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  • ZeroBounce vs. Instantly.ai
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ZeroBounce vs Instantly.ai Email Warmupⓘ Service Comparison

Get the best email warmupⓘ service comparison in your search for Instantly.ai alternatives. Compare these email deliverability warmup tools and find the best platform for improving your email deliverability and sender reputation.

Try Warmup
A woman in a yellow shirt looks at a laptop with her male coworker and sees an Overall Inbox Score of 85%.

ZeroBounce vs. Instantly.ai email warmupⓘ comparison overview

Compare email deliverability warmup tools at a glance. Check out the table below for a quick rundown of key features and highlights, followed by more detailed descriptions of Instantly.ai and ZeroBounce below.

Instantly.ai
SupportsZeroBounce-managed (automated) -
  • G-Suite
  • Office 365
  • Any inbox that supports SMTP
Self-managed (user sends the emails) -
  • Any inbox
Any inbox with SMTP
Account listings & daily limitsStarts at:

250 Warmup Seeds

2 Accounts Replies are dynamically based on engagement rules and can go up to 35%

*A warmup seed can perform up to 5 actions per email from a single warmup account. These actions may include opens, clicks, favorites, replies, and similar interactions.

Unlimited accounts and sending

Features such as Read Emulation and weekday sending are not available in the Growth plan.

MethodsAutomated sending

OR

Self-managed sending option

Automated sending to its Deliverability Network, which contains other warmup users
Email content usedUser-provided email content for self-managed option

AI-generated content for ZeroBounce-managed option

AI-generated content
Schedule sendingDeliver emails whenever you prefer with the self-managed Warmup optionWith Hypergrowth plan and above
Multiple languagesNoNo
Reporting dashboardYesYes
Placement & category monitoringYesYes
Authentication alignment trackingYesYes
Customizable engagement rulesYesWith Hypergrowth plan and above
Deliverability checks (check if emails land in spam or promotions)Yes, included with ZeroBounce ONE™ (Inbox Placement Test - includes testing for 20+ domains)No
Military-grade security and privacy complianceSOC 2 Type 2 certification
ISO-27001 certification
GDPR, CCPA, HIPAA, and PCI compliance
Compliance with GDPR and other relevant data protection laws
24/7 customer supportYesNo
Does it require IMAP?No, ZeroBounce only sends emails. It doesn’t read any of them to protect your confidentiality.Yes
Cancel any timeYesYes
Supports

ZeroBounce

ZeroBounce-managed (automated) -
  • G-Suite
  • Office 365
  • Any inbox that supports SMTP
Self-managed (user sends the emails) -
  • Any inbox

Instantly.ai

Any inbox with SMTP
Account listings & daily limits

ZeroBounce

Starts at:

250 Warmup Seeds

2 Accounts Replies are dynamically based on engagement rules and can go up to 35%

*A warmup seed can perform up to 5 actions per email from a single warmup account. These actions may include opens, clicks, favorites, replies, and similar interactions.

Instantly.ai

Unlimited accounts and sending

Features such as Read Emulation and weekday sending are not available in the Growth plan.

Methods

ZeroBounce

Automated sending

OR

Self-managed sending option

Instantly.ai

Automated sending to its Deliverability Network, which contains other warmup users
Email content used

ZeroBounce

User-provided email content for self-managed option

AI-generated content for ZeroBounce-managed option

Instantly.ai

AI-generated content
Schedule sending

ZeroBounce

Deliver emails whenever you prefer with the self-managed Warmup option

Instantly.ai

With Hypergrowth plan and above
Multiple languages

ZeroBounce

No

Instantly.ai

No
Reporting dashboard

ZeroBounce

Yes

Instantly.ai

Yes
Placement & category monitoring

ZeroBounce

Yes

Instantly.ai

Yes
Authentication alignment tracking

ZeroBounce

Yes

Instantly.ai

Yes
Customizable engagement rules

ZeroBounce

Yes

Instantly.ai

With Hypergrowth plan and above
Deliverability checks (check if emails land in spam or promotions)

ZeroBounce

Yes, included with ZeroBounce ONE™ (Inbox Placement Test - includes testing for 20+ domains)

Instantly.ai

No
Military-grade security and privacy compliance

ZeroBounce

SOC 2 Type 2 certification
ISO-27001 certification
GDPR, CCPA, HIPAA, and PCI compliance

Instantly.ai

Compliance with GDPR and other relevant data protection laws
24/7 customer support

ZeroBounce

Yes

Instantly.ai

No
Does it require IMAP?

ZeroBounce

No, ZeroBounce only sends emails. It doesn’t read any of them to protect your confidentiality.

Instantly.ai

Yes
Cancel any time

ZeroBounce

Yes

Instantly.ai

Yes

Latest comparison as of October 2024

Disclaimer: The third party's name is utilized for comparison purposes only and is the trademark of its respective owner. ZeroBounce claims no rights whatsoever in the use of such name and/or any related trademarks. ZeroBounce is not affiliated with the third party referenced on this page.

Scheduled sending

For many users, the automated email warmupⓘ process is all that’s required. However, if you want more detailed control over your business’s warmup process, you need to examine each company’s plans.

ZeroBounce Logo

ZeroBounce ImageWith the ZeroBounce-managed option, the Warmup automation will strive to emulate your historical sending patterns and behaviors.

ZeroBounce ImageHowever, if you’re more comfortable with complete control over the emails sent for Warmup, you can use the self-service option. With this option, ZeroBounce provides a list of seed email addresses for you to use, and you can use and schedule your real email campaigns and templates on your schedule. ZeroBounce will provide recommendations on the ideal sending schedule and volume.

