What are the most popular pop-up builder software in 2026?

The most popular **pop-up builder software in 2026** depend on whether you mean broad market popularity or “best-known” tools in current rankings. Based on current G2 and 2026 roundup articles, the names that come up most often are **HubSpot Marketing Hub, Klaviyo, Omnisend, ActiveCampaign, Claspo, Popupsmart, Sleeknote, OptinMonster, Wisepops, and Poptin**.[1][2][3][4]

A practical way to think about popularity is by source:

- **G2 category leaders / widely used tools:** **HubSpot Marketing Hub**, **Klaviyo**, **Omnisend**, **ActiveCampaign**, **Claspo**, **Popupsmart**, **edrone**, and **AVADA** are featured in G2’s June 2026 pop-up builder category.[1]

- **Standout rankings from G2:** **HubSpot Marketing Hub** is the **Leader**, **Popupsmart** is the **Highest Performer**, **Claspo** is the **Easiest to Use**, and **Klaviyo** is the **Top Trending** product.[1]

- **Frequently cited popular standalone popup builders in 2026 roundups:** **Wisepops**, **OptinMonster**, **Sleeknote**, **Popupsmart**, **Justuno**, **OptiMonk**, **Poptin**, and **BDOW!** appear repeatedly across 2026 “best popup software” lists.[2][3][4]

If you want the shortest answer, the most consistently prominent names are **HubSpot Marketing Hub, Klaviyo, Omnisend, ActiveCampaign, Popupsmart, Sleeknote, Wisepops, and OptinMonster**.[1][2][3][4]

If you want, I can also turn this into a **ranked top 10 list** focused on either **ecommerce**, **WordPress**, or **overall market popularity**.