Aiwyn has joined Anthropic's Claude Connector ecosystem, integrating its AI-native tax calculation engine into Claude's platform. The partnership enables users to run 1040 calculations, perform scenario analysis and evaluate tax outcomes in real time directly within Claude. Founded in 2020, Aiwyn has processed over one million real-world 1040 returns and developed TaxCalcBench, a framework for validating calculation accuracy. The company's platform combines billing automation, client collaboration tools and tax calculation capabilities, enhanced by its December 2025 acquisition of Column Tax. The connector is now live at claude.com/connectors/aiwyn-tax. Aiwyn serves over 900 accounting firms and is backed by investors including KKR and Bessemer Venture Partners. The company plans to expand its tax engine coverage and deepen ecosystem integrations.

Withum, a top 25 accounting firm, has partnered with technology company Aiwyn to launch Aiwyn Experience, a unified client portal designed to streamline service delivery and client engagement for professional services firms. The platform consolidates traditionally disconnected client-facing tools into a single system, handling request intake, document exchange, deliverables and payment. Withum collaborated with Aiwyn to develop the custom-branded solution, which integrates seamlessly with existing technology through modular architecture and open APIs. According to Aiwyn research, 76% of accounting firms rate client experience as their top priority. The platform aims to address the gap between client expectations and disparate tools firms traditionally use, reducing manual coordination and allowing teams to focus on higher-value work whilst supporting scalable growth.