Mailbeam vs ZeroBounce
An honest comparison of features, pricing, and performance — updated January 2025.
TL;DR — Which should you choose?
Choose Mailbeam if:
- You need EU/GDPR-compliant processing with EU data residency
- You're integrating real-time verification into a signup flow (< 100ms is critical)
- You want transparent per-verification pricing with no credits or multipliers
Choose ZeroBounce if:
- You have large existing lists to clean in bulk and are US-based
- Your team already uses ZeroBounce integrations (Mailchimp, HubSpot, etc.)
Feature-by-feature comparison
| Feature | Mailbeam | ZeroBounce |
|---|---|---|
| Pricing | ||
| Free tier | ||
| Free tier size | 1,000/month | 100 credits/month |
| Pricing model | Per-verification | Credits |
| Credits required | ||
| Monthly subscription | ||
| Annual discount | 20% | yes (varies) |
| Price at 50K/month | €49 | ~$159 |
| Price at 1M/month | €499 | ~$1,999 |
| Verification checks | ||
| Syntax validation | ||
| MX records | ||
| SMTP probing | ||
| Disposable detection | ||
| Role-based detection | ||
| Catch-all detection | ||
| AI quality scoring (0–100) | ||
| Explainable AI reason field | ||
| Typo suggestions | ||
| API & platform | ||
| Real-time API (< 200ms) | ||
| P95 response time | < 100ms | ~300ms |
| Batch/bulk verification | ||
| Webhooks | ||
| Official SDKs | 6 languages | partial (3rd-party) |
| OpenAPI specification | ||
| Test / sandbox mode | ||
| Compliance & security | ||
| EU data residency | ||
| GDPR compliant (native) | ||
| DPA included | yes (on request) | |
| No US data transfer | ||
| Server location | Frankfurt, EU | Florida, US |
| Developer experience | ||
| Modern dashboard | ||
| Documentation quality | Excellent | Good |
| TypeScript support | ||
| Error messages | Descriptive + reason code | Generic |
| Support | ||
| Free plan support | Community forum | |
| Email support | yes (Starter+) | |
| Priority support | yes (Growth+) | yes (paid) |
| Uptime SLA | 99.9% (Pro+) | 99.9%+ |
Pricing comparison at every volume
| Monthly volume | Mailbeam | ZeroBounce | Saving |
|---|---|---|---|
| 1K / month | €0(Free) | ~$18 | 100% less |
| 10K / month | €19(Starter) | ~$79 | 76% less |
| 50K / month | €49(Growth) | ~$159 | 69% less |
| 200K / month | €149(Pro) | ~$499 | 70% less |
| 1M / month | €499(Scale) | ~$1,999 | 75% less |
ZeroBounce prices are approximate based on public information as of January 2025. Actual prices may vary.
Feature analysis
Real-time API performance
Mailbeam winsMailbeam is built specifically for real-time signup verification — p95 latency under 100ms from EU regions. ZeroBounce was designed for bulk list cleaning first; its real-time API is a secondary product with reported latencies of 200–400ms. For signup flows where users wait on a page, the difference between 80ms and 350ms is the difference between invisible and noticeable.
GDPR and EU compliance
Mailbeam winsMailbeam stores and processes all email addresses on servers in Frankfurt, Germany. Zero data leaves the EU. ZeroBounce is headquartered in Florida and processes data on US servers. For European SaaS companies, sending user-submitted email addresses to a US third-party processor creates GDPR compliance obligations that Mailbeam eliminates entirely. A signed DPA is available on all Mailbeam plans; ZeroBounce provides one on request.
AI catch-all scoring
Mailbeam winsCatch-all domains (those that accept all incoming mail) are one of the hardest problems in email verification. ZeroBounce flags them as 'Catch-All' and leaves you to decide. Mailbeam uses an AI model trained on sending behavior patterns to produce a 0–100 quality score for catch-all addresses, along with a machine-readable reason field. This means you can accept high-scoring catch-all addresses from well-known corporate domains while blocking low-quality ones.
Pricing model
Mailbeam winsZeroBounce sells credits in bundles. Credits don't map 1:1 to verifications — some operations cost multiple credits. This makes your bill hard to predict. Mailbeam charges one unit per verification, every time, with no multipliers or bundle expiry. At 50K verifications per month, ZeroBounce costs approximately $159 versus Mailbeam's €49 — a 69% saving with cleaner billing.
Developer experience
Mailbeam winsMailbeam ships official SDKs for Node.js, Python, PHP, Ruby, and Go — all maintained, typed, and documented. ZeroBounce offers no official SDKs; developers rely on third-party community libraries of varying quality. Mailbeam's error responses include machine-readable reason codes so your application can respond intelligently to different failure modes, not just 'invalid email'.
Bulk verification
ZeroBounce winsZeroBounce has been doing bulk email list cleaning since 2013. Its dashboard integrates directly with Mailchimp, HubSpot, ActiveCampaign, and 20+ ESPs, and its bulk interface is mature and battle-tested. If your primary use case is cleaning large existing lists from within a marketing tool — not building a developer API integration — ZeroBounce's ecosystem may be a better fit.
Switching from ZeroBounce to Mailbeam
Most migrations take under an hour. Here's the key code change:
// Before — ZeroBounce
// ZeroBounce (old)
const res = await fetch(
`https://api.zerobounce.net/v2/validate?api_key=${apiKey}&email=${email}`
);
const { status } = await res.json();
if (status !== "Valid") return 422;
// After — Mailbeam
// Mailbeam (new)
import Mailbeam from "@mailbeam/sdk";
const mb = new Mailbeam({ apiKey: process.env.MAILBEAM_KEY });
const { valid, score, reason } = await mb.verify(email);
if (!valid || score < 60) return 422;Read the full migration guide: Migrating from ZeroBounce →
“We switched from ZeroBounce because we needed real GDPR compliance for our EU users, not just a checkbox. Mailbeam's Frankfurt hosting and DPA made the compliance conversation easy.”
Frequently asked questions
Start verifying emails — for free
1,000 free verifications per month. No credit card required. Switch from ZeroBounce in under an hour.