Compare · Cassandra Research
Cassandra Research alternatives for New Zealand accountants
Cassandra Research is an Australian AI tax and legal research workspace covering 23 jurisdictions, including New Zealand, with a tax engine and a legal engine for each. If you’re weighing an alternative, compare where answers come from, how you check them, where you can use them and how your firm’s data is secured. Here’s how Nylon and five other options compare, and when Cassandra is still the better fit.
Nylon vs Cassandra Research: the short answer
As at 22 October 2026. Nylon’s prices are in New Zealand dollars; Cassandra’s are in Australian dollars (A$). Details and sources below.
Cassandra Research
Nylon
Works in
The Cassandra web app, with ChatGPT, Claude and others inside it
Nylon, plus Claude, ChatGPT and Copilot (Adviser and Elite)
Certifications
Claims SOC 2 control alignment; no audit report or ISO certificate listed
SOC 2 Type I and II audited; ISO 27001 and ISO 42001 certified
Price ex GST
Pro A$45 or Elite A$99 per seat a month
$39, $99 or $199 per user a month
NZ sources
A New Zealand Tax engine; its NZ sources aren’t named
NZ legislation, Inland Revenue guidance and case law
Jurisdictions
23, including New Zealand, Australia, the UK and the US
New Zealand, Australia and the UK
Choose Nylon for cited answers from New Zealand primary sources, in the AI tools you already use, with audited security. Choose Cassandra if you research well beyond New Zealand, Australia and the UK, or want its Australian deed and agreement drafting.
Each vendor’s own website is the source for its column.
The best Cassandra Research alternatives at a glance
What each product says about itself on its own website, as at 22 October 2026. Prices exclude GST unless stated.
Nylon
Cited AI answers from New Zealand primary sources, in Nylon or your AI assistant
Yes, on every plan
$39, $99 or $199 per user a month
CCH iKnowConnect
The New Zealand Master Tax Guide and CCH commentary
Yes
$1,045.19–$5,792.68 a year incl. GST, for 1 user
Thomson Reuters Checkpoint
Editor-written commentary and compliance material for New Zealand
Not described on its New Zealand product page
Quote-based
Lexis+ with Protégé
Broad legal research, with CaseBase citation checks
Yes
Quote-based
Inland Revenue’s Tax Technical site
Inland Revenue’s own interpretation of tax law, and Tax Information Bulletins
Not described on the Tax Technical site
Free
ChatGPT or Claude on their own
Quick drafting where nobody needs to trace the source
Only with web search on
Free and paid plans
Why New Zealand accountants choose Nylon over Cassandra
Cassandra Research is broad: 23 jurisdictions and dozens of Australian drafting tools. Nylon is built for cited answers from New Zealand law itself, wherever you work.
Research inside your AI assistant
Adviser and Elite seats bring Nylon into Claude, ChatGPT and Microsoft Copilot, with every answer cited. Cassandra works the other way round: it offers ChatGPT, Claude and other models inside its own workspace. A connector for your assistant is not described on Cassandra Research’s public pages.
Audited and certified
Nylon is SOC 2 Type I and Type II audited, and ISO 27001 and ISO 42001 certified. Cassandra’s trust centre lists its registration as an Australian Taxation Office digital service provider and its privacy policy; its Suite page mentions “SOC 2 control alignment”. A SOC 2 report or ISO certification is not described on Cassandra Research’s public pages.
A New Zealand library you can see
Nylon publishes what it answers from: New Zealand legislation, Inland Revenue guidance, and decisions from New Zealand courts and tribunals. Every citation links to the source. Cassandra’s New Zealand Tax engine covers “legislation, regulatory guidance and practical questions”; which New Zealand sources it searches is not described on Cassandra Research’s public pages.
Try it free, pay in NZ dollars
Start a free 7-day trial when you sign up, then pay monthly from $39 per user (ex GST), in New Zealand dollars. Cassandra publishes its prices in Australian dollars, and a free trial isn’t described on Cassandra Research’s public pages: you sign in to view plans, or book a call.
