5SIM alternative
5SIM is popular with developers for its operator selection and documented API. SMS Nitro shares the developer focus and adds an SMS-Activate-compatible endpoint for tools that do not speak 5SIM's own protocol.
What does SMS Nitro offer that 5SIM does not?
An SMS-Activate-compatible API alongside the REST API, success rates per country shown before purchase, and a price that is only charged when the SMS is delivered. 5SIM's strength is choosing a specific carrier; SMS Nitro ranks countries by what has actually worked recently.
What 5SIM is
A marketplace with activations and rentals, carrier-level selection, crypto payments and a documented API with Python and PHP examples, plus community-maintained client libraries.
What SMS Nitro does differently
- Private numbers only, never shared inboxes.
- Price frozen at purchase, charged only when the SMS arrives; the number is reserved for 20 minutes.
- Live price and recent success rate per app and country before you confirm.
- Card and crypto top-ups from $5, balance that never expires, no subscription.
- REST API plus an SMS-Activate-compatible endpoint, so existing tools migrate by changing the key.
- Catalog written in each language from scratch, with a legal entity, refund policy and support behind it.
Moving from 5SIM to SMS Nitro
Create an account, top up from $5 and compare the prices of the apps you use most. If you used 5SIM through its API, the SMS-Activate-compatible endpoint lets most scripts run unchanged after you swap the base URL and the key. Numbers that receive no SMS are never charged, so testing a new provider costs nothing when it fails.
SMS Nitro at a glance
| Billing | Pay only if the code arrives. If no SMS arrives before the number expires, the frozen amount returns to your balance automatically, in full. |
|---|---|
| Number reserved for | Up to 20 minutes per activation. Rentals from 24 hours to 30 days with unlimited incoming SMS. |
| Payment | Card via Stripe (Visa, Mastercard, Amex, Apple Pay, Google Pay) or crypto (USDC or SOL on Solana). Minimum top-up $5. Card top-ups carry a 10% processing fee; crypto has none. |
| Subscription | None. Pay per verification; your balance never expires. |
| Countries | 180+ countries, including the United States, the United Kingdom, Canada, India, Germany, Brazil, Indonesia and the Philippines. |
| Apps | 700+ apps and websites: WhatsApp, Telegram, Google, Instagram, TikTok, Discord, OpenAI, PayPal, Tinder, Amazon and more. |
| Developers | REST API plus an SMS-Activate-compatible endpoint. API key available after your first top-up. No API surcharge. |
| Support | Tickets from the dashboard and email, answered by people. |
| Price | From $0.02 per verification code, depending on the app and the country. |
Frequently asked questions
Can I choose the carrier on SMS Nitro?
Where the pool exposes it, yes; otherwise you choose the country and the physical-SIM or virtual pool.