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SimpleSwap alternative
SimpleSwap is an instant exchange: pick a pair, send a deposit, receive the swap — typically without registering and without connecting a wallet. Pemfy requires the wallet connection; that is the session. This page is about that fork in the road: what connecting buys you, what it costs, and the flows each model unlocks or forbids.
What SimpleSwap is
SimpleSwap is a non-custodial instant exchange with a broad asset list and floating and fixed rate options. The flow is deposit-based: funds go to their address, converted funds come back to yours. It is an exchange product, not a payment-link product: to our knowledge it offers no shareable pay-link equivalent.
The standout property is the absence of a wallet handshake. No extension popup, no network-switch prompt, no approval transaction. You operate entirely with addresses: paste a destination, send from wherever the funds live. For a meaningful share of users — exchange natives, hardware-wallet minimalists, the connection-wary — that absence is the feature.
Wallet connection: costs, honestly listed
Connecting a wallet is not free, even when no money moves. It exposes your address and balances to the page, asks you to evaluate network-switch prompts, and trains the most dangerous habit in crypto: approving whatever pops up. Blind signing — confirming a transaction whose details you did not read — is how most drainer attacks succeed, and every connection-based product, ours included, lives one careless click from that outcome. Mitigations are user-side: separate hot wallet with limited funds, reviewing every transaction's destination and amount, revoking stale token approvals. A product that never asks for connection sidesteps this entire category. Our product asks, every session — and the only honest way to frame it is as a cost we charge for the desk and pay-link features connection enables.
Flows only the deposit model serves
Consider coins sitting on a centralized exchange. With a deposit-based service, you withdraw straight to the exchange's deposit address and receive the converted asset at your destination — the funds never touch a self-custody wallet at all. A wallet-signed desk cannot serve this flow: there is no wallet to connect, and pasting an exchange withdrawal address as a "destination" misunderstands what the desk builds (an unsigned transaction for a wallet to sign, not a deposit to monitor). Exchange-to-exchange conversion, withdrawals that change assets mid-flight, and gifting crypto to someone with no wallet yet all belong to the deposit model. If that sentence describes your week, the comparison is over.
Minimums, dust, and lock windows
Deposit exchanges publish minimum amounts per pair — below them, network fees would eat the swap, so the flow refuses to start. Above them, fixed-rate options typically carry countdown windows: send the exact amount in time or the lock voids. These constraints are the model's immune system, and they shape UX more than any branding: exact-amount sends, timer pressure, and change-address handling for over/under-payments. Wallet-signed swaps have different constraints instead — per-chain gas in the native token, approval transactions for new ERC-20s, slippage settings. Neither constraint set is lighter in general; they bite different users. Small-balance users hit minimums; multi-token users hit approvals. Know which one you are.
Where the models touch
Briefly: Pemfy is a swap desk plus pay links, wallet connection as session, unsigned transactions from third-party routing, activity rows in Cloudflare KV until scheduled purges. EVM majors plus Solana, Tron, Bitcoin where routing exists. Fixed-rate locks: none — estimates until settlement. Pay links (chain/token/wallet/amount) are ours alone here, to our knowledge.
Connection-free against connected
Execution model: SimpleSwap — deposit to their address, receive converted funds. Pemfy — sign in your wallet; no deposit address involved.
Wallet connection: SimpleSwap works without connecting a wallet. Pemfy requires one — that is the session, with the phishing-surface cost described above.
Exchange-native flows: SimpleSwap serves CEX-to-CEX conversion directly. Pemfy cannot — no wallet, no desk.
Pay links: Pemfy builds them; SimpleSwap has no equivalent we know of.
Rate lock: SimpleSwap offers fixed-rate options with windows. Pemfy quotes are estimates until settlement.
Fees, limits, and supported assets: not verified here — both change. Read both screens for your exact pair.
