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The most reliable cloud fax network on Earth.
The world's largest TDM fax network, intelligent SIP, and 26 years of routing data — engineered to send and receive the hardest, highest-volume fax traffic faster and more reliably than anyone else. In healthcare, faster patient data access allows you to provide better care.
TDM and SIP — and the intelligence to choose.
Most cloud fax vendors run a single transport and hope for the best. We run both, and pick the path most likely to succeed for each destination. Faster, more reliable fax delivery gives you the power to succeed.
Rock-solid by design.
We maintain the largest TDM fax network in the world — dedicated circuits with effectively unlimited bandwidth and none of the packet loss or timing disruptions that break fax over IP.
- Continuous, perfectly-timed circuits — no packets to drop, no timing gaps to corrupt a page
- Effectively unlimited bandwidth pushes faxes through faster and more reliably
- The faxes other networks abandon, ours completes
- Expensive legacy infrastructure we've invested in for decades — so you don't have to
Built to scale, tuned to win.
Our SIP network adds elastic capacity that scales instantly — and unlike the rest of the industry, we never throttle it.
- Scales up the moment your volume does — no provisioning lead time
- Fully digital routes that connect even faster when the receiving end supports them
- No baud-rate caps — full transmission speed, every time
- The reach and elasticity of IP, engineered to fax-grade reliability
We don't force every fax down one path. For each recipient, our routing engine selects TDM or SIP — and the specific carrier route — based on 26 years of historical success data. The fax takes the path most likely to land.
We own the entire network — so every fax is routed for your success, not our bottom line.
Completion rates don't vary by accident. Cheaper providers shove fax through least-cost-routing wholesale gateways that mangle transmissions to protect their own costs. We do the opposite.
One network, under our control
Because we own and operate the entire network, the moment something needs attention we handle it ourselves — instead of waiting in a wholesaler's ticket queue.
Connected as a carrier
Direct carrier interconnects mean fewer hops, cleaner signaling, and fax-grade quality on the path — not a chain of resold gateways between you and the recipient.
We never degrade your faxes to save money
We route every fax for the highest chance of completion — never down the cheapest path that quietly costs you a delivery. Your success is the routing objective, not our cost.
Send and receive faster than anyone in the business.
Speed isn't a vanity metric in fax — it decides whether a page lands at all, and in healthcare, faster patient data access allows you to provide better care. We move faxes faster in both directions: out the door and into your hands.
Faster transmissions complete more often.
Many cloud fax providers cap transmissions at 9,600 baud. We run all the way up to full Group 3 and V.34 super-G3 speeds of 33,600 baud.
The result compounds: faxes spend less time on the line, so more of them complete, and larger, more complex documents get through that would otherwise time out and fail.
It also protects your bill. Failure-prone, throttled transmission means more faxes that don't land cleanly — and across millions of pages, more failures means more wasted spend and more retries. By completing more faxes on the first attempt at full speed, we drive your real cost per delivered fax down.
When referrals, results, and records move faster, your clinicians have what they need sooner — and patients get care without waiting on paperwork. Because we pull inbound faxes in and push your responses out faster than slower networks, the right information reaches the right hands at the right moment.
26 years of telecom, engineered into every fax.
AI-optimized routing from real transmission history.
Retry logic you control.
Engineered for the hardest faxes.
Behind every fax is a patient who can't wait.
A delayed referral is a delayed diagnosis. A dropped result is a patient left waiting. Timely, completed faxes don't just move paper — they move care forward, and sometimes they save a life. That's the standard we understand, and hold our network to, every page, every day.
Getting every fax there, every time, is how we've earned trust with our clients.
Pour your volume on. The network won't flinch.
A backbone has to do more than complete one fax — it has to absorb your peaks, stay up through anything, and reach every destination. Ours is engineered for all three.
High sustained throughput
High sustained pages-per-minute and deep concurrency, so heavy automated traffic flows without queuing up behind itself.
Absorbs your spikes
Monday-morning surges and end-of-day batch dumps get absorbed, not throttled — latency stays predictable even when your volume isn't.
Optional traffic isolation
For the largest volumes, dedicated capacity keeps your traffic in its own lane — so a surge elsewhere on the network never becomes your problem.
Automatic rerouting
Redundant carrier paths and geographic redundancy back the 99.999% SLA. If a route degrades mid-flight, the fax reroutes — you never see it.
Receive as reliably as you send
Inbound is half the job for a platform. High DID density and reliable inbound delivery mean the faxes coming to you land as dependably as the ones going out.
