Clerk vs Postmark

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

Clerk compared with Postmark
Detail	Clerk	Postmark
What it does	Not given	Fast, Reliable Email Delivery Service
Stage	Established	Established
Founded	Not given	2010
Based in	Not given	Not given
Pricing model	freemium	freemium
Pricing	Not given	Free plan with 100 emails/month. Paid plans starting at $15/month for 10,000 emails, with additional tiers at $16.50/month and $18/month. Extra emails charged at $1.80-$1.20 per 1,000 depending on plan.
Key features	Social sign-on with 20+ providers	Email API SMTP Service Message Streams Email Templates Inbound Email processing Analytics & webhooks Email open and link tracking Bulk API
What makes it different	Generous free tier with 50,000 MRU at no cost MRU pricing model that doesn't count first-day users SOC 2 Type 2 and CCPA compliant with regular third-party audits	Industry-leading delivery speed, up to 4x faster than other providers Stellar deliverability without requiring dedicated IP Knowledgeable customer support included with all plans
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	87 no change since last check	85 no change since last check
Trust Flow (Majestic)	34	44
Citation Flow (Majestic)	55	54
Referring domains (Majestic)	9179	8026

4 details filled in for both companies.