Companies Using OptinMonster

Here's what stands out about OptinMonster after analyzing its real-world deployment across our 39,566+ tracked domains.

1. Growth Trajectory

OptinMonster went from 2 active domains in October 2013 to nearly 39,776 by March 2025. That's a steep climb for a WordPress plugin that expanded into a standalone SaaS. The sharpest growth window ran from 2019 to 2022, when active domains grew from about 3,500 to 19,000. The pandemic played a role: businesses that had never invested in email list building suddenly needed it. OptinMonster's WordPress roots and template-heavy approach made it an easy first choice for those new adopters.

Sales Signal: A platform with nearly 40K active domains and 271K+ previously used domains represents a large, active addressable market. The previously-used pool is especially interesting: these 271,638 sites tried OptinMonster and moved on. They already understand popup-based lead capture. Any vendor offering complementary tools (CRM, email automation, analytics) can target these warm leads who are familiar with the workflow.

2. Customer Profile

OptinMonster's customer base is overwhelmingly small. 75.1% of customers have 1-10 employees, and another 15.8% fall in the 11-50 range. Combined, over 90% of the user base is SMB. The age distribution reinforces this: 40.62% of OptinMonster customers were founded in the 2010s, and 25.12% in the 2020s. These are young, digitally-native businesses. That said, enterprise outliers exist: Delta Air Lines, Intuit, Fortinet, and Booking.com all show active OptinMonster deployments, typically on subdomains or campaign-specific pages rather than their primary sites.

Sales Signal: The 90%+ SMB concentration tells you these companies are resource-constrained. They don't have in-house marketing ops teams. Products that reduce complexity (pre-built integrations, done-for-you templates, bundled email+popup stacks) will resonate. The enterprise deployments on subdomains suggest a different sell: position your tool as the next step when OptinMonster can't handle business-grade personalization or compliance requirements.

3. Industry & Geographic Concentration

The industry spread is remarkably flat. Advertising Services leads at just 4.12%, with Retail (4.04%), Business Consulting (3.83%), and Construction (3.62%) close behind. No vertical exceeds 4.2%, making OptinMonster a genuinely horizontal tool. Geographically, the United States accounts for 47.1% of the customer base, followed by the United Kingdom at 10.9% and Brazil at 9.2%. English-speaking markets together hold 66.8% of adoption. Brazil's strong showing at #3 likely reflects OptinMonster's Portuguese-language support and WordPress's deep penetration in South America.

Sales Signal: The flat industry distribution means you can prospect into virtually any vertical. Don't limit outreach to "marketing" or "ecommerce" companies. Construction, real estate, medical practices, and financial services all show up in the top 15 industries. For geographic targeting, Brazil and India represent emerging growth pockets where competition from premium popup tools (Wisepops, OptiMonk) is thinner.

4. Migration Patterns

The biggest migration story is the 2,174 companies lost to Smart App Banner versus only 467 gained, a 4.7:1 loss ratio. This makes sense: Smart App Banner serves mobile app install prompts, a different use case entirely. Sites adding mobile app banners aren't "leaving" OptinMonster so much as adding a separate tool. Against direct competitors, OptinMonster holds its ground: it gained 527 companies from Popup Builder while losing only 355, and gained 399 from Hello Bar against just 109 lost. The Hello Bar ratio (3.7:1 in OptinMonster's favor) signals that OptinMonster consistently wins users away from simpler notification bar tools.

Sales Signal: Two opportunities emerge. First, the 355 companies that left OptinMonster for Popup Builder likely switched because of price (Popup Builder has a free tier). If you're selling a premium tool, target OptinMonster users who haven't yet churned but show signs of budget sensitivity. Second, the 399 Hello Bar migrants already understand that basic notification bars aren't enough. They're primed for more advanced segmentation, exit-intent, and A/B testing features.

5. Technology stack

OptinMonster's tech stack overlap reveals a WordPress-centric user base. Elementor appears on 41.96% of OptinMonster sites, with Elementor Pro at 24.2%. Yoast SEO Premium runs on 53.81%. WPForms (69.34%) and Contact Form 7 (17.93%) handle the form side. For analytics, Google Tag Manager (84.45%) and Google Analytics (80.68%) are near-universal. About 20.38% run WooCommerce, meaning one in five OptinMonster users also sells products online. Facebook Pixel (28.33%) and Google Remarketing (23.34%) round out the advertising stack.

Sales Signal: The heavy WordPress/Elementor overlap tells you these users build pages visually and expect drag-and-drop interfaces. The 20% WooCommerce overlap flags an ecommerce segment that needs cart abandonment, upsell popups, and checkout-specific triggers. The relatively low Facebook Pixel adoption (28%) compared to Google Analytics (80%) suggests many OptinMonster users haven't set up retargeting yet. That's a gap any ad tech or retargeting vendor can exploit.

G2 Review Signals

G2 reviews echo what our data reveals about user experience. The standout positive is ease of use (7 mentions), reinforcing the platform's appeal. The biggest gripe? complex features (2 mentions). Prospect conversations should anticipate this objection.

6. Key Takeaways

OptinMonster occupies a strong #2 position in the Popups & Lead Capture category with a 2.98% market share. Its core customer is a micro-business with 1-10 employees, founded after 2010, based in the US, running a WordPress site with Elementor and Google Analytics. The platform has proven staying power with nearly 40K active domains and a rich migration history that shows it consistently wins against simpler bar/notification tools. The main competitive pressure comes from free alternatives (Popup Builder) and the orthogonal Smart App Banner category. For sales teams, OptinMonster's customer list is a strong prospecting target: these businesses already invest in conversion improvement and are likely using adjacent tools like WPForms, MonsterInsights, and WooCommerce.

7. Sales Applications

Prospecting template: "I noticed your site runs OptinMonster along with WPForms and Google Analytics. Our data shows 69% of OptinMonster users rely on WPForms for lead capture, but many aren't connecting those form submissions to a CRM or email sequence. We help bridge that gap with [your product], which integrates directly with both tools."

Targeting strategy: Filter TechnologyChecker.io for domains using OptinMonster + WooCommerce (20% overlap) to find ecommerce sites that need cart abandonment and checkout refinement tools. These businesses already believe in popup-based conversion, so the adoption barrier is low.

Competitive angle: The 355 companies that switched from OptinMonster to Popup Builder in the last year did so primarily for cost reasons. If your tool offers a free tier or competitive pricing, reference this migration trend. If your tool is premium, target the 527 companies that upgraded from Popup Builder to OptinMonster. They chose features over price once and may do so again for your product.

Explore the full OptinMonster customer list, industry breakdowns, and migration data on TechnologyChecker.io, covering 39,566 detected domains and 25,973 enriched company profiles.

Customer Reviews (G2)

Customer Sentiment: G2 reviewers cite ease of use (7 mentions) as the top strength, while complex features (2 mentions) as the most common complaint. Users also value user-friendly interface (4 mentions). Secondary concerns include pricing expensive (2 mentions). The positive-to-negative mention ratio of 3.0:1 indicates strong overall satisfaction.