SingleFax vs eFax: Monthly Subscription vs Pay-Per-Fax Compared

When individuals and businesses look for ways to send faxes online, eFax is often one of the first brand names they encounter. Having launched in the late 1990s, eFax helped pioneer email-to-fax technology and built a widespread corporate presence.

However, the internet fax landscape in 2026 is vastly different. Modern users frequently ask whether paying a recurring monthly subscription of ~$18.99 per month makes sense when they only need to send documents a few times each year.

This guide provides a detailed, objective comparison between eFax and SingleFax across pricing, usability, commitment, and compliance.

Note: Pricing figures below reflect research snapshots from mid-2026. Because SaaS tiers and carrier fees fluctuate, verify current pricing directly on provider websites.

Side-by-Side Comparison: SingleFax vs eFax

1. Annual Cost Breakdown: Occasional vs High-Volume

The biggest difference between SingleFax and eFax is how recurring costs compound over time.

Scenario A: The Occasional User (1 to 5 Faxes per Year)

If you only need to submit an IRS tax form, send closing papers for a mortgage, or transmit a medical records release:

• eFax Personal: ~$18.99/month × 12 months = ~$227.88 per year
• SingleFax: 5 transmissions × $0.99 = $4.95 total
• Annual Savings with SingleFax: ~$222.93

For occasional senders, maintaining an active eFax subscription results in paying for 10 or 11 months of completely idle software access.

Scenario B: Steady Daily Office Usage (200+ Pages per Month)

If your law firm, real estate agency, or medical billing office transmits dozens of multi-page packets every week:

• An eFax subscription includes pooled quotas (150 in / 150 out) that help standardize monthly billing.
• For business teams wanting multi-user management without high enterprise markups, SingleFax for Companies provides flexible shared plans starting at $9.99/month or $99/year.

2. Account Friction and Guest Checkout

• eFax: Requires creating a full account, selecting a local or toll-free number, and entering credit card details for recurring auto-billing. If you only have one document to send under a deadline, onboarding requires multiple registration steps.
• SingleFax: Offers instant guest checkout. You simply upload your PDF or image file, type the destination number, and authorize payment via Stripe, Apple Pay, or Google Pay. There is no password to remember and no active subscription to manage later.

3. Inbound Number Strategies

Receiving faxes requires a dedicated telephone line routed through telecom carriers:

• eFax: Bundles a permanent local or toll-free number into your $18.99/month subscription. As long as you maintain the paid subscription, you retain the number. If you cancel your subscription, the number is deactivated.
• SingleFax: Unbundles sending from receiving so you never pay for features you do not need:
  • Temporary Inbound: Rent a 30-day inbound number for $4.99 when you expect a one-time response. Incoming faxes arrive as PDF attachments in your email.
  • Permanent Inbound: Purchase a Lifetime Fax Number for a flat $97 one-time fee. You keep the dedicated number permanently without paying monthly software subscription charges.

4. Healthcare and Regulatory Compliance

Both platforms support healthcare and legal compliance requirements:

• eFax: Serves enterprise healthcare networks through eFax Corporate and eFax Protect, offering signed Business Associate Agreements (BAAs) and centralized enterprise audit controls.
• SingleFax: Offers a dedicated HIPAA Fax product tailored for clinics and covered entities requiring signed BAAs. For standard consumer users sending personal records, SingleFax uses TLS encryption and automatically purges documents from active servers post-transmission.

Summary: Which Should You Choose?

Choose SingleFax If:

• You fax occasionally (1 to 20 times per year) and want to avoid paying $220+ in annual subscription fees.
• You want to send a document right now without creating an account or navigating cancellation workflows.
• You prefer pay-on-success authorization holds over upfront billing.
• You want a permanent lifetime fax number without recurring monthly bills.

Choose eFax If:

• You are a large corporate enterprise that prefers established legacy vendors with dedicated account managers.
• You transmit high volumes of inbound and outbound faxes every month that match their bundled quotas.
• Your organization relies on eFax's proprietary desktop utilities.

Ready to transmit your document? Send a fax online with SingleFax for $0.99.

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