The acquisition follows Avalara's closing of a $100-million round in funding. Among other recent expansion moves was its announcement of a 40,000-sq.ft. office in Durham, N.C., that will house 115 employees initially.

Richard Asquith, the former administrator of VATLive.com, who joined Avalara in July, noted in a prepared statement that VATLive services include "country-specific guides on ever-changing tax rates, returns, registrations, and filings from across the world, referenced by thousands of unique visitors every day."

Avalara's TaxRates.com portal performs a similar role in the United Sates.