Every destination, including the hard ones
Full US reach — including the rural and hard-to-reach exchanges where weaker networks quietly fail — plus international coverage where you need it.
Move thousands of numbers, without the migration stalling.
High-volume fax means porting at scale — and porting is exactly where most migrations bog down. We're built to make it the part you stop worrying about.
Years of porting experience
A dedicated porting team that does this every day, at the volume carriers actually port — so even large, messy ports are routine instead of a first attempt.
We port as an FCC-licensed carrier
We submit port requests to the losing carrier as a carrier — not as a "winning fax company." That authority carries more weight and clears ports more cleanly.
High visibility into every request
Deep visibility into port-request status means fewer surprises, faster diagnosis when something stalls, and a clear, honest picture of where every number stands.
Straight talk on the hard ones
A support team that walks you through difficult ports and gives you honest timelines and expectations — realistic dates that hold, not optimistic ones that slip.
When the network is the product.
For teams putting serious page volume on our API, three things matter: the transport network, the API, and the price. We're engineered to win on all three.
The most reliable path, every time
Dual TDM + SIP transport, uncapped speed, and AI routing mean more of your faxes land on the first attempt — including the hard ones.
Drop your volume on, scale instantly
A clean, high-throughput API designed for heavy automated traffic, with elastic SIP capacity that scales the moment your volume does.
Lower real cost per delivered fax
Because more faxes complete the first time and porting is carrier-grade, your true cost per delivered fax comes out lower — fewer failed attempts means less wasted spend across millions of pages.
The best online fax service for reliable fax delivery.
#1 ranked by Forbes Advisor —highest consumer sentiment in its online fax rankings.
Outstanding customer satisfaction
Customers on G2 consistently rate WestFax highly for performance and service.
Read customer reviews
A backbone you build on — with a live connection.
The same network, exposed through an API designed for heavy, automated, high-volume traffic.
The difference is the connection itself: a constant webhook link that pushes every status event — queued, delivered, failed, retried — to your system the instant it happens. No polling, no lag. Your product always knows exactly where every fax stands.
Explore the full API →
Security & Compliance
Compliant by Design
You’re trusting us with PHI that can decide someone’s care. We hold the certifications that prove we’ve earned it — and we’ll sign the paperwork to back it.
R2 Certified
Compliant · BAA available
Type II Audited
Compliant
- PIPEDA
- CJIS
- GLBA
- FERPA
- TX‑RAMP
Every fax is protected with end-to-end encryption, strict role-based access controls, and complete audit trails — backed by a Business Associate Agreement.
Explore complianceDon't take our word for it. Run your traffic.
We'll run a slice of your real fax volume alongside your current provider and compare the results — on your destinations, not a demo. The numbers make the case.
First-attempt and final completion on your real destinations, side by side with your current provider.
Time on the line at full 33,600-baud speed versus capped routes.
What each delivered page really costs once failed attempts and retries are counted.
FAQ
Frequently Asked Questions
WestFax holds the #1 completion rate in the industry. Dual TDM + SIP transport, AI-driven routing built on 26 years of data, and automatic rerouting mean more faxes land on the first attempt — backed by a 99.999% uptime SLA.
WestFax is an FCC-licensed carrier that operates the world's largest TDM fax network. Most providers resell someone else's routes and pick the cheapest path; we own the transport and route every fax for your success, never least-cost.
No. Many cloud fax providers cap transmissions at 9,600 baud; WestFax runs all the way up to full Group 3 and V.34 super-G3 speeds of 33,600 baud. Faster transmission means fewer failures — and a lower real cost per delivered fax.
Yes — that's what it's built for. High sustained throughput, burst absorption for spikes, optional dedicated capacity for the largest senders, and elastic SIP that scales the moment your volume does.
Yes, at any scale. Because WestFax ports as an FCC-licensed carrier, even large multi-thousand-number ports clear cleanly — with a dedicated porting team, deep visibility into every request, and honest timelines that hold.
Still have questions?
Our team can help you scope a migration, plan an API integration, or run a parallel pilot on your real traffic.
Yes. WestFax is HITRUST r2 certified, SOC 2 Type II audited, and HIPAA compliant with a BAA available as standard — with encryption in transit and at rest across the network.
Yes. The same network is exposed through a high-throughput REST API with a constant webhook link that pushes every status event — queued, delivered, failed, retried — to your system the instant it happens.
Run a parallel pilot. We'll carry a slice of your real fax volume alongside your current provider and compare completion rates, speed, and cost per delivered fax — on your destinations, not a demo.