Email Verification
Requiems API vs Kickbox
Kickbox is an email verification platform used by 150,000+ senders, with real-time API, bulk list cleaning, and a proprietary Sendex deliverability score. Single-purpose; no phone or IP coverage.
No proprietary score lock-in
Kickbox's Sendex score is a black box. Requiems API returns raw signals so you build your own deliverability logic.
Beyond email
Kickbox is email-only. Requiems API covers phone, IP, finance, and more β same subscription.
SOC 2 + GDPR
Both platforms are SOC 2 / GDPR compliant. Requiems API adds per-call audit logs out of the box.
Feature comparison
| Feature | Requiems API | Kickbox |
|---|---|---|
| Syntax validation | ||
| DNS / MX record check | ||
| SMTP verification | ||
| Catch-all detection | ||
| Disposable email detection | ||
| Role-based address detection | ||
| Deliverability score | ||
| Bulk list cleaning | ||
| Real-time API | ||
| Deliverability consulting | ||
| IP geolocation | ||
| Phone validation |
Benchmarks
- Latency (p50)
- ~120ms p50
- Uptime SLA
- 99.9%
- API coverage
- 100+ APIs
- Free tier
- 500 req/mo
- Latency (p50)
- ~130ms p50 (est.)
- Uptime SLA
- 99.9%
- API coverage
- ~6 email endpoints
- Free tier
- 100 free verifications
Philosophy
Kickbox is a polished email verification product with first-class deliverability consulting services. Requiems API takes a developer-first approach: expose raw, accurate signals and let engineers decide how to weight them. We're the right fit when you want data, not advice.
Migrating from Kickbox
-
1
Replace `api.kickbox.com` base URL with `requiems.xyz`
-
2
Swap `apikey` query param for `requiems-api-key: <key>` header
-
3
Map `result` field: `deliverable` stays; `undeliverable` stays; `risky` maps to Requiems `risky`
Ready to switch from Kickbox?
500 free API calls per month, no credit card required. Migration takes under an hour.