# K-OS Billing Software Pricing, Alternatives & More 2026 | Capterra > With the help of Capterra, learn about K-OS Billing Software - reviews, pricing plans, popular comparisons to other Billing and Invoicing products and more. Source: https://www.capterra.com/p/10050643/K-OS-Billing --- # K-OS Billing Software Review 2026: Features, Reviews, Integrations, Pros & Cons Last updated on July 9, 2026 Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Description](#description)[Use cases](#use-cases)[Features](#features)[Pricing](#pricing)[Support](#support) K-OS Billing ## What is K-OS Billing? K-OS Billing is AI-powered invoicing and accounting software for SMBs, freelancers and accounting firms in Spain. Upload a photo or PDF and the AI classifies the document, extracts the data and calculates VAT automatically, with no manual entry. It is fully VeriFactu-compliant (Royal Decree 1007/2023): it generates chain-of-custody invoice records and reports to the Spanish tax agency (AEAT), validated and in production. It also includes automatic bank reconciliation, a tax engine that computes VAT, income tax and corporate tax (warning you before each deadline), accounting export, and a fiscal assistant that answers with verifiable citations from official sources. Built for accounting firms, it offers a multi-client dashboard to manage your whole portfolio, while your clients get a subsidised basic plan. Proprietary software, part of the K-OS ecosystem by Kavena Consulting. Plans from EUR 49.95/month, no lock-in. ## What is K-OS Billing used for? [Billing and Invoicing](https://www.capterra.com/billing-and-invoicing-software/) Overall rating Based on 0 user reviews Reviews sentiment Positive \- Neutral \- Negative \- Starting price €49.95 Flat Rate, Per Month Free trial not available Capterra Shortlist charts the highest-rated and most popular products... Our "Best of" badge program showcases products with the highest ratings... Our "Best of" badge program showcases products with the highest ratings... Do you work for K-OS Billing?[Manage this product listing](https://digitalmarkets.gartner.com/get-listed/claim-bx?url=https://kavenaconsulting.com/&name=K-OS Billing) ## Features Features with the highest number of reviews are displayed first. Those that have no reviews appear next, sorted alphabetically. AI Copilot A virtual assistant that uses AI to pursue goals and complete tasks on behalf of users Billing Portal Gateway through which end users can view past bills and pay current invoices Client Management Manage contact details and communication with clients Compliance Management Track and manage adherence to policies for any service, product, process, or supplier Credit Card Processing Accept and process credit card transactions Document Management Store, manage, and track all electronic documents in a centralized location K-OS Billing 21 features A virtual assistant that uses AI to pursue goals and complete tasks on behalf of users Gateway through which end users can view past bills and pay current invoices Manage contact details and communication with clients Track and manage adherence to policies for any service, product, process, or supplier Accept and process credit card transactions Store, manage, and track all electronic documents in a centralized location Compare new data with existing records to detect duplicate entries Encrypts data within the file, which can only be decrypted using a password or encryption key Use AI to generate content in the form of text, images, videos, etc. Create invoices from scratch or have recurring invoices Store and view prior invoices for each account/client Creation, processing, verification, and execution of invoices till the payment is made Verify, organize, manage & store enterprise data assets in a centralized repository Create, send, and view electronic invoices Business model that bills clients an amount based on the project/task/job performed Generate quotes or estimates for customers Receive data and information in real time Active reporting of data and metrics Automated process of charging customers at regular intervals for repeated access or use of a product or service Calculate tax and make deductions on gross income from sources like wages, investments or self-employment Streamlining repetitive tasks and activities through automated and predefined workflows Get Advice We can help you find the software with the features you need. ## Pricing Básico €49.95 Flat Rate,Per Month It includes: - Unlimited invoices (issuance + reception) - AI document processing (upload photo, invoice auto-accounted) - Automatic VAT (IVA), IRPF, and IS calculation - Intelligent bank reconciliation - Basic treasury management - 1 bank account, 2 users - VeriFactu compliance included - Quarterly fiscal reports - Chat fiscal AI (marked in lighter text, possibly limited or partial) - Forecasting and planning (lighter text) - Asset management (lighter text) - Accounting export (lighter text) Profesional €74.95 Flat Rate,Per Month It includes: - Includes all Básico features plus: - Unlimited bank accounts - 5 users - Fiscal forecasting and planning - Asset management and classification - Advanced fiscal deductions - Chat fiscal AI with 10 queries/month - Accounting export compatible with Sage and a3innuva Premium €119.95 Flat Rate,Per Month It includes: - Includes all Profesional features plus: - 15 users - Unlimited Chat fiscal AI (technical mode) - Legal citations from BOE, DGT, TEAC, CENDOJ - Priority support - Advanced metrics - Early access to new features Premium + Mercantil €149.95 Flat Rate,Per Month Connect with a Capterra advisor for a free 15-minute consultation Get a personalized software list aligned to your business needs with guidance from our expert advisors. Our team has helped 1 million+ businesses like yours find options that fit their needs. ## Support, customer service and training options Support - Email/Help Desk - FAQs/Forum - Knowledge Base - Phone Support - 24/7 (Live rep) - Chat Training - In Person - Live Online - Webinars - Documentation - Videos Deployment - Web - Android - iPhone/iPad Typical users - Freelancers - Small businesses - Mid size businesses - Enterprises ## Top-rated software of 2026 ### Fill out the form and we'll send a list of the top-rated software based on real user reviews directly to your inbox.