Verifying online accounts with a personal phone number is a privacy risk. Whether you are a developer automating QA signups, a growth team managing multiple business profiles, or a privacy-conscious user, you need a virtual number to receive SMS verification (OTP) codes. But choosing the right provider is difficult when pricing is opaque, success rates vary wildly, and API documentation is often incomplete.
This buyer's guide compares three of the most popular virtual number services in 2026: 5sim, SMS-Activate, and OnlineSim. We break down their pricing structures, country coverage, supported services, API quality, refund policies, and success-rate reputation so you can make an informed decision.
Virtual Number Services: What You Need to Know in 2026
A virtual SMS number lets you receive one-time passwords without exposing your real SIM card. These services source large pools of numbers from telecom providers worldwide. When you request a number for a specific app—like Telegram, WhatsApp, or Gmail—the service allocates a number, forwards the incoming SMS to your dashboard, and releases the number afterward.
Before comparing providers, understand the two core product types available across the market:
- One-time SMS activations: A single-use number that receives exactly one code for one service. Cheap and disposable.
- Number rentals: A number held for a set period (from hours to days) that can receive multiple messages across different services.
According to the FTC's identity theft tracking data, phone-based identity theft remains a significant threat, which is why keeping your real number off public platforms matters. Similarly, the UK's NCSC recommends minimizing where you share your mobile number to reduce SIM-swap and phishing risks.
At-a-Glance Comparison
Here is a high-level look at how 5sim, SMS-Activate, and OnlineSim stack up against each other, alongside NumsGo as an alternative that leverages the 5sim network infrastructure.
| Feature | 5sim | SMS-Activate | OnlineSim | NumsGo |
|---|---|---|---|---|
| Country Coverage | 180+ countries | 190+ countries | 150+ countries | 150+ countries |
| Supported Services | 1000+ apps | 800+ apps | 500+ apps | 1000+ apps |
| Payment Methods | Crypto, cards, e-wallets | Crypto, cards, e-wallets | Crypto, cards | Crypto (BTC, ETH, USDT, SOL, LTC) |
| API Quality | Well-documented, reliable | Documented, older design | Documented, functional | REST API (docs.numsgo.com) |
| Refund Policy | Auto-refund on failure | Auto-refund on failure | Auto-refund on failure | Auto-refund on failure |
| Minimum Top-Up | ~$1 equivalent | ~$0.50 equivalent | ~$5 equivalent | No strict minimum (crypto network fees apply) |
Pricing Differences
Pricing for virtual numbers is dynamic. The cost depends on the country, the target service, and current demand. A number for Gmail in the United States will cost significantly more than a number for the same service in Indonesia.
5sim Pricing
5sim uses a real-time market model. Prices for one-time activations typically range from $0.01 to $10 depending on the service and country rarity. Popular services in tier-1 countries (US, UK, Germany) sit around $0.50 to $5. 5sim charges a small commission on top of the base price. Number rentals are available for 1 day to 30 days, with prices scaling accordingly.
SMS-Activate Pricing
SMS-Activate operates on a similar dynamic model. One-time activations range from $0.04 to $20. It tends to have a lower floor price for common services in less-demanded countries. Rentals are available from 1 hour up to 4 weeks. The minimum top-up is lower than most competitors, making it accessible for users who want to test the platform with minimal commitment.
OnlineSim Pricing
OnlineSim positions itself as a premium service. Single activations generally range from $0.10 to $15. While the base prices are sometimes higher, users report that the premium pricing correlates with higher success rates for specific high-demand services. Rentals are available from 1 day to 30 days.
NumsGo Pricing
NumsGo sources its numbers via the 5sim network, meaning it shares the same extensive pool and competitive base pricing. Users top up a USD wallet using cryptocurrency (BTC, ETH, USDT, SOL, or LTC), then spend per number. If a number fails to receive its code within the activation window, NumsGo provides an automatic refund to the wallet—no support ticket required. Credit and debit card support is currently in development.
Country Coverage and Supported Services
The utility of a virtual number service depends entirely on whether it has numbers for the countries and platforms you need.
Country Availability
SMS-Activate leads with 190+ countries, followed by 5sim with 180+, and OnlineSim with 150+. NumsGo provides coverage across 150+ countries. For most users, the difference between 150 and 190 countries is marginal—it only matters if you need a number from a specific smaller nation. All four services cover major markets like the US, UK, EU states, India, and Brazil.
One important factor: some platforms (like WhatsApp or certain banking apps) block numbers from known VoIP ranges. 5sim and SMS-Activate have larger pools that sometimes include non-VoIP ranges, which can improve success rates for these restrictive services.
Supported Platforms
5sim supports over 1,000 services, making it the broadest option. SMS-Activate supports around 800 services, while OnlineSim focuses on roughly 500 of the most popular apps. NumsGo matches 5sim's breadth with 1,000+ supported services, including Telegram, WhatsApp, Discord, Gmail, and major social and marketplace platforms.
API Quality and Developer Experience
For developers automating signups, QA testing, or bulk verification, the API is the most critical factor.
5sim API
5sim offers a robust REST API with comprehensive documentation. It supports ordering numbers, checking balances, polling for incoming SMS, and canceling orders. The API is stable, with reported latencies under 200ms for standard requests. Webhooks are available for real-time code delivery, reducing the need for constant polling.
SMS-Activate API
SMS-Activate provides a functional API, but the documentation feels dated. The endpoint structure uses older conventions, and error messages can be cryptic. Despite the rough edges, it is widely used in the automation community, and you can find numerous community-written wrappers on GitHub. Average response times are around 300ms.
