Avalara vs Vertex: sales tax and e-invoicing software compared for finance teams (October 2026)

Avalara or Vertex: the verdict

Avalara vs Vertex: comparison table

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Avalara vs Vertex: what it costs per year

Origins and scale: Avalara grew from small sellers upward, Vertex from large ERPs downward

Avalara describes itself as serving more than 43,000 businesses and government entities in more than 75 countries (November 2025) and is headquartered in Durham, North Carolina. Vista Equity Partners remains the majority shareholder. In November 2025 an investor group led by BlackRock put in $500 million, and the press release says all of the proceeds were used to buy shares from existing shareholders, so the money went to sellers and not into the company. Avalara's own about page still shows an older figure of 41,000+ customers, which is a reminder to check the date on any customer count.

Vertex has sold tax software since 1978, is headquartered in King of Prussia, Pennsylvania, and says more than 60 percent of the Fortune 500 use it. Its second quarter 2026 report counts 5,459 customers, of which 4,919 are direct and 540 are indirect. The homepage still says 4,500 companies, again an older figure. Vertex names Walmart, Siemens and Leggett & Platt among its customers. The shapes of the two customer bases explain most of the product differences below: Avalara counts customers by the tens of thousands, Vertex counts them by the thousand and earns about $143,000 a year from the average direct customer.

Which side of that line you sit on is the first filter. A company with a Shopify store, a QuickBooks ledger and filing duties in a dozen states is the typical Avalara account. A group with an SAP landscape, intercompany flows and subsidiaries in several countries is the typical Vertex account. Our directory lists 62 tools for tax automation, 15 of them headquartered in the US, so neither vendor is alone in its segment. We compare Avalara with another e-invoicing specialist in Avalara vs Sovos.

Pricing: Avalara prints a per-state price list, Vertex sells by quote

Avalara publishes its sales tax plans (as of October 2026). Core Compliance costs $79 per state and month, or $799 per state and year, which the vendor describes as a 15 percent saving. It covers AvaTax calculation, Managed Returns filing, nexus monitoring, exemption certificate management and compliance support. Core Compliance + SST Services costs $69 per state and month or $699 per state and year. It adds state-funded services in up to 25 Streamlined Sales Tax (SST) states for qualifying sellers, audit liaison support and a single SST identification number.

Both published plans are limited to companies with annual revenue under $50 million. Above that, Avalara offers a Custom plan by quote, with multi-entity management, consolidated reporting and a 1-hour support response target. Sales tax registration is priced separately at $403 per location, and Avalara License Guidance starts at $119. The pricing page mentions no free trial.

The arithmetic is simple, which is the point. Ten states on Core Compliance cost $9,480 a year billed monthly and $7,990 billed annually. Ten states on the SST plan cost $8,280 and $6,990. Twenty-five states on Core Compliance cost $23,700 billed monthly and $19,975 billed annually. These figures exclude registration fees, other modules and any cost of connecting your system. For an orientation on the other side: Vendr, a software buying platform, reports a median Vertex contract of $40,297 a year across 47 purchases, with a range from $9,648 to $135,747. That is a third-party estimate based on customer deals, not a Vertex price, and company profiles in it differ from Avalara's published-plan customers, so do not compare the two numbers one to one.

Vertex published no prices on its site when we checked. Its pricing is assembled by sales from the tax engine, e-invoicing, reporting and filing modules, and Vendr lists transaction volume, deployment model, modules and jurisdiction complexity as the main drivers. Vendr also puts implementation at $50,000 to $200,000 or more, which is its estimate and not a vendor statement. Ask Vertex to price the AI agents as separate lines, since its AI page does not say whether they are included in the base contract.

Contract terms matter as much as the list price. Avalara's subscription terms (checked October 2, 2026) provide for automatic renewal for a term equal to the initial term, at least 30 days of written notice from the customer to opt out, and at least 60 days of advance notice before a price increase takes effect. Avalara itself must give 90 days to decline a renewal. Capterra reviewers mention difficulty canceling and unexpected charges as recurring themes, so read the renewal clause and calendar the notice date before you sign.

Fit and integrations: both name SAP, Oracle and Workday, so test your own system

Vertex lists integrations with SAP, Oracle, Microsoft, Shopify, NetSuite and Workday on its site and offers three deployment models for its O Series: on premises, cloud on AWS, Oracle Cloud Infrastructure or Microsoft Azure, and hybrid edge containers for point-of-transaction processing. The on-premises and edge options matter for companies that cannot send every invoice line to an external API. The O Series page describes determination and calculation, with standard reports for audit and reconciliation, and says little about filing, so ask which Vertex module files your returns.

