The platform

One platform. Every dollar that changes hands.

Checkout, payments, customer service, and subscriptions — engineered together so they compound instead of fighting each other.

01 · Checkout

The fastest checkout on the open web.

Drag-and-drop builder, sub-0.9s render, 1-click reorder, post-purchase upsells, and a CDN-first architecture that doesn't crumble on Black Friday.

  • Drag-and-drop checkout builder
  • Sub-0.9s render globally
  • 1-click reorder for returning shoppers
  • Post-purchase upsell + cross-sell
  • 100+ A/B variants out of the box
  • PCI Level 1 certified iframe
The fastest checkout on the open web.
02 · Payments

Approval-rate optimization, not just gateways.

Route every transaction to the processor most likely to approve it. Auto-failover on decline. Unlimited merchant IDs. Native 3DS2 and ML-based fraud scoring.

  • 40+ processors out of the box
  • Smart approval-rate routing
  • Auto-failover on decline (<1s)
  • Unlimited merchant IDs
  • 3DS2 + ML fraud scoring
  • Auto chargeback dispute filing
Approval-rate optimization, not just gateways.
03 · Customer Service

An inbox built around the order, not the email.

Email, SMS, chat, IG/TikTok DMs, and order replies — every channel, stitched to the customer's order history. Agents resolve 3× faster, customers stop repeating themselves.

  • Unified email/SMS/chat/social inbox
  • Full order + subscription context inline
  • AI-suggested replies in your tone
  • One-click refund + RMA
  • Macros, snippets, canned flows
  • Live chat widget for your storefront

Email · refund

SMS · order #421

Chat · sizing

IG · gift card

Email · review

Hi, my order #421 still hasn't shipped — can someone check?

AI suggested reply

Hi Maya — your order shipped this morning, tracking is on the way. Sorry for the wait!

Send Edit

Maya Chen

LTV $1,284 · 12 orders

Subscription Active
Last order #421
04 · Subscriptions

The retention engine that pays for itself.

Recurring billing, smart dunning, customer portal, swap/skip/gift flows, and ML-driven retry that recovers up to 62% of failed renewals.

  • Recurring + prepaid + build-a-box
  • Smart dunning with ML retry
  • Customer self-service portal
  • Swap, skip, gift, pause flows
  • Subscription analytics + cohorts
  • SMS + email lifecycle nudges

18,920 active

$284k MRR

3.2% churn

62% recovered

Failed-renewal recovery, last 12 weeks

05 · Multi-brand

Every brand. One console. Shared graph.

Run separate storefronts for each brand while keeping one customer object, one inventory feed, and one source of truth for orders across all of them.

  • Unlimited brands per workspace
  • Brand-scoped permissions
  • Cross-brand customer graph
  • Shared inventory + ops
  • Per-brand processor configs
  • Roll-up + drill-down reporting
Northshore +12%

$84k

GMV today

Apex Labs +8%

$62k

GMV today

Koda&Co +24%

$48k

GMV today

Revive +18%

$36k

GMV today

06 · Developer API

A typed API for the parts we didn't build.

REST, GraphQL, and webhooks. Native SDKs for TypeScript, Python, Go, and Ruby. Schema introspection. 99.99% uptime SLA on Enterprise.

  • REST + GraphQL APIs
  • Typed SDKs (TS, Python, Go, Ruby)
  • Inbound + outbound webhooks
  • OAuth + scoped API keys
  • Headless storefront support
  • 99.99% uptime SLA
create-checkout.ts
// Create a checkout session
import {`{ GrowthFlowLine }`} from '@gfl/sdk'

const gfl = new GrowthFlowLine({`{ apiKey: process.env.GFL_KEY }`})

const checkout = await gfl.checkout.create({`{
  brand:    'northshore',
  cart:     [{ sku: 'GREEN-30', qty: 1 }],
  upsells:  ['SLEEP-STK'],
  routing:  'auto',
}`})

// → tokenized, routed, ready to redirect.
Talk to sales

The platform your DTC brand deserves.

Replace your checkout, payments, CRM, and subscription apps with one platform. Migrate in a weekend.

20-min call Weekend migration Real operators