Email Deliverability

Best lemwarm Alternative for Agencies & SaaS Platforms (2025 Guide)

Published on
June 26, 2025
Post by
Mike Shamsuddin
Best lemwarm Alternative for Agencies & SaaS Platforms (2025 Guide)

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You signed up for lemwarm.

It worked for a while.

But now you’ve got more clients and inboxes to deal with - giving you deliverability headaches.

You know it’s time to upgrade to an email deliverability tool built for serious senders.

But what’s the best lemwarm alternative for agencies and SaaS platforms?

Meet Mailivery, an email deliverability tool that doesn’t charge you per inbox, offers founder-led support and provides the most flexible and complete email warm-up API on the market.

Warm Up Unlimited Inboxes

lemwarm makes you pay per inbox. With monthly billing, that’s at least $29 per inbox each month (lemwarm’s Essential plan).

That means:

If you must warm up 50 email accounts…

You’ll pay $1450/month.

Mailivery’s pricing works differently. It does not punish you for scaling your warmup. Instead, you can warm up unlimited inboxes with a cap on daily warmup emails.

For example:

Mailivery’s business plan allows you to send 2000 warm-up emails/day for a mere $199/month. It becomes even more cost effective if you opt for yearly billing: $149.25/month.

All Features with Every Plan

lemwarm’s Essential plan lacks many of the advanced features of their Smart plan, such as:

  • Personalized warmup emails
  • Warming up your own templates
  • Deliverability alerts

Mailivery gives you access to ALL features.

No matter what plan you select, you can use everything Mailivery has to offer, such as:

  • Personalized human-like warm-up emails
  • Custom warm-up templates
  • Detailed analytics
  • Email scheduling & balancing to mimic natural behavior
  • Email blacklist checks

Purchasing a higher-level Mailivery plan just gives you more of the good stuff, like more daily warm-up emails and email verification credits.

Verify Your Email List

Email deliverability starts with your email list. You should verify each email before using it.

If you send to unverified emails, you risk:

  • Getting a lot of bounces
  • Falling into spam traps (Fake email addresses used by ISPs and anti-spam organizations to catch spammers)
  • Ruining your sender reputation

Unfortunately, lemwarm does not offer an email list verifier. You’re at the mercy of third-party tools for this essential step in maintaining or improving email deliverability.

Mailivery’s 2-Layer Email Verifier

Mailivery uses a unique 2-layer verification process:

Step 1️⃣ : It checks each address against a proprietary database of more than 100 million bad emails and spam traps

Step 2️⃣ : It then runs a standard technical verification check to ensure the cleanest and safest list for cold outreach

A Warm-Up Pool You Can Trust

lemwarm seems to have a solid premium warm up network in over 150 countries. However, it doesn’t provide clear info on their warm-up pool.

With Mailivery, your warm-up emails go to a network of real inboxes only. No fake or junk mailboxes used by some other warmup services.

Mailivery’s inbox pool is actively monitored, diversified, and optimized for real-world sending behavior. And no AI agent email warmup. Mailivery uses only SMTP and IMAP for more human-like interactions.

No Easily Detectable Warm Up Emails

lemwarm labels all email warmup emails with “lemwarmup.”

The presence of this word in the subject line makes it shockingly easy for email providers to detect warm-up emails.

When email providers know they’re dealing with warmup emails, instead of real human email interaction, the whole warmup process could fall apart.

Mailivery does it smarter: each user gets a unique filter code, meaning you can still filter out the emails, but they will not alert providers to potential warm-up emails.

The result?

Your domain reputation stays cleaner, and warm-up does what it should: boost inbox placement, not hurt it.

Founder-Led Support - Real People, Real Answers

lemwarm has a solid support team.

However, the larger product ecosystem means less room for custom tweaks.

Mailivery’s team is hands-on. Agencies and SaaS partners regularly help improve the product.

  • Need a custom API tweak? We’ll look into it.
  • Have an idea to make managing 100+ inboxes easier? That’s exactly how new features get built.

You’re not just using the tool. You’re shaping it.

Premium Warm-Up API for SaaS Integrations

lemwarm does not offer a standalone API for embedding warm-up natively into other software.

Mailivery does, and it’s the most flexible email warm-up API on the market.

You’re not stuck with cookie-cutter settings or limited controls.

You can connect any inbox type, control warm-up speed, create custom templates, and fetch full warm-up performance data and inbox health indicators.

With Mailivery’s API, you can add email warm-up to your app, your way.

lemwarm and Mailivery - Compared

  lemwarm Mailivery
Unlimited inboxes
Pricing model Per inbox Flat monthly fee based on warm-up volume
Cost of cheapest plan $29/month $29/month
All features accessible in every plan
Personalized warm-up emails Only in the Smart plan ($49/month)
Customized warm-up templates Only in the Smart plan ($49/month)
Email list verification
API for SaaS

Ready to Switch to Mailivery?

  • Don’t keep paying more for every new client inbox
  • Don’t settle for a warm-up tool that leaves a trace
  • Try Mailivery free for 7 days, and give your agency or SaaS platform the deliverability edge it deserves

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