
MailReach.co
EasyDMARC
Warmy.io
MailGenius
GlockApps
Email Warmup by GMass
Folderly
Send a test email and see where it lands at Gmail, Outlook, Yahoo, Zoho and Aol: inbox, spam, or a tab like Promotions. The same run checks SPF, DKIM, DMARC, blacklists and content.
LayerStack’s Arm-based cloud virtual machines, powered by cloud-optimized CPU based on Arm architecture that deliver excellent cost-effective processing power, allowing you to easily complete the most demanding application development.

Website, pricing, platforms and company facts side by side.
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LayerStack Arm-based Cloud Server
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| Website | spamrate.is | layerstack.com |
| Pricing | — | |
| Company | 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.

I was the backend developer on a project where the marketing team ran our email campaigns. They were using five or six separate services for it, because, in their words, none of them gave the full set of tools they needed. I spent a weekend putting together something that ran all of those checks...
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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 SpamRate.is 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 SpamRate.is and LayerStack Arm-based Cloud Server.
SpamRate.is's answer
Small and midsize senders: SaaS and product teams, newsletter publishers and email marketers, developers responsible for transactional mail, WordPress and WooCommerce owners, and agencies handling deliverability for several clients.
SpamRate.is's answer
The marketing team on a project I worked on used five or six services to track deliverability, because none of them covered everything. I built an alpha over a weekend and hooked up real mailboxes. A few months of testing later it stopped being an internal tool.
SpamRate.is's answer
Real mailboxes at Gmail, Outlook, Yahoo and Zoho, not a predicted score. It tells you which tab the message landed in, not just inbox or spam, because Promotions and spam need different fixes. Authentication, blacklists, headers and content come out of the same test.
SpamRate.is's answer
Most tools answer one piece: your DNS is fine, or your content score is fine. Neither says where the message landed. SpamRate does placement, authentication, blacklists and content in one test, keeps the history so you can see when things changed, and reruns on a schedule with alerts. The first test needs no account.
SpamRate.is's answer
Python, FastAPI, PostgreSQL, Redis and Celery, plus a long-running asyncio service that holds IMAP connections to the test mailboxes. Jinja templates with Tailwind on the front, Docker everywhere. The plugin is PHP.
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