A travel eSIM shared data plan sounds like a solved problem in 2026. It is not. The travel eSIM market is valued at roughly $1.75 billion this year, and over half of eSIM users first activated one specifically for travel. Despite that growth, shared data remains one of the least-developed features in the category. Most providers built their products for solo travellers. Families and couples were an afterthought.

You book the flights, sort the accommodation, pack the bags. Then on day three in Bangkok, your teenager burns through their allowance while yours still shows 6 GB untouched. That leftover data does not transfer. You watch them hunt for café Wi-Fi while you scroll at full speed. Frustrating, and completely avoidable if you choose the right plan from the start.

This article cuts through the marketing and tells you exactly which brands support shared data, how each one works in practice, and what to check before you buy.

Airalo is the largest eSIM marketplace by volume and the most frequently recommended option on travel forums. For solo travellers, it works well. For families, the picture is more complicated.

Airalo does not offer a dedicated travel eSIM shared data plan. Each traveller needs their own eSIM and their own plan. You can buy multiple plans under one account, which helps with organisation, but the data pools are entirely separate. If your partner burns through their allowance on day two in Tokyo, there is no mechanism to transfer your own unused gigabytes directly to them.

The workaround most Airalo users rely on is a personal hotspot: one person activates their eSIM, the rest of the group tethers to it. This technically works, but it also drains one device's battery, creates a single point of failure for the whole group's connectivity, and is explicitly restricted or throttled on certain Airalo plan types depending on the local operator. You need to read the plan details carefully before assuming hotspot is permitted.

For occasional travel with two people, the hotspot workaround is tolerable. For a family of four across a two-week trip, it becomes a daily negotiation over whose phone everyone is leeching from.

Holafly markets heavily on unlimited data, which sounds ideal for families: no one runs out, no arguments about who used more. The reality requires a closer look.

Like Airalo, Holafly has no dedicated travel eSIM shared data plan feature. There is no way to transfer data from one person's account to another. The workaround, again, is hotspot tethering. On most Holafly destinations, even that is restricted. Where hotspot is available, Holafly caps it at 1 GB, a hard ceiling that runs out quickly when multiple people share a single connection.

Holafly also applies speed throttling after a daily data threshold. They do not clearly communicate what that threshold is or at what speed your connection drops. You may be "unlimited" in name while loading a map at a speed that's barely functional.

For families looking for a genuinely shareable plan, Holafly's current product architecture does not serve that need reliably.

No brand advertises this loudly: on most travel eSIM plans, "data sharing" means one person turns on their hotspot and everyone else connects to it. That is not a shared plan. That is a workaround.

A real shared data plan lets multiple devices draw from a single pool, each with its own connection. No brand in the consumer travel eSIM market currently offers this the way traditional carriers do with family plans. Knowing that, the question shifts to which brand gives you the most flexibility when someone inevitably runs out.

Kolet Standard Plans give you a fixed gigabyte allowance, no throttling, and full speed until the very last megabyte. The key difference for group travel: you can transfer part of your data directly to another person's account via the app. Your teenager runs out in Bangkok; you send them a portion of your remaining balance. No hotspot required, no battery sacrifice, no single point of failure for the group.

Standard Plans are available across 190 countries, starting from €3.99 for 1 GB in Europe, with options up to 20 GB. Validity runs 30 days from first use, and data does not start counting until you actually use the first megabyte. If you have leftover data at the end of the trip, it converts to Koins rather than disappearing. 1 EUR equals 100 Koins, and those Koins roll forward to your next trip.

One thing worth being upfront about: Kolet also offers Unlimited Plans, billed by the day rather than by gigabyte. These are great for heavy users who want predictable daily billing. However, Unlimited Plans do not support data sharing or mid-trip top-ups, and unused days do not convert to Koins. If sharing data across your group is the priority, Standard Plans are the right choice.

Kolet is also transparent about what "unlimited" actually means: 5 GB per 24-hour window at full speed, then reduced speed until the window resets. This speed still supports messaging, maps, and email. Most competitors apply similar caps without disclosing them clearly. Kolet states it openly.

Two more things that matter if you travel frequently. First, all Kolet data plans earn 10 Flying Blue Miles per euro spent, but only if you link your Flying Blue account in the app before purchase. Miles are not credited retroactively. Second, Kolet is the only major travel eSIM brand with B Corp certification, scored 99.7 out of 200 and awarded in January 2026. Airalo, Holafly, and Saily are not certified.

Before purchasing any travel eSIM shared data plan for a group trip, run through these four questions:

Does the plan actually allow hotspot tethering, and if so, is there a cap on how much you can share? The answer is often buried in destination-specific fine print, not on the main product page.

Can you transfer data directly between accounts, or are you stuck with the hotspot workaround? This is the difference between a genuine shared plan and a technical compromise.

What happens to unused data? Plans that let it expire entirely are a poor deal for groups who tend to overestimate how much they'll use.

What does "unlimited" actually mean in terms of speed? Every unlimited travel eSIM applies throttling. The honest providers tell you exactly when and at what speed. The others let you find out the hard way at the worst possible moment.

Shared data on a travel eSIM is still a gap in the market. The brands that come closest are the ones with real data-transfer features, clear policies, and enough country coverage to handle multi-destination trips without switching plans.