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Zapmail
ListKit.io
PrimaryInbox.ai
Warmup Inbox
SmartLead.ai
InboxKit
The cold email infrastructure trusted by 1,200+ agencies. Pre-warmed Google and Outlook inboxes, fully configured and ready to send — from $0.35 per inbox.

Code Effects is the fastest and most intuitive .NET business rules engine trusted by government entities and Fortune 500 corporations all over the world

Website, pricing, platforms and company facts side by side.
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| Website | puzzleinbox.com | codeeffects.com |
| Pricing | — | |
| Company | 2023 | 2009 |
| Listed in |
In their own words, as submitted to SaaSHub.


Puzzle Inbox is a cold email infrastructure provider offering pre-warmed Google Workspace and Outlook 365 inboxes, fully configured and ready to send in 24–72 hours. Trusted by 1,200+ agencies and sales teams worldwide, with over 70,800 active inboxes deployed, Puzzle Inbox is the go-to solution...
Code Effects Software is the developer of state-of-the-art business rules engine that combines an incredible performance of rule evaluation with revolutionary web interface, allowing the end-users to author and manage their corporate business rules with no knowledge of programming languages or IT...
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