Need a Postmark alternative with crypto payment? KingSMTP accepts Bitcoin, USDT and Monero — making it one of the only transactional SMTP services you can pay for anonymously without a credit card.
Why look for a Postmark alternative?
- Postmark pricing starts at $15/month — no annual plan available
- No cryptocurrency payment option
- US-based — subject to US data regulations
- Requires credit card and identity verification
- No inbound email routing (MX) included
- Limited to transactional email only — no routing or forwarding
KingSMTP vs Postmark
| Feature | KingSMTP | Postmark |
|---|---|---|
| Free trial | 7 days, no credit card | 100 test emails only |
| Payment methods | Bitcoin, USDT, Monero | Credit card only |
| KYC required | No | Yes |
| Privacy-focused | Yes — outside EU/US | No — US-based |
| Starting price | $49/year | $15/month |
| SMTP & API access | Yes | Yes |
| Email routing (MX) | Yes | No |
| WordPress plugin | Yes | Third-party only |
| Open-source infrastructure | Yes (Postal) | No |
Why developers choose KingSMTP over Postmark
- Pay with Bitcoin or crypto — no bank, no KYC, no restrictions
- Significantly cheaper — $49/year vs $180+/year for Postmark
- Privacy-first — hosted outside EU and US jurisdiction
- Free 7-day trial — full access, no credit card
- Inbound email routing included — receive and forward emails
- 99% inbox rate — clean IPs, DKIM/SPF setup included
Pricing
| Monthly volume | Price per year | Price per month |
|---|---|---|
| Up to 5,000 emails | $49 / year | Annual only |
| Up to 10,000 emails Popular | $79 / year | Annual only |
| Up to 20,000 emails | $159 / year | Annual only |
| Up to 50,000 emails | $489 / year | $49 / month |
| Up to 100,000 emails | $989 / year | $99 / month |
| 100,000+ emails | Custom pricing | Custom pricing |
FAQ
Is KingSMTP a good Postmark alternative?
Yes. KingSMTP is cheaper, accepts crypto payments, and includes email routing that Postmark does not offer.
Can I pay with Bitcoin?
Yes. We accept Bitcoin, USDT, Monero and other cryptocurrencies. No credit card accepted.
Is there a free trial?
Yes — 7 days, no credit card, no KYC. Full access with up to 5 test recipients.
Does KingSMTP work with WordPress?
Yes. We have a dedicated WordPress SMTP plugin in the WordPress plugin directory.