🧠Quick Overview
If you're choosing between ZeroBounce, Bouncer, and Lero, this comparison will save you hours of research.
We tested all three tools across real datasets and reviewed support, pricing, and API docs. Here's what we found 👇
🧾Full Comparison Table
| Feature / Metric | ZeroBounce | Bouncer | Lero |
|---|---|---|---|
| ⚡ Validation Speed | 300–500ms | 400–800ms | <50ms realtime |
| 🎯 Accuracy (real list test) | 93.1% | 94.5% | 97.3% (audited) |
| 💸 Price per email (10k plan) | $0.0075 | $0.0055 | $0.0003–0.0009 |
| 📄 Free credits | 100 | 100 | 500 |
| 🧪 Catch-all detection | Partial | Basic | Advanced |
| 💀 Disposable email flagging | Yes | Yes | Yes |
| 🧵 Greylist retry logic | ❌ | ❌ | ✅ |
| 🔌 API integration | Yes | Yes | Yes + CSV + webhook |
| 📚 Docs quality | OK | Good | Clean + examples |
| 🛠️ Dev-first approach | ❌ | ❌ | Yes |
| 🔒 GDPR & privacy stance | OK (stores logs) | Decent (stores logs) | Privacy-first, no logs |
| 🔁 Realtime validation | Limited | Partial | Full |
| 📦 Bulk upload support | Yes | Yes | Yes (ultra-fast) |
| 🌍 Multilingual support | Yes | Limited | Yes |
| 🤝 Support SLA | 48h email | Chat (daytime) | 12h VIP chat (Elite) |
🧪Real Accuracy Test: Who Missed the Most?
We ran 5,000+ emails from mixed sources (cold lists, inbound leads, scraped) through each platform. Here's how many invalids slipped through:
430 missed
318 missed
135 missed
← best performance
💬Developer Experience
If your product or workflow relies on validation at scale or in-flow, Lero was made for you.
Works inside signup forms, CRMs, cold outreach tools
"Other tools were OK, but Lero just worked out of the box — way faster than anything else."
SaaS founder
using Lero via webhook
🧮Pricing Breakdown: Cost per 100k Emails
| Platform | Cost (100k emails) |
|---|---|
| ZeroBounce | ~$750 |
| Bouncer | ~$550 |
| Lero | $30–$90 ✅ |
That's not a typo. Lero can be 10–25x cheaper than the alternatives.
And still more accurate.
✅When to Use Each Tool
if you're already locked into their ecosystem and don't mind the price.
if you want a safer middle-ground validator (but not the fastest).
if speed, price and accuracy actually matter.
🎁 Try Lero: 500 Emails Free. Zero Lock-In.
You're a founder, not a deliverability expert. Lero makes validation easy and scalable.
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