The line between telecom and the businesses that sell connectivity is dissolving. The number of devices using eSIMs is forecast to grow 30% in 2026, rising from 1.2 billion in 2025, according to Juniper Research, though that growth is led primarily by enterprise IoT use cases rather than consumer travel handsets. On the consumer side, travel eSIM revenue reached $1.8 billion in 2025, growing 85% from $989 million in 2024, according to the same research firm, and a growing share of that growth is being captured not by mobile network operators directly, but by travel platforms, fintechs, and digital wallets embedding connectivity into products that were never telecom products to begin with. Revolut and N26 illustrate how far that shift now extends beyond travel-native companies into core financial services: Revolut's travel eSIM launched in 2024 and expanded into full mobile plans in 2025, while N26 announced its own eSIM-based mobile plan, N26 SIM, in May 2025.

The harder question for any business evaluating eSIM as a B2B platform decision is not whether to add connectivity. It is which model fits the business. An eSIM B2B platform is not a single product category; it spans white label storefronts, direct API integrations, and full wholesale reseller programs, each suited to a different combination of engineering capacity, customer relationship, and commercial ambition. Choosing the wrong model wastes either engineering time on infrastructure that did not need to be built, or revenue on margin given away to an affiliate model that should have been a reseller relationship.

This article gives OTAs, digital wallets, and resellers a decision framework for choosing the right eSIM B2B platform model, rather than treating connectivity as a single undifferentiated product to bolt on. It also serves as the central reference point for the three model-specific articles in this series: White Label eSIM, eSIM API Provider, and eSIM Reseller each go deeper into one of the three models covered here.

Monty Mobile's eSIM Reseller Portal, eSIM Consumer Platform, and eSIM Entitlement Server cover the full range of B2B deployment models on a single carrier-grade infrastructure base.

How an eSIM Platform Works at Deployment Scale, Across Every B2B Model

Every eSIM B2B platform model sits on the same underlying infrastructure: the GSMA's Remote SIM Provisioning (RSP) architecture defined under SGP.22, which governs how operator profiles are prepared, delivered, and managed on a device without a physical SIM swap. What differs between B2B platform models is not the underlying telecom mechanics but the layer of abstraction a partner interacts with, and how much engineering and brand investment that partner is willing to make.

At one end of the spectrum sits a hosted white label storefront, which requires minimal engineering effort and launches fastest, but limits customization to what the provider's templates support. At the other end sits a direct API integration, which gives a partner complete control over the order, provisioning, and activation experience embedded inside an existing product, but requires dedicated engineering resources to build and maintain. In between sits a wholesale reseller relationship, which focuses primarily on margin and catalog control rather than deep technical customization, often paired with either a hosted storefront or a lighter integration layer.

Non-telecom companies embedding connectivity directly into their own products is no longer a fringe experiment; eSIMs are increasingly becoming part of broader ecosystems that combine payments, identity, and mobility, rather than standing alone as a connectivity feature, as Telecoms.com observed in its review of how 2025 reshaped the eSIM landscape. The practical effect for a travel platform, fintech, or wallet is that owning the connectivity layer, rather than just linking out to it, has become a real lever for customer retention and differentiation across fintech, travel, and consumer technology.

Coverage availability, delivery rates, and service features may vary by country and are subject to local operator agreements, regulatory requirements, and network conditions. Contact Monty Mobile for specific market capabilities.

OTAs: Matching the Platform Model to Booking Flow Complexity

The right eSIM B2B platform model for an OTA depends heavily on how deeply connectivity needs to integrate into the existing booking flow, and how much engineering capacity the OTA has available to build that integration.

When a hosted storefront fits

A smaller OTA or one without dedicated engineering resources is often better served by a hosted white label storefront linked from the booking confirmation page or a post-booking email, rather than a deep API integration. This captures incremental reseller margin with almost no engineering cost, even though the customer technically leaves the OTA's primary interface briefly to complete the eSIM purchase.

When an API integration is worth the investment

A larger OTA processing meaningful transaction volume, where keeping the customer inside a single checkout flow measurably improves conversion, justifies the engineering investment of a direct API integration. The decision threshold is usually a function of booking volume: at low volume, the incremental conversion lift from an embedded flow does not offset the integration cost; at higher volume, it does.

