OS-ERP^™The operating system of business

One ledger that grows with the business,
from a one-person shop to ten thousand users.

A single codebase, a single ledger, and no implementation project. Complexity appears when a business event demands it — never because a consultant configured it in advance.

Configuration is our competitor. Conversation is our product.

▸ open workspace read the product document

data models in one schema: 171
API endpoints live: 563
migrations applied in order: 101
lifecycle stages — 14 sales + 14 purchase: 28

Vision & thesis

One ERP for the globe — run entirely through plain language, with zero technical or functional consultants. The ERP grows like a ledger, not like an implementation project: complexity appears only when business events demand it.

the problem

Legacy enterprise suites need consultants and months of configuration. Tally has keyboard speed but no cloud, no approvals, no AI. Zoho and QuickBooks are friendly but shallow — no GR/IR clearing, no multi-book accounting, no conditional account determination. Nobody ships one ledger that grows with you.

The architecture, top to bottom

UI SKINSSwitchable experience modes — presentation only, never logic

AI ORCHESTRATORParses, drafts, explains — never posts

POLICY LAYERBusiness rules as data, not code — natural language compiled to deterministic checks

KERNELTiny, universal double-entry engine · immutable event log · inventory · parties · documents

Five non-negotiables

No consultant, ever
If a feature requires documentation, training, or an implementation partner to use, it is wrong. Our decision heuristic: “Would this force a one-person company to hire a consultant? If yes, find another way.”
Deterministic core, probabilistic edge
AI parses, suggests, drafts and explains. AI never posts. Only kernel-validated, human-confirmable transactions reach the ledger — each traceable to an immutable event.
Single-window flows
One window for the full purchase flow, one for the full sales flow — stages as tabs, never fragmented screens. The user moves a document through its life; they never “navigate a module”.
UI is a skin, business logic is not
All flows run on one headless API. Four experience modes — Classic, Rapid, Flow, and Forms — switch live without losing context or data.
Any size without migration
Day one is a notepad and a stream. Approval chains, dimensions, multi-entity and warehouses appear on demand. Growing never requires reimplementation.

Single-window document flows

One window for the full sales flow, one for the full purchase flow. Stages are tabs; the user moves a document through its life rather than navigating a module.

sales

LeadOpportunityQuotationSales OrderApprovalFulfillmentDeliveryShipmentInvoicePaymentReturnsCredit NoteCollectionsClosure

purchase

Purchase RequestRequisitionRFQVendor QuotationComparisonPurchase OrderApprovalGoods ReceiptQuality InspectionA/P InvoiceVendor PaymentDebit NoteReturnClosure

GL mapping engine

Which account a document posts to is a rule, not a hard-coded branch. Thirty-eight dimensions, thirteen levels of fallback, and a simulator that shows the journal before anything is committed.

Item group = Electronics + warehouse = Main → inventory posts to GL 130100
Customer group = Export → revenue posts to Export Sales
Branch = Dubai + tax = VAT 5% → UAE Output VAT
Payment method = Card → Card Clearing Account
Transaction currency ≠ company currency → exchange gain/loss posts automatically

Approvals & workflow engine

Every forward stage transition passes one gate. Rules are written in plain language, compiled to deterministic checks, and enforced by the engine — never by the screen.

AAUTONo rule matched — the stage advances instantly. Zero rules means safe auto, never a bypass.

BBLOCKA hard rule failed — e.g. PO unit price up >5% vs last purchase. The document cannot move.

CPENDINGRoute to a human — an approval request lands in the right person’s Action Center.

“Purchase orders over ₹5,00,000 need the finance manager, then the CFO” → the rule is drafted in plain language → a human enables it → the engine enforces it on every document, every time.

It drafts, it explains, it never posts

Deterministic core, probabilistic edge. The assistant is on every surface; the kernel alone decides what reaches the ledger, and only a human can confirm it.

