all about the best ai business valuations tool!

Written By Robert Wood

We have developed our own CustomGPT tool, designed to search a proprietary database of over 10,000 M&A transactions, with recorded EV/EBITDA multiples up to March 2025. This enables you to gain a clear view of the typical profit multiples achieved within your sector, should you wish to explore bringing your business to market.

To ensure relevance and precision, we have programmed our CustomGPT to:

  • Limit the results to the 5 most relevant transactions based on the information you provide.

  • Interactively ask targeted questions to better understand your business profile and sector, enabling a more refined search.

  • Search full transaction synopses, ensuring important nuances are captured beyond standard deal metrics.

  • Prioritise more recent transactions, similar business sizes, and closely aligned sectors to ensure comparability.

  • For each selected deal, the CustomGPT provides a brief rationale explaining why it was chosen, giving you clear visibility over the relevance of each example.

This approach allows you to benchmark more accurately against the most comparable and current transactions, supporting a stronger, evidence-based valuation narrative.

And because we’re super nice, here’s the URL so you can use the GPT yourself: https://chatgpt.com/g/g-6807c129de7c81919d5f4284b06050bb-m-a-comparative-deal-valuer (note, you do need a Pro ChatGPT subscription for this.

Here’s an example conversation:

Helpful Tips for Using the M&A Comparative Deal Valuer

  • Be Specific but Practical with Criteria:
    The more specific you are about industry, geography, size, and recency, the sharper the comparables will be. However, if you're too narrow, you may need to broaden parameters slightly to get a full set of comps.

  • Prioritise Recent Deals:
    Always ask for "as recent as possible" comparables. Market multiples shift quickly, and recent data provides the most credible benchmarks.

  • Industry Keywords Matter:
    The GPT searches through deal synopses using keywords. Include key descriptors like precision engineering, specialist manufacturing, B2B services, etc., to guide the search.

  • Use Size Filters Thoughtfully:
    If relevant, guide the GPT with rough revenue or EBITDA bands to make the comparables more meaningful to your specific valuation target.

  • Ask for a Written Summary:
    After pulling comparables, you can request a summary paragraph suitable for dropping straight into valuation reports or pitchbooks.

  • Watch for Outliers:
    If an extracted multiple looks unusually high or low, ask the GPT to flag or exclude outliers to improve the quality of the average multiple.

Follow-on Questions You Might Ask

  • "Can you provide a version excluding the highest and lowest multiple to reduce outliers?"

  • "Can you find deals from just the last 12 months?"

  • "Can you broaden to include 'industrial manufacturing' if too few precision engineering deals are found?"

  • "Can you show a high-level summary of the target businesses (e.g., revenue, employee size) if available?"

  • "Can you create a visual chart showing the range of EV/EBITDA multiples?"

  • "Can you draft a short paragraph summarising the comparable valuation for use in a report?"

  • "Can you suggest a proxy industry if there aren’t enough deals directly matching my criteria?"

That’s all on this CustomGPT, if you have any questions, or thoughts on this please do let us know :)

Robert Wood
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