Email Detective — ESP Tracker

ESP	Category	Brands	Brand share	Observations	Obs share
Klaviyo	marketing	1523	16.7%	9,263	14.0%
Mailchimp	marketing	980	10.8%	3,739	5.6%
Salesforce MC	marketing	908	10.0%	6,161	9.3%
HubSpot	marketing	750	8.2%	4,745	7.2%
Braze	marketing	403	4.4%	3,050	4.6%
Iterable	marketing	398	4.4%	6,787	10.2%
Kit	marketing	396	4.3%	3,023	4.6%
Brevo	marketing	377	4.1%	1,963	3.0%
Substack	marketing	348	3.8%	1,655	2.5%
ActiveCampaign	marketing	267	2.9%	1,685	2.5%
Customer.io	marketing	252	2.8%	2,866	4.3%
Beehiiv	marketing	226	2.5%	3,559	5.4%
MailerLite	marketing	212	2.3%	802	1.2%
Marketo	marketing	166	1.8%	1,310	2.0%
Bloomreach	marketing	143	1.6%	1,516	2.3%
Shopify Messaging	marketing	140	1.5%	1,264	1.9%
Omnisend	marketing	137	1.5%	851	1.3%
Seguno	marketing	136	1.5%	1,209	1.8%
Adobe Campaign	marketing	129	1.4%	1,129	1.7%
Emarsys	marketing	112	1.2%	544	0.8%
Smaily	marketing	93	1.0%	430	0.6%
Sailthru	marketing	83	0.9%	1,350	2.0%
Campaign Monitor	marketing	67	0.7%	373	0.6%
Dotdigital	marketing	64	0.7%	260	0.4%
Acoustic	marketing	61	0.7%	315	0.5%
Keap	marketing	53	0.6%	351	0.5%
Yespo	marketing	53	0.6%	346	0.5%
Responsys	marketing	52	0.6%	311	0.5%
Constant Contact	marketing	49	0.5%	484	0.7%
SALESmanago	marketing	46	0.5%	118	0.2%
Selligent	marketing	39	0.4%	124	0.2%
Sendy	marketing	39	0.4%	112	0.2%
Drip	marketing	36	0.4%	225	0.3%
Kajabi	marketing	34	0.4%	379	0.6%
Deployteq	marketing	33	0.4%	186	0.3%
CleverReach	marketing	31	0.3%	230	0.3%
Oracle Eloqua	marketing	30	0.3%	153	0.2%
SendPulse	marketing	29	0.3%	95	0.1%
CleverTap	marketing	28	0.3%	126	0.2%
Loops	marketing	28	0.3%	77	0.1%
Zoho Campaigns	marketing	26	0.3%	86	0.1%
AWeber	marketing	25	0.3%	191	0.3%
EmailOctopus	marketing	24	0.3%	68	0.1%
Cordial	marketing	24	0.3%	354	0.5%
GetResponse	marketing	23	0.3%	75	0.1%
Squarespace	marketing	21	0.2%	63	0.1%
Sarbacane	marketing	21	0.2%	405	0.6%
Ometria	marketing	19	0.2%	123	0.2%
Spotler	marketing	18	0.2%	59	0.1%
Edrone	marketing	18	0.2%	26	<0.1%
MDirector	marketing	17	0.2%	54	0.1%
Systeme.io	marketing	16	0.2%	33	<0.1%
rapidmail	marketing	16	0.2%	133	0.2%
Ghost	marketing	15	0.2%	138	0.2%
Bluecore	marketing	15	0.2%	58	0.1%
Flodesk	marketing	15	0.2%	28	<0.1%
Microsoft Dynamics	marketing	14	0.2%	42	0.1%
Bento	marketing	13	0.1%	57	0.1%
Wix	marketing	13	0.1%	74	0.1%
Emma	marketing	13	0.1%	36	0.1%
Encharge	marketing	11	0.1%	33	<0.1%
Inxmail	marketing	11	0.1%	100	0.2%
Connectif	marketing	11	0.1%	17	<0.1%
Kartra	marketing	9	0.1%	21	<0.1%
EcoSend	marketing	9	0.1%	29	<0.1%
ExpertSender	marketing	8	0.1%	35	0.1%
ActiveTrail	marketing	7	0.1%	20	<0.1%
KlickTipp	marketing	7	0.1%	51	0.1%
Pardot	marketing	7	0.1%	48	0.1%
Airship	marketing	6	0.1%	121	0.2%
Benchmark	marketing	6	0.1%	140	0.2%
Userlist	marketing	6	0.1%	34	0.1%
Moosend	marketing	6	0.1%	18	<0.1%
SAP Marketing Cloud	marketing	5	0.1%	10	<0.1%
Listrak	marketing	5	0.1%	19	<0.1%
Revinate	marketing	5	0.1%	6	<0.1%
Blackbaud	marketing	4	<0.1%	7	<0.1%
XCAMPAIGN	marketing	4	<0.1%	10	<0.1%
SendFox	marketing	3	<0.1%	14	<0.1%
Vero	marketing	3	<0.1%	9	<0.1%
Agnitas	marketing	3	<0.1%	38	0.1%
Ecomail	marketing	3	<0.1%	3	<0.1%
Magnews	marketing	3	<0.1%	20	<0.1%
OneSignal	marketing	3	<0.1%	6	<0.1%
mailingwork	marketing	3	<0.1%	4	<0.1%
dEngage	marketing	3	<0.1%	6	<0.1%
Retail Rocket	marketing	2	<0.1%	10	<0.1%
Optimizely Campaign	marketing	2	<0.1%	6	<0.1%
Mailcoach	marketing	2	<0.1%	34	0.1%
WombatMail	marketing	2	<0.1%	45	0.1%
Pipedrive	marketing	2	<0.1%	5	<0.1%
Positive User	marketing	2	<0.1%	31	<0.1%
Kajomi	marketing	1	<0.1%	2	<0.1%
Newsletter2Go	marketing	1	<0.1%	1	<0.1%
Easymailing	marketing	1	<0.1%	1	<0.1%
Creatio	marketing	1	<0.1%	2	<0.1%
MailPoet	marketing	1	<0.1%	2	<0.1%
Robly	marketing	1	<0.1%	2	<0.1%

98 ESPs shown. Click any name for the full detail page (placement, infrastructure, brands, IPs).

About the share columns: Brand share = % of brands in the current filter that use this ESP (sums to >100% because brands often use multiple ESPs). Obs share = % of total send volume from this ESP. Each "observation" is one email an Email Detective user opened. Both are share-of-inbox among our users — not global market share. Sample is biased toward our user demographic and what they actually open.