AI proposes

“Draft a receipt for Skyline’s NEFT of ₹14,16,000”

Human confirms

Posting slip with inferred values highlighted

Kernel validates

Access → period lock → Dr = Cr → atomic commit → audit log

All modules

Financials8

Accounting & VouchersDouble-entry vouchers, reversals, FX adjustments, period locks.live
GL Mapping Engine38 dimensions, 13-level fallback, simulate & what-if.live
Multi-Book AccountingIFRS · LOCAL · TAX · MGMT books from one event.live
Tax & ComplianceGST engine, HSN/SAC, auto CGST/SGST/IGST, country packs.live
Multi-CurrencyPer-line exchange rates, automatic FX gain/loss posting.live
Financial ReportsTB, P&L, Balance Sheet, GL, Day Book, Cash Flow, Tax Summary.live
DimensionsCost centers, profit centers, projects, segments.live
Revenue RecognitionSchedules and recognition runs on the GL engine.live

Operations9

Item MasterTypes, categories, brands, UoMs, BOM, attributes, media.live
Inventory & WarehouseBins, batches, FEFO, ATP reservations, landed cost.live
Business PartnersRoles, credit profiles, KYC, bank & tax records, GL links.live
Sales Workspace14-stage order-to-cash document chain.live
Purchase Workspace14-stage procure-to-pay document chain.live
POSRegisters, split tender, thermal receipts, offline-fast billing.live
Order Management8 channels, ingest API, scan fulfillment.live
Salesmen & CommissionTargets, commission rules, performance tracking.live
Billing SchedulesMilestone, progressive and subscription invoicing, retention.live

Projects5

Projects & WBSWork-breakdown tree; only a leaf collects cost.live
Budgets & CommitmentsAvailability checked at ordering, not at invoice.live
Progress & POCCost-to-cost against estimate at completion, IFRS 15.live
SettlementCapitalise, expense or re-tag; reversible.live
Gantt & TimesheetsScheduling and time capture on the same WBS.soon

People3

Employee MasterProfiles, tax records, documents, lifecycle.live
Leave & AttendanceBalances, accrual, approvals on the same policy gate.live
PayrollPay runs, statutory deductions, GL-linked posting.live

Commerce4

StorefrontPublic catalogue, cart, checkout — one audited order path.live
Online CatalogueWhat is published, and under which shop-facing labels.live
Themes & Page BuilderTyped sections, templates, live revalidation.live
Returns & RefundsShopper-initiated, reviewed, credited through the flow.live

Control5

Users & RBACRoles, permissions, invites, per-company access.live
Approvals & WorkflowMulti-level flows, condition trees, policy gate.live
Work RoutingQueues, claim soft-locks, SLAs, Action Center.live
Audit TrailImmutable who/when/old/new/IP on every sensitive action.live
Sessions & Idle LockRotating refresh tokens, per-company idle policy.live

Intelligence5

AI CopilotBYO-LLM, encrypted keys, token budgets, RAG.live
MCP ServerScoped, audited access for customers’ own AI agents.live
Insights CenterDeterministic findings with one-click Fix / Fix-with-AI.live
⌘K Command PaletteFuzzy actions, recents, Ask-AI fallback.live
Help CenterF1 per-screen help, field tips, full user guide.live

Platform7

Public APIVersioned /api/v1, scoped keys, idempotency.live
WebhooksHMAC-signed, retries, replay, delivery logs.live
NotificationsSMS, WhatsApp and email — 12 gateways, rules per event.live
DashboardsTiles built from live company data; ask for a chart.live
Data MigrationTally XML in, reconciled to the paisa before it commits.live
Print DesignerHTML/CSS templates, A4 + thermal, version history.live
English / العربيةFull RTL, bilingual masters and printed invoices.live

Coming next4

Advanced ManufacturingBOM costing, work orders, subcontracting depth.soon
OAuth MarketplaceThird-party apps on scoped OAuth 2.0.soon
Industry PacksVertical presets — flags and templates, not forks.soon
E-Invoicing CertsPer-country clearance integrations.soon

