InboxKit vs Cheapinboxes: Budget Cold Email Infrastructure Compared
InboxKit and Cheapinboxes both target budget cold email. Here is which actually delivers better value for your outbound operations.
InboxKit vs Cheapinboxes: Budget Segment Comparison
InboxKit and Cheapinboxes compete for budget-conscious cold email operators. Both offer shared Google Workspace infrastructure at low per-inbox prices. The trade-offs are similar — but are there meaningful differences between the two?
| Feature | Puzzle Inbox | Cheapinboxes |
|---|---|---|
| Google Workspace | ✓ | ✓ |
| Outlook 365 | — | — |
| Pre-warming | — | — |
| Starting price | $2-4/inbox | $1.50-3/inbox |
| Track record | Newer | Established |
| Support |
Core Similarities
Both providers target the budget segment. Both use shared Google Workspace infrastructure. Both lack pre-warming. Both have email-only support with slow response times. Both have high deliverability variability due to shared pools.
The Real Difference: Track Record
Cheapinboxes has been in market longer. InboxKit is newer with less operational history.
Deliverability
Both providers produce similar results:
- Reply rate: 1.5-2.5% average
- Spam placement: 10-20% variable
The Honest Answer
Neither provider is clearly better. The choice is essentially arbitrary. Both have the structural limitations of budget shared infrastructure.
Related Reading
- How Many Cold Email Inboxes Do You Actually Need? — A practical calculator for determining the right number of inboxes based on your email volume, ICP size, and meeting goals.
- Cold Email Inbox Management at Scale: Running 100+ Inboxes — How to manage 100+ cold email inboxes without chaos — organization systems, monitoring, deliverability checks, and team workflows that actually hold up at scale.
- The Real Cost of Cheap Inboxes — What Nobody Tells You About Budget Providers — Budget inbox providers advertise rock-bottom prices, but the hidden costs of bad deliverability, shared infrastructure, and poor support will cost you far more.
- How Many Inboxes Do You Actually Need for Cold Email? — Calculate exactly how many inboxes and domains you need for cold email at any volume. Includes formulas for 100, 500, and 1,000 emails per day.
- How to Test Cold Email Inbox Placement Before Launching a Campaign — Don't launch a cold email campaign without testing inbox placement first. Here's how to check if your emails land in inbox or spam before you send a single prospect email.