OneSimCard

What OneSimCard does

OneSimCard, operating under legal entity Belmont Telecom Inc., is a private Belmont, Massachusetts-based provider of international roaming SIM cards and travel eSIMs. The company was founded in 2006 and claims over 30 years of telecom experience; it sells prepaid, no-contract mobile connectivity for travelers across 200+ countries and regions through its own e-commerce site (onesimcard.com), iOS/Android apps, global physical shipping, brick-and-mortar retail partners, and a corporate accounts desk. Its product portfolio spans the DataMax eSIM (flagship reusable eSIM, 2024), DataMax Physical SIM, eSIM World, Universal Physical SIM, Expedition Physical SIM, and the regional eSIM Asiania, supported by the OneSim VoIP application, Personal Extra Numbers (PENs) in 50+ countries, an IoT Track SIM, and an M2M SIM line under iot.onesimcard.com.

The underlying platform aggregates multi-carrier roaming agreements and routes the device to the strongest available partner network per destination over 4G/LTE/5G. Reusable eSIM profiles — install once and reuse across trips — are the primary technical differentiator versus single-use eSIM resellers. Revenue is generated through one-time SIM/eSIM hardware sales (replacement SIMs at $29.96), zone- and country-based prepaid data packages ($1.20-$55.69 per plan depending on zone and volume), recurring Personal Extra Number subscriptions ($4.99-$59.95/year), VoIP airtime, minute/SMS buckets, and a $10 referral program.

Customer segments split between individual leisure and business travelers (long-tail consumer), digital nomads, regional Asia-Pacific travelers, and corporate accounts with volume pricing. The company also operates a thin IoT/M2M vertical under iot.onesimcard.com. Pricing is fully prepaid with no monthly fees, and differentiated payment rails include credit card, Verified-by-Visa/MasterCard SecureCode, and Bitcoin via the 1SIM Fund. No external funding rounds, acquisitions, or public financial disclosures are recorded in the source materials.

Name

OneSimCard

Legal name

Belmont Telecom Inc.

Website

https://onesimcard.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

11–50 employees

Short description

OneSimCard (Belmont Telecom Inc.) is a private Belmont, MA-based provider of prepaid international travel SIM cards and reusable eSIMs with coverage in 200+ countries, serving individual travelers, business travelers, digital nomads, corporate accounts, and IoT/M2M customers via direct e-commerce and apps.

Ownership category

akta.pro rank

Headquarters

HQ city

Belmont

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Infrastructure, Operations, Personnel, Technology or R&D, Marketing or Sales, Supply Chain

Revenue model

1. SIM and eSIM Card Sales: One-time purchase of physical SIM cards (starting at $29.96 for replacement/upgrade) or eSIM profiles. Physical SIM cards come in 3-in-1 format (mini, micro, nano).
2. Data Packages and Plans: Prepaid data packages purchased for specific travel durations and data volumes. Packages range from daily (1GB for $3.50-$4.50) to monthly plans (up to 20GB). Zone-based pricing for multi-country coverage.
3. Personal Extra Numbers (PENs): Optional additional phone numbers in 50+ countries for voice calls and SMS. Pricing varies by country and subscription period (1-12 months).
4. OneSim VoIP Service: VoIP calling and SMS through mobile app, offering reduced rates compared to traditional roaming. Free calls between OneSim VoIP users.
5. Airtime Recharge: Prepaid balance for voice calls, SMS, and pay-as-you-go data. Minimum recharge $25. Balance valid for 10 months after recharge.
6. Discount Voice and SMS Plans: Optional discount packages including Minute Buckets (200-900 minutes) and SMS plans (100 messages for $10).
7. Referral Program: $10 referral bonus for each friend referred who purchases new service ($5 for rentals). Referred friend receives 5% discount on initial order.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels6 records

Core offering

OneSimCard sells prepaid international SIM cards and eSIMs that give travelers affordable data, voice, and SMS service in 200+ countries, distributed via its own website and app stores. It complements the SIM products with add-on services such as Personal Extra Numbers (PENs), VoIP calling, and VPN, plus a Corporate Accounts program for business teams and M2M/IoT SIMs for connected devices.

Product overview

OneSimCard offers a comprehensive portfolio of international SIM and eSIM products for travelers with coverage in 200+ countries. The core product lineup includes DataMax eSIM (flagship reusable eSIM), DataMax Physical SIM, eSIM World, Universal Physical SIM, Expedition Physical SIM, and regional eSIM Asiania for Asia/Oceania. Supporting services include OneSim VoIP app for cost-effective calling over Wi-Fi, Personal Extra Numbers (PENs) in 50+ countries, IoT Track SIM for consumer tracking devices, M2M SIM for machine-to-machine communications, VPN service, and corporate account options. The company operates on a prepaid model with no contracts, providing data plans starting from $3.50, voice options via VoIP apps, and free incoming calls in 150+ countries.