Instantly.ai

ZeroBounce ImageScheduling is not available with the initial Growth plan. Emails will be sent on any given day based on the Warmup tool’s decision.

ZeroBounce ImageBy subscribing to Hypergrowth and above, you can control if emails are sent on weekdays only or on a mixture of weekdays and weekends.

Instantly.ai reporting dashboard

Instantly.ai provides a sophisticated and clean Warmup reporting dashboard that makes it easy to track your improvements.

Here’s a quick rundown of Instantly.ai’s reporting features, followed by ZeroBounce for comparison:

ZeroBounce Logo

ZeroBounce ImageTrack your Overall Inbox Score (percentage of emails reaching the inbox)

ZeroBounce ImageLifetime Inbox score improvement

ZeroBounce ImageToday and Last Run statistics

ZeroBounce ImageAll-time Warmup summary

ZeroBounce ImageEmail authentication and alignment tracking

ZeroBounce ONE™ package featuring Warmup

ZeroBounce ImageBlacklist monitoring

ZeroBounce ImageDMARC monitoring

Instantly.ai

ZeroBounce ImageOverview - Includes the number of emails sent, emails that landed in the Inbox, emails saved from spam, and received warmup emails.

ZeroBounce ImageDaily and last 7-day sending statistics

ZeroBounce ImageEmail deliverability score tracker with alerts for cold email readiness

ZeroBounce ImageSpam detection - Alerts users when deliverability issues arise so that they can resolve them fast

Customizable engagement rules

Instantly.ai offers more advanced control of its email warmupⓘ tool with the Hypergrowth plan. With its starting Growth plan, you can expect the core email warmupⓘ tool with basic sending features and little ability to customize.

With the higher plan, you’ll get access to additional email warmupⓘ features, including:

Instantly.ai

Read Emulation - Instantly.ai attempts to mimic actual human behavior by opening and reading through emails in realistic ways.

Weekdays-Only - You’ll be able to customize your schedule for sending emails. This is ideal for many businesses that only email on weekdays.

Daily Limits - You’ll also be able to set limits on how many emails are sent daily and adjust the rate at which you would like to receive replies.

When comparing ZeroBounce vs. Instantly.ai, ZeroBounce’s Warmup includes all available features regardless of subscription tier.

ZeroBounce Logo

Customize volume and engagement rules at any time - Warmup automatically adjusts your sending volume and engagement based on your goals. You can adjust this manually at any time through your settings.

Weekdays-only - You can switch between a mixture of weekends and weekdays only just by switching a toggle.

Adjust time zone - Update your time zone preference at any time.

Choose start-up dates - Start, pause, and adjust Warmup on your preferred date.

Email deliverability checks

Depending on your current email warmupⓘ progress, you may want to test out an actual email campaign to see where it lands.

ZeroBounce ONE™ includes the Inbox Placement Tester alongside its Warmup service. This test allows you to send an actual business email to 20+ well-known email service providers, find out where it lands, and get feedback on any discovered errors.

Inbox placement test

The Inbox Placement Tester is recommended for essential email campaigns to avoid possible errors keeping you from the inbox regardless of your domain reputation.

Comparatively, Instantly.ai offers no dedicated tester.

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.

Security & compliance

Whether you’re uploading your data for verification or sharing your accounts for email warm-up, protecting and securing your business data is vital.

ZeroBounce is firmly committed to providing users with military-grade security and data protection. Its detailed security overview outlines the company’s accreditations and practices.

ZeroBounce Logo
  • soc2
  • iso
  • hipaa
  • gdpr
  • privacy shield
  • ccpa

Check out our full security details

Instantly.ai

For comparison, Instantly.ai is fully compliant with GDPR and other relevant data protection regulations.

Use case scenarios

Who can benefit from the best email warmupⓘ tools? Any business that sends emails, especially if you have other professionals outside of your marketing team using email for outreach.

Sales and outreach professionals

When it comes to domain reputation, your marketing team isn’t likely the cause of negative impacts. It’s more likely that others in your company are uploading new, unverified contacts and engaging in other sending practices that hurt your deliverability.

To put it plainly, many of those cold outreach emails are going right to the spam folder.

Email warm-up isn’t meant to protect bad actors. You must sync up with your teammates, verify new leads, and stay within recommended daily sending limits. But email warm-up can help improve and repair your domain right now.

Warm up new business domains

Whether you’re a new business or looking to create separate subdomains for your sales teams, email warm-up is critical.

Domain reputation is like a credit score. While you may not have bad credit, having no credit also limits what you can accomplish.

Email warmupⓘ tools help gradually build that reputation over time with increased sending and positive engagement. This effort helps build the trust of internet service providers and shows that your business is committed to safe email-sending practices.

Email marketers

While we said that marketers likely know the best practices, it’s not always true. As an email validation tool for 500,000+ customers, we know firsthand that not everyone is cleaning their lists enough.

If you’re sending out campaigns to dirty lists, your bounce rate climbs, your engagement rate falls, and your reputation suffers.

Email warmup tools can help repair the damage caused by lazy email marketing practices. What’s better is that an email warm-up service can actively improve your email deliverability automatically, allowing you to focus on key aspects of your campaigns, including copy and creative.

Frequently asked questions

Instantly.ai is an outreach, lead generation, and CRM platform that helps businesses assess leads, build email engagement, and maximize email deliverability.

ZeroBounce Logo