1. Nylon
Nylon: cited AI answers from New Zealand primary sources
Nylon answers tax and law questions from New Zealand legislation, Inland Revenue guidance, and court and tribunal decisions, and links every citation to the source.
Cited answers
Every answer comes with hyperlinked citations to the primary source.
New Zealand library
New Zealand legislation, Inland Revenue guidance, and decisions from New Zealand courts and tribunals.
Drafting and review
Draft advice letters, research memos and tax opinions, or upload client documents and ask what matters.
In your AI tools
Adviser and Elite seats include Nylon’s AI connector for Claude, ChatGPT and Microsoft Copilot.
Pricing
Starter $39, Adviser $99 and Elite $199 per user per month, ex GST. Billed monthly; cancel anytime. Free 7-day trial. Enterprise pricing on request.
Nylon
When does a person become a New Zealand tax resident?
A person is a New Zealand resident if they have a permanent place of abode in New Zealand, even if they also have one elsewhere [1]. They’re also resident once they’ve been present for more than 183 days in total in a 12-month period, backdated to the first of those days [2].
1
Income Tax Act 2007, s YD 1(2)
2
Income Tax Act 2007, s YD 1(3) and (4)
Illustrative example
Benchmark · October 2026
4.68 / 5
Nylon’s composite score on 91 CPA Program Australia Taxation questions, each graded blind against an expert reference answer.
Nylon
4.68
Claude Fable 5.1
4.32
GPT-6 Astra
4.28
Australian tax, compared with five general AI models. Specialist tools, including Cassandra Research, weren’t tested.
Nylon vs Cassandra Research, side by side
As at 22 October 2026. The Cassandra column comes from Cassandra Research’s website.
Where you use it
The Cassandra web app, which offers ChatGPT, Claude, Gemini and other models inside it, with Gmail, Outlook and Xero connections where configured. A connector for AI assistants isn’t described on Cassandra Research’s public pages.
Nylon on the web, and Claude, ChatGPT and Microsoft Copilot through the AI connector (Adviser and Elite).
Contract
Billed monthly; cancel anytime. Renews automatically until you cancel.
Monthly. Cancel anytime.
Price (ex GST)
Pro A$45 or Elite A$99 per seat a month, plus GST, in Australian dollars. Teams and enterprise: “Let’s talk”. Cassandra advertises 25% off the first 12 months for verified CA ANZ members.
$39, $99 or $199 per user a month, in New Zealand dollars. Enterprise: quote.
AI answers
Specialist tax and legal engines, with advanced and deep research modes; Elite adds stronger reasoning models. Cassandra describes cited sources and asks you to check each one against the authority.
Fast and research modes on every plan, plus deep research on Adviser and Elite. Every answer links each citation to the primary source.
What answers draw on
Its New Zealand Tax engine covers “legislation, regulatory guidance and practical questions”, including Inland Revenue rulings and disputes. Which New Zealand sources it searches isn’t described on Cassandra Research’s public pages.
Nylon’s library: New Zealand legislation, Inland Revenue guidance, and decisions from New Zealand courts and tribunals.
Jurisdictions
23: Australia plus 22 overseas, each with a tax and a legal engine, including New Zealand, the UK, the US, Canada and Asia-Pacific. Cross-border matters run as separate country briefs.
New Zealand, Australian and UK tax legislation and guidance in one library.
Expert commentary
An editorial commentary service isn’t described on Cassandra Research’s public pages. Its free website knowledge base summarises selected Australian rulings, provisions and cases.
No editorial commentary. Nylon answers from the primary sources.
Practical tools
34 specialist tools, 23 deed and agreement engines and six financial engines, all built for Australian matters. Specialist tools for New Zealand matters aren’t described on Cassandra Research’s public pages.
