Kajabi charges a serious monthly subscription before you make a single sale, and Constants was built around the opposite bet, so the two only make sense side by side once you know your actual sales volume.

How Kajabi's Pricing Works

Kajabi has no free plan. Basic runs $179/month ($143/month billed annually), Growth is $249/month ($199 annually), and Pro is $499/month ($399 annually), after a 30-day free trial. Using Kajabi's own payment processor costs 2.9% + $0.30 on Basic, dropping to 2.7% + $0.30 on Pro. Route payments through a third-party processor instead and Kajabi adds its own cut on top: 2% on Basic, 1% on Growth, 0.5% on Pro.

How Constants' Pricing Works

Constants has a free plan and a flat 6% fee on every sale, on every plan. There's no monthly commitment to make before you've sold anything, and no tier to pick between. If you don't sell, you don't pay.

The Real Math: Where the Fee Crosses the Subscription

Kajabi Basic's $179/month equals 6% of about $2,983 in sales. Below roughly $3,000/month in course or product revenue, Constants' flat 6% costs less than Kajabi's cheapest plan alone, before Kajabi's own processing fees are even added. Above that volume, and especially on Growth or Pro, Kajabi's flat cost can beat a percentage fee once sales are consistent.

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What Kajabi Does That Constants Doesn't

Kajabi is a full course platform: multi-module curriculum builders, quizzes and drip content, email marketing automation, a website builder, and up to 100,000 contacts on Pro. If you're running a structured course business at real scale, that infrastructure is the actual product you're paying for, not just a shop.

Pick Kajabi If, Pick Constants If

Pick Kajabi if you're building a full multi-module course business doing $3,000 or more a month and need email automation and a dedicated website to run it. Pick Constants if you're starting out, don't want a monthly bill before your first sale, or want bookings, events, memberships, and agent access sitting on the same link as your shop.

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See the full plan breakdown on the constants pricing page.


For how Constants stacks up against the rest of the field, not just Kajabi, see the full comparison of link-in-bio tools.