# Best Online Fax Software with Pay-As-You-Go Capabilities ## How Many Online Fax Software Products Does G2 Track? **Total Products under this Category:** 74 ### Category Stats (Jul 2026) - **Average Rating:** 4.31/5 The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** Upland InterFAX (+0.44%) - Among all products in this category, Upland InterFAX recorded the largest rating increase compared to last month _Last updated: July 31, 2026_ ## How Does G2 Rank Online Fax Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 4,300+ Authentic Reviews - 74+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## G2 Grid® for Online Fax Software ![G2 Grid® for Online Fax Software plotting products by satisfaction and market presence](https://www.g2.com/categories/online-fax/grids.png?focus%5B%5D=1173&focus%5B%5D=81124&focus%5B%5D=133160&focus%5B%5D=1259222&focus%5B%5D=3695&focus%5B%5D=14857&focus%5B%5D=43109&focus%5B%5D=15611) Highlighted products: RingEX, iFax, Upland InterFAX, eFax Online Fax Service, GoTo Connect, HelloFax, Documo, and OpenText Core Fax. Underlying data: [Grid® JSON](https://www.g2.com/categories/online-fax/grids.json?focus%5B%5D=ringex&focus%5B%5D=ifax&focus%5B%5D=upland-interfax&focus%5B%5D=efax-online-fax-service&focus%5B%5D=goto-connect&focus%5B%5D=hellofax&focus%5B%5D=documo&focus%5B%5D=opentext-core-fax) **Sponsored** ### SAP Fieldglass Drive better business outcomes with a robust Vendor Management System (VMS) to find, engage, and manage your global external workforce – including temporary workers, freelancers, contractors, consultants, and service workers. Since 1999, organizations have been using innovative digital SAP Fieldglass solutions to transform how they get work done. Offered in 190 countries and 21 languages, our open cloud-based applications let you simplify and streamline the procurement and management of your external workforce. You can: • Connect in real time to a global network of qualified service providers and contingent workers so you can find the right talent more quickly. • Track and manage key metrics to accurately manage performance and enhance outcomes and productivity over time. • Improve process efficiency, total workforce results, and spend management savings through integration with ERP, HR, and procurement solutions. • Reduce risk through security features that support global-regulations compliance, permissions and access tracking, and asset protection through proper on- and offboarding. • Increase productivity and strengthen competitive advantage by creating and maintaining a dynamic, responsive workforce. [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list_llm&secure%5Bcategory_id%5D=1466&secure%5Bchosen_at%5D=2026-07-31T15%3A47%3A42Z&secure%5Bdisplayable_resource_id%5D=133&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=retargeted_product&secure%5Bplacement_resource_ids%5D%5B%5D=38217&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=38217&secure%5Bresource_id%5D=1466&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Fonline-fax%2Ff%2Fpay-as-you-go&secure%5Btoken%5D=785a6174fa2ed96933697e7a6a8e8a78a08b68d022a5eb9b75a8956b88949fc9&secure%5Burl%5D=https%3A%2F%2Fwww.sap.com%2Fdocuments%2F2025%2F03%2Fc4519407-fc7e-0010-bca6-c68f7e60039b.html%3Fcampaigncode%3DCRM-YD25-ISM-408601%26source%3DFG-click-campaign-G2&secure%5Burl_type%5D=custom_url) ### [FaxZero](https://www.g2.com/products/faxzero/reviews) Send faxes for free to anywhere in the U.S. and Canada **Average Rating:** 4.6/5.0 **Total Reviews:** 15 #### How Do G2 Users Rate FaxZero? - **Ease of Use:** 10.0/10 (Category avg: 8.7/10) - **Storage:** 10.0/10 (Category avg: 8.5/10) - **Contact Management:** 10.0/10 (Category avg: 8.5/10) #### Who Is the Company Behind FaxZero? - **Seller:** [Faxzero](https://www.g2.com/sellers/faxzero) - **HQ Location:** N/A - **Twitter:** @faxzero 494 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 63% Small, 31% Medium #### What Are Recent G2 Reviews of FaxZero? **["I use it every time I need to fax something because it's so simple and affordable."](https://www.g2.com/survey_responses/faxzero-review-7621836)** **Rating:** 5.0/5.0 stars _— Stephanie P._ [Read full review](https://www.g2.com/survey_responses/faxzero-review-7621836) **["Good Option For The Occassional Fax"](https://www.g2.com/survey_responses/faxzero-review-7617707)** **Rating:** 4.5/5.0 stars _— Joseph J. L. M._ [Read full review](https://www.g2.com/survey_responses/faxzero-review-7617707) #### What Are G2 Users Discussing About FaxZero? - [Does FaxZero have an app?](https://www.g2.com/discussions/does-faxzero-have-an-app) - [Can you receive faxes on FaxZero?](https://www.g2.com/discussions/faxzero-can-you-receive-faxes-on-faxzero) - [Can