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Disclosure: This guide contains affiliate links.
Cheapest Plans Ranked
| Provider | Cheapest Plan | What You Get | The Catch |
|---|---|---|---|
| Shopee sellers | Often under $5 | Local eSIMs, sometimes unlimited + calls | No support, grey-market risk |
| Klook AIS eSIM | Frequent promos (often under $5) | AIS 5G data, 15GB/day full speed | Klook lock-in, data-only |
| Yesim | $1.68/day | Unlimited data, AIS/DTAC | Per-day cost adds up |
| Airalo | $6.00 | 3GB/7 days | Data-only |
| Saily | See plans / live pricing | Multi-network data | App required, data-only |
| 7-Eleven SIM | ~$9 (299 THB) | 15GB/8 days + Thai number | Airport queue, in-person only |
The Shopee Price Floor — Should You Buy There?
Shopee sellers offer real local eSIMs (AIS/DTAC/True) at a few dollars with instant email delivery. It's the cheapest path to big data allowances. But:
- ❌ No customer support if activation fails
- ❌ No refund policy beyond Shopee's generic returns
- ❌ Source unclear — resold carrier QRs, terms can change
- ⚠️ Cheap + obscure is a risky combo — refund complaints cluster around unknown sellers
The Smart-Cheap Picks
- Airalo 3GB/$6 — cheapest fixed plan from a major brand, AIS/TrueMove networks
- Yesim $1.68/day — cheapest unlimited daily rate we've verified
- 7-Eleven 299 THB SIM — cheapest with a real Thai number, if you'll queue
How Much Data Do You Actually Need?
- 1–3GB/week: messaging + maps → $6 covers it
- 5–10GB/week: social + Grab + photos → 10GB at ~$11
- 15GB+/week: tethering/streaming → unlimited plans (read the fair-use terms first)
Don't buy 20GB "just in case" — top-ups are instant and cheap.
Checked October 2026. Shopee and Klook prices fluctuate — verify live pricing.