New Availability

New Czech numbers (short-term) and Czech / UK (long-term) will be available starting from Monday 15th June. It might take us a couple of days depending on our load to get everything up and running. Thank you for your continued patience!

56K+
Active Users
48K+
Messages Sent & Received
189+
Countries Supported
99.9%
Uptime

New product

Mobile

Your own permanent eSIM with mobile data — never expires as long as it's renewed. Phone number pairing coming soon.

  • Phone number (coming soon)
  • eSIM — no physical SIM needed
  • €5 setup + €5/mo — never expires
View Plans & Pricing

Our Services

Secure messaging, Crypton Travel eSIM, Crypton Mobile, and powerful API access - all in one platform.

Core products

Phone Numbers

from €5.00/mo

Get a physical phone number with end-to-end encryption. Perfect for privacy-conscious users who need a second number.

  • End-to-end encryption
  • Physical SIM cards
  • Global coverage
  • API access available
Get Started

Email Forwarding & Aliases

from €1.00/mo

Create email aliases across multiple privacy-focused domains and forward to any existing inbox.

  • Email aliases
  • Forward to any email
  • Privacy-focused
  • Custom domains coming soon
Get Started

For developers and power users

SMS Verification

from €1.43/code

Receive SMS verification codes from any service. One-time use numbers for account signups - fast, secure, and anonymous.

  • €1.50 flat rate per code
  • 30 minute session
  • 70+ services supported
  • Instant number assignment

Also from Crypton

Bring Your Own Device NEW

Run Crypton on hardware you already own — keep your privacy, lose the carrier. Also available self-hosted with Crypton BYOD Platform.

Learn more

Partner Program NEW

Earn recurring revenue by referring customers or hosting Crypton infrastructure.

Become a partner

Companion App

Turns your Android device into a Crypton SMS gateway — for Partners, BYOD on crypton.sh, and self-hosted BYOD servers.

Get Companion App

Crypton for Android

Native client app — your full Crypton account, messages, and dashboard on your phone.

Get Android app

Use Cases

Discover how Crypton.sh can help protect your privacy and enhance your digital security

Privacy Protection

Keep your personal number private and stop corporations from selling it to advertisers. Use a separate number to avoid spam and protect your identity.

  • Stop corporate advertising
  • Block spam messages
  • Protect your identity

Account Verification

Receive verification codes for 2FA, banking, and crypto exchanges. Also verify additional accounts on WhatsApp, Telegram, Gmail, and use as a domain whois number.

  • 2FA & banking
  • Additional accounts
  • Domain whois

Crypton Travel eSIM

Get instant data in 145+ countries with Crypton Travel eSIM. No physical SIM needed—activate via QR code in seconds.

  • 145+ countries
  • Instant activation
  • QR code setup

Powerful API

You can use our powerful API to access your messages and send new ones via any device... iPhone, Android? Terminal? Go ahead!

  • Cross-platform access
  • Any device support
  • Terminal compatible

Business Use

Separate business communications from personal. Use dedicated numbers for customer support, marketing campaigns, or team coordination.

  • Customer support
  • Marketing campaigns
  • Team coordination

Zero-Access Encryption

Your messages are tied to your personal keys—only you can unlock them. New accounts add post-quantum protection (ML-KEM-768, the NIST standard in the same family as Kyber) plus strong, widely used cryptography. We never get copies of keys that would let us read your inbox.

  • Post-quantum hardened keys
  • Your personal keypair
  • We cannot read your messages

Simple Conversations

You can both receive and send messages with our service. Receiving is free as long as you have a number. Sending is paid using our pay-as-you-go pricing.

  • Free receiving
  • Pay-as-you-go sending
  • Simple pricing

Stop SIM Card Swap Scams

Your mobile provider most likely does not protect you from malicious actors stealing your SIM via a swap scam, we do.

  • SIM swap protection
  • Secure authentication
  • Enhanced security

Developer Integration

Integrate secure messaging into your applications with our powerful API. Send and receive messages programmatically with full encryption support.

