Retainer vs Stacks

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Retainer compared with Stacks
Detail	Retainer	Stacks
What it does	CRM software that watches renewals, quiet relationships, stalled proposals, and unpaid invoices for independent consultants	All-in-one business platform with CRM, email marketing, invoicing, scheduling, support and tasks, free forever with unlimited users
Stage	MVP	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Freemium
Pricing	Free during beta; paid plans pricing to be announced before beta ends. Beta users will receive notice and preferred pricing.	Free: $0 per month, free forever, includes all seven tools with unlimited users and contacts, plus 50 one-time AI credits. AI Pro: $99 per month or $995 per year (approximately 16% off monthly), includes everything in Free plus continued AI use, no Stacks branding, and priority support.
Key features	Today queue that ranks renewals, quiet relationships, stalled proposals, unpaid invoices, and unbilled hours Six-stage deal pipeline that converts to engagement with one click Time and invoicing with retainer utilization tracking Weekly Monday digest email with priorities Engagement tracking for retainers, projects, and hourly work	AI email and follow-up writing on-brand in seconds AI lead scoring and prioritization AI invoice and receipt reading from photos
What makes it different	Watches what's about to slip before it costs you, ranked by relationship value not just time elapsed No empty database phase; calendar scan drafts your client list in minutes Single-user CRM built for one person's book of business, not shared sales pipelines Combines pipeline, delivery, and invoicing vocabulary in one place without context loss	Free forever with all seven core tools and unlimited users at no per-user fees No per-user pricing model compared to competitors like Pipedrive, Calendly and Intercom Integrated AI features included with 50 free credits and optional AI Pro subscription Built specifically for solopreneurs, freelancers and small teams
Community votes	0	0
DR (Domain Rating by Ahrefs)	1 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	0
Citation Flow (Majestic)	21	29
Referring domains (Majestic)	8	1

5 details filled in for both companies.

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