Guardarian

Guardarian is a fiat-to-crypto and crypto-to-fiat gateway that has operated since 2017, letting users buy, sell, and swap over 1,000 cryptocurrencies without opening an account. The platform sends purchased assets directly to a user-provided wallet — it never holds funds on users' behalf — and supports Solana (SOL) and a range of SPL tokens among its listed assets.

How It Works

The retail flow is straightforward: select a cryptocurrency and the fiat currency to pay with, provide a destination wallet address, send funds using a chosen payment method, and receive crypto in minutes. No registration is required to initiate a transaction; instead, Guardarian applies per-transaction KYC — email verification plus a government-issued ID upload — to meet EU-level AML requirements. The company states KYC verification typically completes in under five minutes.

Guardarian's non-custodial design means the platform never stores user assets or holds funds between the payment and delivery step. This also means it does not function as a traditional exchange with an order book or custody layer; it is a conversion corridor between fiat and on-chain assets.

Supported Assets and Payments

The platform lists more than 1,000 cryptocurrencies across multiple blockchains, from major assets like Bitcoin, Ethereum, and Tether through to altcoins, stablecoins, and meme tokens. Solana (SOL) is explicitly supported with dedicated buy and sell flows, and the platform carries Solana-native SPL tokens.

On the fiat side, Guardarian accepts 30+ fiat currencies and an unusually wide array of payment methods: Visa, Mastercard, Apple Pay, Google Pay, SEPA bank transfer, Revolut Pay, SWIFT, UnionPay, and more than 15 additional local payment options. This breadth makes the platform particularly useful in markets where card-only on-ramps fail to serve local payment habits.

Fee Structure

Guardarian charges flat fees rather than percentage-based transaction fees: EUR 2.49 per cryptocurrency purchase and EUR 3.49 per sale, regardless of transaction size. This structure favors larger individual trades, where a flat fee represents a smaller proportion of the total than the typical 1–3% percentage charge common at competitor on-ramps. The displayed rate includes all fees upfront, with no additional charges added at checkout.

Geographic Reach

The platform operates in more than 170 countries. Restrictions apply in jurisdictions with blanket crypto restrictions — including China, Iran, and Bangladesh — and in certain U.S. states (Alabama, Alaska, Hawaii, Nevada, New Mexico, Vermont, and Washington) due to local licensing requirements.

B2B Integration Products

Guardarian's business offering extends well beyond retail. Companies can embed Guardarian's exchange capabilities into their own products via two routes:

Widget: A customizable, plug-and-play embeddable widget that requires minimal development effort. Partners configure layout (narrow or wide), transaction direction (buy, sell, swap, or all), and visual theme (light or dark with custom color controls) before inserting a code snippet into their web application. The widget presents real-time exchange rates and supports the full range of Guardarian's payment methods and assets.

API: A REST API that gives developers direct control over the transaction lifecycle. Key endpoints cover API health checks, currency and market-info queries, rate estimation, and transaction creation. The API targets crypto businesses wanting to build bespoke on-ramp experiences without the constraints of a pre-built widget.

Partners earn affiliate revenue from transaction volume generated through their integrations. Guardarian provides fully assisted onboarding plus dedicated account managers. The company also publishes a suite of additional B2B products — G-OTC, G-Custody, G-Payments, G-RWA, G-OnePay, and G-Swaps — indicating an evolving set of institutional-facing services beyond the core on-ramp.

Regulation and Compliance

Guardarian operates through two registered entities:

• FinSeven CZ s.r.o. is registered in the Czech Republic (registry code 22304681) and holds a Virtual Asset Service Provider (VASP) license under Czech and broader EU regulatory frameworks.
• GRNTech Solution Inc. is registered in Mississauga, Ontario, Canada, as a Money Services Business with FINTRAC (registration C10001703).

As of 2025, Guardarian was operating under MiCA transitional provisions — the EU's Markets in Crypto-Assets regulation — targeting full compliance by December 2025. The company also states that internal controls are periodically reviewed by independent third parties, though it has not publicly named specific audit firms or certifications.

The non-custodial model provides structural security benefits: Guardarian does not accumulate user funds or private keys, limiting the attack surface that has made custodial exchanges targets for large-scale thefts. No significant security breaches have been publicly reported across the platform's eight-plus years of operation.

Solana Ecosystem Context

For Solana users and projects, Guardarian is one of several fiat gateway options for entering and exiting the ecosystem. Its no-account flow is particularly accessible to new users who want to acquire SOL without committing to a full exchange onboarding process. For builders, the B2B widget and API allow Solana-native applications — wallets, DeFi protocols, payment apps — to embed fiat conversion without managing the underlying compliance overhead.

The affiliate revenue model gives integrating projects a direct financial incentive to route user on-ramp activity through the Guardarian integration. The company has pursued partnerships to extend its distribution; a publicly announced collaboration with the non-custodial swap platform StealthEX illustrates how Guardarian positions itself as a licensed fiat layer that non-custodial crypto services can plug into without building their own regulated payments infrastructure.