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Avalara vs Thomson Reuters ONESOURCE Indirect Tax Determination comparison

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Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Avalara
Ranking in Tax Management Software
1st
Average Rating
8.6
Number of Reviews
7
Ranking in other categories
No ranking in other categories
Thomson Reuters ONESOURCE I...
Ranking in Tax Management Software
2nd
Average Rating
8.8
Number of Reviews
4
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2026, in the Tax Management Software category, the mindshare of Avalara is 10.1%, down from 16.5% compared to the previous year. The mindshare of Thomson Reuters ONESOURCE Indirect Tax Determination is 10.3%, up from 2.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Tax Management Software Mindshare Distribution
ProductMindshare (%)
Avalara10.1%
Thomson Reuters ONESOURCE Indirect Tax Determination10.3%
Other79.6%
Tax Management Software
 

Featured Reviews

MM
senior accountant at a manufacturing company with 501-1,000 employees
Automation has transformed tax compliance workflows and supports efficient certificate management
I think as far as improvement with Avalara, we are a manufacturing company, so we have some one-off situations or distributors and things of that nature that aren't very well educated on the tax compliance and so it kind of puts us in a position that when we are requesting different certificates, they don't really understand. For example, Idaho, they know that they can use their Idaho certificate and if they are a reseller, they can use it in all 50 states. However, of course, in Avalara, it doesn't work that way. We have to have certificates, whether it is a multi-state form or individual certificates, for those other areas that shipments may occur to be exempt. Otherwise, it won't recognize it. I think the account executive support could definitely be improved for a business customer.
Kevin Oakley - PeerSpot reviewer
Senior Director, Tax at a retailer with 10,001+ employees
Automated tax reporting has reduced manual work and supports accurate audit-ready filings
Thomson Reuters ONESOURCE Indirect Tax Determination has positively impacted my organization by shifting it from a manual process to a more automated process.That shift to automation has affected my team by improving efficiency; it reduced the amount of time it took my team to prepare to gather the information, review it, and report it on our sales tax returns, and it also cut down on some of the time that our other departments, such as accounts payable, had to review invoices. I have seen a return on investment, as we saved time; it took probably three weeks to prepare returns, and now we are able to do it in probably a week.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"Avalara has positively impacted my organization and my clients' organizations by helping them to get their hands around the indirect tax space and to have a tool that will do a lot of the calculation heavy lifting behind the scenes without a lot of interaction by them, and give them the reports and information that they need to file tax returns monthly with the various tax authorities."
"When we have filed VDAs, AvaTax allows us to calculate correct taxes even for periods before we began using it."
"What I appreciate most about Avalara, which I have been using for approximately three years, is its AvaTax product, which is excellent for calculating tax and making taxability determinations."
"Interfaces with AvaTax to ensure customers with valid exemption certificates are not charged tax(es)."
"Automating the calculation of the tax charged on invoices."
"All the features related to AvaTax are excellent in my experience, especially tax calculations."
"Warns of expiring certificates."
"Avalara has impacted my organization positively because when I started, we were at 11 to 13% compliance and we are at 99% tax compliance as of today."
"The accuracy and reliability of output from Thomson Reuters ONESOURCE Indirect Tax Determination has been very accurate and reliable for us, I have trusted it pretty much exclusively and have had no problems with it at all."
"It is a very good tool for any clients looking to calculate their taxes, and they can easily calculate the tax and submit their filings on time."
"We are using Thomson Reuters ONESOURCE Indirect Tax Determination for our client purpose mainly and it has been fantastic in our growth in our company."
"Thomson Reuters ONESOURCE Indirect Tax Determination has positively impacted my organization by shifting it from a manual process to a more automated process."
 

Cons

"I wish we would have phone support, but for the most part, there have been a few times where I have had to re-explain what the issue is or they were trying to close my cases before they were resolved."
"Avalara does not yet have an automated way of handling "multiple points of use", at least the way we have it installed."
"Customer support from Avalara could use some work."
"Avalara's pricing and approach to contract terms can be difficult to navigate, and this is an area where they could improve in the future."
"Avalara can be improved, and the teams have a few examples of things that they wish it could do better, such as better filing with the states."
"Their support team is not responsive and kind of avoids my questions when I'm asking."
"Even though the features are valuable, some of the configuration and custom rule functionality can be a bit difficult to understand."
"My suggestion is for Thomson Reuters to quickly provide solutions so that they can have a good name in the market."
"For custom rules, there is some complexity in the custom rules creation."
 

Pricing and Cost Advice

"​The products are worth considering, especially when doing business in a lot of states. Once it is functioning correctly, it can save a lot of time.​"
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Top Industries

By visitors reading reviews
Manufacturing Company
15%
Financial Services Firm
13%
Outsourcing Company
13%
Comms Service Provider
7%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business3
Midsize Enterprise2
Large Enterprise6
No data available
 

Questions from the Community

What is your experience regarding pricing and costs for Avalara?
After negotiation, it feels fair, but it also feels like they nickel and dime. There's an additional charge for every single thing. I feel like that's an outdated form of pricing where most compani...
What needs improvement with Avalara?
Their support team is not responsive and kind of avoids my questions when I'm asking. Definitely upgrading their support system would be appreciated. If the nickel and diming pricing wasn't a conce...
What is your primary use case for Avalara?
I use Avalara to calculate sales tax on our SaaS invoices. The system does it for me, so I don't have to spend a lot of time doing the complex calculations myself or looking into the different juri...
What needs improvement with Thomson Reuters ONESOURCE Indirect Tax Determination?
Even though the features are valuable, some of the configuration and custom rule functionality can be a bit difficult to understand. There is a lot you can do with the product, but sometimes it is ...
What is your primary use case for Thomson Reuters ONESOURCE Indirect Tax Determination?
Our primary use case for Thomson Reuters ONESOURCE Indirect Tax Determination is indirect tax determination, mainly sales and using it for tax and VAT. We have OneSource integrated with our SAP env...
What advice do you have for others considering Thomson Reuters ONESOURCE Indirect Tax Determination?
I rate Thomson Reuters ONESOURCE Indirect Tax Determination a nine on a scale of one to ten. Very few products are actually perfect tens, as there is always room for improvement even if consumers d...
 

Overview

 

Sample Customers

Adidas, Citrix, Porsche, Remington, Du Pont, Breitling, Quiznos, Bausch Lomb, The Salvation Army, Xerox, Reebok, Birkenstock, USA Today, K2 Sports
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Find out what your peers are saying about Avalara vs. Thomson Reuters ONESOURCE Indirect Tax Determination and other solutions. Updated: September 2026.
919,894 professionals have used our research since 2012.