OptinMonster vs OptiMonk: Rules You Set or an AI Agent

The short answer: a store under 10,000 pageviews a month can run OptiMonk free, with the AI agent, A/B tests and a no-popup holdout included (OptiMonk pricing, checked on 26 October 2026). Above that, the comparison is OptiMonk's Essential, from $19 a month paid yearly for 20,000 to 50,000 pageviews, against OptinMonster, where Exit-Intent arrives with Pro at $444 for the first year (OptinMonster pricing). Choose OptinMonster if your job is setting display rules by hand across several sites; choose OptiMonk if your job is getting branded store popups drafted by an agent you brief in a sentence.

Disclosure: I may earn a commission through some links on this site. It does not change what this page says.

What sets each bill:

1. Run your traffic through both meters. OptiMonk counts every page load that carries its code, popup or not; OptinMonster counts campaign impressions but recommends 20 to 30% more impressions than pageviews (OptiMonk pricing FAQ, OptinMonster pricing FAQ). For example, at 40,000 pageviews OptiMonk lands in Essential's band, which starts at $228 a year paid upfront, while OptinMonster's sizing rule gives 40,000 x 1.2 = 48,000 to 40,000 x 1.3 = 52,000 impressions: past Pro's 25,000 and into Growth, $804 for the first year. Run campaigns on a fraction of your pages and that impression count falls.
2. Add VAT if you buy from the EU. OptiMonk is based in Hungary and charges 27% VAT to EU customers without a valid VAT number, so that $228 becomes $228 x 1.27 = $289.56 (OptiMonk pricing FAQ).
3. Check the checkout you already run. OptinMonster's Revenue Attribution, from Pro, does not work on newer Shopify stores or those on the updated checkout, because Shopify restricts third-party scripts on the thank-you page (attribution guide).
4. Plan the measurement before the popup. A share of visitors who see nothing is the only fair comparison; the popup holdout use case sets one up step by step.

Point by point

Three differences that decide it

Who does the building

OptinMonster hands you the builder and a rule book that opens tier by tier: time and scroll rules on Basic, device on Plus, Exit-Intent, referrer, cookie and scheduling on Pro, geolocation and returning visitors on Growth (display rules). OptiMonk hands you an agent. You describe the popup, it shows four concepts and builds the one you pick in about three minutes (AI assistants). A team with a designer and firm opinions on layout will feel at home in the first; a store without one will get further with the second.

Which meter follows your traffic

Because OptiMonk bills page loads, a site where visitors read five pages per visit spends five pageviews on each of them even if one popup shows once. OptinMonster bills the popup's appearances, so a single exit campaign on a busy blog is cheaper to meter there. At OptiMonk's limit, campaigns pause after a warning at 80%; at OptinMonster's, the account moves up a tier and campaigns keep running (OptiMonk pricing FAQ, OptinMonster pricing FAQ).

What "it worked" means in the report

OptinMonster's Revenue Attribution shows the revenue an individual campaign has contributed from your store's sales (attribution guide). OptiMonk measures uplift against a baseline variant, the holdout if you add one, with a Bayesian chance to win that needs a reasonable amount of data (variants guide). The first credits sales to a campaign. The second compares the popup with visitors who saw nothing, which is the only way to see what it changed.

Prices, rung by rung

USD, checked on 26 October 2026 on the OptiMonk pricing page (excluding VAT, yearly paid upfront, refunds within 14 days of the first payment) and OptinMonster's annual and monthly pages (first-year prices renew at full price).

The agent step, and the person who publishes

In Claude, add a custom connector, paste OptiMonk's link, agentic.optimonk.com/mcp, sign in and choose what Claude may do before you click Allow (AI assistants). Then brief it as you would a designer: "Build an exit-intent popup that saves the email of anyone leaving without buying, 10% off, in the store's brand colours." The agent asks what it needs, shows concepts and leaves a draft in OptiMonk.

The human check sits in two places. At connection, leave publishing off, because OptiMonk's pricing page says the MCP server can publish as well as build. At launch, a person opens the draft on desktop and mobile, reads the offer against the discount code that exists in the store, and switches it on. On OptinMonster the AI step is smaller: five rewrites of a headline, and you choose one.

A comparison page that scores itself

OptiMonk publishes its own OptiMonk vs OptinMonster page and awards itself five of six categories, conceding only template count. It was written to win the reader who searches this pair, which is you; borrow its questions, then check every answer on OptinMonster's own pricing page.

Choose OptinMonster if

• Your job is building many campaigns by hand with referrer, cookie, scheduling or geolocation rules (display rules).
• Your site is content-heavy and one campaign appears on a small share of pageviews.
• You want revenue per campaign on WooCommerce or an older Shopify checkout.

Choose OptiMonk if

• Your job is getting on-brand store popups drafted fast by an agent, with a person approving.
• You want a free plan to run a real test, holdout included.
• You need several features OptinMonster keeps for Pro or Growth, at the Essential price.

Reading the popup against everything else

The holdout answers what one popup changed. If the harder question is what each channel changed, measured the same way against people who were not exposed, that check can run continuously in a causal attribution tool such as Causality Engine (disclosure: I founded it).

FAQ

Does OptiMonk charge for the agent?

No. The agent is in every plan, Free included, and draws on the plan's monthly AI credits; more credits come with a larger plan (pricing FAQ).

Does OptinMonster's Revenue Attribution work on Shopify?

Not for newer Shopify stores or stores on the updated checkout, where Shopify restricts third-party scripts on the order pages (attribution guide).

Which suits a blog rather than a store?

OptinMonster, usually. OptiMonk describes itself as the popup agent for ecommerce and counts every page load (OptiMonk pricing), while OptinMonster counts only the times a campaign is seen.