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# SingleFax vs QuickFax: Online Pay-Per-Fax Services Compared

UpdatedOct 13, 2026 [![Mircea Rilă](https://singlefax.com/images/authors/mircea-rila.jpg)Mircea Rilă](https://singlefax.com/authors/mircea-rila)

Compare SingleFax and QuickFax for one-time online faxing. Explore transparent pricing models, pay-on-success holds, inbound options, and global coverage.

![SingleFax vs QuickFax: Online Pay-Per-Fax Services Compared](https://singlefax.com/images/versioned/48107396e398f9cd/singlefax-vs-quickfax.jpg)

When searching for a way to send an occasional document without being locked into a recurring monthly contract, pay-per-fax services represent the most practical solution. Both SingleFax and QuickFax address this search intent, offering web-based document transmission without heavy enterprise software onboarding.

If you are comparing single-transaction providers, here is a breakdown of how SingleFax compares to QuickFax in transparency, payment handling, inbound capabilities, and telecom reach.

*Note: SingleFax rates are detailed below. For QuickFax, verify current rates, page caps, and terms directly on the QuickFax website.*

## How we compared

- Sources: QuickFax's and SingleFax's public product and pricing pages.
- Last updated: 13 October 2026. Check QuickFax's live page before you buy.
- Not tested: we didn't run delivery or speed tests.
- We make SingleFax.

## Feature and Capability Overview

| Feature | SingleFax | QuickFax |
| --- | --- | --- |
| **Primary Model** | **Pay-Per-Fax (Zero Subscription)** | Pay-Per-Fax / One-Off Sending |
| **Domestic Send Pricing** | **$0.99 for ≤10 pages**, then \~$0.08/p (cap 100) | Pay-per-fax (verify on vendor site) |
| **Payment Protection** | **Pay-on-success authorization hold** | Standard checkout (check vendor terms) |
| **Account Required** | **No (Instant Guest Checkout)** | No / Optional |
| **Global Destination Reach** | **220+ countries** supported | Varies by route (check vendor site) |
| **Fax Numbers** | 30-day ($4.99) or [$97 Lifetime](https://singlefax.com/lifetime-fax-number) | Check vendor site for availability |
| **AI / Developer Access** | Native MCP server for AI agents + REST API | Web form focused |
| **Security Architecture** | TLS encryption, automated file purge | Standard web transmission |

---

## 1. Transparent Pricing and Page Inclusions

When sending multi-page packets, knowing your exact cost upfront prevents checkout surprises:

- **SingleFax:** SingleFax uses an open, published pricing structure. Domestic transmissions cost **$0.99 for up to 10 pages**. For longer documents (such as 15 to 100 pages), additional pages cost approximately **$0.08 each**, with a hard cap at 100 pages per transmission. International rates for over 220 countries are calculated and displayed before you enter your payment details.
- **QuickFax:** QuickFax operates on a per-fax basis where prices vary depending on document volume and destination. Because rates may adjust based on carrier routing, users should review the final quote displayed on their checkout screen.

---

## 2. Pay-on-Success Authorization vs Upfront Billing

One of the key technical challenges in faxing is recipient line reliability. Destination numbers can be busy, offline, or misconfigured as voice lines:

- **SingleFax Pay-on-Success:** SingleFax integrates with Stripe to place an authorization hold on your payment card. If our telecom carriers successfully deliver the document and receive an electronic handshake, the hold is captured and a detailed transmission receipt is emailed to you. If the transmission fails after retries, the authorization hold is automatically voided.
- **Standard One-Off Billing:** Traditional checkout flows capture funds immediately at the moment of file upload. When lines fail, users often have to contact customer support to request manual credits or refunds.

---

## 3. Fax numbers: Temporary vs Lifetime

Most one-time fax tools focus exclusively on outbound sending. However, many real-world transactions, such as mortgage pre-approvals, legal discovery, or insurance claims, require the receiving party to send back a signed copy.