No deed or agreement engines. Nylon drafts advice letters and memos, and reviews uploaded documents.
Trial
A free trial isn’t described on Cassandra Research’s public pages. Sign in to view plans, or book a call.
Free 7-day trial when you sign up, or book a demo.
What you gain with Nylon
Nylon inside Claude, ChatGPT and Microsoft Copilot (Adviser and Elite)
SOC 2 Type I and Type II audits, and ISO 27001 and ISO 42001 certification
A published New Zealand library, with every citation linked to the source
A free 7-day trial, then plans from $39 per user a month (ex GST), in New Zealand dollars
What you give up
Research in 20 more jurisdictions, including the US, Canada and Asia-Pacific
Cassandra’s 34 specialist tools and 23 deed and agreement engines for Australian matters
ChatGPT, Claude, Gemini and other general models in the same workspace
Test Nylon on your own Cassandra questions
Bring three questions you researched in Cassandra Research this month. In the demo, we’ll answer them in Nylon with every source linked.
Other Cassandra Research alternatives
Each summary comes from the product’s own website, as at 22 October 2026.
2
CCH iKnowConnect
Wolters Kluwer’s tax and legal research platform, with the New Zealand Master Tax Guide, CCH commentary and built-in AI: AI-Powered Q&A, an AI Assistant and AI-generated summaries, with citations.
Best for
Firms whose work runs on CCH commentary and the Master Tax Guide.
Pricing
$1,045.19, $2,106.93 or $5,792.68 a year incl. GST for 1 user, up to $11,585.34 for 3 users, with a 12-month lock-in. 4+ users: quote.
Consider it if
You want editor-written commentary alongside AI answers.
3
Thomson Reuters Checkpoint
Thomson Reuters’ online tax and accounting information service built for New Zealand: legislation, commentary and compliance requirements, written by tax, accounting and legal specialists.
Best for
Firms that want editor-written commentary from another publisher.
Pricing
Quote-based: individual titles, your own pack or a practice area package. Free demo or trial on request.
Consider it if
You want human-written commentary more than AI answers. Its New Zealand product page doesn’t describe AI answers.
4
Lexis+ with Protégé
LexisNexis’s legal AI for research, drafting and analysis, formerly Lexis+ AI. Its answers are grounded in LexisNexis content, with CaseBase citation checks.
Best for
Law firms, barristers and in-house teams doing broad legal research.
Pricing
Quote-based; free demo on request.
Consider it if
Your work is mostly legal rather than tax. Its New Zealand pages are written for legal professionals rather than accountants.
5
Inland Revenue’s Tax Technical site
Inland Revenue’s technical website publishes the Commissioner’s interpretation of tax law, including case summaries, summaries of private rulings and the monthly Tax Information Bulletin. You can also apply there for a binding ruling.
Best for
Checking Inland Revenue’s own view, free.
Pricing
Free.
Consider it if
You need Inland Revenue’s published position and are happy to search for it yourself.
6
ChatGPT or Claude on their own
General AI assistants that answer from their training data and, when it’s on, web search. OpenAI’s help centre warns that ChatGPT’s citations can be incomplete, outdated or incorrect.
Best for
Quick drafting and orientation where nobody needs to trace the answer.
Pricing
Free and paid plans.
Consider it if
You add Nylon’s AI connector, so they search Nylon’s library and cite the source.
Which should you choose?
Match the tool to the work you do most.
If you want cited answers from the law itself
Nylon
In Nylon or in Claude, ChatGPT and Copilot, billed monthly in New Zealand dollars.
If you research across many countries
Cassandra Research
23 jurisdictions, plus deed and agreement drafting for Australian matters.
If your work runs on CCH’s guides
CCH iKnowConnect
The New Zealand Master Tax Guide and CCH commentary.
If you want commentary from another publisher
Thomson Reuters Checkpoint
Editor-written New Zealand commentary and compliance material.
