ZeroBounce vs. Warmy.io

Which mailboxes are supported?

Most popular email providers will support SMTP. Examples include:

• Gmail/G-Suite
• Office 365
• Yahoo
• AOL
• AWS
• Salesforce

If you have any doubts regarding your specific mail provider, check your provider documentation or contact their support team for more information.

Daily sending limits, email warmup actions, and account listings

After connecting your mailbox, you’ll need to select an email warm-up service plan that can adequately warm all of your business email domains. Email warmupⓘ services typically provide limitations for the number of mailboxes you can warm, the number of daily emails sent, or the number of actions/replies.

ZeroBounce ONE™

250 Warmup seeds

100 Inbox Placement Tests

Ongoing email authentication alignment tracking

Also included with ZeroBounce at no additional cost:

100 Email Server Tests

20 Blacklist Monitor scans every 12 hours

DMARC Monitoring for up to 5 domains

10,000 Email Finder searches

Warmy.io

Warm up 1 mailbox

Send up to 100 messages per day

1 DNS record test (for authentication, rDNS, MX, A records, etc.)

1 Inbox Placement Testⓘ

The primary difference with ZeroBounce vs Warmy.io is that the latter primarily supports the email warm-up tool. By comparison, ZeroBounce bundles its Warmup service in a complete email deliverabilityⓘ package designed to support and enhance your inbox placement in all critical areas.

As such, ZeroBounce allows you to warm up more domains to support better sending practices with your domain and subdomains. It also protects your sender reputation and tracks threats seamlessly through the same dashboard by adding DMARC monitors, blacklist monitors, and testing to ensure your email campaigns aren’t threatened.

Email warmup reporting dashboard

Your reporting dashboard is one of the most critical components of your email warmupⓘ experience. To ensure you’re getting value from the tool, you’ll want detailed statistics on how many emails are sent, where they land, and how your score has improved over time.

Here’s an overview of each platform's reporting metrics:

ZeroBounce ONE™

Tracks daily emails sent & received

Provides a daily, weekly, and all-time overview of warm-up performance (Overall Inbox Score)

Inbox Score improvement over time

Inbox score for individual warmup runs

Placement tracking that identifies if emails go to the inbox, spam, or go undelivered

Email authenticationⓘ and alignment tracking for DMARC, SPF, and DKIM

Quick snapshot views for all of your Warmup accounts that show emails processed, inboxed emails, spam/promo emails, and overall inbox score

Warmy.io

Tracks daily emails sent & received

Scores the deliverability percentage for emails sent to each contact in your network

Provides a daily, weekly, and all-time overview of warm-up performance

Has a dedicated placement checker that tells you if emails go to the inbox, spam, or go undelivered

Tracks your deliverability with different ESPs and ISPs

Verifies DNS records and email authenticationⓘ alignment

Email deliverability checks

The core goal of using an email warm-up tool is to improve your email deliverabilityⓘ. Effective warmup can take time, and you’ll want to continue warming inboxes even after you’ve achieved your desired score for continued protection.

However, you’ll want to conduct real tests on where your actual email campaigns are landing before you send them to ensure warmup has been worthwhile.

Both Warmy.io and ZeroBounce include Inbox Placement Tests in their packages, which effectively gauge where your email will land with different ISPs and ESPs. It can also provide data on what’s triggering spam filters and other errors in your email that impact deliverability.

ZeroBounce provides 1 Inbox Placement Testⓘ for free with all accounts. However, with the ZeroBounce ONE™ Subscription that includes Warmup, you’ll receive 100 of these tests to go along with your Warmup tool. Comparatively, Warmy.io provides 1 Inbox Placement Testⓘ

You can acquire more tests for each platform by upgrading to higher-tier plans.

Does ZeroBounce have access to read my emails?

Any email warmupⓘ service will read the emails sent to the privately-owned seed email addresses, so that they can perform realistic, authentic behaviors.

However, ZeroBounce doesn’t read any emails found in the connected inbox. The company maintains strict adherence to security and privacy regulations to protect your data.