eSIM Data Pricing Explained: How Plans, Validity, and Fair-Use Caps Decide the Real Cost
eSIM data pricing looks like a simple dollars-per-GB question, but plan validity, minimum bundle size, and unlimited-plan fair-use clauses change the real cost. Here is how each major eSIM provider's published Europe pricing compares — with every number sourced.
What the eSIM data pricing question actually looks like
Every eSIM plan publishes three numbers that together set the real cost: the headline price, the data allowance in gigabytes, and the validity in days from activation. A fourth — the fair-use clause on plans labelled 'unlimited' — only matters once you exceed a daily threshold, but it is what turns most 'unlimited' eSIMs into capped plans in practice. We compared the published Europe-regional rate cards from Airalo, Saily, Holafly, Ubigi, and Nomad on 2026-04-30, and every price quoted in this article is read directly from the vendor's pricing page or — where the vendor blocks automated fetching — from a third-party aggregator that mirrors the vendor's prices. The source URLs are listed at the foot of this article and in lib/pillars/content/esim-sources.ts.
Saily Europe: the 1 GB / 7-day plan is $4.99
Saily, operated by Nord Security, lists its Europe regional eSIM at saily.com/esim-europe with plans starting at $4.99 for 1 GB / 7 days, $12.49 for 3 GB / 30 days, $19.49 for 5 GB / 30 days, $35.99 for 10 GB / 30 days, and $95.99 for 50 GB / 90 days. Saily's unlimited Europe plans run from $28.99 (7 days) to $71.99 (30 days). The Europe regional bundle covers 35 European countries. The unlimited tiers carry a fair-use clause: after a 5 GB / day soft cap, speed throttles to 1 Mbps for the remainder of the day (per the saily.com/blog/what-is-fair-usage-policy page; the daily-cap number is published in the per-plan table on aggregator esimdb.com/region/europe/saily). Tethering / hotspot is allowed on every Saily plan with no per-plan device cap, per the support article at support.saily.com.
Airalo Europe: 14 plan tiers from 1 GB to 100 GB
Airalo lists its Europe regional plan at airalo.com/europe-esim with 42 countries covered and prices in EUR (geo-detected). The full ladder as of 2026-04-30: 1 GB / 3 days €4.50, 3 GB / 3 days €9, 3 GB / 7 days €10, 5 GB / 7 days €16.50, 10 GB / 7 days €23, 5 GB / 15 days €17, 10 GB / 15 days €25, 20 GB / 15 days €41.50, 5 GB / 30 days €17.50, 10 GB / 30 days €27.50, 20 GB / 30 days €42.50, 50 GB / 30 days €61.50, 50 GB / 90 days €88, 100 GB / 180 days €163. Airalo also offers unlimited Europe plans; per the airalo.com/blog/is-my-data-being-throttled article, unlimited plans throttle to 1 Mbps after 3 GB used in a single day. Fixed-size plans (the EUR ladder above) do not carry a fair-use clause. Tethering and personal hotspot are explicitly allowed (verbatim from the help-center: 'Yes, you can use your personal hotspot with your eSIM as long as it is supported by your device and the network').
Holafly Europe: flat-rate unlimited only, $11.70–$74.90
Holafly's Europe eSIM at esim.holafly.com/esim-europe is sold exclusively as flat-rate unlimited — the page does not list any fixed GB plans. Durations as of 2026-04-30: 3 days $11.70, 5 days $19.50, 7 days $27.30, 10 days $36.90, 15 days $50.90, 30 days $74.90. The Europe plan covers 33 countries. Section 6.3 of esim.holafly.com/terms-and-conditions says verbatim: 'If you purchase an unlimited Data Plan please note your data coverage and speed may be subject to a network service provider's fair use policy.' Holafly does not publish a specific GB threshold or post-throttle speed in section 6.3. Tethering is capped on the Europe plan: the page itself states 'Share 1 GB of data per day with family, friends, or fellow travelers' — meaning the unlimited data is unmetered for the primary device but only 1 GB / day can flow through the hotspot.
Ubigi Europe: cheapest 1 GB plan at $3, $14 for 10 GB / 30 days
Ubigi (operated by Transatel) lists Europe plans at cellulardata.ubigi.com/en/data-plans-and-coverage/ubigi-esim-data-plans with 50+ destinations covered. Plans as of 2026-04-30: 1 GB / 7 days $3, 3 GB / 15 days $6, 10 GB / 7 days $12, 10 GB / 30 days $14, Unlimited / 7 days $35. Ubigi's terms at ubigi.com/conditions reference a generic 'do not degrade network capacity' clause — no numeric daily-throttle threshold is published. Tethering is allowed and documented in a dedicated FAQ article at cellulardata.ubigi.com/help-center.