SingleFax provides flexible inbound options that avoid monthly software fees. If the reply comes today, a [free fax number](https://singlefax.com/free-fax-number) receives faxes free for 24 hours with no card. For longer windows:

1. **30-Day Temporary Number ($4.99):** Rent a dedicated local fax number for one month. Incoming faxes are converted to PDFs and delivered straight to your email inbox. Once your paperwork is complete, the line expires with zero renewal fees.
2. **Lifetime Fax Number ($97):** Pay once and keep your dedicated fax number permanently. Ideal for freelancers, solo attorneys, and small business owners who need a permanent number on their business cards without paying $10 to $20 every month to a legacy telecom provider.

---

Have a fax number you want to keep? Read [how to port your fax number](https://singlefax.com/blog/port-your-fax-number). SingleFax accepts eligible US/Canada local port-ins on Standard or Business, rather than lifetime or 30-day plans. Confirm release details with your current provider and keep service active until completion.

## 4. Modern Workflows: AI Agents and Developer Tools

For power users, developers, and teams automating document workflows:

- **SingleFax:** Provides direct integrations for AI tools (such as Claude, ChatGPT, and custom LLM workflows) via an official Model Context Protocol (MCP) server. Users can instruct AI assistants to compile, format, and transmit faxes directly from their IDE or chat client.
- **QuickFax:** Focuses primarily on manual, browser-based web uploads for standard individual users.

---

## Summary: Which Should You Use?

Both platforms allow you to send documents without being trapped in expensive monthly subscriptions.

- **Check QuickFax** if you want to compare quotes on their website for your specific document length and destination.
- **Choose SingleFax** if you want guaranteed $0.99 base pricing (up to 10 pages), pay-on-success payment holds, global delivery to 220+ countries, or temporary and lifetime inbound phone numbers.

Ready to send your document? [Send a fax online with SingleFax](https://singlefax.com/send-or-receive-fax) for $0.99.

---

## Related Comparisons and Guides

- [Online fax services for one-time use, compared](https://singlefax.com/blog/best-one-time-pay-per-fax-services-2026)
- [How to Choose an Online Fax Service in 2026](https://singlefax.com/blog/how-to-choose-the-best-online-fax-service)
- [Top Online Fax Services Compared (2026)](https://singlefax.com/blog/top-10-online-faxing-services-compared)
- [Pay-Per-Fax vs Subscription: When $0.99 Beats a Monthly Plan](https://singlefax.com/blog/pay-per-fax-vs-subscription)
- [SingleFax vs FaxZero](https://singlefax.com/blog/singlefax-vs-faxzero)
- [SingleFax vs eFax](https://singlefax.com/blog/singlefax-vs-efax)
- [SingleFax vs Dropbox Fax](https://singlefax.com/blog/singlefax-vs-dropbox-fax)
- [UPS Store & Staples Faxing vs Online Fax](https://singlefax.com/blog/ups-staples-fax-vs-online)

## Frequently asked questions

What do SingleFax and QuickFax have in common?

Both SingleFax and QuickFax target users who want to send faxes online on a pay-per-use basis without committing to recurring monthly SaaS subscriptions.

How does SingleFax pricing work?

SingleFax charges a domestic base rate of $0.99 for up to 10 pages, then approximately $0.08 per page up to a 100-page cap, using a pre-authorization hold captured only after telecom delivery is confirmed.

What does QuickFax charge?

QuickFax operates on a pay-per-fax model with variable rates depending on document length and destination. Check their official website directly to confirm their current pricing schedule.

Can I receive incoming faxes with these services?

SingleFax provides standalone inbound options, including a 30-day temporary number ($4.99) and a permanent Lifetime Fax Number ($97) with no ongoing subscriptions. Check QuickFax directly for their current inbound availability.

