Looking for a Mailgun alternative that accepts Bitcoin or crypto? KingSMTP is one of the few transactional SMTP services where you can pay with Bitcoin, USDT or Monero — no KYC, no credit card required.
Why switch from Mailgun?
Mailgun is a solid service, but it comes with some limitations that push developers to look for alternatives:
- Mailgun requires identity verification (KYC) and credit card details
- Mailgun ended their free tier — you now pay from day one
- Mailgun is US-based and subject to US data regulations
- Pricing can get expensive at higher volumes
- No crypto payment option
KingSMTP vs Mailgun
| Feature | KingSMTP | Mailgun |
|---|---|---|
| Free trial | 7 days, no credit card | Limited free tier removed |
| Payment methods | Bitcoin, USDT, Monero | Credit card only |
| KYC required | No | Yes |
| Privacy-focused | Yes — hosted outside EU/US | No — US-based |
| Starting price | $49/year | $35/month |
| Transactional email | Yes | Yes |
| SMTP & API access | Yes | Yes |
| Email routing (MX) | Yes | Limited |
| WordPress plugin | Yes | Third-party only |
| Open-source infrastructure | Yes (Postal) | No |
Why developers choose KingSMTP as a Mailgun alternative
- Pay with Bitcoin or crypto — no bank, no KYC, no restrictions
- Privacy-first — hosted outside EU and US jurisdiction, minimal data collection
- Affordable — plans from $49/year vs Mailgun starting at $35/month
- Free 7-day trial — test everything before paying
- Built on open-source — powered by Postal, fully transparent infrastructure
- 99% inbox rate — clean IPs, proper DKIM/SPF setup
Pricing
| Monthly volume | Price per year | Price per month |
|---|---|---|
| Up to 5,000 emails | / year | Annual only |
| Up to 10,000 emails Popular | / year | Annual only |
| Up to 20,000 emails | 9 / year | Annual only |
| Up to 50,000 emails | 9 / year | / month |
| Up to 100,000 emails | 9 / year | / month |
| 100,000+ emails | Custom pricing | Custom pricing |
FAQ
Is KingSMTP a good Mailgun alternative?
Yes. KingSMTP offers transactional SMTP with higher privacy, lower pricing, and cryptocurrency payment options that Mailgun does not support.
Can I pay with Bitcoin instead of a credit card?
Yes. KingSMTP accepts Bitcoin, USDT, Monero and other cryptocurrencies. We do not accept credit cards or PayPal.
Is there a free trial?
Yes. Sign up for a 7-day free trial with no credit card required. Full access, up to 5 test recipients.
Does KingSMTP require KYC?
No. We do not require identity verification. You only need a domain to get started.
What types of email can I send?
Transactional emails only — password resets, order confirmations, account notifications, 2FA codes. We do not support marketing or bulk email campaigns.