Scope of the Test
Between September and October 2025, PriceCheckMaster conducted simultaneous activations of Airalo, Holafly and Seyferttec eSIM plans in Spain, France, Italy, Mexico, Dominican Republic and Colombia. Each line was installed on identical unlocked iPhones to ensure parity.
| Metric | Airalo | Holafly | Seyferttec eSIM |
|---|---|---|---|
| Average download speed (Mbps) | 22.4 | 19.7 | 27.8 |
| Average latency (ms) | 148 | 152 | 132 |
| Connection stability (% uptime) | 95.8% | 93.4% | 97.6% |
| Support response time (first reply) | ~18 min (chat) | ~9 min (WhatsApp) | ~3 min (live agent) |
These measurements were averaged across 20 sessions per country, using Speedtest.net and Fast.com benchmarks. Support response times reflect the first human reply after an English or Spanish inquiry about plan status or top-up options.
Findings and Observations
Seyferttec eSIM delivered the most consistent connectivity in regions with mixed 4G/5G infrastructure such as Mexico and the Caribbean. In European cities, Airalo maintained solid speeds but relied primarily on automated chat responses. Holafly performed respectably on throughput but slower on first-response support.
The difference between human and automated assistance was notable: while Airalo and Holafly rely on chatbot escalation, Seyferttec’s 24/7 bilingual agents solved setup or APN issues within minutes.
Note: These figures represent PriceCheckMaster’s internal test results for the period indicated and are not a guarantee of future performance. Actual performance may vary by country, local carrier used by each eSIM provider, network congestion, and user device. All tests were performed on factory-unlocked iPhone 13 units running a clean, up-to-date OS, using the same SIM/eSIM slot and comparable test conditions.
📚 Continue the 2025 eSIM Market Series
This article continues the Independent 2025 eSIM Market Series, comparing real-world performance after the initial pricing review.