Avalara's integrations page lists 1,400+ signed partner integrations, and it names Microsoft Dynamics, Oracle, SAP, NetSuite and Workday next to Shopify, QuickBooks, Sage, Adobe Commerce, BigCommerce, WooCommerce and Salesforce. The old shorthand that Avalara is for small shops and Vertex is for ERPs is therefore only partly right. Avalara also serves enterprises, and its Custom plan exists for them. What differs is the center of gravity: Avalara's catalog is broad and ready-made, while Vertex concentrates on a smaller set of large-system integrations.

Support quality is where independent data helps. Capterra shows Avalara at 4.0 out of 5 from 364 reviews, with ease of use at 3.8 and customer service at 3.4. Reviewers praise automation and multi-state filing and criticize slow support, a steep learning curve and cancellation problems, and the page notes that smaller businesses cite support and billing more often than enterprise customers do. We could not read a comparable verified review summary for Vertex because the main review sites block automated access. Vendr's guide, which is not a review site, flags implementation cost as the main hidden expense. Ask both vendors for two reference customers with your ERP and a similar number of jurisdictions.

The US legal background is the same for both. In South Dakota v. Wayfair, decided June 21, 2018, the Supreme Court ruled that a state may require sellers without a physical presence to collect sales tax. South Dakota's law applied to sellers with more than $100,000 of sales or 200 or more transactions a year into the state. Nexus monitoring, state registration and per-state filing exist because of that ruling, which is also why Avalara prices per state.

AI features: Vertex names four agents as available, Avalara is rolling out an agent hub

Vertex's AI page lists four agents and marks none as beta. The Configuration Agent identifies how changes in Vertex tax content affect your own configuration. The Product Mapping Agent applies product tax classifications consistently across jurisdictions. ERP and Workflow Agents detect transaction patterns and support reconciliation. The Text-to-Tax Agent creates tax rules from natural language. In its second quarter 2026 release, Vertex's CEO describes an AI-first strategy that is starting to improve engineering and customer delivery, which is a statement about internal work and not a product claim.

Avalara's AI page presents Avalara Aviator as an agentic command center, with ALFA (the Avalara LLM Framework for Agentic Applications) behind it and Avi as the plain-language agent. It describes specialized agents for tax calculation, returns filing, exemption validation, cross-border classification, notice management, e-invoicing and VAT onboarding. The page marks Aviator and the core AI features in AvaTax, Returns, exemption certificate management and e-invoicing as generally available, and marks enhanced agentic features for notice management, rule building from AI prompts and expanded natural language API support as beta or coming soon. Versori, a platform for building integrations with agent guidance, is also shown as new.

There is one inconsistency to handle. Avalara's press release of September 23, 2026 says Aviator is initially available to existing customers at no additional cost and becomes generally available after its CRUSH Europe event in October 2026, while the product page already says generally available. Ask for the contract language that defines what you get on the day you sign. The press release lists these starting capabilities: mapping products to tax codes, reporting transaction and tax liability data, validating exemption certificates, generating tax matrices, analyzing results across applications and configuring custom rules.

For both vendors, the buying question is governance and not the feature list. Who approves a tax rule that an agent drafted, is there an audit trail of what the agent changed, and which model provider sees your transaction data? Neither the Avalara DPA nor the Vertex Trust Center answers the last question in the documents we read. Avalara's DPA contains no AI provisions, and Avalara's trust center lists AI governance materials among its downloads. Vertex's trust center names the EU AI Act among its frameworks but gives no risk classification for its agents.

E-invoicing: dates in Germany, France and Poland set the pace

E-invoicing is where the product lines now overlap most, and the legal dates are close. Germany: since January 1, 2025 every business must be able to receive e-invoices in the EN 16931 standard. From January 1, 2027 businesses above €800,000 in turnover can no longer issue paper or non-standard electronic invoices, and from January 1, 2028 the rule covers all businesses, according to the European Commission's country page. Accepted formats include XRechnung and ZUGFeRD 2.1, with Peppol BIS Billing 3.0 also supported.

France: all businesses must be able to receive e-invoices from September 1, 2026, and the largest VAT-registered companies start e-reporting of B2C and cross-border transaction data on that date, with smaller companies following on September 1, 2027. Poland: the national KSeF system became mandatory for businesses above 200 million PLN in revenue on February 1, 2026 and for all B2B transactions from April 1, 2026, and foreign businesses without VAT registration in Poland are exempt.

