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Blog

Thoughts on AI, automation, and accounting from the Briefcase team.

  1. Product

    Introducing Briefcase Ledger

    Briefcase Ledger is the AI-native, full-stack accounting platform that captures the paperwork, closes the books, and files the returns.

    Reuben SteenkampCEO and co-founder, BriefcaseSee Reuben's posts6LinkedIn7 min read

  2. Engineering

    Interviewing at Briefcase

    We hire only for individual contributor roles and evaluate a single criterion: is the person likely to raise the bar in at least one area? Here is what the engineering interview process looks like, start to finish.

    Jan StehlikCTO and co-founder, BriefcaseSee Jan's posts6LinkedIn4 min read

  3. Company

    MTD is a labour problem, not a software problem

    Less than one third of the sole traders and landlords required to comply with MTD have signed up so far. The problem is not a lack of software. We believe it is something much more foundational: who is going to do the work?

    Sam MetholdFounding GTM, BriefcaseSee Sam's posts2LinkedIn7 min read

  4. Product

    Introducing Briefcase Ledger

    From 6 April 2026, 864,000 sole traders must file quarterly digital updates with HMRC. Today we're launching Briefcase Ledger: a standalone MTD platform with automated reconciliation, document capture and direct HMRC submission.

    Sam MetholdFounding GTM, BriefcaseSee Sam's posts2LinkedIn8 min read

  5. Engineering

    Building autonomous evaluation pipelines for retrieval

    Hand-labelling retrieval datasets doesn't scale. We built an LLM-powered labelling agent to evaluate retrieval quality automatically.

    Che TheakerFounding Engineer, BriefcaseSee Che's posts1LinkedIn7 min read

  6. Engineering

    Build for verification, not review

    How reinforcement learning with verifiable reward is reshaping AI, and why building for verifiability is the key to becoming a truly AI native company.

    Jan StehlikCTO and co-founder, BriefcaseSee Jan's posts6LinkedIn7 min read

  7. Engineering

    Our culture

    A company is just a group of people. Briefcase is a group of people that are naive enough to think we will change the world.

    Jan StehlikCTO and co-founder, BriefcaseSee Jan's posts6LinkedIn5 min read

  8. Engineering

    Building Tax-Aware AI

    When an AI agent classifies a transaction's VAT treatment, it shouldn't be guessing—it should cite the exact HMRC guidance it relied on.

    Sara CapdevilaFounding Engineer, BriefcaseSee Sara's posts1LinkedIn12 min read

  9. Engineering

    Why build what you can buy?

    Most startups avoid spending engineering cycles on internal tools. Meanwhile, we built an internal LLM Observability platform. Here's why.

    George HallFounding Engineer, BriefcaseSee George's posts1LinkedIn10 min read

  10. Engineering

    Building autopilot

    Probabilistic AI agents paired with deterministic formal verification create the perfect combination for high trust domains like finance and accounting.

    Jan StehlikCTO and co-founder, BriefcaseSee Jan's posts6LinkedIn15 min read

  11. Product

    Introducing AI Autopilot

    Today, we're releasing our biggest feature yet: AI Autopilot. Autopilot evaluates uploaded transactions and determines whether they're safe to publish directly to ledgers.

    Reuben SteenkampCEO and co-founder, BriefcaseSee Reuben's posts6LinkedIn5 min read

  12. Engineering

    Everyone codes

    At Briefcase, we are product-obsessed. Every team member provides customer support, everyone contributes to our product roadmap, and everyone, including our commercial people, codes.

    Jan StehlikCTO and co-founder, BriefcaseSee Jan's posts6LinkedIn6 min read

  13. Engineering

    Building a Vertical AI Agent

    How Briefcase constructs AI agents for the accounting industry, emphasizing predictability, consistency and accuracy.

    Jan StehlikCTO and co-founder, BriefcaseSee Jan's posts6LinkedIn8 min read

  14. Product

    Introducing 'Contextual Learning' in the world of AI Accounting

    Generative AI offers substantial efficiency improvements, yet foundational models lack specific business knowledge. Contextual Learning provides the solution.

    Reuben SteenkampCEO and co-founder, BriefcaseSee Reuben's posts6LinkedIn10 min read

  15. Company

    How can you trust an AI to do your accounting?

    LLMs are inherently probabilistic, so how can you trust them with deterministic accounting workflows? We cover self-reflection, explainability and auditability in AI.

    Reuben SteenkampCEO and co-founder, BriefcaseSee Reuben's posts6LinkedIn5 min read

  16. Company

    What is an 'AI Agent' and what does it mean for accountants?

    AI agents are advanced AI systems designed to interact with their environment autonomously. Unlike conversational AI, these systems operate through integrated infrastructure.

    Reuben SteenkampCEO and co-founder, BriefcaseSee Reuben's posts6LinkedIn4 min read

  17. Company

    How will multimodal AI transform the accounting industry?

    Recent AI advancements have introduced Gemini 1.5 and GPT-4o, highlighting multimodal capabilities as the new standard in AI.

    Reuben SteenkampCEO and co-founder, BriefcaseSee Reuben's posts6LinkedIn4 min read

Guides

16 guides

MTD for ITSA4

Comparisons7

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Practice automation5