you receive faxes on FaxZero?](https://www.g2.com/discussions/can-you-receive-faxes-on-faxzero) - [How good is FaxZero com?](https://www.g2.com/discussions/faxzero-how-good-is-faxzero-com) - [How good is FaxZero com?](https://www.g2.com/discussions/how-good-is-faxzero-com) ### [Fax.to](https://www.g2.com/products/fax-to/reviews) Easy, affordable online fax service. **Average Rating:** 4.8/5.0 **Total Reviews:** 6 #### How Do G2 Users Rate Fax.to? - **Has the product been a good partner in doing business?:** 9.2/10 (Category avg: 8.8/10) - **Ease of Use:** 10.0/10 (Category avg: 8.7/10) - **Storage:** 9.2/10 (Category avg: 8.5/10) - **Contact Management:** 10.0/10 (Category avg: 8.5/10) #### Who Is the Company Behind Fax.to? - **Seller:** [Fax.to](https://www.g2.com/sellers/fax-to) - **Year Founded:** 2018 - **HQ Location:** Paphos, CY - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=6d2f953602adfad64a5ef4f05c2bf1199edcd5aaa8adebe97c57933488df3ea5&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fsms-to&secure%5Burl_type%5D=linkedin_company_website) 2 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 67% Small, 33% Medium #### What Are Recent G2 Reviews of Fax.to? **["Great way to send fax when you don't have other options"](https://www.g2.com/survey_responses/fax-to-review-7554798)** **Rating:** 5.0/5.0 stars _— Maria P._ [Read full review](https://www.g2.com/survey_responses/fax-to-review-7554798) **["it was easy to use and was a cheap way to send fax."](https://www.g2.com/survey_responses/fax-to-review-7540823)** **Rating:** 4.5/5.0 stars _— Ömer K._ [Read full review](https://www.g2.com/survey_responses/fax-to-review-7540823) ### [Genius Fax](https://www.g2.com/products/genius-fax/reviews) Genius Fax offers the ability to both send and receives the fax. **Average Rating:** 4.5/5.0 **Total Reviews:** 1 #### How Do G2 Users Rate Genius Fax? - **Ease of Use:** 10.0/10 (Category avg: 8.7/10) - **Storage:** 8.3/10 (Category avg: 8.5/10) #### Who Is the Company Behind Genius Fax? - **Seller:** [Grizzly Labs](https://www.g2.com/sellers/grizzly-labs) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Medium #### What Are Recent G2 Reviews of Genius Fax? **["Works great!"](https://www.g2.com/survey_responses/genius-fax-review-3726535)** **Rating:** 4.5/5.0 stars _— Weston A._ [Read full review](https://www.g2.com/survey_responses/genius-fax-review-3726535) #### What Are G2 Users Discussing About Genius Fax? - [What is Genius Fax used for?](https://www.g2.com/discussions/what-is-genius-fax-used-for) ### [PamFax](https://www.g2.com/products/pamfax/reviews) PamFax is an internet fax software solution. **Average Rating:** 2.5/5.0 **Total Reviews:** 1 #### How Do G2 Users Rate PamFax? - **Ease of Use:** 6.7/10 (Category avg: 8.7/10) #### Who Is the Company Behind PamFax? - **Seller:** [PamFax](https://www.g2.com/sellers/pamfax) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Small #### What Are G2 Users Discussing About PamFax? - [What is PamFax used for?](https://www.g2.com/discussions/what-is-pamfax-used-for) ### [FaxFresh](https://www.g2.com/products/faxfresh/reviews) FaxFresh is an online faxing solution. #### Who Is the Company Behind FaxFresh? - **Seller:** [FaxFresh](https://www.g2.com/sellers/faxfresh) - **HQ Location:** N/A - **Twitter:** @faxfresh 9 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [FaxSalad](https://www.g2.com/products/faxsalad/reviews) FaxSalad is a modern, secure, and user-friendly online faxing service that enables individuals and businesses to send and receive faxes directly from their email, smartphone, or web browser. With a straightforward pay-as-you-go pricing model, FaxSalad eliminates the need for traditional fax machines, offering a flexible and cost-effective solution for managing fax communications. The platform supports international faxing across over 40 countries, ensuring reliable and efficient document transmission for users worldwide. Key Features and Functionality: - Email and Web-Based Faxing: Send and receive faxes directly through your email account or via the FaxSalad web portal, providing convenience and accessibility from any device. - Global Coverage: FaxSalad offers international faxing capabilities, allowing users to send and receive faxes in over 40 countries with competitive, flat-rate pricing. - Flexible Payment Options: Choose between pay-as-you-go and monthly plans tailored to your needs, with no lock-in contracts, enabling you to cancel at any time. - Number Porting: Easily transfer your existing fax number to FaxSalad without any setup fees, ensuring continuity and convenience. - Secure Cloud Storage: All