Inbox Attack vs Sopro

A head-to-head comparison of Inbox Attack and Sopro in lead generation agencies, scored across the same 5 weighted criteria so you can see exactly where each agency is stronger.

Inbox Attack

B2B marketing that doesn't hold you hostage.

67/ 100 overall

Sopro

Fully managed multi-channel B2B outreach that starts qualified sales conversations.

79/ 100 overallHigher score

Score-by-score

Criterion	Inbox Attack	Sopro
Website Presence(20%)	74	90
Search Visibility(20%)	38	58
Trust & Credibility(20%)	79	85
Market Presence(15%)	68	82
Customer Satisfaction(10%)	86	84
Overall	67	79

Pricing at a glance

Inbox Attack

Model: Hybrid fixed-fee/project pricing plus monthly retainer options, with a la carte service pricing and paid 1:1 sessions. Specifically: one-off system builds and audits sold at flat fees, channel/package builds sold as fixed-price packages, and an ongoing 3-month managed engagement sold as a monthly retainer. Not performance-based; the site explicitly says they turn down commission-based projects and appointment-setting work.
Typical range: $145-$2,650 per fixed-price service or session

Full Inbox Attack pricing →

Sopro

Model: Custom-quoted monthly retainer for a fully managed, bespoke multi-channel B2B outreach service; not a published tiered package or pay-per-lead plan.

Full Sopro pricing →

Inbox Attack profile →Sopro profile →← All lead generation agencies