Against the alternatives

Capability	OS-ERP	SAP / Oracle	Tally	Zoho / QB
Zero-consultant setup (NL policy layer)	✓	✕ consultants	Partial	✓
Enterprise depth (GR/IR, multi-book, retention, landed cost)	✓	✓	✕	✕
Keyboard-first speed (F4–F9 vocabulary)	✓	✕	✓	✕
Cloud-native multi-tenant SaaS	✓	Hosted	✕ desktop	✓
Switchable UI modes on one dataset	✓	✕	✕	✕
Pre-posting simulation & what-if rules	✓	Custom dev	✕	✕
Audited MCP access for customers’ AI agents	✓ category first	✕ closed	✕	✕
1 user → 10,000+ users, no migration	✓	✕ re-implementation	✕	✕ ceilings

Editions

The same codebase and the same ledger at every size. An edition switches what is visible, never what is underneath — which is why growing never means migrating.

Shop1–5 users

POS + simple books. Engines hidden; a solo trader is “everyone” — zero setup.

Standard5–50 users

Basic engines, simple approvals, full accounting and inventory.

Professional50–500 users

Full GL-mapping, workflow and pricing engines; serial/batch & landed cost.

Enterprise500–10,000+

Unlimited multi-company & country, custom dimensions, OAuth apps.

Schema & API surface

One schema, one API, one deployment — the same 171 models back a one-person shop and a ten-thousand-user estate. Names below are copied from the schema and the controllers, so anything here can be checked against the product rather than taken on trust.

Data models · 40 of 171 shown

kernel · ledgerVoucherVoucherLineLedgerEntryLedgerAccountingBookFinancialPeriod

dimensionsCostCenterProfitCenterSegmentProjectWbsElement

currencyCurrencyMasterExchangeRateIndex

inventoryItemItemCategoryItemMediaStockEntryStockBatchWarehouseUnitOfMeasureBrand

document flowProcessDocumentProcessLineProcessActivityGlPostingTemplateGlStagePosting

policy · approvalsPolicyRuleApprovalRequest

point of salePosSalePosSaleLinePosSalePaymentPosSessionPosHeldSaleLoyaltyTransaction

storefrontStoreStoreContentStorePageStorefrontCartStoreReturnRequest

notificationsNotificationChannelNotificationTemplateNotificationRuleNotificationLog

assistant · auditAiConversationAiUsageLogAiAccessGrantAuditLogSession

Route groups · 20 of 35 controllers · 563 endpoints

/api/v1/business-partners53
/api/v1/pos47
/api/v1/gl-mapping43
/api/v1/items40
/api/v1/process-workspaces33
/api/v1/projects27
/api/v1/storefront-admin24
/api/v1/storefront24
/api/v1/accounting23
/api/v1/vouchers20
/api/v1/payroll19
/api/v1/dashboards19
/api/v1/ecommerce17
/api/v1/workflow15
/api/v1/orders15
/api/v1/notifications13
/api/v1/ai10
/api/v1/tax9
/api/v1/imports9
/api/v1/mcp7

Every one of them is tenant-scoped and permission-guarded: a request carries its tenant, organisation and company, and no business query runs without all three.

Proof, not promises

One worked example, end to end: 100 units purchased, 40 sold, landed cost applied, GR/IR cleared. These are the closing balances the engine produces.

Inventory on hand (60 units): ₹ 9,00,000 Dr
Cost of goods sold (40 units): ₹ 6,00,000 Dr
GR/IR clearing: ₹ 0 — nets to zero
Vendor control (Nexus): ₹ 0 — nets to zero
Customer control (Skyline): ₹ 0 — nets to zero
ICICI Bank (net): ₹ 3,54,000 Cr

API controllers: 35
GL mapping dimensions: 38
accounting books — IFRS/LOCAL/TAX/MGMT: 4
industry verticals on one kernel: 15

See your own books run on OS-ERP

Bring a month of real documents. We will run them through the ledger and show you the journals, not a slide about them.

▸ open workspace sales@virtux.in

One ledger that grows with the business,from a one-person shop to ten thousand users.