code, access, hosting, data, documentation: what to set up from the contract stage so you can switch providers without starting over, and what a poorly prepared exit costs.
Read →MVP: starting small without rebuilding later
A useful first version from $6,800 (€6,000)excl. VAT, delivered in 1 to 3 months, with no technical debt that forces a rebuild: what you can cut, and what you should never sacrifice.
Read →Getting your teams to adopt a new tool
A tool nobody uses brings in nothing. How to involve your teams from the mockup stage, get the switchover right and measure real usage over the first three months.
Read →Grants and funding for SMB digital projects in France
Innovation tax credit, Diag Data IA, Bpifrance AI Accelerators, regional grants: the French schemes verified as active in October 2026, what they actually fund, and the traps to avoid.
Read →Why software projects overrun, and how to avoid it
Fuzzy scope, late decisions, underestimated integrations: the real causes of budget and schedule overruns, the warning signs, and the method that neutralizes them.
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