Kolleno Payments
Your invoicing software should work as hard as you do. From recurring invoices to real-time payment processing, the best electronic invoicing (e-invoicing) tools don’t just help you create invoices—they help you scale.
We’ve reviewed the top e-invoicing software for 2025 to help you find the right fit. Whether you’re a small business needing a free invoicing tool or an enterprise looking for seamless integration with your accounts receivables software, this list has something for you.
What is E-Invoicing Software?
E-invoicing software automatically creates, sends, and processes digital invoices between buyers and suppliers. It replaces paper invoices and manual data entry with faster, more accurate workflows. Businesses use e-invoicing tools to take control of their invoicing process—cutting down on admin, improving payment tracking, and getting paid faster.
The right automated invoicing solution lets you manage invoices in one place. You can customise invoice templates, schedule recurring invoices, accept online payments, and set up automated payment reminders. Many platforms also integrate with your accounting software, reducing errors and giving you real-time financial visibility.
E-invoicing software also supports tax compliance and protects sensitive invoice data. It helps businesses stay on top of regulatory demands, reduce fraud risks, and build audit-ready records from day one.
Put simply, e-invoicing systems simplify the billing process and help you stay ahead.
The Best E-Invoicing Software
With dozens of invoicing tools on the market, choosing the right e-invoicing solution can feel overwhelming.
In this section, we break down ten of the top e-invoicing tools for 2025. Each one offers a different mix of features, from automated payment reminders and approval workflows to seamless integration with your accounting software. Whether you’re a small business looking for a free invoicing tool or a growing company ready to scale, there’s a solution here for you.
| Tool | Ideal For | Key Features | G2 Rating (*) |
| Kolleno | Every size of business | AI collections, payment portal, ERP integration, real-time analytics | 4.9* |
| SAP Concur | Large enterprises | Invoice capture, mobile access, ERP integration, spend visibility, fraud tools | 4* |
| Airbase | Mid-sized companies | AP automation, approval workflows, AI matching, multi-currency support | 4.7* |
| Keap | Small businesses | CRM with invoicing, recurring payments, online payments, mobile app | 4.2* |
| Stampli | Collaborative AP teams | AI invoice capture, approval workflows, ERP integration, audit trails | 4.6* |
| Webexpenses | Expense-heavy businesses | Online approvals, customizable templates, real-time tracking | 4.4* |
| BILL AP/AR | SMBs | Invoice creation, payment portal, real-time tracking, PCI compliance | 4.4* |
| Pleo | Finance teams | Full invoice management, real-time tracking, accounting integration | 4.7* |
| SAP S/4HANA Cloud | Large enterprises | High-volume invoicing, AR/AP automation, unified subledger | 4.5* |
| Corpay Cross-Border | International operations | Global invoice processing, cross-border payments, compliance | 4.6* |
1. Kolleno
Kolleno is an AI-powered accounts receivable platform designed to automate and optimize the collections process. It offers a firm-branded customer portal, allowing clients to choose payment methods and access invoices and statements. The platform’s automation handles a significant share of payment matching and application, enhancing efficiency.
Ideal For: Businesses aiming to improve cash flow management through automated collections and payment processing.
Key Features:
- AI-driven collections management
- Branded customer payment portal
- Automated payment matching and application
- Integration with various ERP systems
- Real-time analytics and reporting
G2 Rating: 4.9*
2. SAP Concur
SAP Concur offers a comprehensive platform that automates invoice management from capture to payment. It integrates seamlessly with travel and expense tools, providing businesses with real-time visibility into spending. The system supports mobile access, allowing users to manage invoices on the go, and integrates with various ERP systems for streamlined operations.
Ideal For: Large enterprises seeking integrated expense, travel, and invoice automation.
Key Features:
- Automated invoice capture and processing
- Mobile-friendly, cloud-based platform
- Integration with travel and expense management
- Real-time spend visibility and control
- Compliance and fraud detection tools
- Seamless ERP integrations
G2 Rating: 4*
3. Airbase
Airbase combines accounts payable automation, expense management, and corporate cards into a single platform. It offers features like automated approval workflows, real-time reporting, and multi-currency support. The system’s AI-driven invoice matching and automatic GL coding reduce errors and streamline the financial close process.
