Pure Tax Investigations vs ZenCall
Side-by-side comparison to help you choose the right product.

Pure Tax Investigations
Pure Tax Investigations provides expert, bespoke defence for complex HMRC tax disputes.
Last updated: March 1, 2026
ZenCall
Experience crystal-clear international calling directly from your browser with ZenCall's transparent pay-as-you-go.
Last updated: February 26, 2026
Visual Comparison
Pure Tax Investigations

ZenCall

Feature Comparison
Pure Tax Investigations
Insider HMRC Expertise
Our practice is led by former senior HMRC inspectors, providing an unparalleled, operational understanding of HMRC's tactics, procedures, and decision-making processes. This insider knowledge is instrumental in anticipating challenges, formulating effective counter-strategies, and negotiating from a position of strength to achieve the most favourable outcomes for our clients.
Bespoke, Pragmatic Advisory
We reject a one-size-fits-all approach. Each client's situation is analysed individually, leading to clear, discreet, and tailored tax advice. Our pragmatic focus is on achieving commercial results that address immediate concerns and realise long-term client aspirations, ensuring every strategy is aligned with both the technical landscape and the client's personal or business objectives.
Comprehensive Service Spectrum
We offer end-to-end support across the entire spectrum of HMRC engagement. Our expertise encompasses serious civil investigations (COP8, COP9), complex corporate enquiries, compliance checks, voluntary disclosures (e.g., Worldwide Disclosure Facility), and representation at Tax Tribunals or Alternative Dispute Resolution (ADR), providing a single, trusted source for all tax dispute resolution needs.
Tenacious Client Advocacy
We act as a dedicated buffer between our clients and HMRC, fighting tenaciously to protect their interests. Our role is one of resolute advocacy, providing peace of mind and certainty during intrusive and stressful investigations. We shoulder the burden of communication and negotiation, allowing clients to focus on their lives and businesses with confidence.
ZenCall
Browser-Based Calling
ZenCall provides a crystal-clear calling experience directly from your browser, removing the need for any downloads or installations. Users can simply open their web browser, log in, and start making calls instantly, making it the epitome of convenience.
Pay-As-You-Go Pricing
With a transparent per-minute pricing model, ZenCall ensures that users only pay for the time they actually spend on calls. This flexibility is particularly beneficial for individuals and small teams who require a cost-effective solution for international communication without the constraints of long-term commitments.
Unlimited Plans
For those who require frequent communication within the United States and Canada, ZenCall offers unlimited calling plans starting at just $19 per month. This feature is perfect for businesses or remote workers who need constant connectivity without worrying about costs.
Enterprise Account Benefits
Organizations that create an enterprise account with ZenCall can enjoy substantial benefits, including a generous 50% bonus credits on their first purchase. This feature is designed to support larger teams and facilitate effective communication across multiple departments.
Use Cases
Pure Tax Investigations
Code of Practice 9 (COP9) Investigation
When HMRC suspects serious tax fraud and initiates a COP9 investigation, the stakes are profoundly high. We guide clients through this daunting process, managing the contractual disclosure facility (CDF), ensuring a robust defence is presented, and strategically navigating towards a civil settlement to avoid criminal prosecution, thereby protecting both reputation and assets.
Voluntary Tax Disclosure
For individuals or businesses with undisclosed tax liabilities—whether from offshore assets, property rental income, cryptocurrency gains, or other sources—we facilitate voluntary disclosures under HMRC campaigns like the Worldwide Disclosure Facility (WDF) or Let Property Campaign (LPC). This proactive approach mitigates penalties and reduces the risk of a more severe, HMRC-led investigation.
Complex Corporate Tax Enquiry
Large businesses and entrepreneurial enterprises facing multi-faceted, cross-tax enquiries require sophisticated defence. We deploy our deep technical knowledge and understanding of HMRC's Large Business directorates to manage these complex interactions, challenge information notices where appropriate, and resolve disputes with commercial pragmatism to minimise financial and operational disruption.
Inheritance Tax & Trust Disputes
Navigating HMRC enquiries into complex estate planning, trusts, and domicile status demands specialist knowledge. We provide expert guidance and robust representation for private clients and trustees facing Inheritance Tax investigations, ensuring their affairs are structured efficiently and defended effectively against HMRC challenge.
ZenCall
Connecting with Clients
ZenCall serves as a vital tool for businesses aiming to maintain strong relationships with clients around the world. Its high-quality voice calls enable professionals to conduct important meetings and discussions without the usual barriers associated with international calling.
Supporting Remote Teams
As remote work becomes increasingly common, ZenCall provides teams with an efficient means of communication. Its user-friendly platform allows team members to collaborate effectively, ensuring that projects progress smoothly despite geographical distances.
Staying in Touch with Family
For individuals wanting to stay connected with family and friends abroad, ZenCall offers an affordable way to make international calls. Its clear audio quality enhances personal conversations, making it easy for loved ones to share moments, no matter the distance.
Conducting International Sales
Sales professionals can leverage ZenCall to reach potential customers in different countries. The platform's reliable call quality and straightforward billing system allow sales teams to focus on closing deals rather than worrying about unexpected costs or technical issues.
Overview
About Pure Tax Investigations