Nomad Europe: 35 countries, 512 kbps post-throttle on unlimited
Nomad (formerly getnomad.app, now nomadesim.com) lists its Europe regional plan at nomadesim.com/europe-eSIM with 35 European countries. Plans as of 2026-04-30 in EUR: 1 GB / 7 days €4.70, 3 GB / 30 days €10.25, 5 GB / 30 days €11.96, 10 GB / 30 days €15.37, 20 GB / 30 days €18.79 (sale price), 50 GB / 30 days €24.77 (sale price), Unlimited / 5 days €15.37, Unlimited / 10 days €28.18. The unlimited plan page states verbatim: 'You can continue to use your data at a throttled speed of 512kbps after you've used up your daily allocation.' The exact daily allocation is not numerically stated on the Europe page itself. Tethering is allowed (verbatim: 'Yes, Nomad's eSIMs support tethering / hotspot').
Per-GB price is misleading without validity
Headline $/GB hides validity. Saily's $4.99 / 1 GB / 7-day plan is the cheapest entry point for a one-week trip — but on a per-GB basis it is $4.99 / GB. The same vendor's 10 GB / 30 days is $35.99, or $3.60 / GB. Airalo's 50 GB / 30 days at €61.50 works out to about €1.23 / GB. Nomad's 50 GB / 30 days at €24.77 (sale) is about €0.50 / GB. The cheapest per-GB option among fixed plans for our 5 GB / 30 days reference SKU is Nomad at €11.96 (~$12 USD), then Ubigi 10 GB / 30 days at $14, then Saily 5 GB / 30 days at $19.49, then Airalo 5 GB / 30 days at €17.50 (~$18 USD). Holafly is omitted from this comparison because the Europe plan is sold only as flat-rate unlimited.
Why every "unlimited" eSIM has a daily cap
Travel-eSIM unlimited plans are sold by aggregators that buy data wholesale from local mobile networks. The local network bills the aggregator per gigabyte; the aggregator absorbs that cost up to a daily threshold and throttles past it. The thresholds and post-throttle speeds the providers publish: Airalo 1 Mbps after 3 GB / day (per airalo.com/blog/is-my-data-being-throttled); Saily 1 Mbps after a 5 GB / day soft cap (per saily.com/blog/what-is-fair-usage-policy and the per-plan table on esimdb.com); Nomad 512 kbps post-throttle on Europe unlimited plans (per nomadesim.com/europe-eSIM); Holafly does not publish a numeric threshold in section 6.3 of its terms. The practical implication: if you are streaming HD video or running multiple devices via hotspot, even an 'unlimited' plan will hit the daily throttle and your effective speed drops to messaging-grade.
How to compare eSIM plans without getting fooled
Before comparing, fix three things: (1) The data size you actually need — light maps + messaging is 1–3 GB / week; navigation + social is 5–10 GB / week; video calls or streaming is 1–3 GB / day. (2) The trip length — pick a plan whose validity matches or exceeds your trip. (3) Whether you need tethering on a meaningful scale (Holafly's Europe plan caps hotspot at 1 GB / day; Saily, Airalo, Nomad, and Ubigi do not cap hotspot beyond their normal data allowance). Then compare the SKUs that match those constraints. Use this site's pillar table at /esim for the side-by-side cell view; every cell links back to the source page in the registry.
Sources
Airalo Europe pricing: airalo.com/europe-esim. Airalo throttle policy: airalo.com/blog/is-my-data-being-throttled. Airalo tethering: airalo.com/help/using-managing-esims/ZSEEHBT5HW6F/can-i-use-tethering-personal-hotspot. Saily Europe pricing: saily.com/esim-europe (read via aggregator esimdb.com/region/europe/saily because saily.com blocks automated fetching). Saily fair-use: saily.com/blog/what-is-fair-usage-policy. Saily tethering: support.saily.com/hc/en-us/articles/12822169782812. Holafly Europe pricing: esim.holafly.com/esim-europe. Holafly terms: esim.holafly.com/terms-and-conditions. Ubigi Europe pricing: cellulardata.ubigi.com/en/data-plans-and-coverage/ubigi-esim-data-plans. Ubigi terms: ubigi.com/conditions. Nomad Europe pricing: nomadesim.com/europe-eSIM. All URLs accessed 2026-04-30.