Fax.Plus

Fax.Plus is the online fax service I point people to when they have no idea where to start. It does the boring parts well — the apps are clean, the numbers reach almost anywhere, and there’s a permanent free tier so you can kick the tires before handing over a card. If cloud faxing has an obvious default in 2026, this is it.

That said, “best overall” is not the same as “best for you,” and Fax.Plus has one decision baked into its pricing that quietly disqualifies it for two important audiences: small medical practices and developers. Both the HIPAA business associate agreement and the API now live exclusively on the $79.99 Enterprise tier. If you need either of those things, keep reading — but keep a couple of alternatives in your back pocket too.

This review walks through every plan, the real cost once overages and add-ons enter the picture, the app lineup, the security posture, and where the product genuinely shines versus where the marketing gets ahead of the reality.

Who Fax.Plus is for (and who should skip it)

Fax.Plus is a strong pick if you want a modern, low-friction way to send and receive faxes from a phone, a laptop, or your email inbox, and you value polish and international reach over rock-bottom per-page pricing. Home offices, freelancers, and small teams that fax across borders are the sweet spot. It’s also a reasonable fit for larger organizations that specifically need the Enterprise feature set — API access, single sign-on, and a signed BAA under one roof.

You should probably look elsewhere in three cases. If you’re a solo clinic that needs HIPAA compliance on a budget, paying $79.99 a month for a BAA is hard to justify when SRFax and Documo include one on far cheaper plans. If you’re a developer who just wants a fax API without enterprise overhead, the Enterprise-only gate will sting. And if all you care about is the lowest possible cost per page for domestic faxing, budget-focused rivals will beat Fax.Plus on the spreadsheet. Our fax price calculator is the fastest way to see how the math lands for your volume.

Who makes Fax.Plus

Fax.Plus is built by Alohi, a Swiss company headquartered in Geneva that leans hard on its “Swiss Made” positioning and the privacy reputation that comes with it. Alohi isn’t a one-product shop — it also makes Sign.Plus (electronic signatures), Scan.Plus (mobile scanning), and Dial.Plus (a phone product). That matters more than it sounds, because the eSignature workflow inside Fax.Plus is really Sign.Plus wearing a fax hat, and the shared engineering shows in how consistent the apps feel.

The company says its products are used by more than five million companies and teams across 190-plus countries, and it name-checks customers like PwC and Cloudflare. Take vendor logos with the usual grain of salt, but the scale is real and the certification list backs it up. In a category full of thinly staffed white-label operators, having an established company with a genuine security program behind the product counts for something.

Pricing, plan by plan

Fax.Plus runs five tiers: a free plan plus four paid ones. Every paid plan is cheaper on annual billing — Alohi advertises up to three months free for paying yearly, which works out to roughly a third off the month-to-month rate. All the paid numbers below assume that annual commitment; pay monthly and you’ll spend about 33% more.

The Free plan gives you 10 pages, total, with no credit card. It’s send-only and there’s no dedicated number, so treat it as a trial rather than a real plan. It’s still one of the better ways in the market to confirm the apps work for you before spending anything.

Basic is the entry point at $6.99/month annually ($9.33 billed monthly). You get a dedicated fax number and 200 pages a month, with extra pages at 10 cents each. This is the plan for a household or a sole proprietor who faxes occasionally and wants a permanent number for both directions.

Premium at $13.99/month annually ($18.66 monthly) raises the allowance to 500 pages and drops overages to 7 cents. More importantly, this is the first tier that unlocks toll-free numbers and number porting, so if you’re bringing an existing fax number over from a legacy line, Premium is your floor.

Business at $27.99/month annually ($37.32 monthly) bumps you to 1,000 pages, 5 cents per overage page, and up to five team members with an admin console. It also adds the Slack and Microsoft Teams integrations. For a small office where a few people share fax duties, this is the natural home.

Enterprise starts at $79.99/month — and unusually, that rate is the same whether you pay monthly or annually. It includes 1,000 pages (negotiable upward), the lowest 3-cent overage, and unlimited team members. Crucially, it’s the only tier that includes a signed HIPAA BAA, API access, single sign-on, and data-residency options. That bundling is the single most consequential thing about Fax.Plus’s pricing, and I’ll come back to it.

What it really costs

The sticker price and the bill are not always the same number. A few things to budget for. Overages compound quietly — if you’re on Basic and regularly push past 200 pages, those 10-cent pages add up faster than you’d guess, and it’s usually cheaper to move up a tier than to keep paying the penalty. Additional fax numbers cost $4.99 a month each on Business and Enterprise, easy to forget when you’re spinning up numbers for different departments. And the Enterprise jump is steep: there’s nothing between Business at $27.99 and Enterprise at $79.99, so the moment you need a BAA or API access, your bill nearly triples with no middle option.

