Involy

Involy is an online invoicing service designed for freelancers and small businesses seeking a straightforward, affordable way to manage billing. Users can create invoices, generate downloadable PDFs, and access their documents without installing software; data is automatically backed up. An AI assistant can help create or correct invoices, generate PDFs, and answer questions about billing or VAT through text or voice, asking for confirmation before taking action.

Involy offers a free plan for up to 24 invoices per year, monthly or yearly subscriptions, and pay-per-invoice pricing. Depending on the plan, features include unlimited invoicing, API access, and company branding options such as logos and custom invoice templates. The service supports invoices in English, Spanish, Portuguese, French, German, and Italian, and allows billing in any currency.

Involy also provides a REST API for integration with other systems. For Spanish tax residents, the site states that the service is compatible with Verifactu, including invoice QR codes for authenticity verification