Guardarian
Fiat on-ramp and off-ramp for buying, selling and swapping crypto by card or bank transfer, with partner APIs.
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Guardarian key facts
| Category | Fiat on-ramp |
|---|---|
| Platforms | Web, API |
| Custody | Non-custodial |
| US availability | Available via partner Bridge Building Inc., a FinCEN-registered MSB |
| Chains | 200+ cryptocurrencies |
| Fees | No extra fees on top of the quoted rate, per the homepage; refunds cost 5 EUR plus bank or network fees |
What is Guardarian?
Guardarian is a fiat-crypto gateway for buying, selling and swapping crypto, offered directly and to business partners. Its about page lists SEPA, Visa, Mastercard, UnionPay and SWIFT as payment options. Its terms say US customers are served through Bridge Building Inc., a FinCEN-registered MSB.
How Guardarian works
Guardarian converts fiat to crypto and back, and swaps between cryptocurrencies, sending the result straight to a wallet address you provide.
Its terms say the company does not provide custodian services for virtual or fiat currency. The service is run by FinSeven CZ s.r.o. in Prague and GRNTech Solution Inc., a FINTRAC-registered money services business in Ontario (C10001703). Payment options include SEPA, Visa, Mastercard, UnionPay, SWIFT and local bank transfers.
How to start with Guardarian
- The terms make KYC mandatory for all users, with verification partner Sum and Substance, and the About page says it takes up to 5 minutes with an ID document and a camera.
- US customers are redirected to Bridge Building Inc., a FinCEN-registered MSB, for separate KYC and AML checks; Bridge Building handles the fiat settlement.
- Prepare your own wallet address for the coin you buy.
- The terms list more than 100 prohibited territories, including Canada, China and Russia.
Guardarian fees and limits
The terms and About page do not publish a percentage fee schedule. The terms do set one fixed fee: refunds of unsuccessful transactions cost 5 euros or the equivalent, plus bank fees for SEPA or SWIFT, and take up to 10 business days to arrive.
Risks to know before using Guardarian
- Completed exchanges are final and non-refundable once the crypto is sent, and there are no refunds for imitation tokens or unsupported assets sent in.
- Guardarian can request more documents at any time for AML checks, which can hold up an order.
- The main terms are governed by Czech law, while US users also sign up to a partner's terms, so two companies are involved in one purchase.
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Where Guardarian ranks on DappAtlas
Listed next to Guardarian
Guardarian pros and cons
- Payment options include SEPA, Visa, Mastercard, UnionPay and SWIFT
- KYC takes up to 5 minutes, per its about page
- US customers served through a licensed partner
- No percentage fee schedule in its terms
- US users must pass separate KYC and accept Bridge Building Inc. terms
- Terms reserve IP-based blocking of prohibited jurisdictions
Guardarian FAQ
What is Guardarian?
Guardarian is a fiat-crypto gateway for buying, selling and swapping crypto, offered directly and to business partners. Its about page lists SEPA, Visa, Mastercard, UnionPay and SWIFT as payment options. Its terms say US customers are served through Bridge Building Inc., a FinCEN-registered MSB.
How much does Guardarian cost?
No extra fees on top of the quoted rate, per the homepage; refunds cost 5 EUR plus bank or network fees, according to Guardarian’s own page (checked Oct 1, 2026).
Is Guardarian available in the US?
Available via partner Bridge Building Inc., a FinCEN-registered MSB, according to Guardarian’s own page (checked Sep 26, 2026).
Does Guardarian hold my funds?
No. Guardarian is non-custodial: you keep your funds in your own wallet and sign each transaction.
Sources
How this page works
Sources: Guardarian: official site, Guardarian: Terms of service, Guardarian: About us. Data as of Oct 1, 2026.
Not affiliated with any project listed. Educational content, not financial advice.