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Adsum

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Reviews by verified Xero users.
5.0 out of 5 stars
103 Reviews

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CS
Charlie South
Posted 11 Nov 2025
5 out of 5 stars

Very Helpful Tool

Adsum provides a convenient window into the messy world of HMRC. The platform is easy to setup, with a pro-active team behind it. Saves time and effort checking individual balances, and simplifies admin around logins and access codes!
RC
Robert Collings
Posted 4 Nov 2025
5 out of 5 stars

Much easier to use than HMRC

Looking at tax positions for clients in HMRC is a lot of clicking around and takes a fair bit of time, but Open Tax shows everything in one dashboard. Much easier to log into Open Tax and see everything in one view!
RL
Romy Lewis
Posted 27 Oct 2025
5 out of 5 stars

Helpful, Time Saving Software

It is really helpful to see all of our clients tax positions in one place. It enables us to be proactive when advising clients and it saves a lot of time. I am also looking forward to seeing how this software progresses with the use of AI.
DB
Darren Buckley
Posted 24 Oct 2025
5 out of 5 stars

An Accountants Dream!

An immensely intuitive solution that powers accountants to be the proactive advisor their client needs when it comes to tax compliance. Having this single platform to connect our agent accounts has meant we are able to spot any issues way before the fact, saving them from potential penalties.
LG
Luke Green
Posted 24 Oct 2025
5 out of 5 stars

Really Helpful Tool

The OpenTax feature gives a great overview of our clients tax affairs and allows us to be proactive with clients advising when taxes are becoming due and overdue. This is an app that definitely provides useful time saving opportunities and increases proactiveness when advising clients!
MC
Michael Cloke
Posted 23 Oct 2025
5 out of 5 stars

Intuitive and helpful tool

Opentax is a really helpful tool for seeing everything in one place. It simply doesn't exist on HMRC (or anywhere else that I've found for that matter) so it's a great overview on all the tax positions for all of our clients all at once and I'm excited to see how they keep building out the agentic AI side.
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