Neutral mentions of Thinkific

For the offer you described—high-ticket coaching + live calls + community + 1:1 + cohort scarcity + payment plans + upsells—I’d shortlist these:

Kajabi

Kajabi is probably the closest match to your exact model. Its coaching product supports 1:1 and group coaching, while its offers support upsells, bundled offers, one-time payments, recurring payments, and payment plans. It also has native community functionality. Kajabi Kajabi Kajabi

You could structure something like:

$10,000 Core Cohort

• 12-week program
• Weekly live group call
• Private community
• Curriculum/resources
• Cohort-specific access

Then offer:

Upsell → $15,000 VIP

• Everything above
• 6 × private 1:1 calls
• Priority feedback
• Private VIP space

And sell either as $10,000 upfront or a defined payment plan. Kajabi explicitly supports upsells and payment-plan pricing. Kajabi Kajabi

Circle

Circle is particularly compelling if the community itself is central to the product. Its paywalls support one-time purchases, subscriptions, and installment plans, and you can control access to particular spaces. Circle Circle

For example:

• Cohort A → Community + weekly calls
• Cohort B → Community + calls + additional spaces
• VIP → Everything + 1:1 coaching
• Installment plan → e.g. 6 monthly payments

The tradeoff is that Kajabi is more of an integrated sales/marketing/coaching business platform, whereas Circle is especially strong as the member/community experience.

Thinkific

Thinkific has strong commerce functionality, including payment plans, bundles, upsells and order bumps, plus communities and cohort-style learning. Thinkific Thinkific Support

I'd lean toward it if your program is fundamentally a structured educational curriculum with coaching layered on top, rather than a coaching business where the relationship/community is the core product.

What I'd use for your model

Kajabi is the cleanest single-platform setup if you want:

Sales page → application/checkout → payment plan → cohort access → community → live calls → 1:1 upgrade → next-offer upsell

It specifically supports packaging coaching, community and other products into offers, which reduces the number of systems you'd have to stitch together. Kajabi Kajabi

If your community experience is the differentiator, I'd investigate Circle alongside it. If your program is primarily course/curriculum driven, Thinkific becomes more compelling.

If you tell me your expected price point (e.g. $3k, $10k, $25k+) and whether clients apply before purchasing, I can map out the exact platform + funnel + payment-plan structure I'd use.

For your model—cohort-based enrollment + limited seats + private 1:1 upsells—I’d shortlist these:

Kajabi

Kajabi is probably the closest match if your business is essentially “small cohort + optional premium access to me.”

Kajabi now has native cohort-based courses with scheduled content and live sessions. Kajabi Kajabi

More importantly for your upsell model, its Coaching product supports 1:1 and group coaching, scheduling, live sessions, and client management. It also has an Additional Session Purchase feature, so a cohort member can purchase extra 1:1 sessions without repurchasing the whole program. Kajabi Kajabi

It also has Backstage, which creates a separate private workspace for an individual client—useful if your 1:1 add-on is more substantial than just a coaching call. Kajabi

kajabi.com

Maven

Maven is worth considering if the cohort itself is the product rather than a course with coaching attached.

Maven has explicit private-cohort functionality, including direct purchase links for a particular cohort and seat management. Maven Help Center

The tradeoff is that your private 1:1 layer isn't as natively integrated as Kajabi's coaching/additional-session setup, so you may end up pairing it with a scheduling/payment workflow.

maven.com

Thinkific

Thinkific is a good option if you want more granular control and don't mind configuring the workflow yourself.

It doesn't currently have a simple numeric “maximum 12 students” enrollment setting; Thinkific recommends making the product private once you've hit your desired limit. Thinkific It does support private products, manual/bulk enrollment, groups, communities, and coaching products. Thinkific Thinkific

thinkific.com

For your exact setup, I'd lean Kajabi if the 1:1 add-on is an important revenue stream. The architecture can be roughly:

Cohort offer → limited seats → cohort access → optional “add 1:1” offer → private coaching relationship

If your “cohort access keys” specifically means unique invite/access codes that you hand out individually, rather than ordinary checkout links, that's an important distinction—I can narrow this down to platforms that support unique/redeemable cohort keys + hard seat caps + private 1:1 upsells.