inbound and outbound documents are securely stored in the cloud, providing easy access and ensuring that you never lose a fax again. - HIPAA Compliance: FaxSalad adheres to stringent security standards, including HIPAA compliance, to ensure the highest levels of privacy and data protection. Primary Value and User Solutions: FaxSalad addresses the challenges associated with traditional faxing by offering a digital solution that is both cost-effective and easy to use. By eliminating the need for physical fax machines, line rentals, and hidden fees, users can significantly reduce operational costs. The platform's global reach and secure transmission capabilities make it ideal for industries such as healthcare, legal, financial, retail, and government, where reliable and confidential document exchange is crucial. With FaxSalad, users gain control over their fax communications, enjoying the flexibility to send and receive faxes anytime, anywhere, without compromising on security or compliance. #### Who Is the Company Behind FaxSalad? - **Seller:** [FaxSalad](https://www.g2.com/sellers/faxsalad) - **Year Founded:** 2017 - **HQ Location:** Melbourne, AU - **Twitter:** @FaxSalad 17 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=9df12959c890891f2311aa1b35f966fe7eff45a944f0781e4001ceba1c287aa9&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Ffaxsalad&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [UTBox](https://www.g2.com/products/utbox/reviews) UTBox is a leading provider of Internet fax and SMS services to both business and individuals. #### Who Is the Company Behind UTBox? - **Seller:** [UTBox](https://www.g2.com/sellers/utbox) - **Year Founded:** 1995 - **HQ Location:** Woolloomooloo, AU - **Twitter:** @utboxsupport 45 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=9fa2fe9e079e6a3ffb060b9f1cb60147aede44e85ac7ac94b386215517f9e428&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Futbox%2F&secure%5Burl_type%5D=linkedin_company_website) 9 employees on LinkedIn® Spotlight Categories [Sales Performance Management Software](https://www.g2.com/categories/sales-performance-management) [CRM Software](https://www.g2.com/categories/crm) [Lead Intelligence Software](https://www.g2.com/categories/lead-intelligence) [Customer Service Automation Software](https://www.g2.com/categories/customer-service-automation) [CMMS Software](https://www.g2.com/categories/cmms) Similar Categories - [Team Collaboration](/categories/team-collaboration) - [Other Collaboration](/categories/other-collaboration) - [Agentic AI Browser](/categories/agentic-ai-browser) - [AI Meeting Assistants](/categories/ai-meeting-assistants) - [AI Presentation Tools](/categories/ai-presentation-tools) - [Audio Conferencing](/categories/audio-conferencing) - [Board Management](/categories/board-management) - [Bookmark Manager](/categories/bookmark-manager) - [Browser](/categories/browsers) - [Business Scheduling](/categories/business-scheduling) - [Calendar](/categories/calendar-software) - [Cloud PBX Platforms](/categories/cloud-pbx-platforms) - [Collaborative Research Writing Tools](/categories/collaborative-research-writing-tools) - [Decision-Making](/categories/decision-making) - [Digital Adoption Platform](/categories/digital-adoption-platform) [Browse Online Fax Themes](/categories/online-fax/themes) Below are the top-rated Online Fax Software with Pay-As-You-Go capabilities, as verified by G2’s Research team. Real users have identified Pay-As-You-Go as an important function of Online Fax Software. Compare different products that offer this feature so you can decide which is best for your business needs. Top Tools at a Glance | | CRM-integrated fax on unified business number | User Review "Stable calls, solid messaging, and AI that actually helps after meetings" | | | HIPAA-compliant faxing without physical machines | User Review "Worked fast" | | | Email-integrated faxing without physical machines | User Review "eFax simplifies secure, professional, remote-friendly faxing with AI-powered efficient" | | | API-driven faxing for healthcare integrations | User Review "Sending Faxes Has Never Been Easier User" | | | Unified phone and fax with VoIP | User Review "Easy Setup, Empowers Call Center Efficiency" | | | HIPAA-compliant faxing with EMR integration | User Review "Easy to Install, Insightful Reports, and Top-Notch Support" | | | Paperless faxing without physical machines | User Review "Ease of use and quality are hreat" | | | Enterprise HIPAA-compliant fax server consolidation | User Review "Moving to Next Generation Faxing" | | | API-driven fax integration with developer support | User Review "Effortless Faxing with Zero Issues" | * * * Show More