Top PayPal Alternatives

FreshBooks simplifies the invoicing and billing process for small enterprises. Renowned as a leading accounting and invoicing solution, FreshBooks caters to both self-employed individuals and small businesses alike. By streamlining invoicing and billing tasks, it enables companies to focus on their passions and core activities. Its extensive array of robust features encompasses expense tracking, time management, and payment processing capabilities. Moreover, the FreshBooks mobile application empowers users to manage their finances from any location, enhancing flexibility and productivity. This combination of features and convenience makes FreshBooks an invaluable asset for any small business.

AvidXchange revolutionizes payment processes for businesses, enabling them to concentrate on their core priorities. Our accounts payable (AP) solutions empower clients to enhance efficiency, transparency, and authority within their AP workflows. Enhance Efficiency: Expedite the approval of invoices and minimize administrative burdens, allowing team members to engage in more critical initiatives. Boost Transparency & Authority: Achieve immediate insights into the status of invoices and payments while crafting personalized workflows to align with your approval requirements. Access Anytime, Anywhere: Enhance productivity and eliminate delays by managing AP responsibilities around the clock. Moreover, AvidXchange, Inc. operates as a licensed money transmitter for B2B payments across the U.S., holding a Money Transmitter license from the New York State Department of Financial Services, along with other states necessitating such a license. This extensive regulatory compliance underscores our commitment to secure and reliable financial transactions.

Mollie serves as a comprehensive money management solution for more than 250,000 businesses, ranging from startups to large enterprises. This all-in-one platform streamlines financial processes, enabling users to handle online and in-person payments, subscriptions, financing, reconciliation, invoicing, and fraud prevention seamlessly. Here’s how Mollie can enhance your business operations: – Manage both online and offline transactions effectively using a single platform. – Improve conversion rates by offering over 35 payment methods, featuring both global giants and local favorites. – Increase revenue and establish customer trust with a checkout flow that is optimized for conversion. – Utilize a unified dashboard to oversee payments, gain valuable insights, access funding options, and simplify accounting tasks. – Accelerate your payment collection by dispatching payment requests and customized invoices effortlessly. – Benefit from swift and flexible business funding options up to 350k with clear pricing and adaptable repayment plans. Begin your journey today with straightforward pricing, no hidden charges, and no commitment contracts, ensuring a hassle-free experience from the start.

BILL is a leading provider of cloud-based software that simplifies, digitizes, and automates back-office financial processes for small and mid-sized businesses. Our customers come from all industries, ranging from startups to established brands and nonprofits to franchises.

The latest benchmark in digital payments is set by Stripe, which stands out as the premier platform for conducting online business. Across the globe, progressive enterprises rely on us to manage billions in transactions each year. Stripe develops highly adaptable and robust tools tailored for online commerce. Whether launching a subscription model, an on-demand marketplace, an e-commerce website, or a crowdfunding initiative, our well-crafted APIs and exceptional features empower you to deliver an outstanding experience for your customers. By enabling countless tech-driven companies to grow at unprecedented speeds and efficiency, Stripe is at the forefront of innovation. We view payment systems as a coding challenge rather than a financial issue, focusing on creating elegant, modular solutions that facilitate strong, scalable, and flexible integrations. Our user-friendly approach simplifies complex processes by eliminating unnecessary obstacles and distractions, ensuring that businesses can focus on their core mission without getting bogged down in technical difficulties. In a constantly evolving digital landscape, Stripe continues to adapt and enhance its offerings to meet the diverse needs of its users.

Melio serves as a streamlined accounts payable solution aimed at enhancing bill payment processes, optimizing operational workflows, and boosting cash flow management for businesses of all sizes. To get started, try all of Melio's features free for 30 days! Melio’s platform enables users to make payments to vendors via online bank transfers or credit and debit cards, even when those vendors only accept checks, which not only helps in managing cash flow but also allows users to earn rewards. Melio integrates seamlessly with accounting software such as QuickBooks and Xero, ensuring that your financial records remain current. With Melio, you’ll get to streamline your day-to-day work. Either input vendor information or bill details manually, upload documents, or take a photo of the invoice for quick processing—it’s incredibly user-friendly. Payments can be scheduled in alignment with your cash flow strategy, and Melio will make those payments happen. International vendors? Our platform facilitates payments to global vendors in USD or the local currency, ensuring smooth transactions for various services and products. This comprehensive approach makes managing accounts payable more efficient and less stressful than ever before. Finally, no matter where your business takes you, Melio can follow—just be sure to download the mobile app, available on iOS and Android, to manage your business payments on the go.

