v1 invite-only beta Considering selling on Group Buys? Let's talk first.
V1 · Invite-only Now accepting vendors

Run group buys. Without a card processor.

Vendors take payment from buyers directly via Zelle or PayPal F&F. We run the storefront, the order pipeline, and the receipt review — for a flat fee per group buy you publish. No monthly bill.

$99
Starter buy · up to 5 buyers
0%
We never touch the money
48h
Reply to your application

* Invite-only beta. Apply with a brief intro and we’ll reply within a couple of business days.

Peptides Calculator app preview
How it works From browse to box, four clean stops

Pay the vendor directly. We just run the rails.

  1. 1

    Browse the vendor

    Each storefront is operated by its vendor. Filter by active group buys, pricing tier, and lead time.

  2. 2

    Join a group buy

    Lock in your slot in a batch. You see slots-left, deadline, and the exact savings vs catalog price.

  3. 3

    Pay vendor direct

    Zelle, PayPal F&F, Venmo, or Cash App. Unique memo per order so the vendor can match your payment.

  4. 4

    Ship & track

    When the buy closes, the vendor ships every order. Tracking lands in your account the moment it's posted.

Lab testing Optional, vendor-enabled, baked into the order price

Third-party batch testing. COA in your inbox.

Vendors can opt a group buy into third-party lab testing. The cost is split across the batch and folded into each buyer’s order total at checkout — no separate invoice, nothing extra to pay. When the results come back, the vendor distributes the Certificate of Analysis to every buyer in that batch. ETA stays predictable: ~3 weeks overseas shipping + 1 week lab testing — we surface the combined delivery date on the storefront before you join.

  1. 1

    Vendor enables testing

    On any group buy, the vendor toggles a lab from our trusted roster and the cost gets pooled across the batch.

  2. 2

    You pay your share

    Your slice of the testing cost is automatically added to your order total — no surprise invoices, no separate Zelle.

  3. 3

    COA delivered to buyers

    Once the lab posts results, the vendor distributes the Certificate of Analysis to every buyer in the batch.

Trusted labs

Curated globally. Available to every vendor.

Admin-vetted analytical labs. Vendors pick one per group buy from this roster (plus any private labs they bring themselves).

ILS Labs

Kovera Labs

Featured vendor Communities running on groupbuys.app

A platform built around the vendor, not the processor.

Each storefront is operated by its vendor. We just hand them the order pipeline — from the buyer’s landing page to the shipped tracking number.

AC
Live storefront /acme

Acme Peptides

Ten vials of lyophilized BPC-157, 5mg per vial. Research use only.

Direct payment · Vendor-shipped · COA per batch
Visit storefront
Now available on iOS & Android

Peptides Calculator

The precision tool researchers actually need. Free. No ads. No tracking.

Precision Calculator

Reconstitution volumes, dosing, and concentrations with lab-grade accuracy.

Vial Management

Track every vial with streaks, schedules, and remaining uses — never miss a dose.

Reference Library

100+ peptides with mechanisms, half-life, and research at your fingertips.

Calculate doses instantly — pick your syringe, enter strength, get draw units
Track every vial with streaks, schedules, and remaining uses
Detailed vial info, mark-as-taken, and next-dose tracking
Browse 100+ peptides with search, sorting, and filtering
Deep dive into peptide info — mechanisms, half-life, and research
Track your weight, body fat, and BMI over time with charts
Log lab results with AI-powered report scanning
Share your protocol card with friends and community
Manage your account, orders, and notification settings

Calculate doses instantly — pick your syringe, enter strength, get draw units

Swipe to explore

Why groupbuys Built for the categories nobody else will host

We never touch the money. You keep the relationship.

Direct payment

Buyers pay you over Zelle or PayPal F&F. We don’t process cards, so no acquirer can shut your storefront down.

Tiered by sale size

Six pricing tiers from $99 up to $499. Pay only for what your buy actually needs — nothing more.

Prepaid credit

Top up your vendor account once. New buys debit the tier fee on publish. No surprise invoices, no monthly minimum.

Full storefront

Vendor-branded landing, product detail, checkout, and order pipeline. Add a custom domain when you’re ready.

30-min demo · book today

Let’s talk before you apply.

We’re onboarding a small cohort of vendors this season. Book a 30-minute call to talk through your community, the buys you want to run, and whether Group Buys is the right fit.

Or apply directly Sign in

No monthly fee · Starter tier $99 / buy · Cancel any time.