Is Constant Contact or Klaviyo more popular?

Klaviyo is used by more websites in our catalog: 551 use Constant Contact and 13,451 use Klaviyo.

Does Constant Contact or Klaviyo have higher-authority sites?

Constant Contact and Klaviyo sites have a similar median Ahrefs Domain Rating.

Is Constant Contact or Klaviyo growing faster?

Between 2026-06 and 2026-07, Constant Contact went from 0.06% to 0.06% of all tracked sites, while Klaviyo went from 2.0% to 1.5%. Constant Contact is gaining ground faster in our index.

Can a site use both Constant Contact and Klaviyo?

No. A site runs a single email / newsletter platform, so Constant Contact and Klaviyo are mutually exclusive.

Where does this Constant Contact vs Klaviyo data come from?

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.

Constant Contact vs Klaviyo — Site Stats Database

Constant Contact vs Klaviyo

A side-by-side comparison of two email & newsletter platforms, based on the 128,885 Email Marketing sites tracked by Site Stats Database.

Last updated July 1, 2026

Metric	Constant Contact	Klaviyo
Websites	551	13,451
Market share	0.43%	10%
Share of top 10K sites	0.05%	1.4%

Rank	#16	#4

Median DR	32	32

Average DR	34	32

Median keywords	1,413	1,741

Median referring domains	450	426

Median domain age	23 yrs	13 yrs

Average domain age	22 yrs	15 yrs

Average monthly traffic	66,577	76,721

Combined monthly traffic	36,683,852	1,031,969,412

constitutioncenter.org
LanguageEnglish
DR (Ahrefs)80
Total Keywords148,138
Referring Domains28,073
Domain Age29 yrs
Traffic (Jun 2026)7,621,258
Traffic Trend
TechnologyConstant Contact
womenshistory.org
LanguageEnglish
DR (Ahrefs)79
Total Keywords47,491
Referring Domains18,206
Domain Age17 yrs
Traffic (Jun 2026)3,101,291
Traffic Trend
Technology
specialolympicspa.org
LanguageEnglish
DR (Ahrefs)56
Total Keywords2,184
Referring Domains2,168
Domain Age26 yrs
Traffic (Jun 2026)1,399,729
Traffic Trend
Technology
fortworthstockyards.org
LanguageEnglish
DR (Ahrefs)69
Total Keywords17,055
Referring Domains3,610
Domain Age27 yrs
Traffic (Jun 2026)1,375,121
Traffic Trend
Technology
fdrlibrary.org
LanguageEnglish
DR (Ahrefs)73
Total Keywords17,948
Referring Domains6,183
Domain Age10 yrs
Traffic (Jun 2026)1,011,574
Traffic Trend
Technology
pathologyoutlines.com
LanguageEnglish
DR (Ahrefs)70
Total Keywords68,956
Referring Domains5,275
Domain Age24 yrs
Traffic (Jun 2026)731,795
Traffic Trend
Technology
visitsanjuans.com
LanguageEnglish
DR (Ahrefs)67
Total Keywords9,674
Referring Domains2,911
Domain Age22 yrs
Traffic (Jun 2026)699,588
Traffic Trend
Technology
constantcontact.com
LanguageEnglish
DR (Ahrefs)92
Total Keywords107,837
Referring Domains249,011
Domain Age27 yrs
Traffic (Jun 2026)670,180
Traffic Trend
Technology
boulderdowntown.com
LanguageEnglish
DR (Ahrefs)66
Total Keywords13,717
Referring Domains2,469
Domain Age24 yrs
Traffic (Jun 2026)575,660
Traffic Trend
Technology
wholegrainscouncil.org
LanguageEnglish
DR (Ahrefs)75
Total Keywords14,787
Referring Domains6,375
Domain Age23 yrs
Traffic (Jun 2026)543,608
Traffic Trend
Technology

Website	Language	DR (Ahrefs)	Total Keywords	Referring Domains	Domain Age	Traffic (Jun 2026)	Traffic Trend	Technology
constitutioncenter.org	English	80	148,138	28,073	29 yrs	7,621,258		Constant Contact

goldprice.org
LanguageEnglish
DR (Ahrefs)76
Total Keywords40,649
Referring Domains16,234
Domain Age22 yrs
Traffic (Jun 2026)14,000,940
Traffic Trend
TechnologyKlaviyo
christmasinamerica.com
LanguageEnglish
DR (Ahrefs)30
Total Keywords21,030
Referring Domains297
Domain Age3 yrs
Traffic (Jun 2026)7,840,049
Traffic Trend
Technology
provenwinners.com
LanguageEnglish
DR (Ahrefs)74
Total Keywords180,975
Referring Domains11,433
Domain Age28 yrs
Traffic (Jun 2026)7,262,857
Traffic Trend
Technology
visitphilly.com
LanguageEnglish
DR (Ahrefs)77
Total Keywords104,834
Referring Domains21,661
Domain Age26 yrs
Traffic (Jun 2026)6,683,452
Traffic Trend
Technology
shop.mattel.com
LanguageEnglish
DR (Ahrefs)84
Total Keywords101,009
Referring Domains15,292
Domain Age31 yrs
Traffic (Jun 2026)5,948,548
Traffic Trend
Technology
orvis.com
LanguageEnglish
DR (Ahrefs)77
Total Keywords131,555
Referring Domains15,027
Domain Age30 yrs
Traffic (Jun 2026)5,617,128
Traffic Trend
TechnologyKlaviyo
adriannapapell.com
LanguageEnglish
DR (Ahrefs)70
Total Keywords126,741
Referring Domains3,645
Domain Age26 yrs
Traffic (Jun 2026)5,470,030
Traffic Trend
Technology
katzsdelicatessen.com
LanguageEnglish
DR (Ahrefs)70
Total Keywords10,510
Referring Domains4,755
Domain Age15 yrs
Traffic (Jun 2026)4,364,889
Traffic Trend
Technology
historyhit.com
LanguageEnglish
DR (Ahrefs)73
Total Keywords230,590
Referring Domains11,360
Domain Age11 yrs
Traffic (Jun 2026)4,095,352
Traffic Trend
Technology
petalandpup.com
LanguageEnglish
DR (Ahrefs)58
Total Keywords105,609
Referring Domains2,592
Domain Age7 yrs
Traffic (Jun 2026)3,966,604
Traffic Trend
Technology