Quickly and effortlessly accept all types of payments with a focus on security and simplicity. Whether you're selling in-store or online, processing card payments is seamless and straightforward. The invoicing process can be efficiently managed, allowing for easy creation, sending, and tracking. If your customer isn't present, remote credit card transactions can be processed over the phone or through your computer. Square simplifies the experience of establishing and expanding your online store, enabling you to receive payments smoothly. With Square, accepting card payments is designed to be fast, secure, and hassle-free, ensuring there are no hidden fees or lengthy contracts involved. Trust in the reliability of rapid and secure payment processing to enhance your business operations. Additionally, you can focus on what you do best while leaving the complexities of payment handling to Square.

PBRS is a powerful third-party application that significantly boosts the capabilities of Power BI reports by offering sophisticated options for scheduling, automation, and distribution. With PBRS, users can set Power BI reports to run at designated times or establish repeating schedules tailored to their needs, such as executing a report hourly, bi-daily, or on specific days like the third Monday of each month. Furthermore, it allows for the automation of report generation in response to particular triggers or conditions, such as changes in a database, incoming data through a port, the existence of unread emails in designated folders, or the presence of specific files. In addition, PBRS facilitates the distribution of Power BI reports in a variety of formats—including Excel, PDF, or CSV—to multiple destinations, enabling users to apply unique filters and select recipients for each scheduled report. This extensive flexibility in report distribution ensures that the specific requirements of organizations are effectively met. Moreover, PBRS integrates smoothly with different Power BI environments, encompassing Power BI Service (Pro and PPU), Power BI Report Server (On-Premises), Power BI Premium, and all versions of SQL Server Reporting Services, making it a versatile tool for any reporting needs.

Sila operates a comprehensive payment platform that delivers Banking-as-a-Service via a developer-centric payment API, ensuring scalability and enabling quick, secure money transfers. This platform simplifies the process of creating and launching fintech applications and integrated payment solutions across various sectors, including finance, cryptocurrency, and Web3. Among Sila's features are Virtual Accounts, Digital Wallets, KYC/KYB services, and ACH payment APIs tailored for software development teams. Furthermore, additional capabilities can be accessed through a range of pre-approved, integrated partners, each providing varying levels of support. Sila’s excellence in the industry was highlighted when it received the Best Payments as a Service Platform award at the 2022 Embedded Banking Awards by Tearsheet. The company operates out of Portland, Oregon, and continues to innovate in the financial technology space.

Balance is the pioneering self-service checkout solution that effectively handles all B2B payment intricacies. This encompasses a variety of payment methods, including wires, checks, SaaS subscriptions, automatic vendor payouts, milestone payments, net terms, and more. Designed with an API-first approach, it provides seamless access to documentation for integration. You can accept a multitude of payment types, such as wires, ACH, credit cards, and checks. With instant and risk-free net terms, customers can enjoy payment terms of net 30 or 60 days, while you receive your funds immediately. Recurring payments are made effortless, allowing for simple management of ongoing invoice payments akin to standard credit card transactions. Balance is tailored to meet the diverse needs of B2B payments, making it an excellent choice for marketplaces, wholesalers, merchants, SaaS providers, and service-oriented businesses. With self-serve invoicing, customers can conveniently access and settle their invoices with just a click, enhancing user experience. Additionally, the system automates reconciliation and collections, leaving behind the outdated manual processes that many businesses still rely on today.

HoneyBook simplifies the process for solo entrepreneurs to interact with their clients, oversee projects, and receive payments seamlessly within a single platform. By utilizing our business management software, you can streamline your administrative tasks and keep track of your responsibilities, ultimately conserving both time and financial resources to foster your business growth. It functions much like a personal assistant dedicated to your needs. Equipped with features such as proposals, invoices, contracts, payment processing, and scheduling, HoneyBook provides all the essential tools required to ensure your clients have a remarkable experience. In doing so, it empowers you to focus on what truly matters—building lasting relationships with your customers.

