| HubSpot | 1,146 | https://www.hubspot.com |
| OneSignal | 818 | https://onesignal.com |
| MailChimp | 773 | https://mailchimp.com |
| Klaviyo | 727 | https://www.klaviyo.com/ |
| ActiveCampaign | 145 | https://www.activecampaign.com |
| Constant Contact | 134 | https://www.constantcontact.com |
| Sailthru | 128 | https://www.sailthru.com |
| Eloqua | 122 | https://eloqua.com |
| Dreamdata | 114 | https://dreamdata.io |
| Izooto | 108 | https://www.izooto.com |
| 6sense | 97 | https://6sense.com |
| Sendinblue | 91 | https://www.sendinblue.com |
| Sophi | 78 | https://www.mathereconomics.com/sophi-start |
| Campaign Monitor | 65 | https://www.campaignmonitor.com |
| Emarsys | 61 | https://emarsys.com/ |
| Mindbox | 56 | https://mindbox.ru |
| Marketo | 53 | https://www.marketo.com |
| Hyperia | 52 | https://www.hyperia.sk |
| RD Station | 45 | https://rdstation.com.br |
| Storylane | 43 | https://www.storylane.io |