Software Alternatives & Startups

FFSIM VS GlowSMS

Compare FFSIM VS GlowSMS and see what are their differences

FFSIM

Get Global Virtual Phone Numbers for SMS Verification with Non-VoIP and VoIP Options. Best temporary phone number service.

Rating
0 reviews
Pricing
Paid Free trial $0.02 / Monthly (.20)
GlowSMS

Temporary non-VoIP phone numbers for receiving SMS and OTP verification codes online, with activations lasting up to 20 minutes across 180+ countries and 500+ supported services.

Rating
0 reviews
Pricing
Paid

Which is more popular?

Utilities popularity
100% vs 0%
alternatives listed
16 vs 42

Base details

Website, pricing, platforms and company facts side by side.

FFSIM
GlowSMS
Website ffsim.com glowsms.com
Pricing
Paid Free trial $0.02 / Monthly (.20) Official pricing
Paid
Platforms
Web
Web
Company Startup from the United States · 2026 2026
Listed in

About FFSIM and GlowSMS

In their own words, as submitted to SaaSHub.

FFSIM
GlowSMS

FFSIM – Global Virtual Phone Numbers for SMS Verification FFSIM is an online platform providing Non-VoIP and VoIP virtual phone numbers for SMS verification across multiple countries. It offers an affordable and convenient solution for online registrations, OTP verification, and supported digital...

Read more about FFSIM

GlowSMS is an online SMS verification platform for receiving one-time passwords (OTP) and verification codes with temporary non-VoIP phone numbers. Numbers are available across 180+ countries and 500+ supported apps and online services, with each activation available for up to 20 minutes. Users...

Read more about GlowSMS

Features and specs

What each product offers, as listed by its team.

FFSIM 8 features
GlowSMS 6 features
  • Non-VoIP Numbers
    Real Non-VoIP virtual phone numbers for SMS verification.
  • VoIP Numbers
    Access VoIP numbers for supported SMS verification services.
  • Same Number Renewal
    Renew the same previously purchased phone number multiple times.
  • Instant SMS Delivery
    Receive OTP and verification messages online.
  • Pay only for success
    Pay only when a successful verification meets the service conditions.
  • Affordable Pricing
    Competitive pricing for different countries and number types.
  • Multiple Services
    Supports over 1,435 services and platforms.
  • User-Friendly Dashboard
    Easily manage numbers, purchases, and SMS verification.
  • Up to 20-Minute Temporary Numbers
    Temporary non-VoIP numbers for SMS and OTP verification, active for up to 20 minutes per order.
  • Multiple SMS & Resends
    Receive verification-code resends during the 20-minute activation window, with new SMS automatically appearing in the dashboard.
  • Global Coverage
    Choose temporary numbers across 180+ countries for 500+ supported apps and online services.
  • Live Availability & Pricing
    Check current country, service, stock, and pricing before placing an order.
  • Balance Refund if No SMS
    Eligible no-SMS orders can be cancelled, with the order amount returned to the GlowSMS account balance.
  • REST API
    Public REST API for service and offer discovery, ordering numbers, retrieving OTP codes, and checking order status.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
FFSIM
GlowSMS
100% 100%
0% 0%
0% 0%
100% 100%
100% 100%
0% 0%
0% 0%
100% 100%

Questions & Answers

As answered by people managing FFSIM and GlowSMS.

Which are the primary technologies used for building your product?

FFSIM's answer

FFSIM is built as a web-based platform featuring automated SMS verification workflows, real-time message delivery, number management, and an integrated payment system. Its platform includes automated number allocation, SMS monitoring, user account management, and repeat number renewal functionality. These technologies work together to provide users with a convenient and streamlined verification experience.

GlowSMS's answer:

Web application, real-time SMS dashboard, and REST API.

What's the story behind your product?

FFSIM's answer

FFSIM was created to make online SMS verification simpler, more accessible, and affordable. The platform focuses on solving common problems with temporary phone number services, including limited number availability, unreliable SMS delivery, and the inconvenience of repeatedly purchasing new numbers. FFSIM introduced a repeat number renewal solution that allows users to keep using the same physical SIM number for supported services. Its mission is to provide convenient, reliable, and affordable virtual phone number solutions worldwide.

