
StackMail
A self-hosted, unified webmail client. Connect multiple IMAP/SMTP accounts and manage them all in one clean interface.

Domains Monitor
zonefiles.io
Newly Registered Domains Lists
AllZonefiles.io
Domain-Monitor.io
DomainTools
WhoisXML API
Lists and datasets of registered domain names for 1,500+ TLDs, updated daily. Domain and reverse IP lookup, simple API.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | mailflow.sh | netapi.com |
| Pricing | ||
| Company | — | Startup from Cyprus |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Mailflow.sh yet.
NetAPI tracks 380M+ active domain names in 1,500+ TLDs, both generic (gTLD) and country-code (ccTLD) zones. Full and newly registered domain lists, updated daily for most zones; deleted domain lists for zones published in full every day Detailed datasets: DNS, IP address, hosting country,...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Mailflow.sh yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Mailflow.sh and NetAPI.
NetAPI's answer:
Security and threat intelligence teams (newly registered and compromised domains), brand protection and anti-phishing services, sales and marketing teams building lead lists, SEO and web analytics companies, and researchers who need complete lists of registered domains.
NetAPI's answer:
NetAPI was founded by Slava Olesik, who earlier founded zonefiles.io (he sold it in 2017; its later owners shut it down in August 2025). NetAPI is his current project in the same field: domain lists and datasets for 1,500+ TLDs, a simple API and free open datasets. It is run by CodeRockers LTD, Cyprus.
NetAPI's answer:
Every zone in one subscription: 380M+ active domains in 1,500+ TLDs, newly registered domains every day, enriched datasets and lists by DNS provider and registrar. We also publish free datasets: the daily NetAPI Top 1M websites ranking and compromised domain and IP lists (CC BY 4.0).
NetAPI's answer:
Plain CSV files and a simple API, every TLD in one plan from $49 a month, daily updates, and a founder who has worked with domain data since zonefiles.io.
Share your experience with using Mailflow.sh and NetAPI. For example, how are they different and which one is better?
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List of all active domains in all zones. Registered domains database with daily updates, contact details and powerful API. ccTLD and gTLD zones with contacts and details.
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