For a realistic home-office user sending 100–150 pages a month, Basic at $6.99 annually is genuinely inexpensive and you’ll rarely see an overage. For a five-person office at Business, $27.99 for 1,000 pooled pages is competitive, though not the cheapest per page — that title belongs to Nextiva vFax and MetroFax. If you’re weighing those trade-offs, the hidden-fees breakdown on our blog is worth a read before you commit.

Features that actually matter

Strip away the feature-list padding and Fax.Plus does the core job thoroughly. You can send from the web app, the mobile and desktop apps, or straight from email — email-to-fax is supported in both directions, which is still the workflow a lot of people quietly rely on. Cover pages are customizable with sender and recipient details, and you can edit the fax header (date, time, page count, custom text) rather than being stuck with a default.

A handful of touches go beyond the basics. Scheduled faxing lets you queue a transmission for later, handy across time zones. Extension dialing reaches machines that sit behind a phone menu. There’s a blacklist for shutting down spam and anonymous senders — a real problem on inbound numbers that many services ignore. Received documents land in encrypted storage, every transmission generates a confirmation report you can keep as proof of delivery, and a phonebook with grouping keeps frequent recipients tidy. Alohi has also added AI-assisted text and data extraction from received faxes, which is more useful than it sounds if you’re pulling numbers off inbound forms.

The eSignature capability deserves a specific note: it’s Sign.Plus integrated into the fax flow, so signing a document and faxing it is one continuous task rather than a hand-off between two tools. If your paperwork routinely needs a signature before it goes out, that integration is a quiet time-saver.

Sending and receiving, in practice

The workflow is about as friendly as faxing gets. On the web or in an app, you attach a file, pick a recipient from the phonebook or type a number, optionally add a cover sheet, and send; you get a confirmation report when it lands. Inbound faxes arrive at your dedicated number and show up in the app and, if you want, your email, stored encrypted for later retrieval. You can temporarily disable reception if you need to, and route or assign numbers to specific team members on the multi-user plans.

Based on the documented workflow, the experience should feel closer to sending an email attachment than operating a fax machine, which is the whole point. One structural limitation to remember: the free tier can’t receive at all, and a real inbound number only starts at Basic — so if two-way faxing is the requirement, Basic is your true entry price, not free.

Apps on every platform

This is where Fax.Plus separates itself from most of the field. There are native apps for iOS and Android, desktop apps for both Windows and macOS, and the web app on top of that. Very few competitors offer a genuine desktop client — SRFax and Documo are web-only, for instance — so if you like a dedicated app in your dock rather than a browser tab, Fax.Plus is one of the few that obliges. The apps share a consistent design language across platforms, so moving from phone to laptop doesn’t mean relearning anything. For mobile-first users, iFax is the one rival that arguably matches the app experience, but Fax.Plus’s cross-platform completeness is hard to beat.

API and integrations

Fax.Plus has a proper REST API, and it’s a capable one. The endpoints (based at restapi.fax.plus/v3) cover sending and receiving, real-time status tracking with delivery and error codes, and programmatic management of fax numbers. Authentication uses OAuth 2.0 or personal access tokens, webhooks fire on send and receive events, and Alohi publishes official SDKs for Node.js, Python, PHP, and Go. For teams routing faxes into an EHR, a CRM, or a back-office system, that’s a solid foundation, and direct S3-compatible storage delivery is available for high-volume pipelines.

The catch is the gate: the API is Enterprise-only, at $79.99/month. There’s no developer or startup tier, so a small team that just wants to script a few faxes is paying enterprise money for the privilege. If programmatic faxing is your main use case and you don’t need the rest of the Enterprise bundle, compare against Documo, which opens its API on a lower tier, and read our fax API pricing guide before you settle. On the app-integration side, the picture is friendlier: Google Workspace, Slack, Microsoft Teams, and Zapier connections are available (Zapier and the deeper integrations skew toward the higher plans), so no-code automation is within reach without touching the API.

Security, encryption, and HIPAA

Fax.Plus has one of the more credible security stories in the category, helped by Alohi’s Swiss base and privacy positioning. The certification list is real and independently meaningful: ISO 27001, SOC 2 Type II, GDPR alignment, and PCI DSS, with data encrypted in transit and at rest and annual penetration testing. For general business confidentiality — contracts, HR paperwork, financial documents — that’s a strong baseline, stronger than most rivals bother to document.

