Delta might be a bit more popular than Hellofax. We know about 1 link to it since March 2021 and only 1 link to Hellofax. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I second the vote for hellofax.com. It's what I used for my SSDI app, and am currently using to handle legal stuff following the death of both parents in the past year. Source: about 1 year ago
The one with getdelta.io is different, it returned HTTP 404, which "indicates that the origin server did not find a current representation for the target resource or is not willing to disclose that one exists.". Source: about 1 year ago
eFax - Over 11 million people use eFax every day for their fax communications.
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faxZero - Internet fax application.
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