Compare Cold Email Inbox Providers
See how Slicey's isolated infrastructure stacks up against shared-panel providers.
| Feature | Slicey | Instantly | Smartlead | Infraforge | Mailforge |
|---|---|---|---|---|---|
| Per-domain isolation | Yes | No | No | No | No |
| No domino effect | Yes | No | No | No | No |
| Inboxes per domain | 49–99 | 3–5 | 3–5 | 3–5 | 2–3 |
| Free domain replacement | Yes | No | No | Paid | No |
| You own your domains | Yes | Varies | N/A | Yes | Varies |
| White-glove setup | Included | No | No | No | No |
| Price (at scale) | $49/domain | $36/domain | N/A | ~$30/domain | ~$27/domain |
Detailed comparisons
Slicey vs Instantly
The #1 cold email platform with built-in inbox infrastructure. Great sending tool, but their shared inbox panels create deliverability risk.
Slicey vs Smartlead
AI-powered cold email with auto-rotation. Strong sending features, but relies on third-party inboxes and shared warmup infrastructure.
Slicey vs Infraforge
Bulk inbox provider focused on volume. Competitive pricing, but uses shared Microsoft panels with the same domino effect problem.
Slicey vs Mailforge
Self-service infrastructure with auto-setup. Affordable for high volume, but shared infrastructure means shared risk.
Slicey vs Maildoso
Newer entrant offering managed inbox infrastructure. Competitive pricing but limited track record and shared panel architecture.