Blockonomics serves as a decentralized payment solution that allows e-commerce platforms to process bitcoin transactions directly to their wallets without requiring any KYC verification, and it imposes no restrictions on the BTC amounts that can be received. Getting set up is incredibly quick, taking less than five minutes, and you can create a seamless checkout experience that aligns with your website's design, all while ensuring that there are no redirects during the payment process, which enhances security. The platform supports a wide array of popular website builders, including WordPress, Prestashop, Open Cart, and WHMCS, and it features a payment API for those looking to customize their websites further. Additionally, Blockonomics provides versatile options, such as payment buttons for embedding on customized sites and easily shareable payment links for online distribution. Users can also take advantage of services like bitcoin invoicing and access to a block explorer to track transactions. To help you navigate the platform, a variety of tutorials in both blog and video formats are available, alongside 24/7 live support to address any questions or concerns you might have. Blockonomics operates with a modest fee structure of 1% on all transactions, while the first 20 transactions are completely free of charge. Begin your journey by downloading the free plugin today and unlock the potential of bitcoin payments for your store.

Advanced Payment Processing Gateway Equipped with Enterprise-Level Capabilities and Instantaneous Analytics. This platform ensures seamless transactions while providing businesses with valuable insights in real-time.

BlueSnap's comprehensive Accounts Receivable Automation solution is highly acclaimed as the top software for processing payments, managing billing and invoicing, overseeing recurring billing, and handling subscription services. With our intuitive invoice editor, seamlessly integrated into your accounting framework, you can design visually appealing invoices while also creating a customer portal that facilitates automatic charging, the collection of payments, and the imposition of late fees. For rapidly expanding businesses around the globe, BlueSnap provides robust subscription management and recurring billing functionalities, allowing you to set up trial periods, effectively manage ongoing subscriptions, and implement proration as needed. Additionally, BlueSnap supports a wide range of payment processing options, accommodating credit card transactions, ACH and SEPA transfers, as well as wire payments, while efficiently managing partial payments, automatically retrying failed transactions, and recovering payments without hassle. Our solution is designed not only to enhance operational efficiency but also to improve the overall payment experience for both businesses and their customers.

Affirm provides a payment-over-time solution that eliminates financial obstacles for consumers, enabling merchants to experience an impressive 85% boost in average order values and a 20% increase in repeat purchasing. This mobile-optimized, multichannel platform is designed for seamless integration in various settings, including e-commerce, physical stores, and telesales, equipping merchants with the essential tools to offer flexible payment options to their customers. The process is straightforward: first, customers must share a few crucial details for an instant decision. They have the freedom to select their preferred payment plan, with options available from 3 to 36 months, allowing for greater financial flexibility. Additionally, Affirm ensures a swift settlement within one day while assuming all risks associated with fraud and expensive chargebacks, effectively alleviating any concerns for merchants. This risk-free environment encourages businesses to adopt innovative payment solutions without the fear of potential losses.

Discover a global cryptocurrency payment solution that is not just user-friendly but also reliable and simple to implement. Boost your revenue while effectively fighting fraud with a tailored on-and-off-ramp that provides seamless experiences for users around the globe. MoonPay acts as a vital support system for top cryptocurrency wallets, applications, and websites by offering a holistic payment solution. Customers can effortlessly make immediate bank transfers via Open Banking in the UK and EU, with ACH support expected soon. Our intuitive KYC process streamlines the onboarding journey, enabling you to broaden your user base while tackling the significant challenges that often lead to customer attrition. The cutting-edge pass-through KYC feature guarantees that your existing data is integrated smoothly, eliminating the need for customers to verify their identities repeatedly. With thorough testing performed across various integrations, we have assembled all the essential resources to ensure a swift and hassle-free payment setup. This allows you to concentrate on what is truly important—expanding your business and effectively meeting the needs of your customers. Ultimately, our solution not only simplifies payments but also enhances customer satisfaction and loyalty in an increasingly competitive market.

Lumanu is a no-cost application designed for individuals in the creator economy, such as freelancers, photographers, podcasters, influencers, and graphic designers. In addition, we provide payables software for businesses collaborating with creators, including agencies, talent managers, and brands. Our platform integrates payments and whitelisting solutions into a single, comprehensive service, simplifying the financial processes for both creators and businesses. This allows for smoother transactions and enhanced collaboration within the creative community.

