Index · Cert expiry · Fastest sites · Free tools · API
18 popular payments sites, ranked by security-header score. Live data, built 2026-11-01.
| # | Site | Headers | Score | Cert days | Avail | ms |
|---|---|---|---|---|---|---|
| 1 | stripe.com | B | 83 | 189 | 100% | 123.0 |
| 2 | revolut.com | B | 83 | 42 | 100% | 131.5 |
| 3 | adyen.com | B | 83 | 68 | 100% | 153.3 |
| 4 | lemonsqueezy.com | B | 83 | 60 | 100% | 150.6 |
| 5 | paddle.com | B | 83 | 69 | 100% | 106.2 |
| 6 | ko-fi.com | B | 83 | 84 | 100% | 36.7 |
| 7 | paypal.com | C | 67 | 160 | 100% | 214.5 |
| 8 | square.com | C | 67 | 56 | 100% | 244.0 |
| 9 | wise.com | C | 67 | 194 | 100% | 923.4 |
| 10 | brex.com | C | 67 | 89 | 100% | 175.6 |
| 11 | ramp.com | C | 67 | 89 | 100% | 918.2 |
| 12 | klarna.com | C | 67 | 145 | 100% | 614.0 |
| 13 | mercury.com | C | 50 | 43 | 100% | 98.6 |
| 14 | gumroad.com | C | 50 | 62 | 100% | 33.3 |
| 15 | patreon.com | C | 50 | 76 | 100% | 109.8 |
| 16 | checkout.com | D | 33 | 44 | 100% | 280.9 |
| 17 | affirm.com | D | 33 | 65 | 100% | 56.7 |
| 18 | plaid.com | F | 17 | 134 | 100% | 134.8 |