| Price from | $4.17/mo | $49/mo |
| Free plan | — | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 7 | 3 |
| Spec score · Sales Engagement Software | 8.8 (#6) | 7.2 (#62) |
| Spec score · Cold Email Software | 9.0 (#4) | 7.2 (#35) |
| API | Klenty documents a REST API that uses a unique API key and JSON as its primary data format. | API access is included in the Growth plan. |
| Headquarters | California | Stevenage, Hertfordshire, United Kingdom |
| Personalization | Official feature pages list video personalization and Liquid Templates for dynamically varying outreach content. | Up supports personalized emails and email sequences for prospecting and newsletters. |
| Product | Klenty describes itself as a sales engagement platform built for phone-first SDR teams. | Up is an email outreach tool for small businesses that sends and automates email at scale using Amazon SES. |
| Reporting | Reports are positioned for optimizing outreach and measuring performance. | Campaign reporting tracks open, click, and bounce rates. |
| Support | The pricing FAQ says customer support is available 24/5 and responds within 2.5 minutes. | The Custom plan includes Amazon SES setup and priority phone support. |