  • RESTful API
  • Full documentation
  • Webhook support

How It Works

Get started with Crypton.sh in just a few simple steps

1

Sign Up

Create your account in seconds. Use an account number - no email required.

2

Choose Your Service

Select a physical number, virtual number, or Crypton Travel eSIM that fits your needs.

3

Activate & Use

Your number is activated instantly. Start receiving SMS or using Crypton Travel eSIM right away.

4

Stay Protected

All your messages are encrypted with your personal key. Your privacy is our priority.

Partner Program

Earn Crypto With Your Phone Numbers

Got spare SIM cards? Join the Crypton Partner Program and earn 50% of every SMS verification and short-term rental. Provide numbers from any supported country, manage everything from your Android device, and get paid in USDT or Monero.

Log In to Apply Learn More
50%
Revenue Share
USDT · XMR
Crypto Payouts
Easy Setup
Companion app + your SIM cards
Any Country
Provide numbers worldwide
No upfront costs
Real-time dashboard
Flexible payouts in crypto
Set your own prices

Use Your Own Phone for Private SMS

Connect your Android device and existing SIM cards to Crypton. Send and receive SMS through your own phone — privately, from your browser, at a flat monthly rate. Operators can also self-host with Crypton BYOD Platform.

Use your own SIM cards
Free outgoing SMS via device
Real-time device monitoring
Cancel anytime
Self-host option for your infrastructure

Pricing

Choose the plan that fits your needs. All plans include end-to-end encryption and privacy protection.

Physical Numbers

Short-term or long-term (3–12 month bundles)

€20 /mo

Starting price

Choose between short-term (shared gateway) or long-term (dedicated device) rental options. There are currently 10+ phone numbers available across multiple countries.

Czechia
€20-32/mo
S: 10+
  • Short-term & long-term options
  • Short-term: 1–12 months
  • Long-term: 3–12 month prepaid bundles
  • End-to-end encryption
  • Full API access
Rent a Number

Crypton Travel eSIM

€1.08 per plan

Starting price

Get instant data connectivity in many countries with 2859 data plans available.

  • 145+ countries available
  • Instant QR code activation
  • No roaming charges
  • Flexible data plans
Switching providers
Permanent eSIM line — voice, SMS, and data on a real carrier.
Explore Crypton Mobile
Browse Crypton Travel eSIM

Virtual Numbers

€5.00 per month

Starting price

Browse available phone numbers across different countries with transparent pricing.

€5 10+ Canada €12 10+ Lithuania €12 10+ Netherlands €10 10+ Sweden €5 10+ United States
  • Instant activation
  • Global coverage
  • Transparent pricing
  • API access available
Browse Numbers

Message Pricing

Simple, transparent pricing for all your messaging needs

Incoming
FREE
always
Outgoing
€0.00
per message
Features
  • Incoming messages free
  • Pay per outgoing message
  • No monthly fees
  • Global SMS support
Get Started

Other Crypton plans

Crypton Mobile

from €5.00 activation
View

Email Forwarding & Aliases

from €1.00/mo
View

SMS Verification

from €1.43/code
View

Bring Your Own Device

from €3.00/mo
View

Supported Payments

Cryptocurrencies recommended

For maximum privacy and anonymity, we recommend using cryptocurrency payments.
We support a wide range of cryptocurrencies including:

Monero
Bitcoin LN
Ethereum
LTC
XRP
USDC
TRX
ZEC
DASH
DOGE

Credit card payments available

All major credit card providers are supported for your convenience.

Direct bank transfers are also available from UK, US, EU, and PL bank accounts.