When to pick SimpleSwap instead
If you do not want to connect a wallet, your funds live on an exchange, you want a fixed-rate quote, or you need an asset outside Pemfy's named chains, SimpleSwap is the practical choice. Connection-free operation is also the right default for anyone who treats every wallet popup as a threat — which, frankly, is good instincts.
Connection standards: what WalletConnect sessions actually grant
Modern wallet connections run over session protocols (WalletConnect being the widespread standard): the page proposes a session, your wallet displays the requested chains and methods, you approve, and a scoped channel opens. Crucially, a session grants proposal rights, not spending rights — every transaction still needs your explicit signature. What the session does expose: your addresses, balances the page queries, and your willingness to be prompted. Session hygiene follows: disconnect when done (our page forgets the address on disconnect by design), beware unsolicited session proposals (a prompt you did not trigger is an attack until proven otherwise), and keep high-value holdings in wallets that never connect to trading pages at all. Hardware wallets change the calculus further — the keys never leave the device, so even a fully malicious page cannot extract them, only propose transactions your device displays for physical approval. Connection-free exchanges sidestep all of this by never opening the channel; connection-based desks accept the channel and harden around it. Both are coherent; only confusion about what a session grants is dangerous.
Permissions hygiene checklist
A quarterly routine that costs twenty minutes and prevents the common disasters. One: review token approvals — unlimited allowances to routers you no longer use are standing permissions; revoke or narrow them with a reputable approval manager. Two: audit connected sessions — disconnect dapps you do not recognize or no longer use; stale sessions are prompt-spam vectors. Three: segregate funds — trading wallet with operating balances, vault wallet that never connects, exchange accounts as a third bucket. Four: verify before signing — destination address, amount, and contract on the wallet screen, every time, especially under time pressure (urgency is the attacker's favorite UX). Five: test with small amounts on new products, new chains, and new flows. None of this is product-specific, which is exactly why comparison pages should carry it: the users comparing desks are the users signing transactions, and signatures are where money is actually lost.
Questions we get about this comparison
Is connecting my wallet to Pemfy safe? Our page cannot move funds by itself — every move needs your signature. The risk is behavioral: signing something you did not read, on our page or any other. Use a dedicated hot wallet and read each prompt.
Can I send from Binance/Coinbase through Pemfy? No. Withdraw to your own wallet first, then use the desk — or use a deposit exchange and skip the wallet entirely.
What if I send the wrong amount to a deposit address? That is the deposit model's sharp edge: over/under-payments trigger refund or adjustment flows with their own timelines. Read the exchange's policy before sending, not after.
Which is better for tiny amounts? Compare minimums against gas: deposit minimums block small swaps on exchanges, while gas can exceed small swaps on wallet desks. The winner depends on the chain and the day.
Smart contract wallets and why deposits from them break
A growing share of users hold funds in smart contract wallets (multisigs, account-abstraction wallets, exchange vault products). Sending deposits from these to exchange addresses fails in specific, repeatable ways: some contracts cannot produce the exact expected amount due to internal fee logic; others send from a different address than the one that initiated, breaking attribution; callbacks and batched executions confuse memo-based matching. The rule across deposit services is consistent: send from an externally owned account (a normal wallet address) unless the service documents contract-wallet support. For wallet-signed desks the constraint inverts — contract wallets often cannot sign arbitrary transactions the page builds, or need their own owners' quorum first. Either way, know which wallet type you hold before choosing a flow: EOA goes anywhere, contract wallets go only where explicitly supported. When in doubt, route through a plain self-custody address as an intermediate — one extra step that prevents the most confusing support category in the business.
What we did not verify
SimpleSwap's current rates, limits, minimums, asset list, and compliance thresholds — check their site. On our side, whether a route exists for your pair today is only answerable by requesting a quote.
Why does every exchange ask for a refund address? Because failed and overpaid orders need somewhere to return to. Provide an address you control on the source chain, and double check it before sending. Skipping the refund address turns a recoverable hiccup into a support negotiation, so treat that optional field as mandatory.