When a reseller-only relationship makes sense

An OTA primarily interested in reseller margin without any interest in controlling the technical integration layer can operate purely as a wholesale reseller, using the provider's existing storefront or app experience with minimal customization. This suits OTAs treating connectivity as a secondary revenue line rather than a core product feature.

For travel and transportation businesses evaluating which connectivity model fits their booking infrastructure, see Monty Mobile's Transportation solutions.

Digital Wallets and Fintechs: Connectivity as Part of a Broader Embedded Strategy

Digital wallets and fintechs face a different version of the same decision, because connectivity is rarely a standalone product for these platforms; it sits alongside existing financial services inside the same customer relationship. Mobile connectivity bundling among neobanks and challenger banks is increasingly framed around churn reduction, since high-frequency connectivity engagement reinforces a customer relationship that banking interactions alone do not sustain at the same frequency. Revolut and N26 are the clearest examples: both moved well beyond a simple eSIM add-on, building deep account-level integration as part of a broader push toward digital lifestyle platforms.

API-native integration for premium tier features

For a wallet offering eSIM data as a premium account benefit, a direct API integration is almost always the right model, because the entitlement logic (allocating data per billing cycle, tracking consumption, triggering top-up prompts) needs to live inside the wallet's own account and billing infrastructure rather than a separate hosted storefront.

Reseller margin as a standalone revenue model

A wallet without the engineering capacity for deep API integration, or one testing market appetite before committing engineering resources, can launch as a reseller using a hosted storefront linked from within the app. This validates demand before justifying a deeper technical investment.

Full embedded telco partnership for ecosystem plays

A full embedded telco partnership allows a fintech to own the entire user interface and customer relationship, while the connectivity provider manages the underlying telecom backend entirely, a model increasingly common among digital-first banks and wallets that want connectivity to feel like a native feature of the app rather than a third-party add-on.

Regulatory note: Digital wallet and fintech platforms must evaluate whether their chosen eSIM B2B model constitutes a telecommunications resale activity under local law, independent of any existing financial services license, and confirm data handling practices align with applicable financial services regulations in each market.

For financial services platforms evaluating connectivity as part of a broader engagement strategy, see Monty Mobile's Finance industry solutions.

Resellers: Choosing Between Wholesale-Only and Full Platform Control

A pure-play reseller's choice of B2B platform model is largely a function of ambition and resource availability rather than booking flow complexity, since there is no existing core product the connectivity needs to integrate into.

Wholesale-only for fast market entry

A reseller prioritizing speed to market over deep customization typically starts with a wholesale-only relationship paired with a hosted storefront, since this combination requires the least operational and technical investment before generating revenue.

Full API control for long-term product ambition

A reseller planning to build a defensible, branded connectivity business over multiple years typically migrates toward a direct API integration once initial wholesale volume justifies the engineering investment, since full API control over the customer experience becomes the basis for genuine brand differentiation rather than reselling a generic storefront experience.

Sub-distribution as a platform extension

A reseller operating at scale can extend its own wholesale relationship to smaller sub-distributors, effectively becoming a B2B platform itself for partners who lack the volume to negotiate wholesale terms directly. This layer of the market increasingly resembles the embedded telco model applied one level down the distribution chain.

For wholesale eSIM program and reseller infrastructure details, see Monty Mobile's eSIM Reseller Portal.

Deployment Example: Fintech Migrates From Reseller Storefront to Embedded API Integration

A regional digital wallet serving customers across the Gulf Cooperation Council launched its first eSIM offering as a wholesale reseller using a hosted storefront linked from a banner inside the app. The goal was to validate customer demand for connectivity as an app feature before committing engineering resources to a deeper integration.

Over an eight-month period, the hosted storefront generated consistent but modest engagement, with roughly 4% of monthly active users clicking through to the storefront and a conversion rate on that traffic of approximately 18%. The product team determined that demand was real but that the friction of leaving the app to complete a purchase was suppressing conversion meaningfully below what an embedded experience could achieve.

