RFP vs RFI vs RFQ:what is the difference?
An RFI, RFQ, and RFP are three procurement documents used at different stages of a buying process. An RFI (request for information) gathers early market and vendor information. An RFQ (request for quotation) compares price for well-defined requirements. An RFP (request for proposal) asks vendors to propose how they would solve a need, scored on more than price alone.
The short answer
All three are formal requests a buyer sends to suppliers, but they ask for different things at different points in the process:
- RFI: "Tell us about your company and what you can do." Used early, to learn the market and build a shortlist.
- RFQ: "Here is exactly what we need. What will it cost?" Used when requirements are fixed and price is the main variable.
- RFP: "Here is our problem. Propose how you would solve it, and on what terms." Used for complex purchases scored on capability, approach, risk, and price.
RFI: request for information
An RFI is an information-gathering exercise, not a buying commitment. The buyer is still scoping the problem and wants to understand who is in the market, what they offer, and roughly how they approach it. Responses are usually short and qualitative.
For a supplier, an RFI is a chance to get on a shortlist and shape how the buyer frames the eventual RFP. Answers should be clear and credible rather than heavily priced, because pricing is rarely the point at this stage.
RFQ: request for quotation
An RFQ is used when the buyer already knows precisely what they want and the main question is cost. Requirements are specified tightly enough that suppliers can be compared on price and commercial terms for a like-for-like deliverable.
RFQs are common for commodities, well-defined services, or repeat purchases. Because the specification is fixed, the response is mostly numbers: unit prices, totals, lead times, and terms.
RFP: request for proposal
An RFP is used for purchases where the solution is not obvious and the buyer wants suppliers to propose an approach. The buyer scores responses against multiple criteria, so the best answer is not always the cheapest one.
RFPs are the most demanding to respond to. They typically include detailed questions about capability, methodology, implementation, security, references, and price, and they often fold in a security questionnaire or due-diligence section.
How they fit together
These documents often run in sequence rather than in isolation. A common pattern is to issue an RFI first to survey the market and shortlist suppliers, then follow with an RFP for a complex solution or an RFQ for a well-specified, price-driven purchase.
- 1RFI: explore the market and shortlist credible suppliers.
- 2RFP or RFQ: evaluate the shortlist in detail, by proposal or by price.
- 3Selection and contract: choose a supplier and agree terms.
What it means when you are the one responding
Read the request type before you start, because it tells you what the buyer is actually deciding. An RFI wants concise, confident information. An RFQ wants accurate pricing against a fixed spec. An RFP wants a persuasive, well-evidenced proposal.
Across all three, the same standard questions recur: who you are, how you operate, how you protect data, and what you charge. A maintained answer library means you reuse approved responses instead of rewriting them each time, whatever the request is called.
Frequently asked questions
What is the main difference between an RFP and an RFQ?
An RFQ asks for price against requirements the buyer has already defined, so suppliers compete mainly on cost. An RFP asks suppliers to propose how they would meet a need and is scored on several criteria, such as capability, approach, risk, and price, not on price alone.
Does an RFI come before an RFP?
Often, yes. Buyers commonly issue an RFI first to understand the market and shortlist suppliers, then send a more detailed RFP (or RFQ) to that shortlist. The two are not always sequential, but an RFI is typically the earlier, lower-commitment step.
Do I need to answer pricing in an RFI?
Usually only at a high level, if at all. An RFI is about information and fit, so detailed pricing is normally requested later in an RFP or RFQ. Indicative ranges can help, but firm quotes are rarely expected at the RFI stage.
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