I Tested 5 eSIM Providers: Here's What Actually Works

Why I did this

I got tired of eSIM comparison articles that clearly never tested anything. Lists of features, affiliate links everywhere, and zero actual experience. So over several months of travel through Europe, Asia, and the US, I ran real tests with five providers: Airalo, Holafly, Nomad, Ubigi, and Vsimer. Same destinations, same usage patterns, notes on speed, activation, and what happened when things went wrong.

This isn't a ranking because the right answer depends on where you're going and how you travel. But here's what I found.

Airalo: the biggest catalog, inconsistent quality

Airalo has the widest selection of plans - 190+ countries. Their app is clean. Pricing is competitive. They've been in this space long enough to have established carrier partnerships in most markets.

What I noticed: quality varies significantly by region. Their European plans (which route through iBASIS and BICS partnerships) delivered consistent 20 to 40 Mbps download speeds in France, Germany, and Spain. Their Southeast Asia coverage was patchier. In rural Thailand, speeds dropped to under 2 Mbps during peak hours on what was marketed as a 4G plan.

Activation was reliable in every test. QR codes worked first try on both iOS and Android. Customer support via their in-app chat answered questions in 2 to 4 hours, which is decent.

Holafly: best for unlimited plans

Holafly leans into unlimited data plans and prices them accordingly. Their European unlimited plan costs around $27 for 7 days. That's higher than competitors, but the "unlimited" actually delivers consistent speeds throughout - I saw 15 to 30 Mbps consistently in Italy and Spain without noticeable throttling after heavy use.

For travelers who stream video, do a lot of video calls, or just can't be bothered tracking gigabytes, Holafly makes sense. For light users, you're overpaying for data you won't use.

Their customer support is good. 24/7 chat with actual humans, not just bots. When I had an activation issue in Japan (the QR code loaded slowly and timed out), their team resolved it in under 20 minutes.

Nomad: solid mid-range option

Nomad sits between Airalo and Holafly on price and feature set. Their plans are available for 100+ countries. Interface is clean. They offer both data-capped and unlimited options.

Performance was reliable in my tests across Europe and the US. Speed tests in London showed 25 to 45 Mbps download, which is perfectly usable. Nothing exceptional, nothing bad.

Their weak point is Asia. Coverage in Vietnam and Indonesia felt thin. I'd use Nomad for Europe or North America without hesitation, but I'd look elsewhere for Southeast Asia.

Ubigi: best for North America

Ubigi is a smaller name but their North America coverage is genuinely strong. They partner directly with T-Mobile US and Rogers Canada, which means you're getting native network speeds rather than roaming-equivalent connections. In New York, Chicago, and Los Angeles, I saw 80 to 150 Mbps on their US plan - faster than the other providers in the same cities.

Their European coverage is thinner. They're in fewer countries and I wouldn't pick them for an EU trip. But for anyone heading to the US or Canada, they're worth checking.

Vsimer: competitive on pricing, good for multi-country

Vsimer's regional plans for Europe and Asia are priced well. Their 10 GB EU plan comes in under what Airalo charges for the same data, and in testing, performance was comparable - 20 to 35 Mbps in major European cities. Their platform is straightforward: pick a country or region, buy a plan, get a QR code by email within minutes.

I tested their Japan plan and it connected to Docomo towers, which is what you want. Rural coverage on Shinkansen routes was solid. No dead spots on the Tokyo to Osaka journey.

Browse their plans at vsimer.com/countries if you want to compare for your specific destination.

What the testing actually showed

Network partner matters more than brand. A plan marketed by any provider that routes through weak or congested partner networks delivers poor speeds regardless of what the marketing says. Ask which carrier your eSIM connects to in your destination country - good providers will tell you clearly.

Activation reliability is non-negotiable. Every provider I tested activated successfully eventually, but the time and frustration varied. Airalo and Holafly were the most consistently smooth. Avoid any provider whose activation process requires you to contact support as a normal step.

Customer support quality separates good providers from frustrating ones. Test it before you travel by asking a question. Response time and answer quality tell you what you'll get when something actually breaks.

Also read: the eSIM vs physical SIM breakdown if you're still deciding whether eSIM is right for your travel style.