Connecting your existing tools
ERP, accounting, e-commerce, marketplaces, EDI, payments, SSO: how a custom application fits into your information system.
Connecting a business app to Sage
Sage 100, Sage X3, Sage Active: each product opens up differently. What is actually possible, the traps to avoid and what a connection costs, from $6,800 (€6,000)excl. VAT for a business app linked to Sage.
Read →Connecting an app to Cegid
Cegid publishes APIs for several of its products, each with its own access rules. What is documented, how to work with your accounting firm or integrator, and the budget: $6,800 to $22,400 (€6,000–€20,000)excl. VAT for an app connected to Cegid.
Read →Connecting an app to Odoo
Odoo exposes a complete external API, but it is limited to certain plans and changing under the hood. What to know before linking an app to Odoo, and the budget: from $6,800 (€6,000)excl. VAT for a connected business app.
Read →Connecting your online store to your ERP
Orders, stock, prices, customers, invoices: which flows to sync between an online store and an ERP, with which connector, and at what cost. From $2,300 (€2,000)excl. VAT per connection to $22,400 (€20,000)excl. VAT for a full custom connector.
Read →Syncing your app with Pennylane or your accounting software
Send invoices, customers and documents from your business app to Pennylane or another accounting package, with no re-entry. What the Pennylane API allows, the alternatives, and the budget: from $6,800 (€6,000)excl. VAT for a connected app.
Read →Connecting Shopify or WooCommerce to your internal tools
Get store orders into your CRM, picking tool or dashboard without manual exports. What the Shopify and WooCommerce APIs allow, and the budget: from $6,800 (€6,000)excl. VAT for a connected internal tool.
Read →Connecting marketplaces: Amazon, Cdiscount, ManoMano
Pull orders and push offers and stock to Amazon, Cdiscount and ManoMano from your own tools. What their APIs provide, the access constraints, and the budget: from $6,800 (€6,000)excl. VAT for a connected tool.
Read →EDI: exchanging orders and invoices with large retailers
Order, despatch advice, invoice: EDI is the norm for working with large retailers. The three ways to connect, how to link EDI to your own tools, and the budget: from $6,800 (€6,000)excl. VAT for an integrated app.
Read →Mandatory e-invoicing in France: adapting your tools
Receiving e-invoices has been mandatory for all French businesses since September 1, 2026, and SMBs must issue them from September 1, 2027: the official timeline, what changes in your software, and how to adapt a business tool without starting over.
Read →Adding Stripe payments to a business tool
Card payments, SEPA Direct Debit, subscriptions, deposits: building Stripe into a customer portal or business tool. Stripe’s public fees, the rules for a reliable integration, and the budget: the payment building block is $1,700 (€1,500)excl. VAT in my pricing.
Read →Single sign-on (SSO) with Microsoft 365 or Google
Your teams sign in to your business app with their Microsoft 365 or Google Workspace account: how it works, what it costs, and what to decide before development starts.
Read →Migrating your data from old software
Customers, products, history, invoices: how to move data out of old software without losing anything, how long it takes, and what is better left behind.
Read →Building an API to open your system to partners
Customers, distributors and carriers want to connect to your data without re-entering it: when an API is the right answer, what it costs, and how to secure it.
Read →Automating data flows between tools without Zapier
Zapier and Make are great stopgaps, until your automations become critical, numerous and expensive. When to switch to custom-built connectors, and at what price.
Read →Connecting your CRM and your website
Website leads land in a shared inbox, then get copied into the CRM by hand, when they are not lost altogether. How to connect the two properly, and what it costs.
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