Almost every travel eSIM on the market sells data the way airlines sell seats: fixed blocks, priced up front, use-it-or-lose-it. Buy 5 GB for a week in Spain, use 2 GB, and the remaining 3 GB evaporates when the validity window closes. A small group of providers bills the opposite way — metered, usage-based, pay-per-MB — and if your usage is light or unpredictable, the difference in real cost is dramatic. This guide compares every notable metered and crypto-friendly eSIM in 2026, honestly, including the ones that compete with us. Our own numbers up front, so you can measure the rest against them: Roamzy bills per megabyte at each country's local rate, from $0.0009 per MB — which is $0.92 per GB in France, $1.43 in Spain, Italy, Germany and the UK, and $3.28 in the United States — drawn from a prepaid USDT/USDC balance that never expires, with a $20 minimum top-up and no monthly fee.
One caveat worth setting up front: a sticker price per gigabyte is not what a pack costs you. It is what it would cost if you finished it. The gap between those two numbers is the reason this comparison exists.
What is a metered (pay-per-MB) eSIM?
A metered eSIM — also called a pay-per-MB, usage-based, or pay-as-you-go eSIM — charges you only for the data you actually consume, deducted from a prepaid balance at a per-megabyte or per-gigabyte rate, instead of selling a fixed package that expires after a set number of days. There is no bundle to size, no validity countdown, and nothing to forfeit: 180 MB used means 180 MB billed. We wrote a deeper technical explainer in how pay-per-megabyte eSIM billing works, but that one sentence is the whole model.
Three terms get used interchangeably in this market, and it is worth knowing all of them because providers self-describe differently: metered billing (the telecom term), usage-based pricing (the SaaS term), and pay-as-you-go (the consumer term). They all mean the same thing: the meter runs only while you use data.
Why fixed GB packages quietly waste money
Industry usage guides consistently put a typical traveler at roughly 0.8–1.2 GB per day, with light users closer to 0.3–0.5 GB — about 3–5 GB across a week for most people (see our breakdown of how much data you actually need). Yet the packages pushed hardest by the big sellers are 5 GB, 10 GB, or "unlimited" — sized for the heaviest tail of users and priced accordingly.
The package model has two built-in losses for buyers:
- Breakage. Unused gigabytes expire. Airalo's own help pages state that validity starts when the eSIM first connects in the destination and cannot be extended. Whatever you don't use inside that window is gone.
- Oversizing. Because running out mid-trip is painful, usage guides openly recommend adding a 20–30% buffer on top of an already generous estimate. That buffer is pure margin for the seller.
Unlimited plans solve breakage but at a premium: Holafly's unlimited plans are advertised at about $3.90 for one day, $27.30 for 7 days, and $74.90 for 30 days in most destinations. That is excellent value if you stream video all day — and a poor deal if you use maps, messaging, and email. Metered billing removes the sizing decision entirely, which is also why it is the only model that works for machine buyers whose usage cannot be predicted.
Pay-per-MB and crypto eSIMs compared (2026)
Only two providers on this list are genuinely metered. The rest sell packages but earn a place here because they serve the adjacent search intent — buying an eSIM with crypto, without KYC — and deserve fair credit for what they do well. Third-party prices below are as advertised by each provider at the time of writing; check before you buy.
| Provider | Billing model | Crypto / no-KYC | Expiry | Coverage | Notes |
|---|---|---|---|---|---|
| Roamzy | Metered, per-MB from a prepaid balance | USDT/USDC (11 stablecoin/network combos); no account, no email, no KYC | Balance never expires | One eSIM, 193 countries | Agent-native (MCP server + REST API); 20% recurring referral |
| Silent.Link | Pay-as-you-go balance, per-GB rates by country | BTC, Lightning, USDT; no email, no KYC | Balance never expires | 160+ countries (advertised) | The privacy pioneer; entry eSIM advertised at ~$9 with starter balance |
| encryptSIM | Fixed packages | BTC, ETH, SOL, USDT, USDC + cards; no KYC | Package validity window | 200+ destinations (claimed) | Privacy-first packages; card option is handy |
| Cryptorefills | Fixed packages | 20+ cryptos across many networks; no KYC | Package validity window | 180+ countries (advertised) | Crypto digital-goods marketplace; eSIMs advertised from ~$5 |
| BitJoy | Fixed packages | 20+ cryptos incl. BTC, USDT, USDC | Package validity window | 190+ countries (varies by plan) | Advertised from ~$2.50/GB; rare 5-day money-back guarantee |
| CryptoeSIM.io | Fixed packages | 300+ cryptos; no account, no KYC | Plan validity, up to 90 days | 190+ countries (advertised) | Plans advertised from ~$3; data-only |
| Airalo | Fixed packages + some unlimited | Cards only; account required | Validity starts on first connection, not extendable | 200+ destinations | Biggest catalog; strong prices for predictable usage |
| Holafly | Unlimited daily plans | Cards only; account required | Plan length, 1–90 days | Global, per-destination plans | Advertised ~$3.90/day unlimited; best for heavy streamers |
Fair credit where it is due
Silent.Link deserves genuine respect: it pioneered the no-KYC, pay-as-you-go eSIM years before anyone else, requires not even an email address, and its balance never expires — the same properties we consider table stakes. The honest trade-off reviewers consistently note is price: third-party reviews put its effective per-GB rates at around $1.50/GB in much of Europe and the US, typically above what package discounters charge, and report considerably higher rates in some developing countries. You are paying for privacy and flexibility, and for many buyers that is the right trade. Our full privacy-focused rundown is in best no-KYC crypto eSIMs.