HIPAA is where you have to read carefully, because this is exactly where other review sites mislead people. Fax.Plus can be HIPAA-compliant, but only on the Enterprise plan, and only when the advanced security controls are enabled with a signed business associate agreement. The lower tiers carry all that general security — ISO 27001, SOC 2, encryption — but no BAA, and without a BAA you cannot legally use the service for protected health information, full stop. So the honest read is this: Fax.Plus is HIPAA-capable at $79.99/month and not HIPAA-usable below that. A solo practitioner who needs a BAA and faxes a few hundred pages a month is dramatically overpaying here versus purpose-built options. Our HIPAA fax pricing guide lays out the cheaper compliant paths, and the HIPAA-compliant fax guide explains why the BAA — not the encryption — is the piece that actually matters.

File formats, interface, and ease of use

Fax.Plus handles the document types you’d expect a fax service to accept — PDFs and common image and office formats — and applies image processing to optimize documents for the fax pipeline, which helps legibility on the receiving end. The company doesn’t publish an exhaustive format table, so if you have an unusual file type, test it on the free tier first.

On usability, this is one of the more approachable products in the space. The interface is clean, the terminology is plain, and someone who has never sent an online fax can generally figure it out without a manual. That approachability is a big part of why it earns a “best overall” reputation — it doesn’t assume you know or care how faxing works under the hood.

Support

Support runs through email, live chat, and a help center. That’s a decent spread for self-serve users, and live chat in particular is more responsive than the email-only ticket queues some budget providers run. What you won’t find is phone support, which a few rivals — Documo with US-based phone lines, for example — do offer. For most users the chat-and-email combination is fine; for organizations that expect to pick up a phone when a fax fails at a critical moment, it’s a gap worth weighing.

Performance and reliability

I won’t invent delivery-success numbers I didn’t measure, but the documented infrastructure inspires reasonable confidence. Alohi advertises 99.99% uptime and runs annual penetration testing, and the company’s scale — millions of accounts across 190-plus countries — implies the carrier relationships and redundancy that keep faxes flowing. As always with faxing, the weak link is usually the ancient machine on the other end, not the cloud service, and Fax.Plus’s confirmation reports at least tell you clearly when a transmission didn’t go through.

Is it right for your situation?

Small business: Yes, comfortably. Business at $27.99 for 1,000 pooled pages and five users, plus the admin console and Slack/Teams integrations, is a sensible package for a small team. You’ll pay a little more per page than the budget leaders, but you get better apps and broader reach in exchange.

Healthcare: Only at Enterprise, and only if you also want the other Enterprise features. A solo or small practice that just needs a BAA should start with SRFax or Documo, both of which include compliance on much cheaper plans. Fax.Plus makes sense for a healthcare organization big enough to want API access and SSO alongside the BAA.

Legal and professional services: A good fit. Law firms and accountants value the strong general security (ISO 27001, SOC 2), the international coverage for cross-border work, the audit-friendly confirmation reports, and the built-in eSignature flow. Business is usually the right tier.

Enterprise: This is what the top plan is designed for. Unlimited users, API, SSO, data residency, and a BAA under one roof is a coherent package, though large buyers should still get a custom quote and compare against dedicated enterprise fax vendors.

How it compares

A few head-to-heads worth making. Against Documo, Fax.Plus wins on international reach, app polish, and price at the low end, but loses badly on HIPAA value — Documo bundles a BAA from its entry plan, where Fax.Plus makes you climb to $79.99. SRFax tells a similar story: it’s the budget-compliance champion with a no-frills interface, while Fax.Plus is the better-looking, more international, pricier-for-PHI option. Against iFax it’s close — both have excellent apps — with Fax.Plus edging ahead on country coverage and desktop clients. And if your only goal is the cheapest international number, CocoFax undercuts everyone, at the cost of self-attested (not BAA-backed) compliance. You can line all of these up on our comparison page.

The verdict

Fax.Plus earns its reputation as the default recommendation. It’s the most complete package in online faxing: clean, consistent apps on every platform including desktop, dedicated numbers in more countries than almost anyone at this price, a permanent free tier for risk-free testing, and a security program with the certifications to back the claims. For home offices, international teams, and small-to-midsize businesses that want faxing to feel modern, it’s an easy, confident pick — and cheap to start, at $6.99 a month on Basic.

The reservation is specific and important: Alohi has walled off HIPAA and the API behind the $79.99 Enterprise tier, with nothing in between it and the $27.99 Business plan. That single pricing choice turns Fax.Plus from the obvious answer into the wrong answer for the two audiences — small clinics needing a BAA and developers needing an API — who might otherwise have been its best customers. For everyone else, and for large organizations that actually want the whole Enterprise bundle, Fax.Plus is exactly as good as its reputation suggests. Run your real page volume through the calculator, decide whether you’ll ever need that Enterprise feature set, and buy accordingly.