computer science

VXT

VXT is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand VXT rather than just read about it. In short: VXT (pronounced "vext") is a New Zealand Voice over IP (VoIP) company founded in 2018 to transcribe voicemail to text. The transcription service was discontinued in 2025 and the company now focuses on VoIP software for businesses.

Key takeaways

VXT belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect VXT to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of VXT from memory before moving on to harder problems.

Reference excerpt

VXT (pronounced "vext") is a New Zealand Voice over IP (VoIP) company founded in 2018 to transcribe voicemail to text. The transcription service was discontinued in 2025 and the company now focuses on VoIP software for businesses.

History VXT was founded in the summer of 2018/2019 and was launched in October 2019 by University of Canterbury students Luke Campbell and Lucy Turner. VXT participated in the university's summer startup programme which lasted for 10 weeks. They joined the Google Cloud Platform for Startups, covering up to $150,000 in Google costs and were awarded the equivalent of $19,000 at the university's Entré’s 85k Challenge. Starting in December 2019 they participated in Vodafone's Xone startup accelerator programme. The company originally provided a service named VXT Voicemail that transcribed voicemail to text. When a user missed a call, the voicemail was recorded on VXT servers, transcribed to text using a Google speech recognition product, and then that text was sent to the user, either by text or email. In November 2019 users could use the transcription service for free for up to 15 voicemails a month, but for up to 80 transcriptions they had to pay $5.99 per month, and for $20 a month could receive an unlimited number of transcribed voicemails. In March 2021 the company began offering the phone call recording and transcription service VXT Call, aimed at people who work in the fields of law and recruitment. VXT began focussing on the call service as it was receiving 50–100 times more income per customer than VXT Voicemail. In 2024 VXT announced that it would discontinue VXT Voicemail in 2025 after pivoting from a business-to-consumer (B2C) voicemail transcription company to a business-to-business (B2B) Voice over IP phone system. In September 2020 VXT raised $600,000. In July 2021 VXT Voicemail had 10,000 users across five countries and the company had six full-time employees. As of February 2024 the annual recurring revenue is $1.3 million and over 200 legal firms use VXT. In April 2024 the company raised $1.8 million in a pre-series A funding round, led by the Auckland-based venture capital firm GD1. In early 2025 VXT raised $2.5 million, valuing the company at $45 million.

Awards In 2021 Campbell was a finalist for the Momentum Student Entrepreneur award. In 2025 Campbell and Turner were listed in the annual Forbes 30 Under 30 list for Asia in the AI category. In 2025 he was a finalist for EY New Zealand's Entrepreneur of the Year.

References

Worked examples

Example 1 — a first encounter with VXT

Start with the simplest possible case. Write down what VXT claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to VXT before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about VXT ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of VXT

In research: VXT appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses VXT in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: VXT is common in secondary-school and first-year university syllabi. It links to neighbouring topics Companies based in Christchurch, New Zealand companies established in 2018, Software companies established in 2018, so understanding it makes those chapters shorter.
In everyday life: Look for VXT outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study VXT in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what VXT means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain VXT out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is VXT in simple terms?

Why does VXT matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study VXT?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on VXT.

VXT