We move retail's daily workload into software
Posmist is a cloud-based POS + ERP platform built in Istanbul for grocery stores, off-licenses, kiosks and chain retailers. As a Webgrup company, we bring the entire process — from register to shelf, invoice to profit — onto one platform, built to enterprise security standards.
1,500+
businesses using Posmist
13
integrated modules
100%
offline sales continuity
24/7
WhatsApp & phone support
Six decisions that shape the product
The register never stops
Offline-first architecture has been a design decision from day one; an internet connection is an enhancement, not an assumption.
One source of truth
Product, price, stock and sales all live in one place; ESL labels, invoices and reports draw from the same data. No double entry.
Profit you can see, not guess
Profitability is measured with your chosen costing method (FIFO, moving average or last purchase price) and expense allocation. Numbers aren't rounded to look nicer.
Permissions on the server, experience in the UI
Hiding a button isn't security; every request is verified against a permission on the server, and every change is written to an audit log.
Never locked to one provider
The e-invoice integrator, payment and hardware layers are swappable adapters. When the market changes, you don't have to.
Support is a feature
Sending a screenshot on WhatsApp and getting a reply within minutes is part of the product — not an add-on package.
How we protect your data
Tenant isolation (RLS)
Every business's data is separated at the database level with row-level security; not even an application bug can expose another business's data.
PostgreSQL Row-Level Security · Tenant context resolved from the JWT · Fail-closed policy
Offline data security
Sales pending on the device and sensitive fields are stored encrypted; local data is cleared on logout.
AES-GCM encrypted local storage · Duplicate protection via a unique transaction id · Cleared on session end
Auditability
Changes to price, stock, balance, roles and users are written to an immutable audit log.
Append-only audit log · Who / when / what changed · Anomaly and fraud detection
Data-protection compliance
Personal data is processed for a limited purpose, with ready-made processes for data-subject requests.
Data-subject request handling · Sensitive-field encryption · Disclosure and explicit consent
Adapters, not lock-in
e-Invoice / e-Archive
Provider-independent, multi-integrator, canonical UBL-TR model.
Next-gen fiscal device (GMU)
Command channel to an A90-based fiscal device; the receipt is issued from the register.
ESLCLOUD
E-ink shelf-label cloud; a price change reaches the shelf instantly.
PayTR
Subscription billing and installment options.
TCMB exchange rate
Multi-currency pricing with the daily central bank rate.
API & Webhooks
An API key and webhooks for streaming data to external systems.
Support as part of the product
WhatsApp support
The fastest channel. Send a screenshot, we'll sort it out together.
+90 850 885 0 932
Phone
Setup, hardware and pre-sales questions.
+90 850 885 0 932
In-app support
Open a request from the panel, track its history.
Support center