OnlineSim API
OnlineSim's API is documented and functional, with a cleaner design than SMS-Activate. However, community feedback suggests that rate limits can be restrictive for high-volume users. If you are running 100+ concurrent sessions, you may hit throttling limits that do not affect other providers.
NumsGo API
NumsGo provides a modern REST API designed for developers who want to automate ordering numbers and retrieving codes. Full documentation is available at docs.numsgo.com. Because NumsGo uses the 5sim network infrastructure, it benefits from similar reliability and pool depth while offering a streamlined developer interface.
Refund Policies and Success Rates
Even the best virtual number services fail to receive codes sometimes. Numbers get recycled, platforms block known ranges, and messages arrive late. How a provider handles these failures matters.
Refund Policies
All three major providers—5sim, SMS-Activate, and OnlineSim—offer automatic refunds if a number fails to receive an SMS within the designated activation window. The key difference is the window length and the ease of the refund process:
- 5sim: Auto-refund after 20 minutes of no message. Refunds go to the user's balance immediately.
- SMS-Activate: Auto-refund after 10 to 20 minutes depending on the service. Users can also manually cancel orders before the code arrives.
- OnlineSim: Auto-refund after 10 to 30 minutes depending on the service tier. Premium numbers have longer windows.
- NumsGo: Auto-refund to the USD wallet if the code is not received within the activation window—no manual action or support ticket required.
Success Rate Reputation
Success rates are not published by any provider and vary by country, service, and time of day. However, community consensus from forums and review sites suggests:
- 5sim has a strong success rate for most services, estimated at 85-90% for standard activations. It struggles with highly restrictive platforms like certain banking apps.
- SMS-Activate offers comparable success rates on popular services but can dip for less-demanded countries where number pools are smaller.
- OnlineSim positions itself as having higher success rates for premium services, with estimates around 90-95% for its premium tier, though at a higher price point.
- NumsGo shares the 5sim network's success rates, benefiting from the same large pool of available numbers.
Who Each Service Is Best For
5sim: Best for Broad Coverage and Developers
5sim is the strongest all-rounder. With 180+ countries, 1,000+ services, and a well-documented API, it works for developers, QA teams, and businesses that need reliable coverage across many regions. The pricing is competitive, and the API is stable enough for production automation.
SMS-Activate: Best for Low-Cost Experimentation
SMS-Activate's low minimum top-up (around $0.50) makes it the best option for users who want to try virtual numbers without a significant financial commitment. It is also the oldest service in this comparison, meaning it has a large community and many unofficial integrations. However, the dated API and occasionally inconsistent pool quality make it less ideal for mission-critical automation.
OnlineSim: Best for High-Demand Services
OnlineSim targets users who prioritize success rates over cost. If you need to verify accounts on platforms that aggressively block VoIP numbers (like certain messaging or financial apps), OnlineSim's premium tier may justify the higher price. It is less suited for high-volume, cost-sensitive workflows.
NumsGo: Best for Privacy-Focused Users and Streamlined Workflows
NumsGo is ideal for users who want the breadth of the 5sim network with a cleaner, more focused experience. It supports 150+ countries and 1,000+ services, offers both one-time activations and number rentals, and provides automatic refunds without the need to contact support. The crypto-only payment model appeals to privacy-conscious users. For developers, the REST API at docs.numsgo.com makes integration straightforward. You can explore options for one-time codes at /sms-verification or longer-term needs at /number-rental.
Key Takeaways
Choose based on your priorities:
- Need the broadest country coverage and a solid API? 5sim or NumsGo (which uses the 5sim network) are your best bets.
- Want the lowest barrier to entry with tiny top-ups? SMS-Activate lets you start for under $1.
- Prioritizing success rates for restrictive platforms? OnlineSim's premium tier may be worth the cost.
- Prefer crypto payments and automatic refunds? NumsGo offers both with no manual intervention.
- All four services auto-refund failed activations—check the window length for your specific service.
Frequently Asked Questions
Is it legal to use virtual numbers for SMS verification?
Yes, using virtual numbers to receive SMS verification codes is legal in most jurisdictions. However, you must comply with the terms of service of the platform you are verifying. Creating fraudulent accounts or impersonating others is prohibited. Legitimate use cases include protecting your privacy, QA testing your own applications, and managing business accounts.
Why do some platforms reject virtual numbers?
Certain platforms maintain databases of known VoIP and virtual number ranges. When they detect a number from these ranges, they block the verification attempt. Services with larger number pools—like 5sim and NumsGo—have a better chance of providing a number outside these blocked ranges, though no service can guarantee 100% success on every platform.
What happens if I do not receive the SMS code?
If a virtual number fails to receive the SMS code within the activation window, all four services discussed here will automatically refund the cost to your account balance. NumsGo, for example, auto-refunds to your USD wallet with no manual action required. You can then try again with a new number.
What is the difference between a one-time activation and a number rental?
A one-time activation provides a number for a single SMS from one specific service. Once the code is received (or the window expires), the number is released. A number rental gives you exclusive access to a number for a set period—ranging from hours to days—allowing it to receive multiple messages from multiple services. Rentals are useful when you need to verify several services on one number or expect multiple codes over time.
Can I use these services without a credit card?
Yes. All four services accept cryptocurrency payments. NumsGo currently accepts BTC, ETH, USDT, SOL, and LTC, making it fully accessible without a credit card. 5sim and SMS-Activate also accept various e-wallets and cards. OnlineSim accepts cards and crypto. If you prioritize privacy, crypto payments are the most anonymous option.