Visa
Mastercard
Amex
Apple Pay
Google Pay
WeChat Pay

Why Choose Crypton.sh

See how we compare to other services

Feature Crypton.sh Other Services
End-to-End Encryption Yes No
Open Source Code Yes No
Privacy-Focused Yes Limited
TOR Support Yes No
Cryptocurrency Payments Yes Limited
No Data Collection Yes No

Developer-Friendly API

Integrate Crypton.sh into your applications with our powerful REST API

RESTful API

Simple HTTP requests to send and receive messages programmatically

Webhook Support

Get real-time notifications when messages are received

Full Documentation

Comprehensive API documentation with code examples

SDK Support

Libraries available for popular programming languages

Quick Start Examples 

curl -X GET "https://crypton.sh/api/v1/user" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Accept: application/json"
curl -X POST "https://crypton.sh/api/v1/conversations/send-message" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{"conversation_uuid": "YOUR_CONVERSATION_UUID", "message": "Hello world!"}'
curl -X GET "https://crypton.sh/api/v1/phones" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Accept: application/json"
View API Documentation

FAQ

All of your frequently asked questions answered.

We store encrypted material on our servers, but we never see your passphrase, so we cannot open your messages ourselves. New accounts use ML-KEM-768 (post-quantum protection, NIST standard, related to Kyber) together with strong conventional crypto. Some older accounts may still use a previous RSA-style setup until keys are refreshed. When you are logged in, you can export a key backup from the dashboard.
You're right, nothing and nobody can be trusted, however we have made our best efforts be as transparent as possible and have therefore released our user encryption module source code on GitLab, you can access it by clicking the icon in the footer. The general rule is that you shouldn't provide any information you wouldn't want to be leaked.
No, while we make sure to encrypt any data stored on our servers / infrastructure, data is not being encrypted as soon as it exits our systems onto the GSM / CMDA network.
Anything you want really, if you need to create a second account on Signal, Telegram, Whatsapp or any other service that requires a mobile phone number. You can even use it with social networks to stop them selling your data to advertisers. You can use it to message friends or relatives if you need to.
You can receive messages from anywhere and send to most countries. However, for short-term and virtual numbers, some countries have restrictions on direct SMS delivery. In these cases, your message is delivered via a secure web link instead. Long-term numbers use dedicated hardware and can send direct SMS to all countries without restrictions. Check our FAQ for the full list of affected countries.
More Questions & Answers

We're Here to Help

Get support when you need it, how you need it

Internal Support System

Create encrypted support tickets directly from your account. Get help with encrypted, secure communication.

SimpleX Chat

Reach us through SimpleX Chat for private messaging

Contact Support

Why Trust Crypton.sh

Built with privacy and security as our foundation

End-to-End Encryption

Your data is encrypted with keys only you can access

Open Source

Encryption module source code available on GitLab

Secure Infrastructure

Your data is stored on secure servers with privacy-focused hosting

No Message Reading

We cannot read your messages even if we wanted to

100%
Encrypted
0
Messages Read
24/7
Available
TOR
Supported

What Our Customers Say

Real reviews from real users who trust Crypton.sh for their privacy needs

Numbers are working everywhere. And this alone is quite rare… I have tried other services but the numbers were seen as reused by ex. Google.

Customer
Trustpilot

Crypton is a solid and reliable provider of mobile numbers for SMS verifications

Jon
Trustpilot

Great service! I am using it for a while and satisfied.

Ole
Trustpilot

Accepts monero, so it's a product for the people.

Neo
Trustpilot

It works great

Customer
Trustpilot

Great Service When Everything Works as Intended. Rented two numbers already as well as had an interaction with support about an issue I encountered. They were very helpful and added a feature to resolve my issue in less than a week.

Customer
Trustpilot

Been using Crypton.sh for a while now and overall it works well. I like the no-KYC policy and the encryption setup feels solid. Setup was smooth and delivery was quick. Support could be a bit faster, but aside from that it's been reliable so far. Good value for the price.

User
KYCnot.me

Affordable encrypted SIM service with strong privacy focus. Messages stay secure with personal key encryption.

Jack
KYCnot.me

Nice service, price is fair (14eur/mo), had no problems with numbers, I might be just lucky tbh

User
KYCnot.me