Compare
The six questions that decide a fax service.
Sending a fax is a solved problem — every service on this list can do it. What differs is whether they’ll sign a BAA, what the page allowance actually is, what it costs to leave, and what happens to your history when you do.
Comparisons
Signal Fax vs HumbleFax
HumbleFax deserves credit for one thing: they made flat-rate faxing normal at a moment when the incumbents were charging per page and hoping you wouldn't notice. We think that was right.
Side-by-side table · verified August 2026
Signal Fax vs your fax machine
The machine works. That's the honest starting point — it has probably worked for years.
Side-by-side table
Signal Fax vs eFax
eFax is the name most people know, and it has been in this market far longer than we have. We're not going to restate their pricing and terms on our own website — those change, and a comparison table that goes stale becomes a false statement about someone else's business.
Buyer's checklist — we don't reprint their terms
Signal Fax vs SRFax
SRFax is a serious option, particularly for healthcare buyers, and plenty of practices are happy there. We're not going to reprint their terms on our site — they change, and a stale comparison table is a false statement about someone else's business.
Buyer's checklist — we don't reprint their terms
Signal Fax vs Fax.Plus
Fax.Plus is a well-built product with a clean interface, and for a lot of light users it's plenty. Rather than reprint their current plans here — where they'd go out of date and become a claim we can't stand behind — here are the questions that decide this choice, with our answers on the record..
Buyer's checklist — we don't reprint their terms
Why some of these have no table
Where we’ve read a competitor’s terms and can date it, you get a side-by-side. Where we haven’t, you get the questions instead of a table we can’t stand behind. Competitor pricing changes, and a stale comparison stops being a marketing claim and starts being a false statement about someone else’s business. We’d rather be useful than look thorough.