River by Asynarch — The Accounting, as it happens
River is the autonomous accounting engine built by Asynarch. Tell River what happened. It does the rest.
Website: https://asynarch.com
Overview
River understands the accounting behind everyday business activity. You only need to describe what happened—in River or on WhatsApp—and River works out how that should be recorded:
- Tax Invoicing: Composes GST-compliant sales invoices, computes SAC/HSN codes, and debits accounts receivable.
- Vendor Bills & ITC: Extracts vendor invoices, capitalizes fixed assets, and claims Input Tax Credit (ITC).
- Bank Reconciliation & TDS: Matches bank statements against receivables, accounts for Section 194J TDS withholdings, and updates ledger balances.
Core Invariants
- Every entry is checked before it is posted.
- GST and TDS are recorded correctly.
- Locked periods reject new entries.
- Corrections keep their history.
- Every report comes from the transactions in the books.
Tech Stack
- Framework: Next.js (App Router, Turbopack)
- Motion & Animation: GSAP (
gsap, ScrollTrigger, Draggable) + Lenis Smooth Scroll (lenis)
- Styling: Tailwind CSS + Vanilla CSS Custom Properties
- Typography: Fraunces (Display), Inter (Body UI), IBM Plex Mono (Tabular Numbers)
Development
# Install dependencies
npm install
# Run local development server
npm run dev
# Build production bundle
npm run build
Routes
/ — River landing page with interactive software simulators & draggable desktop canvas./about — About Asynarch and the River story./api/waitlist — Early access waitlist submission endpoint.