With Lydia, you receive a current account that includes a French IBAN and a Visa card, streamlining your day-to-day financial activities. Enjoy the perks of free international transactions, a competitive interest rate of 0.6% on savings, secure online payments, and quick access to loans, all managed seamlessly through the Lydia app. Acting as a contemporary substitute for traditional banking platforms, Lydia is designed for individuals who value an innovative aesthetic and a unique mobile interface for effortlessly tracking and managing their finances. The app not only provides a clear and intuitive user experience but also offers full customization options, allowing users to tailor their interactions according to personal preferences. Furthermore, you can enhance your financial organization by adding images to your cards, accounts, and receipts, combining efficiency with visual appeal. This high degree of personalization ensures that your banking experience is not just functional but also aligns perfectly with your specific requirements and style. With Lydia, modern banking becomes not only easier but also more enjoyable.

Mercado Fondo allows you to earn returns while ensuring your funds are always accessible. You can instantly transfer money to any bank or digital account, enabling immediate access to your funds. A free Mercado Pago card is available for global purchases and cash withdrawals. You have the autonomy to set the interest rate you pay, with options ranging from 0% to 6.79% per sale, allowing you complete control over your financial choices. Managing your finances, overseeing collections, and tracking daily sales is straightforward and efficient. You can assign permissions to your team members according to their roles, providing you with comprehensive oversight of transactions. Each point of sale can be tailored to meet your specific requirements, letting you dictate payment methods, metrics to monitor, and authorized personnel at each location. This service is designed to support your business through all stages of growth and operations, ensuring you maintain control at your fingertips. By utilizing Mercado Fondo, you can navigate the complexities of the market with enhanced confidence and flexibility, making it an essential tool for any business owner. Ultimately, it fosters a responsive environment that can adapt to the ever-changing demands of your industry.

We provide comprehensive solutions for both in-person and online payment processing tailored to your business needs, allowing for effortless management of one-time and recurring payments through a variety of methods, including Visa, Mastercard, American Express, and Discover, encompassing credit, debit, prepaid, and ACH transfers. Our advanced security protocols, enhanced by our unique tokenization technology, ensure that your customers' sensitive payment details are protected not only during transactions but also when stored for future use. Facilitating credit card, debit card, and ACH payments has never been simpler, as our swift payment solutions are readily accessible. You have the flexibility to select from multiple payment options, giving you the power to dictate how and when you make payments, whether for on-demand services or reimbursements—you set the schedule. With forward-thinking tools aimed at optimizing your cash flow, your business can grow more rapidly while remaining agile for unexpected costs or new initiatives. The integration of robust software equipped with sophisticated features enhances your ability to efficiently manage financial transactions, positioning you for success. Ultimately, this all-encompassing solution not only simplifies your payment processes but also allows you to concentrate on expanding your business while achieving your financial goals. This proactive approach to payment management ensures that you are always ahead in a competitive market.

Meta Pay offers a convenient and secure payment solution that is compatible with numerous platforms. It allows users to send money, shop, or support various causes through the apps they regularly engage with. You can easily purchase items from your favorite brands available on Facebook Shop or explore unique products from local vendors on Marketplace. By adding your preferred payment method just once on Facebook, you can also connect Facebook Pay to other apps you frequently use. When you see an intriguing product or content from a brand or creator on Instagram, making a purchase is as simple as a click, without needing to exit the app. Plus, sending money to friends and family is as straightforward as sending a message, entirely free of fees and without interrupting your chat. This seamless integration across different platforms significantly streamlines the online shopping experience. Overall, Meta Pay's versatility makes it an invaluable tool for everyday transactions.

Escrow.com stands out as the premier payment service for domain name transactions, having successfully completed sales for notable websites like uber.com, snapchat.com, spacex.com, twitter.com, instagram.com, freelancer.com, gmail.com, slack.com, wechat.com, chrome.com, and wordpress.com. In addition to domain names, Escrow.com is essential for facilitating the acquisition of classic cars, used sailboats, and even aircraft engines, ensuring secure monetary exchanges and safe delivery for each deal. The experienced team at Escrow.com is also on hand to help with important documentation such as shipping papers, titles, and liens, providing an extra layer of support for customers. Furthermore, Escrow.com oversees transactions involving large computer systems, professional audio setups, and a variety of electronic gadgets, whether they are small components or high-end luxury goods. This enables buyers and sellers to confidently engage in international trade, all supported by the robust security measures that Escrow.com offers. By utilizing their all-encompassing services, customers are able to navigate intricate sales processes while maintaining peace of mind every step of the way, making Escrow.com a trusted partner in both ordinary and extraordinary transactions.