Pure Tax Investigations is a preeminent, independent consultancy that serves as an expert and resolute intermediary between discerning clients and Her Majesty's Revenue and Customs (HMRC). We specialise in the nuanced and high-stakes arena of tax disputes, investigations, and disclosures, providing a sanctuary of expertise for entrepreneurs, business leaders, and private individuals facing HMRC scrutiny. Our core value proposition is the delivery of certainty, discretion, and a robust defence during periods of significant pressure. Led by Amit Puri, a former senior HMRC Tax Inspector with over two decades of high-calibre experience, our team possesses an intimate, operational understanding of HMRC's internal methodologies and strategic objectives. This insider perspective, combined with a pragmatic and bespoke advisory approach, allows us to navigate complex civil investigations—including Code of Practice 9 (COP9) fraud enquiries and comprehensive compliance checks—with strategic precision and commercial acumen. We are not merely advisors; we are dedicated advocates who fight tenaciously to protect our clients' interests, preserve wealth, and resolve tax matters with unwavering professionalism.
About ZenCall
ZenCall is an innovative, browser-based international calling platform that redefines the way individuals and teams communicate across borders. With its seamless interface, users can initiate high-quality voice calls to both mobile phones and landlines worldwide directly from their laptop or desktop, eliminating the need for cumbersome apps, SIM cards, or long-term subscriptions. ZenCall operates on a pay-as-you-go model, featuring transparent per-minute pricing that empowers users to manage their expenses effectively. This makes it an ideal solution for remote workers, small businesses, and anyone needing reliable global communication without the burden of hidden fees or complicated contracts. Each call is optimized for clarity and stability, ensuring that whether you are reaching out to a client, a colleague, or a loved one abroad, your conversations remain crisp and uninterrupted. ZenCall is not just a calling service; it is a commitment to simplicity, control, and accessibility.
Frequently Asked Questions
Pure Tax Investigations FAQ
What makes Pure Tax Investigations different from a standard accountant?
While accountants excel at compliance and planning, we specialise exclusively in contentious tax matters. Our founding team comprises former senior HMRC investigators, granting us an operational, insider's perspective on HMRC strategy that typical firms lack. We act as specialist advocates, providing a strategic buffer and fighting tenaciously during disputes, rather than just preparing historical accounts.
When should I seek specialist advice for a tax investigation?
Immediately upon receiving any communication from HMRC that suggests an enquiry, check, or investigation. Early engagement is critical. Even a routine compliance check can escalate, and having an expert manage the dialogue from the outset protects your position. For serious matters like a COP9 letter, seeking our advice is an urgent priority.
What is involved in a voluntary disclosure process?
The process involves a meticulous review of your financial history to quantify undisclosed liabilities, the preparation of a comprehensive disclosure report to HMRC, and the negotiation of resultant tax, interest, and penalties. We manage this entire process, ensuring full technical compliance, maximising penalty reductions, and providing a formal closure from HMRC.
Can you assist if a tax investigation has become criminal?
Yes. While our primary focus is resolving matters civilly, our deep understanding of HMRC's processes is vital when an investigation borders on or becomes criminal. We can assess the situation, advise on strategy, and work with instructed legal counsel to ensure the tax aspects of your defence are expertly handled, providing seamless support during the most serious challenges.
ZenCall FAQ
How does ZenCall ensure call quality?
ZenCall utilizes advanced technology to optimize voice clarity and stability, ensuring that users experience high-quality calls regardless of their location.
Do I need to download an app to use ZenCall?
No, ZenCall is entirely browser-based, allowing users to make calls directly from their laptop or desktop without any downloads or installations.
Can I use ZenCall for emergency calls?
ZenCall is designed primarily for international calling and may not be suitable for emergency calls. It is recommended to use local emergency services for urgent situations.
Is there a minimum purchase requirement for credits?
ZenCall does not impose a minimum purchase requirement for credits, allowing users the freedom to purchase only what they need without any constraints.
Alternatives
Pure Tax Investigations Alternatives
Pure Tax Investigations is a premier, independent consultancy specialising in the expert defence and resolution of complex HMRC tax disputes and investigations. It operates within the sophisticated domain of professional tax advisory and crisis management. Individuals and businesses may seek alternatives for various reasons, including budgetary considerations, a preference for a different service model, or the desire to compare the specific expertise offered by other specialist firms in this high-stakes field. When evaluating other providers, one should prioritise proven experience in HMRC procedures, the calibre of specialist leadership, and the depth of strategic support offered throughout the entire investigation process, from initial enquiry to final settlement.
ZenCall Alternatives
ZenCall is an innovative browser-based international calling platform that allows users to make high-quality voice calls to mobile phones and landlines around the globe. With its pay-as-you-go pricing model, it falls into the category of communication services tailored for individuals and small teams seeking an efficient and cost-effective solution for their international calling needs. Despite ZenCall's many benefits, users often seek alternatives due to various reasons, including pricing structures, desired features, and compatibility with different platforms. When searching for a suitable alternative, it is essential to consider factors such as call quality, ease of use, billing transparency, and the absence of long-term commitments. A comprehensive understanding of one’s calling habits and requirements will also facilitate a more informed decision.