Differentiator

Problem solved

Functional benefit

Brands

• DataMax eSIM: Reusable Forever eSIM for data-first travelers with multi-country 5G coverage and flexible add-on options for calling and messaging.
• DataMax Physical SIM
• eSIM World
• Universal Physical SIM
• Expedition Physical SIM
• eSIM Asiana
• OneSim VoIP
• 1SIM FUND
• IoT Track SIM

Products and services

• DataMax eSIM Reusable eSIM that provides unlimited data in the country of purchase plus refill/renewal options for additional data, targeted at travelers who need high-volume mobile data in a single country.
• DataMax Physical SIM Physical SIM card counterpart to the DataMax eSIM, providing unlimited data in the country of purchase with refill and renewal options for travelers who prefer a removable SIM.
• eSIM World Reusable eSIM with data coverage across multiple countries worldwide, designed for travelers moving across borders and needing a single eSIM for multi-country trips.
• Universal Physical SIM Single physical SIM card providing data, voice, and SMS across multiple countries for international travelers who want a removable SIM rather than an eSIM.
• Expedition Physical SIM Physical SIM card directed at extreme and expedition travelers, offering data, voice, and SMS coverage in remote and hard-to-reach destinations.
• eSIM Asiania Region-specific eSIM providing mobile data across Asia-Pacific destinations, aimed at travelers whose trips concentrate in Asia.
• IoT Track SIM SIM with data plan designed for tracking and IoT devices, providing mobile connectivity for asset tracking and telemetry applications.
• M2M SIM Card SIM card purpose-built for machine-to-machine (M2M) applications, providing data connectivity for industrial and commercial connected devices.
• Personal Extra Numbers (PENs) Subscription service that provides permanent or long-term personal phone numbers in 90+ countries, allowing users to be reached at a local-looking number when traveling.
• OneSim VoIP VoIP calling service accessed through the OneSim VoIP app, enabling low-cost international voice calls over data using a OneSimCard number.
• Corporate SIM Cards (Corporate Accounts) Corporate SIM program providing companies with volume pricing, centralized management, and shared credit for deploying SIMs/eSIMs to employees traveling internationally.
• VPN Service VPN service offered as a companion to OneSimCard SIMs and eSIMs to provide secure, private internet access while traveling internationally.
• Mobile Travel Accessories Retail accessories (chargers, adapters, phone cases, and other mobile travel accessories) sold alongside OneSimCard SIMs and eSIMs.

Quantifiable outcome

• 85% savings on calls, text and data compared to standard roaming rates
• +2 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature6 records

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Holafly: Holafly is a fast-growing eSIM provider focused on unlimited data plans for travelers across 160+ destinations. It competes directly with OneSimCard for the same travel eSIM buyer, with a stronger emphasis on unlimited data packages.
• Ubigi: Ubigi is a Transatel-owned eSIM provider offering global mobile data for travelers and connected devices. It competes with OneSimCard on multi-country eSIM data, including IoT connectivity — directly overlapping OneSimCard's data and M2M offerings.
• Knowroaming: Knowroaming offers international SIM cards and eSIMs for travelers with multi-country data coverage. It targets the same value-conscious traveler as OneSimCard with a comparable prepaid travel SIM proposition.
• Airalo: Airalo is the largest venture-backed travel eSIM marketplace, offering data plans in 200+ countries with a self-serve app-led GTM. It directly competes with OneSimCard across the same travel eSIM buyer, overlapping product set, and global coverage footprint.
• Telestial: Telestial is a global travel SIM provider offering prepaid international SIM cards for voice, text, and data. It is a direct comparator to OneSimCard's legacy physical SIM business for travelers.
• GigSky: GigSky is a long-standing eSIM data provider for international travelers and IoT/M2M devices. It is a direct peer to OneSimCard in both consumer travel eSIMs and IoT/M2M use cases.

Broad incumbents

• Google Fi: Google Fi is a major wireless carrier offering international data roaming as part of its core plan. While not a travel-SIM specialist, it competes with OneSimCard for travelers who choose to keep their home carrier for international use due to built-in roaming coverage.

Emerging players

• aloSIM: aloSIM is an eSIM data provider offering flexible travel data plans across many countries. It is a niche direct competitor to OneSimCard in the consumer travel eSIM segment, focused on affordability and simplicity.
• Truphone: Truphone historically offered international mobile SIM and eSIM services for travelers and enterprises. Following restructuring, it operates in a narrower segment but remains a comparable international connectivity provider with similar enterprise and IoT emphasis.
• Nomad (eSIM): Nomad is a newer eSIM travel data provider covering 100+ countries with a mobile-first app experience. It is an emerging competitor targeting younger travelers and digital nomads, overlapping with OneSimCard's digital nomad segment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/OneSimCard
• Facebookfacebook.com/OneSimCard
• LinkedInlinkedin.com/company/onesimcard

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about OneSimCard