GlowSMS's answer:

GlowSMS was created to make SMS verification simpler and more transparent. Temporary-number services can involve unclear pricing, changing availability, slow code delivery, and complicated refund processes. GlowSMS was built around a simpler workflow: show current options and prices, let users choose a service and country, deliver incoming SMS through a real-time dashboard, and provide a clear path for eligible no-SMS orders. The goal is to make short-term phone verification straightforward for both individuals and businesses.

How would you describe the primary audience of your product?

FFSIM's answer

FFSIM is designed for individuals, developers, software testers, digital professionals, and businesses that need virtual phone numbers for legitimate SMS verification and testing purposes. It is particularly useful for users who need Non-VoIP numbers, international phone number options, repeated verification access, and affordable SMS verification solutions.

GlowSMS's answer:

GlowSMS is primarily for individuals, teams, businesses, and developers that need temporary phone numbers to receive SMS or OTP verification codes for supported apps and websites without using a personal phone number. It is best suited to short-term verification workflows and temporary access to phone numbers.

Why should a person choose your product over its competitors?

FFSIM's answer

FFSIM offers several advantages, including real Non-VoIP physical SIM numbers, repeat number renewal, competitive pricing, and automated SMS delivery. Users can renew their existing numbers instead of purchasing new ones whenever renewal is supported. FFSIM also follows a pay-only-for-success policy, meaning users are not charged when a verification code is not received. Its simple dashboard and wide range of supported services make SMS verification convenient.

GlowSMS's answer:

GlowSMS is designed for users who want straightforward, short-term SMS verification rather than long-term phone-number rental. Users can check current availability and pricing before ordering, receive verification-code resends during the active window, and get the order amount returned to their GlowSMS balance when an eligible order receives no SMS. Both web-based ordering and a REST API are available.

What makes your product unique?

FFSIM's answer

FFSIM stands out with its Repeat Number Renewal feature, allowing users to keep and renew the exact same physical SIM phone number multiple times for ongoing SMS verification. Unlike typical temporary number services, FFSIM offers real Non-VoIP numbers, global coverage across multiple countries, instant SMS delivery, and a pay-only-for-success pricing model. Users also benefit from an easy-to-use dashboard, competitive pricing, and access to over 1,435 supported services.

GlowSMS's answer:

GlowSMS combines temporary non-VoIP phone numbers, up-to-20-minute activations, verification-code resends, live availability and pricing, and coverage across 180+ countries and 500+ supported services. Eligible orders that receive no SMS can be cancelled for a refund to the GlowSMS account balance, and a REST API is available for automated workflows.

Who are some of the biggest customers of your product?

FFSIM's answer

FFSIM serves a diverse international user base, including:

  • Individual users looking for virtual phone numbers for SMS verification.
  • Software developers and application testers.
  • Digital professionals and online entrepreneurs.
  • Businesses requiring SMS verification solutions.
  • Users who need repeat number renewal for supported services.

FFSIM currently serves over 1,700 users through its online platform.

User comments

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Alternatives to FFSIM and GlowSMS

When comparing FFSIM and GlowSMS, you can also consider the following products.

  • SMS-man.com

    SMS-man offers a virtual numbers to receive SMS and create multiple accounts on WhatsApp, Telegram, Instagram, Twitter, Amazon and others. The SMS-man service provides numbers of such countries as China, US, India, Russia, UK, Germany, Ukraine etc.

    Compare SMS-man.com to FFSIM or GlowSMS:

  • HeroSMS

    Receive SMS online to virtual numbers — use directly on site or via API to register accounts of any service and application, receive profits and discounts

    Compare HeroSMS to FFSIM or GlowSMS:

  • flo-voice1.com

    Instantly rent a phone number to receive SMS verification codes for popular services. Earn 80% commission as a partner.

    Compare flo-voice1.com to FFSIM or GlowSMS:

  • SMSCodex

    SMS verification API and virtual numbers worldwide

    Compare SMSCodex to FFSIM or GlowSMS:

  • Legitsms

    LegitSMS provides premium non-VoIP numbers for guaranteed SMS verification. Bypass VoIP blocks and verify accounts on strict platforms like Google, WhatsApp, and Tinder with real cellular numbers.

    Compare Legitsms to FFSIM or GlowSMS:

  • Smspva

    The best SMS activation site! Operating since 2013. Payment by card. 60+ countries numbers. Purchase without registration!

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