Pay per page. Nothing else.
No seat licensing. No monthly minimums. No enterprise tier to send your first fax with HIPAA. Volume discounts kick in automatically as you scale.
Volume tiers
One simple per-page rate. Your tier adjusts automatically each month based on usage.
| Volume | Per page |
|---|---|
| Standard | $0.060 |
| 100,000+ pages / month | $0.048 |
| 1,000,000+ pages / month | $0.036 |
All prices in USD. International destinations may incur per-country surcharges. Tier transitions happen automatically at the start of the next billing cycle. There is no contract, no commitment, and no penalty for dropping back down.
Everything is in. No tiers, no gates, no upgrades to unlock features.
Compliance and security
- Free signed BAA, available from your dashboard
- AES-256 encryption at rest
- TLS 1.2+ in transit
- Per-workspace immutable audit log
- Zero-footprint mode (HIPAA minimum-necessary)
- Sandbox and live environment isolation
Developer experience
- HMAC-SHA256 signed webhooks with replay protection
- Idempotency keys on all POST requests
- Built-in configurable retries (default 3, up to 8)
- Stable error taxonomy with actionable codes
- OpenAPI 3.1 spec and llms.txt
- Magic test numbers for every failure mode
The only thing that changes between volume tiers is the per-page rate. Every feature, every compliance posture, every API capability is identical from day one of self-serve. We don’t believe in gating webhook signatures or idempotency keys behind a higher tier.
How we compare
| Provider | Entry per page | Volume rate | Plan minimum | API gate | BAA |
|---|---|---|---|---|---|
| mintfax | $0.060 | $0.036/M+ | None | None - all tiers | Free, every paid tier |
| Sinch (Phaxio v3) | $0.045 | Custom | None | None | Free, self-serve |
| Telnyx | $0.007 + SIP | Custom | None | None | Free, on request |
| Notifyre | $0.030 | Custom | None | None | Free, every paid tier |
| Documo | $0.030 (annual) | Custom | $150/mo Business | Business+ tier | Free |
| Fax.Plus / Alohi | $0.030 overage | Custom | $79.99/mo Enterprise | Enterprise plan | Enterprise plan |
| eFax Protect | ~$0.050 | Custom | $49.99/mo | Corporate+ tier | Protect+ tier |
| RingCentral Fax API | Bundled | Bundled | RingEX seats | UCaaS bundle | Enterprise tier |
| ClickSend | $0.029 | Custom | None | None | Will not sign |
Pricing verified against vendor sites May 2026. Telnyx per-page rate excludes SIP trunking minutes; total cost depends on call duration. Documo's $0.030 rate requires an annual Business contract. Fax.Plus's $0.030 is the overage rate after the 4,000-page Enterprise allowance.
Pricing FAQ
Do credits expire?
No. Once you load credits, they stay loaded until used. There’s no monthly burn-down clause and no penalty for slow months.
What if a fax fails? Do I still pay?
No. mintfax holds the credit when you submit the fax and only captures the charge once delivery succeeds. If the carrier returns a permanent failure, the hold releases and your balance is unaffected. Idempotency keys prevent retried HTTP requests from double-charging the same fax.
How does auto top-up work?
You set a threshold (for example, “top up by $50 when balance falls below $20”) in your dashboard. mintfax bills your card on file when the threshold trips. You can disable auto top-up at any time and switch to manual top-ups.
Is there a free tier?
The sandbox is free, indefinite, and fully featured: signed webhooks, signed BAA, real OpenAPI surface, magic test numbers. Live faxes (real carriers, real PSTN delivery) are billed per page from your loaded credit balance. The sandbox is the integration; live mode is execution.
What happens at very high volume?
The 1,000,000+ pages/month tier publishes a $0.036 rate. Above that, contact us for a custom rate. There is no enterprise tier with seat licensing or contract minimums; the negotiation is purely about per-page rate at scale.
Send your first fax in 5 minutes.
Sandbox is free. Signed BAA included. Real API.