Email Detective — ESP Tracker

Constant Contact

Email Marketing Platform

Email marketing with event tools. Free trial available.

Industries using Constant Contact

Distribution of brands using Constant Contact by industry. Helps you gauge whether this ESP is popular with businesses similar to yours. Brands tagged in two industries are counted in both.

Based on 34 of 49 brands tagged (69% coverage). Industries assigned automatically using AI; not every brand is tagged yet.

Average placement for brands using Constant Contact

Where this ESP's emails land in Gmail. Each brand counted once (average of per-brand percentages) so a single high-volume sender can't dominate. Spam placement is mostly driven by the sender (list quality, content, complaint rate). This number reflects both the ESP's infrastructure AND the kind of senders who choose it — not just deliverability quality.

By volume: inbox 502 · promotions 35 · spam 10 (547 emails observed)

Percentages are averaged per brand (each counted once) across 12 brands using Constant Contact with at least 5 placement observations each.

Powered by

Underlying transactional infrastructure Constant Contact routes through, detected from the sender hostname (PTR record) on each email's Received header. Bigger sample → more accurate.

• Amazon SES 7 of 49 brands
• SendGrid 4 of 49 brands
• SparkPost 2 of 49 brands

Sending IPs (top 25)

IPs we've observed sending via Constant Contact. "Brands" = distinct brands seen on each IP; "Placement" = where those emails landed in Gmail (inbox / promotions / spam). Click "reputation" to check the IP on Cisco Talos.