Replacement Guide

How to Build Your Own Avalara

Replace Avalara with a custom build. Agentic Tax and Compliance™, trusted and built to scale

Few Days
20 features5 integrations3-5 days

Estimated Timeline

Based on 20 features at Few Days difficulty, expect about 3-5 days with AI-assisted development.

1
Architecture & setup
Half day
2
Core features
2-3 days
3
Testing & polish
1 day

Recommended Tech Stack

Next.js 14

Full-stack React framework with API routes and server components

Supabase

PostgreSQL database, auth, and real-time subscriptions

Tailwind CSS

Utility-first styling for rapid UI development

Key Features to Replicate

Top features across 8 categories. See all 20 features

Compliance(7 features)

Audit Preparation

Tools and automation to prepare for sales tax audits and maintain audit-ready documentation

Exemption Certificate Management

Streamlines the management and tracking of sales tax exemption certificates

International Tax SolutionsPremium

Comprehensive solutions for cross-border and international tax compliance

License Guidance

Identifies appropriate business licenses required for operations

Multi-State Tax Compliance

Enables compliance across multiple states with automatic calculation and filing

+2 more in this category

Integration(5 features)

E-commerce Platform Integrations

Pre-built integrations with leading e-commerce platforms

Marketplace Integrations

Integrations with major marketplace platforms for multi-channel tax compliance

Open API

Open API to connect with virtually any system not already prebuilt

Point-of-Sale Integrations

Integrations with point-of-sale systems for retail tax compliance

Pre-built ERP Integrations

Over 1,400 signed partner integrations with leading ERP systems

Calculation(3 features)

Customs Duties and Import Tax CalculationsPremium

Automated calculation of customs duties and import taxes for cross-border transactions

Sales Tax Calculations

Automated calculation of sales and use tax across multiple states and jurisdictions

VAT and GST Calculations

Calculates Value Added Tax and Goods and Services Tax for international compliance

AI(1 features)

Agentic AI Tax AutomationAIPremium

AI-powered automation that performs tax compliance tasks including calculations, returns, and reporting

Document Management(1 features)

Document Management

Streamlined management and storage of tax compliance documents

Reporting(1 features)

Sales Tax Returns Management

Automation to manage and streamline sales tax return filing and reporting

Research(1 features)

Tax ResearchAI

Automated tax research capabilities to identify tax obligations and changes

Tax Calculation(1 features)

AvaTax

Core tax calculation and compliance platform that handles sales tax, VAT, GST, customs duties and import taxes

Cost Calculator

Pricing data not available for Avalara. Check their website for current pricing.

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