Shopify alternative · Private beta
Commerce that
runs itself.
CartKit is the storefront platform with an operator built in. Agents handle pricing, restocks, supplier dispatch and margin. You decide what to sell.
Opening to 50 stores in Q4 2026.
Northbound Supply
3 agents active · last run 09:12The gap
A storefront is not a business.
Every platform will sell you a checkout and a theme. None of them will tell you that the hoodie you're promoting stopped being profitable three weeks ago, when your supplier raised the blank by a dollar forty. That part is still a person with a spreadsheet at eleven at night.
It watches the numbers
Supplier costs, payment fees, refunds and shipping land against the order that caused them. Contribution margin is a column, not a spreadsheet you rebuild each month.
It does the work
Repricing when a supplier moves. Reordering before you run dry. Rerouting when a facility backs up. You write the rule once, in a sentence, and it holds.
It shows its work
Every action is logged with the reason, the number that triggered it and a one-click undo. Nothing changes your prices at 3am without leaving a note.
Margin engine
Know what each variant actually earns.
Most stores measure revenue because revenue is easy. CartKit carries the cost side all the way through: what the supplier charged, what shipping cost, what the processor took, what came back as a refund — attached to the order that caused it.
- Immutable cost snapshots. The cost at the moment of sale, not today's price list.
- Late costs restate. A fee or refund that settles next week corrects its original order.
- Loss-makers surface early. Negative contribution is flagged the day it turns, not at quarter end.
Contribution by variant
Sep 2026 · USD| Variant | Units | Revenue | Cost | Ship | Fees | Contribution |
|---|---|---|---|---|---|---|
| Ridgeline Hoodie — Ash / L RDG-HOD-ASH-L |
148 | $8,732 | $3,552 | $1,184 | $262 | $3,734 |
| Tidewater Mug — 15oz TDW-MUG-15 |
412 | $7,004 | $2,884 | $1,648 | $210 | $2,262 |
| Foldaway Tote — Natural FLD-TOT-NAT |
96 | $2,304 | $1,152 | $480 | $69 | $603 |
| Harbor Cap — Navy HRB-CAP-NVY |
63 | $1,449 | $756 | $315 | $43 | $335 |
| Solstice Poster — 18×24 SOL-PST-1824 |
37 | $703 | $444 | $296 | $21 | −$58 |
| Total | 756 | $20,192 | $8,788 | $3,923 | $605 | $6,876 |
Standing instructions
Tell it the rule once.
No trigger builder, no branching canvas. You describe how you want the store run in ordinary sentences, and those instructions become the standing behaviour — versioned, auditable and switchable off in one click.
- Bounded by default. Price floors, reorder budgets and approval gates you set.
- Every action explained. What changed, why, and the number behind it.
- Reversible. One click restores the previous state, including the price.
Standing instructions
plain language · versionedHold contribution above $2.00 a unit. Reprice within 24h of a supplier cost change. Never cut below cost. on
Reorder at 14 days of cover. Prefer the supplier with the shorter lead time when cost is within 8%. on
Route EU orders to an EU facility. Switch supplier if the backlog passes 48 hours. on
Pause any ad set whose CAC exceeds target for two days running. Ask before raising a budget. on
Every action is logged, attributed and reversible.
Multi-store
One catalog. As many storefronts as you need.
Run a brand per niche, per market or per channel without running four subscriptions and four admin panels. Products, suppliers and cost history are shared; pricing, domain, currency and rules stay separate.
- Shared catalog. One product record, listed at different prices per store.
- Per-store rules. A test brand can run loose while your main store runs tight.
- Consolidated margin. Profit by store, by variant, or across the whole account.
Stores
one account · shared catalog| Store | Revenue 30d | Margin | Agents |
|---|---|---|---|
| Northbound Supply northbound.co |
$20,192 | 34.1% | 3 on |
| Tidewater Goods tidewater.store |
$11,460 | 29.7% | 2 on |
| Solstice Print Co solsticeprint.com |
$4,038 | 21.2% | review |
| Harbor & Co harborandco.eu |
$7,915 | 31.5% | 3 on |
Getting started
Three steps, one afternoon.
Bring your catalog
Import from a supplier, a CSV or an existing Shopify export. Variants, prices and images come across with their supplier cost attached — which is the part that usually goes missing.
Write the rules
Four or five sentences in plain language: what margin to hold, when to reorder, which facility to prefer, what needs your approval. No workflow builder, no node graph.
Watch the log, not the dashboard
The agents run continuously and tell you what they did and why. You step in for the decisions that are actually yours — what to sell, what to drop, what to make next.
From the beta
What operators say.
“I found out we'd been selling the poster at a loss for a month. It caught the next one in a day.”
“The part I stopped doing is the 11pm reorder check. That alone paid for it.”
“Margin per variant was a spreadsheet I rebuilt every month. Now it's a page.”
Placeholder copy — replace with real, attributed quotes before launch.
Questions
The things people ask first.
Is this a Shopify app or a replacement?
What can the agents actually change without asking?
How is contribution margin calculated?
Which suppliers do you support?
What happens if I want to leave?
What does it cost?
Private beta
Stop running the store by hand.
Opening to 50 stores in Q4 2026. Tell us what you sell and where you sell it, and we'll get you in.