spFlat! vs Quartz

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

spFlat! compared with Quartz
Detail	spFlat!	Quartz
What it does	Automated SPF flattening service that prevents email delivery failures by managing SPF records within DNS lookup limits	AI-native email for Mac that prioritizes important messages and drafts replies in your voice
Stage	Not given	MVP
Founded	Not given	Not given
Based in	NL	CA
Pricing model	Freemium	Free
Pricing	Free 14-day trial. After trial: €10 per domain per month. No setup fees, cancel anytime.	Free during public beta
Key features	Automatic SPF record flattening DNS lookup limit prevention Real-time SPF monitoring 24/7 IP range monitoring 1-click DNS updates Free SPF lookup audit 99.9% uptime SLA	Local AI processing on Apple Silicon Automatic message categorization by importance AI-generated email drafts in your voice Smart inbox organization with collapsible categories Gmail integration
What makes it different	Automatically converts complex SPF include chains into flat records using only 1 DNS lookup instead of many Continuously monitors email provider IP changes and updates your SPF record 24/7 automatically Improves email deliverability by up to 15% through proper SPF record management ISO 27001 and NEN 7510 certified hosting with GDPR compliance	Runs AI models locally on your device, not on company servers Email drafts match your personal writing style and tone Mail never uploaded to external AI providers
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	6 −1 (down) since last check
Trust Flow (Majestic)	3	4
Citation Flow (Majestic)	11	23
Referring domains (Majestic)	4	64

6 details filled in for both companies.

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