SMS mailing
Onlinesim
Onlinesim’s marketplace connects customers to virtual-number services, while third-party providers supply connectivity and routing. The provider promotes coverage in more than 110 countries on one page and over 90 on another, so the coverage figures conflict.
This setup matters to media buyers assessing whether prepaid SMS access fits a workflow where delivery depends on external networks.
Editorial review based on public sources, without hands-on testing; facts checked on 2026-10-31.
This page contains no partner link to this service.
- Logo
Service logos remain the property of their owners; we use them for identification only.- Name
- Onlinesim
- Category
- SMS mailing
- Official site
- onlinesim.info · No link provided
- Facts checked
Virtual numbers and marketplace access
The provider’s pages and API documentation, checked 2026-10-31, describe these features and limits.
- Service: virtual numbers receive SMS for registration on websites, online services, and apps.
- Supported services: the homepage claims support across more than 1000 services.
- Country coverage: the homepage states more than 110 countries; the About page says over 90 countries.
- Number use: the provider states that each purchased number is used by only one client.
- Code visibility: the provider says numbers are not reused and only the customer can see their codes.
- Interface: the About page states availability in 10 languages.
- Marketplace access: available Active Numbers include SMS-reading functionality.
- Stated use cases: the homepage presents numbers for messengers, social networks, and services without a personal phone number.
- Registration: an account and email address are required to receive Marketplace Services.
Prepaid credits and excluded charges
The homepage says customers can try the service for free, while the marketplace terms describe prepaid access. Clients pay using methods available on the Platform, and prepaid amounts appear as Account credits.
The terms say prices may change at any time without notice. They exclude applicable taxes, duties, and levies, so the displayed price may not be the full charge.
Onlinesim’s terms exclude refunds for network outcomes, including non-delivery, delay, blocking, or rejection. Its refund policy also generally excludes amounts tied to third parties or external networks. These exclusions concern delivery outcomes; the policy separately describes a written request and review process.
Third-party processing, conversion, and bank fees are non-refundable under the provider’s policy. Check applicable charges and the service price before adding Account credits.
One-time SMS and rental numbers
Onlinesim offers one-time SMS reception alongside short-term and long-term phone rentals. The provider describes rental periods as several days or weeks, as well as short-term and long-term options.
Its API documentation says rental numbers can receive messages from multiple senders, except prohibited senders. Receiving messages from payment services, banks, and other financial institutions is unavailable.
Free numbers are intended for testing, but their quantity and country availability are limited. Messages received on those numbers are public and accessible to other site users. Treat that access condition as a material difference from the provider’s stated privacy claims for purchased numbers.
API keys, activations, and responses
API access is for registered Onlinesim users with an Onlinesim profile, and may be subject to API requirements and limits. The documentation lists API keys among the available authentication methods.
For a single-service activation, the provider states that the service cannot be changed during the activation. Its documentation describes a short time window, set at 15 minutes for most services. The same documentation states that the activation allows unlimited* SMS from one service within that window.
The provider’s API documentation says responses are provided in JSON or TXT, depending on the method and results. The provider says common API errors are returned with HTTP status 200, with the error code in the response field. The provider says requests may be limited by frequency or concurrency, and advises reducing request intensity and trying again later. The provider also says the error-code list may be extended, and unknown codes should be treated as generic errors and logged.
The API documentation lists the GNU General Public License, version 3.0. Check how the API’s response and error handling fit the intended integration before relying on it.
Questions for support before registering
Onlinesim says its support is available 24/7 through online support chat and email.
For a refund request, ask how to identify the transaction clearly. The provider requires an account identifier, a reason, and payment details sufficient to identify the transaction. It says sufficiently detailed requests are reviewed within 5 business days of receipt.
Ask which policy version governs the account. The provider states that only the English version of its policy has legal effect, while translations are for convenience. Refund requests must be submitted in writing to support, according to the refund policy.
