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Scell.io vs Pennylane
Pennylane's REST API vs Scell.io's API-first approach
Pennylane is a French accounting and invoicing platform that opened a public REST API in 2023. Main target: accounting firms and SMBs. The API covers invoices, quotes, contacts, and accounting export, but remains centred on internal use of the accounting software. Scell.io is purely API-first with a developer focus (PHP/JS SDKs, MCP agent, native multi-tenancy). Where Pennylane offers a full suite of accounting+invoicing+bank reconciliation, Scell.io focuses on the Factur-X e-invoicing and eIDAS signature layer, designed to integrate into an existing stack.
Key facts
- Pennylane: full SaaS suite (accounting + invoicing + banking), REST API as complement
- Scell.io: API-first, no general accounting, focus on e-invoicing + signature
- Pennylane SDKs: no official SDK, OpenAPI doc only
- Scell.io SDKs: PHP, TypeScript, MCP agent for LLMs, Postman collection
- Pennylane: no multi-tenancy for IT services companies (1 account = 1 company)
- Scell.io: native multi-tenancy (tenant + sub-tenant) designed for B2B2B
Code example
// Scell.io — création facture Factur-X B2C avec BR-CO-26 auto
import { Scell } from '@scell/sdk';
const scell = new Scell({ apiKey: process.env.SCELL_SK });
const invoice = await scell.invoices.create({
format: 'factur-x',
buyer: { is_individual: true, name: 'Marie Dupont' },
seller: { siret: '12345678901234', name: 'Ma SAS' },
lines: [{ description: 'Prestation', quantity: 1, unit_price: 1000, vat_rate: 20 }],
});
console.log(invoice.factur_x_url);