Oh Fax and other fax services, side by side.
Oh Fax charges $2.00 for a fax of up to 100 pages, with no account or subscription. The same 10-page fax costs $10.00 at WiseFax ($1.00 per page) and $3.29 with FaxZero Premium.
What it costs to send a fax.
Each competitor figure comes from the source linked in its row. Prices change, so check with the provider before you rely on one. A dash means the source gives no figure; services sold as monthly plans have no per-fax price to compare.
| Provider | 10-page fax | Cost per fax | Pay-as-you-go rate | Subscription required / monthly price | Source |
|---|---|---|---|---|---|
| Oh Fax | $2.00 by card | $2.00, up to 100 pages | None; $2 per fax by card | No | ohfax.com |
| FaxZero Premium | $3.29 | $3.29 (≤25 pages) | — | No | faxzero.com |
| WiseFax | $10.00 | — | $1.00 (token) | $8/mo for a number | wisefax.com |
| eFax | — | — | $0.10 (API) | ~$16.95–18.99/mo (200 pages); Business $39.99/mo + setup | mfax.to |
| Dropbox Fax (HelloFax) | — | — | — | $9.99/mo (300 pages) | fax.plus |
| iFax | — | — | — | From $8.33–12.49/mo; API on Pro, $25/mo (1,000 pages) | mfax.to |
| Fax.Plus | — | — | — | Free plan: 10 pages. Paid: $6.99/mo (200 pages), $13.99 (500), $27.99 (1,000), $79.99 Enterprise | fax.plus |
| mFax (Documo) | — | — | — | ~$9/mo ($3/seat + $4 per 100 pages) | mfax.to |
| Documo | — | — | — | $25/mo Solo (300 pages); API on Business, $100/mo | documo.com |
| Phaxio / Sinch | $0.70 + $2/mo number | — | $0.07 US/CA; $0.10 international | — (number $2/mo) | mfax.to |
| RingCentral Fax | — | — | — | $22.99/user/mo billed annually ($27.99 monthly); 3,000 pages, 4.9¢ overage | ringcentral.com |
| Faxify | — | — | — | Free plan plus paid plans | natlawreview.com |
APIs, agents and accounts.
| Provider | API | Agent / MCP | Account required |
|---|---|---|---|
| Oh Fax | Yes (REST, prepaid balance) | Yes: MCP + MPP / HTTP 402, no account | No |
| FaxZero Premium | No | No | No (email required) |
| WiseFax | No public API | No | Yes |
| eFax | Enterprise/API | No | Yes |
| Dropbox Fax (HelloFax) | Legacy HelloFax API | No | Yes |
| iFax | Pro only | No | Yes |
| Fax.Plus | Enterprise only | Zapier | Yes |
| mFax (Documo) | Yes | No | Yes |
| Documo | Business+ | No | Yes |
| Phaxio / Sinch | Yes | No | Yes |
| RingCentral Fax | Yes (platform) | No | Yes |
| Faxify | Yes | Yes: hosted MCP (OAuth) | Yes |
When something else is better.
- You need to receive faxes
- Oh Fax only sends and gives you no fax number. A service with a fax number will receive them for you.
- You send a lot, every month
- At high volume, a monthly plan or a developer API with a lower per-page rate may cost less overall.
- The number is outside the US or Canada
- Oh Fax only sends to fax numbers in the US and Canada.
Sources.
Each competitor figure comes from the source linked below. Prices change, so check with the provider before you rely on one.
- faxzero.com/faq.php
- www.wisefax.com/pricing/
- mfax.to/blog/fax-api-pricing/
- www.fax.plus/resources/compare/review/best-online-fax-service
- www.fax.plus/rates
- www.documo.com/blog/faxplus-vs-mfax-a-comprehensive-comparison/
- www.ringcentral.com/fax/features/how-it-works.html
- natlawreview.com/press-releases/faxify-mcp-lets-ai-assistants-send-and-receive-real-faxes-claude-chatgpt-and