Request for Proposal (RFP)

A request for proposal is a written brief sent to several vendors at once, describing what the buyer needs and asking each supplier to respond in a fixed structure. Its purpose is comparability. Left to their own devices, vendors answer the questions they are strong at and skip the rest, and a buyer who takes three separate demos ends up with three incomparable impressions rather than one decision. A good RFP starts with the problem and the constraints rather than a wish list of features. Feature checklists reward whoever ticks the most boxes, and every mature product can tick most boxes, so the exercise degenerates into a scoring of marketing copy. Requirements written as outcomes — what a user must be able to accomplish, at what volume, within what latency, under which regulatory constraint — force answers that reveal how the product actually works. For AI-heavy tools, several sections earn their place. Where the model runs and who operates it. Whether your inputs and outputs are used for training, and how that is switched off. What happens to data at rest and in transit, and in which jurisdictions. How the vendor handles versions and deprecations, which is the difference between a stable dependency and a moving one. And how quality is measured, because a vendor with no answer there is measuring nothing. The failure mode of the format is length. An RFP long enough to be exhaustive is long enough that small vendors decline to answer it, which quietly narrows the field to whoever has a bid team, not whoever has the best product. It is also long enough that the answers get written by people who have never touched the product. Keeping it short enough to be answered honestly by an engineer is usually a better filter than any scoring rubric. Scoring should be agreed before the responses arrive. Weight the criteria, write down what a strong answer looks like, and have more than one person score independently. Deciding the weights after reading the submissions is how a preferred vendor gets chosen first and justified second, and everyone involved can usually tell that is what happened. An RFP is a screening instrument, not a decision. It narrows a long list to a short one, and the short list should then be tested against real work — your data, your edge cases, your integrations — because the gap between a confident written answer and a working integration is where most disappointing purchases live. Treat the document as the thing that earns a vendor a trial, and the trial as the thing that earns the contract.