The wallet then committed engineering resources to a direct API integration, embedding eSIM purchase and activation directly into the wallet's existing premium account tier flow, with OAuth2-based authentication and webhook-driven activation tracking. Following the migration, click-through to the connectivity feature rose to roughly 11% of monthly active users, and conversion on that traffic improved to approximately 34%, reflecting the removal of the app-exit step entirely. Total eSIM-attributable revenue increased by a factor of nearly five within the first quarter after the embedded integration went live, compared with the prior reseller-storefront baseline.

Note: This is an anonymized deployment scenario based on typical implementation outcomes. Specific results vary by implementation, audience quality, and market conditions.

Compliance Considerations Across eSIM B2B Platform Models

Compliance obligations vary somewhat by which B2B platform model a partner chooses, but several requirements apply across all models.

Monty Mobile's infrastructure is built on GSMA-certified provisioning systems across all platform models, and the partner team supports each model's specific compliance and integration requirements.

Getting Started: Choosing and Deploying an eSIM B2B Platform Model

1. eSIM RSP API access.   Regardless of which model a partner ultimately chooses, Monty Mobile provisions API credentials and sandbox access upfront, so the option to move from a hosted storefront to a direct integration later does not require renegotiating infrastructure access.
2. Coverage and plan configuration.   Partners configure destination coverage, bundle types, and pricing through the reseller portal, independent of which front-end model they select, since the underlying catalog configuration is shared across deployment models.
3. Checkout or app integration.   Partners select their platform model based on engineering capacity and product ambition: a hosted storefront for fast, low-investment launch; a direct API integration for embedded, high-conversion experiences; or a wholesale-only reseller relationship for partners prioritizing margin over technical customization.
4. Provisioning and support setup.   Provisioning automation and partner support scale with the chosen model. Hosted storefront partners receive turnkey support; API integration partners receive technical escalation channels and sandbox testing support; reseller partners receive dashboard-based margin and volume tracking regardless of integration depth.

White label storefronts and direct API integration represent two ends of the same platform decision covered in this article. For storefront-specific detail, see also: White Label eSIM: How OTAs, Resellers, and Digital Wallets Launch Branded Connectivity (montymobile.com/blog/white-label-esim-platform-otas-resellers). For API integration detail, see also: eSIM API Provider: Embedding Connectivity Into OTA and Fintech Booking Flows (montymobile.com/blog/esim-api-provider-ota-fintech-integration). For wholesale margin and reseller structure, see also: eSIM Reseller: Building a Connectivity Business on Wholesale Infrastructure (montymobile.com/blog/esim-reseller-program-wholesale-margin).

Contact Monty Mobile through the partner inquiry page to discuss which eSIM B2B platform model fits your business.

About the Author

Daniel Dib is Senior Brand Manager at Monty Mobile, a global telecom solutions provider with 25+ years of MNO relationships across 120+ countries. He leads go-to-market strategy across Monty Mobile's CPaaS, Travel eSIM, and A2P Wholesale SMS product lines, and built this decision framework from direct conversations with OTAs, fintechs, and resellers evaluating which connectivity model fits their business.

Frequently Asked Questions

What is an eSIM B2B platform?

An eSIM B2B platform refers to the range of commercial and technical models through which a business can offer eSIM connectivity to its customers, spanning hosted white label storefronts, direct API integrations, and wholesale reseller relationships, all built on the same underlying telecom infrastructure.

How do I choose between a hosted storefront and a direct API integration?

The decision depends primarily on engineering capacity and the conversion impact of keeping customers inside an existing app or booking flow. Lower transaction volume or limited engineering resources typically favor a hosted storefront. Higher volume, where an embedded experience measurably improves conversion, typically justifies the engineering investment of a direct API integration.

Can a business start with one eSIM B2B model and migrate to another later?

Yes. Many partners begin with a hosted storefront to validate demand with minimal engineering investment, then migrate to a direct API integration once volume and conversion data justify the additional engineering work. The underlying infrastructure and catalog configuration typically remain consistent across this migration.

What compliance obligations apply across different eSIM B2B platform models?

All models require the underlying infrastructure to be GSMA SGP.22 compliant. Reseller and wholesale models may trigger additional telecommunications licensing requirements depending on jurisdiction. Direct API integrations require partners to implement standard API security practices, including OAuth2 authentication and signed webhooks. GDPR applies to any model processing data from EU or EEA customers.