Email marketing, by the numbers
The state of email marketing, measured from real campaigns
Inbox Archive detects the email service provider, tracking and personalization tech, and campaign type behind every email it stores. Across 110 brands and 1,763 real campaigns, here is what the stack and tactics actually look like, measured from live sends and updated as new mail lands (current as of August 7, 2026).
Which email service providers brands actually use
Klaviyo is the most-used ESP among archived brands: 50 of 110 (45%) send with it. A brand can appear under more than one provider when it sends from several.
Share of campaigns by ESP
- Klaviyo 44%
- Salesforce Marketing Cloud 21%
- Mailgun 9%
- Braze 8%
- Iterable 5%
- SparkPost 4%
- Other 8%
Brands using each provider
Tracking & personalization tech
Beyond the sending ESP, Monetate is the most common add-on layer, found in emails from 3 brands.
What brands actually send
The most common campaign type is Promotions & Sales (39% of all campaigns).
Tactics & techniques
7% of campaigns carry a promo code (124 campaigns from 35 brands). How often each rendering technique shows up:
- 2%
- Dynamic / open-time content
- 10%
- A dark-mode variant
- 25%
- Animated GIFs
- 7%
- A promo code
How this is measured
Every figure comes from real emails captured in Inbox Archive, not surveys. The ESP is detected from message headers and sending infrastructure; tracking and personalization tech from asset and click domains in the HTML; campaign type and promo codes from the email content itself. Figures cover 1,763 published campaigns from 110 brands sent between Jun 2026 and Aug 2026, and refresh as new mail is archived. Browse the underlying data by provider, tracking tech, or campaign type.