Contasimple or FacturaHub? In one line: Contasimple is a cheap Spanish invoicing and accounting tool focused on "compliance without overpaying", built on web forms. FacturaHub also has a free plan, but you operate it by talking — on WhatsApp, from Claude or the dashboard — with automatic IVA/IRPF and Modelo 303.
Contasimple wins if you want the cheapest possible option for basic invoicing and accounting from the browser and don't mind filling forms. It's a solid choice for those starting on a tight budget.
FacturaHub wins on speed and method: say "invoice Acme €2,000 for consulting" on WhatsApp and the invoice is created with 21% IVA, IRPF and PDF; snap a receipt and input IVA is added to your Modelo 303. No forms.
Both are ready for Verifactu (mandatory July 2027 for freelancers). The real choice: cheap forms (Contasimple) vs AI-operated invoicing, without forms and from anywhere (FacturaHub).
WhatsApp, Claude or dashboard. Contasimple is web forms.
Both have a free option; FacturaHub adds AI and multi-channel.
Output vs input IVA, boxes ready for the AEAT.
Receipt photo → input IVA instantly.
It is free: invoices, expenses, Modelo 303 and Verifactu unlimited, with AI, WhatsApp and API included. The only thing metered is AI (25 free actions per month); if you need more, one-off token packs.
Yes, automatically from your invoices and expenses, with boxes ready for the AEAT.