If your work is mostly legal
Lexis+ with Protégé
Broad legal research with CaseBase.
If you only need Inland Revenue’s view
Inland Revenue’s Tax Technical site
Free: the Commissioner’s interpretation and the monthly Tax Information Bulletin.
Security your firm can check
Nylon is SOC 2 Type I and Type II audited, and ISO 27001 and ISO 42001 certified.
Independently audited
SOC 2 Type I and Type II reports are available, and Nylon holds ISO 27001 and ISO 42001 certification.
Encrypted
All data that passes through Nylon is encrypted in transit and at rest.
Not used for training
Your questions and Nylon’s answers aren’t shared, and your inputs are never used to train AI models.
Admin controls
Every plan includes advanced organisational controls.
Baqir Hussein, FCCA · Founder & Director, Finex Chartered Certified Accountants
Cassandra Research alternatives: frequently asked questions
Questions about switching? Book a demo or email support@usenylon.com.
What is the best alternative to Cassandra Research?
If you want cited AI answers from New Zealand primary sources, Nylon: it links every answer to the source, works inside Claude, ChatGPT and Copilot, and is SOC 2 audited and ISO 27001 certified. If your work runs on commentary, CCH iKnowConnect or Thomson Reuters Checkpoint. For broad legal research, Lexis+ with Protégé. For the Commissioner’s own view, free, Inland Revenue’s Tax Technical site.
What does Cassandra Research cover for New Zealand?
As at 22 October 2026, Cassandra Research has a New Zealand Tax engine and a New Zealand Legal engine, among 23 jurisdictions. Cassandra says the tax engine covers New Zealand income tax, GST and Inland Revenue procedure. Its 34 specialist tools and 23 deed and agreement engines are built for Australian matters.
How does Cassandra Research pricing compare with Nylon?
As at 22 October 2026, excluding GST: Cassandra Pro costs A$45 and Elite A$99 per seat a month, in Australian dollars, and team plans are by discussion. Cassandra also advertises 25% off the first 12 months for verified CA ANZ members. Nylon costs $39, $99 or $199 per user a month in New Zealand dollars, and the AI connector comes with Adviser and Elite. Both bill monthly, and you can cancel anytime.
Does Nylon cover the US, Asia or Europe?
No. Nylon covers New Zealand, Australian and UK tax legislation and guidance. For research in the US, Canada, Asia-Pacific or Europe, Cassandra Research lists engines for 22 overseas jurisdictions.
Can I use Nylon alongside Cassandra Research?
Yes. Both bill monthly, so you can run them side by side and compare them on your own questions.
Does Nylon have a free trial?
Yes. Start a free 7-day trial when you sign up, or book a demo to see Nylon on your own questions. Plans are monthly and you can cancel anytime. A free trial isn’t described on Cassandra Research’s public pages.
Can I use Nylon in ChatGPT, Claude or Copilot?
Yes, with an Adviser or Elite seat. Nylon’s AI connector lets those assistants search Nylon’s library and cite the source.
Is Nylon secure enough for client work?
Nylon is SOC 2 Type I and Type II audited, and ISO 27001 and ISO 42001 certified. Data is encrypted in transit and at rest, and your inputs are never used to train AI models.
Keep exploring
Nylon for accountants
Research, drafting and review for accounting firms.
Tax research benchmark
91 Australian tax questions, six systems, graded blind.
AI connectors
Nylon in Claude, ChatGPT and Copilot.
Plans
Starter, Adviser and Elite, billed monthly.
Information about other products comes from their own websites as at 22 October 2026 and can change. Prices are in New Zealand dollars. Cassandra Research’s prices are in Australian dollars, marked A$. Cassandra Research is a trade mark of Cassandra Research Pty Ltd. Other product names belong to their owners. Nylon isn’t affiliated with or endorsed by any of them. Nylon’s October 2026 benchmark compared general AI models, not the other products on this page. Spotted something out of date? Email support@usenylon.com.