| Price from | $4.17/mo | $9/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Plans published | 7 | 3 |
| Spec score · Email Tracking Software | 9.0 (#10) | 8.1 (#19) |
| Headquarters | California | 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ, United Kingdom |
| Personalization | Official feature pages list video personalization and Liquid Templates for dynamically varying outreach content. | Users import contacts from CSV and personalize messages with merge tags such as {{FirstName}} and {{Company}}. |
| Product | Klenty describes itself as a sales engagement platform built for phone-first SDR teams. | OutMass is a Chrome and Edge extension that adds mail merge and mass email to Outlook on the web. |
| Security | Klenty’s pricing FAQ says the platform is SOC 2 Type II certified and GDPR-compliant. | The privacy policy states that OutMass uses HTTPS/TLS, secure OAuth token storage, access controls, authentication, and regular security reviews. |
| Support | The pricing FAQ says customer support is available 24/5 and responds within 2.5 minutes. | Pro includes priority support, and the listed support email is [email protected]. |