BitJoy is arguably the best pure package deal in the crypto niche — advertised pricing from about $2.50/GB and a 5-day money-back guarantee that nobody else on this list offers. Cryptorefills wins on payment breadth (20+ coins across a dozen networks) if you want an eSIM as one purchase inside a larger crypto shopping trip. encryptSIM is the pragmatic middle: no-KYC crypto checkout plus a card option for when you need it. CryptoeSIM.io accepts an enormous range of coins with no account at all. None of them, however, are metered — you are still sizing a package and racing a validity clock.
Where Roamzy fits
Roamzy is one global eSIM covering 193 countries, billed strictly per megabyte from a prepaid stablecoin balance. There is no package to choose, no plan per country, and the balance never expires. Current per-MB rates on popular routes: Spain $0.0014, Turkey $0.0015, Thailand $0.0021, Japan $0.0033 per MB — roughly $1.43 to $3.38 per full gigabyte, except you never have to buy a full gigabyte. A 10-day trip to Spain using 2.5 GB costs about $3.60 total. All 193 country rates are on the live pricing page.
Payment is USDT or USDC across 11 stablecoin/network combinations, settled via NowPayments. Checkout is anonymous-first: no account, no email, no KYC, instant QR activation. And because the whole flow is API-shaped, Roamzy is also the connectivity layer AI agents use to buy their own data — a remote MCP server with 12 tools plus a REST API, no human sign-up required (details for builders on the agents page).
One more thing unique in this table: every Roamzy account — including a fully anonymous one — earns 20% of every real cash payment made by anyone it refers, recurring forever, not a one-off bounty. The fine print is short: withdrawals start at 50 USDT and go through manual approval, and an anonymous account accrues earnings but must be claimed (by adding a contact) before it can withdraw. We compared this against the other programs in best eSIM affiliate and referral programs.
Who should pick what
- Light or unpredictable usage, privacy-minded: a metered eSIM — Roamzy for per-MB billing and 193-country reach, Silent.Link if you specifically want Bitcoin/Lightning settlement and its longer track record.
- Heavy streamers and hotspot users: Holafly unlimited. Metered billing is honest, and honesty cuts both ways — at 3 GB+ every day, a flat daily rate wins.
- Predictable mid-size usage, card payment fine: Airalo's catalog is the market's largest and its package prices are sharp — just remember validity starts at first connection and unused data expires.
- Crypto payment, package model acceptable: BitJoy for advertised price and its refund window; Cryptorefills for coin breadth; CryptoeSIM.io or encryptSIM for account-free checkout.
- AI agents and automated buyers: metered is the only billing model that works without a human sizing packages — see which eSIM an AI can actually buy. Long-stay nomads benefit for the same reason: one balance, every border.
FAQ
Is pay-per-MB always cheaper than a data package?
No. Metered billing wins when usage is light, bursty, or unpredictable — the majority of travelers, who use 3–5 GB a week or less. If you consistently consume several gigabytes daily, an unlimited plan (Holafly advertises ~$3.90/day) or a large discounted package (BitJoy advertises from ~$2.50/GB) can cost less than any per-MB rate.
Can I buy a metered eSIM anonymously, without KYC?
Yes. Both genuinely metered providers are also no-KYC: Roamzy requires no account, email, or ID and settles in USDT/USDC; Silent.Link requires no email and settles in BTC, Lightning, or USDT. Several package sellers (encryptSIM, Cryptorefills, BitJoy, CryptoeSIM.io) also skip KYC for crypto checkout.
Does data on a metered eSIM expire?
On the two metered providers here, no — your prepaid balance sits until you use it, with no validity window. This is the structural opposite of package eSIMs, where validity typically starts at first connection and unused gigabytes are forfeited.
Can an AI agent buy a pay-per-MB eSIM by itself?
Yes — this is exactly what metered, usage-based billing plus machine-friendly payments enables. Roamzy exposes a remote MCP server and REST API that work anonymously, so an agent can quote a per-MB rate, pay in stablecoins, and receive an activation QR with no human in the loop. On Roamzy an agent pays the same published rates a person does: 100 MB of data in France costs $0.09 and 1 GB in the United States costs $3.28, drawn from a prepaid balance that never expires, with no subscription. More in our agentic commerce guide.