Digistore24 is an all-in-one sales platform designed to help entrepreneurs, businesses, and affiliates effortlessly sell and scale digital products, software, services, events, books, and more. With fully automated back-office functions, advanced conversion tools, and a powerful international affiliate network, the platform allows users to focus on what truly matters: growing their business. Sounds expensive? It’s not. Fees are only incurred when a sale is made – with zero upfront costs, no hidden charges, and performance-based results. As Europe’s largest affiliate network, Digistore24 provides access to thousands of high-performing partners ready to promote relevant offers. Automated payouts and German-grade reliability ensure that business operations run like clockwork. The TÜV-certified platform is built with security and stability at its core. With the GDPR compliance, all user and customer data remains secure and protected at all times. The Digistore24 mobile app gives users full control over their sales processes from anywhere – allowing seamless management of transactions, voucher codes, e-tickets, affiliate campaigns, and more on the go. The integrated member area and course builder Digibiz24 enables users to create communities and complete online courses that are fully optimized for seamless integration with their products. Behind the scenes, the in-house IT specialists continuously develop and optimize the platform to ensure industry-leading performance. Digistore24 is more than just software – it is a long-term partner for scalable, secure, and sustainable business success.

Discover a revolutionary shopping experience with Klarna, where personalized recommendations, exclusive deals, and diverse payment options await you. Our services are exclusively accessible via the Klarna app, making it a preferred choice for shoppers nationwide. Renowned American brands leverage Klarna to elevate their customers' shopping experiences, guaranteeing a seamless journey from start to finish. We take pride in delivering the most efficient shopping experience available, with our extensive range of payment methods outshining those of any competitor. This results in higher conversion rates and increased cart sizes for your business. You receive full payment instantly, while your customers benefit from the convenience of deferred payments. Collaborating with Klarna goes beyond merely adopting modern payment solutions; we are committed to enhancing the overall shopping experience for your clients. Our expansive global reach means that no matter where your business operates, you can provide payment options tailored to local customer preferences, fostering happiness for your customers alongside your products, which ultimately cultivates increased satisfaction and loyalty in the long run. Additionally, Klarna continuously seeks to innovate its offerings, ensuring that both merchants and shoppers have access to the best possible tools for an enjoyable shopping experience.

Our team is committed to creating APIs that facilitate the smooth integration of our offerings into your B2B software or web platforms. We work hand in hand with business stakeholders, software developers, ERP providers, and CRM companies to furnish them with financial services and products that can be rebranded and seamlessly embedded within their technological frameworks. As one of the select payment aggregators providing support every day of the week for issues and complaints, we guarantee that our end customers experience high success rates. This is made possible through our solid technological foundation, paired with partnerships with top acquiring gateways and banks. In addition, we offer technical support for handling customizations and assist merchants with any API integration challenges they may face. The APIs from our system are engineered for swift integration, needing only a few lines of code to be incorporated into websites and mobile apps, thus making the process both efficient and user-friendly. Moreover, our dedication to continuous support means users can count on us for help whenever they require it, ensuring a reliable and responsive experience. We believe that by fostering strong collaborations and offering exceptional service, we can empower our partners to thrive in their respective markets.

Effortlessly streamline your payment processes with Easy Pay Direct, a trusted ally in secure transaction management. Our expertise lies in providing all-encompassing merchant solutions that alleviate your worries about account freezes, suspensions, and surprise fees, allowing you to concentrate on growing your business. Designed to enhance your operational efficiency, Easy Pay Direct focuses on convenience, supported by our dedicated team and cutting-edge technology. We recognize the challenges faced by entrepreneurs and deliver tools that are both powerful and easy to use. Managing credit card transactions should be seamless, which is why our system integrates effortlessly with over 250 online marketplaces, accommodates recurring payments, provides solutions for declined transactions, assists in chargeback disputes, facilitates custom payment URLs, and delivers outstanding personalized support. Our support team is always available to help you via phone, message, or email, ensuring you have the assistance you need when managing your payments. Join a community of successful entrepreneurs like Grant Cardone, Frank Kern, Wes Watson, and Fortune Builders who have chosen Easy Pay Direct for their payment processing solutions, and experience the difference for yourself.