## Send a fax

[Send a fax](https://singlefax.com/send-or-receive-fax?type=send) [Get a US or Canadian number](https://singlefax.com/send-or-receive-fax?type=receive)

## Related guides

[<h2>How to Fill Out Form SS-4 and Apply for an EIN by Fax (2026 Walkthrough)</h2>Line-by-line Form SS-4 walkthrough for an EIN by fax: what to write for foreign owners, common mistakes, the return fax and what happens after you send.UpdatedOct 14, 2026](https://singlefax.com/blog/apply-for-ein-by-fax-ss4) [<h2>Best Free Fax Numbers Online (2026): Receive Faxes Free</h2>Free fax numbers for receiving in 2026: 24-hour numbers, toll-free options, trials and public queues. How long each lasts, page limits and the catch.UpdatedOct 15, 2026](https://singlefax.com/blog/best-free-fax-numbers-online-2026) [<h2>Best Free Online Fax Services (2026): 7 Options Compared</h2>The best free online fax services in 2026 compared: free sending quotas, free receiving numbers, page caps, expiry and catches, in one table.Oct 15, 2026](https://singlefax.com/blog/best-free-online-fax-services)

[singlefax](https://singlefax.com/)

Send once. Receive when you need to.

[![Get it on Google Play](https://singlefax.com/images/google-play-badge.png)](https://play.google.com/store/apps/details?id=com.monocube.singlefax) [Add to Chrome](https://chromewebstore.google.com/detail/singlefax-fax-a-document/ojpmpilgkmjcfebhpkdmmjlkbcifkkej) [SingleFax on LinkedIn](https://www.linkedin.com/company/singlefax/) [SingleFax on Facebook](https://www.facebook.com/singlefax) [SingleFax on Instagram](https://www.instagram.com/singlefax.app) [SingleFax on Threads](https://www.threads.com/@singlefax.app) [SingleFax on YouTube](https://www.youtube.com/@singlefax) [SingleFax on GitHub](https://github.com/SingleFax)

## Fax services

- [Send a fax](https://singlefax.com/send-or-receive-fax?type=send)
- [Receive faxes](https://singlefax.com/send-or-receive-fax?type=receive)
- [Free 24-hour number](https://singlefax.com/free-fax-number)
- [Lifetime number](https://singlefax.com/lifetime-fax-number)
- [Number porting](https://singlefax.com/number-porting)
- [Test fax](https://singlefax.com/test-fax-number)
- [Company plans](https://singlefax.com/for-companies)
- [HIPAA Secure](https://singlefax.com/hipaa-fax)
- [Online fax](https://singlefax.com/online-fax)
- [Email to fax](https://singlefax.com/email-to-fax)
- [WhatsApp to fax](https://singlefax.com/whatsapp-to-fax)

## IRS filings

- [All IRS filings](https://singlefax.com/irs-filings)
- [EIN · Form SS-4](https://singlefax.com/get-ein)
- [Form 5472](https://singlefax.com/file-5472)
- [Form 7004](https://singlefax.com/file-7004)
- [Form 2553](https://singlefax.com/file-2553)
- [Form 2848](https://singlefax.com/file-2848)
- [Form 4506-T](https://singlefax.com/file-4506-t)
- [Form 8821](https://singlefax.com/file-8821)
- [Form 8802](https://singlefax.com/file-8802)
- [Form 8655](https://singlefax.com/file-8655)
- [Form 3911](https://singlefax.com/file-3911)
- [Form 8233](https://singlefax.com/file-8233)
- [NY POA-1](https://singlefax.com/file-ny-poa-1)

## Tools & resources

- [Free fax tools](https://singlefax.com/free-fax-tools)
- [Prepare a fax PDF](https://singlefax.com/prepare-fax)
- [Printable test page](https://singlefax.com/fax-test-page)
- [Cover sheets](https://singlefax.com/fax-cover-sheet)
- [Mobile app](https://singlefax.com/mobile-app)
- [Chrome extension](https://singlefax.com/chrome-extension)
- [Developers](https://singlefax.com/developers)
- [AI fax agents](https://singlefax.com/agents)
- [Versioning](https://singlefax.com/versioning)
- [Congress fax directory](https://singlefax.com/fax/congress)
- [Senate fax directory](https://singlefax.com/fax/senate)
- [Governor fax directory](https://singlefax.com/fax/governors)

## SingleFax

- [Pricing](https://singlefax.com/pricing)
- [Blog](https://singlefax.com/blog)
- [About](https://singlefax.com/about)
- [Contact](https://singlefax.com/contact)
- [Support](https://singlefax.com/support)

© 2026 SingleFax

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