Refunds and account rules narrow control
The provider excludes refunds for external-network outcomes, including non-delivery, delays, blocking, and rejection. Refunds are not automatic; the policy says requests are reviewed case by case. The provider may offer troubleshooting or alternatives when a request concerns inability to use Marketplace Services.
The policy permits the provider to require identification at any time, and says access may be suspended or terminated if identification is not completed. This leaves account access conditional on a requirement that may arise after registration.
An account is automatically deleted if no new purchase occurs within 30 days after the last activity, according to the marketplace terms. Remaining balances and prepaid amounts are forfeited and non-refundable upon automatic deletion. The refund policy likewise says balances remaining after deletion are non-refundable.
The policy may delay or refuse processing if requested information is missing. Third-party fees are also non-refundable. See “What we could not confirm” for the remaining setup gap.
Rental choices and documented access
The provider describes both single-use reception and rental formats, subject to availability and restrictions.
- One-time and rental options: buyers can choose the format that matches the intended use.
- SMS access: Marketplace Services include reading messages from available Active Numbers.
- API access: the provider says it may be available when API requirements and limits are met.
- Response formats: API documentation specifies JSON or TXT, depending on the method and results.
- Support channels: the provider lists online support chat and email support.
These are conditional features, not assurances about message delivery or uninterrupted access. Review the service restrictions and account terms before choosing a format.
Testing and lawful registration use
Onlinesim presents virtual numbers for testing, work, and data protection. The provider also describes registration use across messengers, social networks, and services.
Use is permitted only where lawful, and the provider assigns clients responsibility for determining legality. Offers involving gambling, betting, adult content, forex, binary options, or crypto may be restricted by law, age rules, or region. Check network, platform, and local-law requirements; this is not legal or financial advice.
Compare SMS access by delivery terms
In general, compare number access, sender-ID rules, per-message pricing, API behavior, delivery reports, compliance statements, and support terms. Ask how each provider defines failed delivery and handles associated charges.
What we could not confirm
- Integrations and setup requirements: the available pages do not describe them.
Questions on Onlinesim’s written terms
How do prepaid credits work?
The provider says clients prepay through payment methods available on the Platform, with prepaid amounts appearing as Account credits. Check the applicable service price and charges before adding credits.
Are messages on free numbers private?
No. The provider says messages received on free numbers are public and accessible to other site users. Free-number availability is limited by quantity and country, according to the API documentation. Do not use these numbers for messages that need to remain private.
Can numbers receive messages from financial services?
No. Onlinesim’s API documentation says receiving messages from payment services, banks, and other financial institutions is unavailable. This restriction applies to the service described in the documentation; confirm that the intended sender and use case are permitted before purchasing.
What happens after an account is inactive?
The marketplace terms say an account is automatically deleted if no new purchase occurs within 30 days after the last activity. The provider states that remaining balances and prepaid amounts are forfeited and non-refundable after automatic deletion.
How long does refund review take?
The provider says sufficiently detailed refund requests are reviewed within 5 business days of receipt. Refunds are not automatic and are assessed case by case. The review period does not change the exclusions for network delivery outcomes.
Proceed after resolving the operating terms
Fits if… support clarifies setup and integrations, refund handling for delivery failures, and identification requirements.
Probably not if… the workflow requires receiving messages from payment services, banks, or other financial institutions, which is unavailable.
Main risk… external-network delivery outcomes are excluded from refunds, while identification may affect account access. Trying the service is reasonable only if the first three questions receive clear answers. Read the English policy and confirm the account conditions before registering.
Sources
Every fact on this page traces back to a public page listed here, with the day it was read.
- onlinesim.info/documentation/offerchecked
- onlinesim.infochecked
- onlinesim.info/aboutchecked
- onlinesim.info/documentation/refundchecked
- onlinesim.info/openapi_docs/Onlinesim-API-UN/infochecked
- onlinesim.info/company_detailschecked
Notes on the making of this review
Editorial team of Payout Desk. This page rests on the public sources listed above, which Payout Desk checked on 2026-10-31. There was no hands-on testing. The page is updated when the sources change.
Last updated:
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