Ideal for: Mid-sized companies aiming for unified spend management.
Key Features:
- Unified platform for AP automation, expense management, and corporate cards
- AI-driven invoice matching and GL coding
- Automated approval workflows
- Real-time reporting and analytics
- Multi-currency and multi-entity support
- Seamless integrations with popular accounting software
G2 Rating: 4.7*
4. Keap
Keap is a CRM and automation platform tailored for small businesses. It offers invoicing features that allow users to create, send, and track invoices, set up recurring payments, and accept online payments via credit card or PayPal. The platform also includes automation tools to streamline follow-ups and payment reminders.
Ideal for: Small businesses seeking CRM with invoicing capabilities.
Key Features:
- CRM with integrated invoicing and payment processing
- Recurring payment setup
- Online payment acceptance (credit card and PayPal)
- Automated follow-ups and reminders
- Mobile app for on-the-go management
- Customizable invoice templates
G2 Rating: 4.2*
5. Stampli
Stampli focuses on streamlining the accounts payable process through collaboration and automation. Its AI assistant, Billy the Bot, automates invoice capture, coding, and approval workflows. The platform centralizes communication around invoices, reducing errors and speeding up approvals. Stampli integrates with various ERP systems, ensuring a smooth workflow without requiring changes to existing processes.
Ideal for: Businesses seeking collaborative AP automation.
Key Features:
- AI-powered invoice capture and processing
- Centralized communication hub for invoice-related discussions
- Automated approval workflows
- Duplicate invoice detection
- Seamless ERP integrations
- Comprehensive audit trails
G2 Rating: 4.6*
6. Webexpenses
Webexpenses offers a comprehensive platform for managing expenses and invoices. It enables teams to submit, approve, and process invoices online, significantly reducing manual accounts payable processes. The system integrates seamlessly with existing financial software, facilitating a smooth transition and efficient workflow.
Ideal For: Businesses seeking to digitize and streamline their expense and invoice management processes.
Key Features:
- Online submission and approval of invoices
- Automation of up to 90% of manual AP processes
- Seamless integration with existing financial systems
- Customizable invoice templates
- Real-time expense tracking and reporting
G2 Rating: 4.4*
7. BILL AP/AR
BILL AP/AR simplifies the invoicing process by allowing users to create, send, and manage invoices efficiently. The platform supports automation at scale, enabling faster payments through an intuitive customer portal that accepts credit cards and ACH transfers.
Ideal For: Small to medium-sized businesses seeking to automate their invoicing and payment processes.
Key Features:
- Automated invoice creation and management
- Customer payment portal with multiple payment options
- Integration with accounting software
- Real-time tracking of invoice statuses
- Enhanced security with PCI compliance
G2 Rating: 4.4*
8. Pleo
Pleo provides an automated accounts payable solution that streamlines the entire invoicing process. Users can capture, process, approve, pay, and bookkeep invoices within a single platform. The system is designed to save time on tedious tasks, automate approval processes, and track invoices in real time.
Ideal For: Companies looking for a user-friendly platform to manage invoices and expenses efficiently.
Key Features:
- Comprehensive invoice management from capture to payment
- Real-time tracking and categorization of expenses
- Automated approval workflows
- Integration with accounting systems
- User-friendly interface for finance teams and employees
G2 Rating: 4.7*
9. SAP S/4HANA Cloud
SAP S/4HANA Cloud offers a robust solution for contract accounting and invoicing, supporting high-volume invoicing, consumption, and subscription billing. The platform enhances accounts receivable and payable throughput with automated processes and a unified subledger, improving traceability and compliance.
Ideal for: Large enterprises requiring scalable and compliant invoicing solutions.
Key Features:
- Support for high-volume invoicing and billing
- Automated accounts receivable and payable processes
- Unified subledger for improved financial management
- Integration with SAP S/4HANA Finance
- Enhanced compliance and traceability features
G2 Rating: 4.5*
10. Corpay Cross-Border
Corpay Cross-Border provides a global invoice automation solution, allowing businesses to process international payments directly from invoices, spreadsheets, or documents. The platform improves the overall accounts payable process by automating invoice capture, reading, and routing, offering a fail-safe electronic paper trail.
