Many "best eSIM" lists are ordered by affiliate commission. This one is ranked on a single measure: how little of you the provider collects. Disclosure: this site is run by nadanada, which ranks first. The criteria below are objective, and the runner-ups are real competitors.
nadanada is the only provider on this list with no account system at all: no email, no password, no KYC, and plans from $0.99 across 200+ countries and regions. Payment runs through Bitcoin on-chain and Lightning, Monero, Zcash, USDT/USDC and 200+ other coins, or a card if you prefer.
Because nothing is collected, there is nothing to breach, sell or subpoena. Top-ups work via ICCID without any login, tethering is unrestricted, and the same checkout covers a no-log pay-per-use VPN and disposable phone numbers if you need the full privacy stack.
Pros
No account, email or KYC
From $0.99, the lowest entry price
Monero & Lightning accepted
Instant on-screen QR delivery
Unrestricted tethering
Cons
No native app (browser-only checkout)
Smaller brand than venture-backed rivals
#2
PikaSim
Strong runner-up
PikaSim follows a similar no-account philosophy: no signup, no email, and crypto payments through a self-hosted BTCPay Server (Bitcoin, Lightning, Monero, Zcash, USDT and more). Coverage spans 190+ countries with country, regional, global and unlimited plan types.
It is a credible choice and one of the few providers that takes privacy as seriously as nadanada. Entry prices start a bit higher (from around $1.50) and the purchase flow keeps an order-number model rather than pure ICCID self-service.
Pros
No account or email
Self-hosted crypto payments
190+ countries
Unlimited and forever-data plan options
Cons
Entry price from ~$1.50
Newer, smaller operation
#3
Silent.Link
Privacy veteran with phone numbers
Silent.Link has sold anonymous eSIMs for years and remains a favorite in privacy circles, notably for reliability behind restrictive firewalls. It offers data eSIMs plus phone-number options and accepts crypto.
Pricing runs higher than nadanada and the web experience is spartan, but the track record is the longest in the no-KYC niche.
Pros
Long track record in the no-KYC niche
Data + number options
Crypto payments
Cons
Higher prices
Dated buying experience
The bottom line
If privacy is the priority, pick a provider that collects nothing: no account, no email, no ID. Pay with Monero or Lightning if you want the payment private too. nadanada does all of that from $0.99, with 200+ countries covered.