Eventbrite serves as a comprehensive event technology and ticketing service that enables businesses to offer tickets online while assisting individuals in discovering events that ignite their interests. The platform accommodates a wide array of events, ranging from intimate workshops to large-scale concerts, conferences, and prestigious film and music festivals. Accessible through both web and mobile applications, Eventbrite effectively manages everything from simple registration processes to intricate event coordination. Recently launched, Eventbrite Boost is tailored specifically for events, providing a unified platform for marketing and event oversight. This feature empowers users to reach a larger audience and streamline management tasks from a single interface. With the ability to produce eye-catching marketing materials effortlessly, Eventbrite enhances the legitimacy of your event presence. Additionally, its intelligent marketing tools, which improve with each use, are designed to save time and reduce costs, ensuring your event gains visibility and attracts more attendees. Ultimately, utilizing these user-friendly promotional resources can significantly amplify the reach and registration rates of your events.

Patrons can conveniently and economically support your creative projects for the price of a regular coffee. Through Ko-fi, you can accept payments directly without incurring any fees, enabling you to generate income in a way that aligns with your personal lifestyle, free from the limitations of traditional publishing timelines. You have the opportunity to engage with individuals who value your work through their donations and feedback, enriching your connection with your audience. Display your best artworks and share the stories behind your creative process, allowing fans to purchase unique, handcrafted items made specifically for them. By fostering connections with your most dedicated supporters, you can develop a reliable monthly revenue stream. Customizing your page and showcasing your portfolio can be done in mere moments, and promoting your page along with your funding goals on social media can significantly broaden your audience. Ko-fi allows you to benefit from direct financial contributions and uplifting messages while steering clear of transaction costs. This platform ultimately gives you the freedom to concentrate on your artistic passions, while also ensuring a steady income flow that supports your initiatives. By utilizing Ko-fi, you can create a vibrant community around your work, making your creative journey even more fulfilling.

Streamline payment processing, create complimentary online shops, oversee shipping logistics, secure funding, and access a variety of tools to enhance your business efficiency. With the services offered by Instamojo, you can seamlessly accept online payments, establish your own free storefront, acquire domains, and benefit from mailbox services, all designed to launch your business effectively. Manage transactions, orders, inventory, and customer data through a single, user-friendly interface. You can easily track payments, shipments, and leads from both mobile devices and desktop computers. Furthermore, you have the opportunity to secure cash flow loans, utilize growth and marketing tools, and take advantage of numerous free online business solutions to boost your revenue and expand your customer base. The Instamojo app for Android introduces additional features that empower your business even further! Instantly access your Instamojo links for quick sharing, and effortlessly handle shipment scheduling and payment management. Accelerate your payout timelines while also checking your qualifications for small loans. Maintain a detailed ledger to keep track of your payables and receivables in one place. With PCI-DSS compliant payment options, SSL certified websites, and other robust security protocols, your business is safeguarded at all times. This extensive array of features guarantees you have every necessary resource to succeed in the fast-paced online market environment, ensuring you stay ahead of the competition.

Experience seamless payment reception from the United States into a compliant US account, with the ability to withdraw your funds whenever you choose. For a nominal monthly fee of $4.99, you gain access to your receiving account and can enjoy unlimited transfers without facing any transaction fees while benefiting from a fixed exchange rate. One subscription allows for an infinite number of transfers, providing you with the best exchange rates available, all backed by a commitment to reliability. You can withdraw funds from your local bank as frequently as desired, with no minimum transaction amount imposed. As your transfer volume increases, so do your savings, making it an advantageous choice. By signing up for a Higlobe account, you will be provided with a US-receiving bank account that is specifically crafted for the global workforce. This user-friendly platform, developed by international workers, facilitates easy payment reception from US-based customers, employers, and business associates. Higlobe efficiently converts your payments into asset-backed stablecoins for secure storage in your account, allowing you to effortlessly share your account details with your US employer or customer for hassle-free payments. This innovative system not only streamlines the transaction process but also empowers you to manage your finances effectively within the global market, ensuring you can focus on what truly matters while enjoying the benefits of modern financial solutions.