Ideal For: Businesses dealing with international transactions seeking to automate and streamline their cross-border payments.
Key Features:
- Automation of invoice processing from various sources
- Direct processing of international payments
- Robust payment tracking technology
- Integration with existing financial systems
- Enhanced compliance with global payment standards
G2 Rating: 4.6*
What to Look for in an E-Invoicing Tool
Not all e-invoicing software is created equal. The best tools do more than just generate e-invoices—they help you manage cash flow, reduce manual processes, and stay compliant with tax regulations. Whether you’re switching from paper invoices or upgrading your existing invoicing software, it’s worth knowing which features actually move the needle.
Below are the key characteristics to prioritise when choosing an e-invoicing tool.
1. Automated Approval Workflows
Manual sign-offs slow down the billing process and increase the risk of errors. Look for a tool that allows you to customise and automate your approval workflows. This ensures every e-invoice gets reviewed and processed promptly, without the endless email chains.
2. Seamless Integration with Accounting Software
Your e-invoicing solution should work hand-in-hand with your existing accounting tools. Integration reduces the need for manual data entry, keeps your records up to date, and supports faster bank reconciliation.
3. Customisable Invoice Templates
Branded, professional e-invoices build trust and reduce confusion. The right tool will let you customise invoice templates with your logo, payment terms, and itemised charges—so every e-invoice reflects your business.
4. Online Payments and Payment Processing
The faster you let customers pay, the faster you get paid. Choose a tool that accepts online payments via card, bank transfer, or wallet—and supports automatic payment processing directly from the e-invoice.
5. Automated Payment Reminders
Chasing overdue e-invoices is time-consuming. Look for software that sends automated payment reminders at set intervals, helping you get paid on time without lifting a finger.
6. Tax Compliance and Security
Staying compliant with e-invoicing regulations and tax authorities is non-negotiable. Your chosen tool should support local tax reporting rules and protect sensitive invoice data through encryption and secure access controls.
7. Real-Time Reporting and Financial Visibility
Being able to track paid, pending, and overdue e-invoices at a glance gives you better control over your cash flow. Prioritise tools that offer clear dashboards and real-time reporting features.
8. Support for Recurring Invoices
If you run a subscription-based business or bill clients on retainer, recurring e-invoices are a must. This feature helps you automate regular billing and reduce repetitive admin.
Why Kolleno is the Best E-Invoicing Software on the Market
Plenty of tools help you send e-invoices. Kolleno helps you get paid.
Designed for finance teams who want more control and less admin, Kolleno combines powerful invoicing capabilities with intelligent automation. It doesn’t just create e-invoices—it manages the entire invoicing process from start to finish. With a customer-branded portal, automated payment reminders, and smart payment matching, Kolleno removes friction from every step of the billing process.
What sets Kolleno apart is its focus on cash flow and collections. While most e-invoicing platforms stop at invoice creation, Kolleno goes further—tracking online payments, sending tailored reminders, and prioritising overdue invoices with built-in workflows. Its AI engine handles routine tasks so your team can focus on high-impact work.
Kolleno also integrates seamlessly with leading accounting software, meaning you can manage invoices, payment processing, and financial reporting in one place, without switching between tools or risking manual data entry errors.
If you’re looking for an e-invoicing solution that boosts financial visibility, improves collections, and keeps your invoice data accurate and secure, Kolleno is the one to beat.
Final Thoughts
E-invoicing software offers a smarter way to run your business. The right tool helps you manage invoices more efficiently, reduce manual work, and get paid faster. Whether you’re chasing overdue invoices, juggling approval workflows, or just trying to stay on top of your cash flow, the tools you choose matter.
Kolleno brings everything together in one platform—automation, visibility, and seamless payment processing. If you’re looking for an e-invoicing platform, you’ve come to the right place.
Ready to see it in action? Book a demo and discover how Kolleno can transform your invoicing process.