Vertex says its e-invoicing covers 50+ jurisdictions, including France, Germany, Italy, Spain, the UK, Brazil, Mexico, Canada, Australia, India, Malaysia and Taiwan, across B2B, intercompany, B2G and B2C flows, and names Peppol and continuous transaction controls. It bought ecosio, an EDI and e-invoicing network, announced on August 7, 2024 for $69 million in cash up front plus an earn-out. In its second quarter 2026 release it says e-invoicing momentum is improving as enterprises prepare for expanding mandates.

Avalara's e-invoicing page names Italy, Spain, France, Germany, the UK and Australia, supports clearance, real-time reporting and centralized or decentralized models, and says it is a certified Peppol Access Point and a certified provider for the UK's DBNA network. Both vendors therefore cover the main European mandates on paper. The test is a working file: ask each to produce a valid XRechnung or ZUGFeRD document, or the French equivalent, from your own ERP data, and to say who is liable when a tax authority rejects it.

Security and data location: Vertex names regions, Avalara publishes contract terms

The Vertex Trust Center lists SOC 1 Type II, SOC 1 Type I, SOC 2 Type II and ISO 27001:2022, and says it addresses GDPR, CCPA and the EU AI Act. It names infrastructure at AWS (US, Ireland, Germany), Microsoft (US) and Oracle (US, Switzerland, Germany). Five subprocessors are listed: AWS, Microsoft and Oracle for infrastructure, ecosio for electronic invoicing (UK, Germany, Austria) and Global VAT Compliance for tax registration (Netherlands). Vertex says it will enter into a DPA, performs annual third-party audits and penetration tests, and deletes customer data on request. We found no public DPA text, so the terms are negotiated.

Avalara's trust center lists ISO 27001, SOC 2 Type 2, SOC 1 Type 2, and, for select products, ISO 22301 and TISAX. Most widely used products such as AvaTax, Avalara Returns and Managed Returns hold SOC 1, SOC 2 and ISO 27001; only E-invoicing and Live Reporting carries all five. The trust center publishes no hosting regions. Its public DPA says Avalara transfers personal data outside the European Economic Area, the UK and Switzerland using adequacy decisions or the standard contractual clauses of Commission Decision 2021/914 with a UK addendum, and that it may use subprocessors outside the EEA. It promises deletion or return of data after the service ends.

For a European subsidiary the practical difference is where an auditor can point. Vertex gives a region list and a short subprocessor list in one place. Avalara gives a public contract template and an unspecified location. Neither is wrong, but a works council or data protection officer who needs a named region will get an answer faster from Vertex's page and will have to ask Avalara in writing.

Both vendors process invoice data that can include customer names and addresses, so a GDPR review applies in either case. For German companies the usual checklist is an Art. 28 GDPR processing agreement, the standard contractual clauses for any transfer to the US, the subprocessor list, and retention rules that fit the German obligation to keep invoices for years. Put the deletion terms in the contract, because a tax engine that deletes data on request can conflict with your own retention duty.

Vendor risk and financial position: public numbers against a private balance sheet

Vertex reports its numbers. For the second quarter of 2026, announced August 3, 2026, total revenue was $204.0 million, up 10.5 percent from a year earlier, and annual recurring revenue was $703.4 million. Cloud revenue grew 17.9 percent to $101.7 million. Net revenue retention was 105 percent, down from 108 percent a year earlier, and gross revenue retention was 95 percent. Vertex reported net income of $9.0 million and guided full-year 2026 revenue to $825.0 million to $830.0 million. A listed vendor means audited filings and an investor relations page, which some procurement teams require.

Avalara is private and does not publish comparable metrics. What it does disclose is the November 2025 investment led by BlackRock, with Vista staying as majority owner, and the customer and country counts quoted above. Private ownership by a financial investor is not a defect, but it means you rely on the vendor's statements instead of filings. GeekWire's 2022 report on the Vista takeover is the independent record of how that ownership began.

Switching cost deserves a line in your business case. Both engines sit deep in invoicing flows, and exemption certificates, nexus history and filing records accumulate inside them. Ask each vendor how you export your certificate library and filing history, what it costs, and how long after termination the data stays available. Avalara's 30-day cancellation notice and Vertex's negotiated terms are different starting points for that conversation.

Who should pick Avalara and who Vertex

The bottom line

Count your filing states and name your ERP first. If you are under $50 million in revenue and file in a limited number of US states, Avalara's price list lets you budget today, and Vertex will likely be more than you need. If tax logic runs inside a large ERP across many countries, or you need a European data region and public financials, ask Vertex for a quote and Avalara for its Custom plan, then compare line by line, including AI, e-invoicing, deletion terms and exit costs. For either vendor, get hosting regions, the AI provider list and a working e-invoice file for your ERP in writing before you sign.