Taxwire

Taxwire's pitch is that sales tax should be something a finance team hands over entirely, not another system to run. It pairs an AI calculation engine with its own team of tax professionals, so the customer gets software and an outsourced indirect tax function in one contract.

What it does well. The managed model suits companies without in-house tax staff. Nexus studies, taxability research, registrations, back-filings, filing and remittance and state mail triage are all covered, and the team handles the decisions that pure software leaves to the customer, such as how to respond to an audit letter. Xero sits alongside QuickBooks and NetSuite in the named integrations, which is useful for UK practices with US-selling clients. The company says it is SOC 2 Type II certified, and a structured four-week onboarding with an exposure report on day one gives a clear early deliverable. The mid-2026 funding round, in which existing investors all added more, suggests backers are content with progress.

Where it falls short. No prices are published, so a buyer cannot compare it with the per-filing pricing of Kintsugi or Numeral without a sales call, and a managed service will usually cost more than software alone. The scope of global VAT coverage is not set out on the site, so UK and EU needs should be confirmed in writing. Claims such as roughly half of customers moving from Avalara come from the company and press interviews. It is a small, young company of around two dozen people, which matters when it is taking on responsibility for filings. Relying on a vendor's team for judgement calls also means less knowledge sits inside the business or its accountant.

Best for. Software, ecommerce and manufacturing companies with exposure in many states or several entities and no internal tax function, and the finance leads who want the work taken off their desk. Smaller sellers happy to run software themselves will pay less with Kintsugi or TaxJar, and enterprise groups with e-invoicing obligations should look at Sovos.

Verdict. A credible managed alternative to running sales tax software in-house, but buyers should get a written scope and price, especially for VAT, before handing over their filings.