# OnlineSim alternative

OnlineSim is one of the older marketplaces, with activations, rentals and an API. SMS Nitro offers the same product types with clearer billing and live success data.

## Why switch from OnlineSim?

If you want to see the success rate of a country before buying, pay only when the SMS arrives, and keep your tooling through an SMS-Activate-compatible API. If OnlineSim works for your apps, keep it and use SMS Nitro as a fallback.

## What OnlineSim is

One of the older marketplaces, operating since 2013: one-time activations, rentals from one to 30 days that can be extended, and a documented API.

## 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 OnlineSim to SMS Nitro

Create an account, top up from $5 and compare the prices of the apps you use most. If you used OnlineSim 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.

## FAQ

**Does SMS Nitro offer long rentals?** Up to 30 days per period, extendable before expiry.

Source: https://smsnitro.com/compare/onlinesim