RFI, RFQ, and RFP get used interchangeably often enough that it's worth being precise, because sending the wrong one wastes everyone's time — an RFP where an RFQ would do adds weeks to a decision that should take days, and an RFQ where you actually needed an RFP gets you price quotes with no way to evaluate anything else that matters. Understanding the difference between RFI vs RFQ vs RFP saves weeks on every sourcing decision.
RFI — Request for Information (RFI vs RFQ)
An RFI (Request for Information) is used when you don't yet know who can even do the work. An RFI asks potential suppliers about their capabilities, capacity, certifications, and experience — not price. It's a filtering step: "can you do this kind of job at all," before you spend time getting anyone to quote.
Use it when: you're sourcing a new category of work, entering a new supplier region, or building a shortlist before a bigger sourcing decision.
Skip it when: you already know which suppliers can do the work — which, for most repeat manufacturing purchases, you do. Sending an RFI to suppliers you've already qualified just adds a step.
The RFI vs RFQ distinction matters: an RFI gathers information, while an RFQ gathers prices. Most manufacturers use RFIs rarely and RFQs constantly.
RFQ — Request for Quote (RFQ vs RFP)
An RFQ (Request for Quote) is used when you know what you need and who can make it — you're asking for a price and lead time on a specific, well-defined job. This is the document for a known part, known spec, known quantity, going to suppliers you already trust to do the work. It's the fastest of the three because there's nothing to evaluate except price, lead time, and terms.
Use it when: the spec is locked, you know your supplier pool, and the decision genuinely comes down to price and delivery. This is the overwhelming majority of what a small manufacturer sources month to month.
Skip it when: the spec isn't final yet, or price isn't the only thing you're deciding on.
When comparing RFQ vs RFP: an RFQ is for known specs and known suppliers; an RFP is for unknown approaches and evaluation of more than just price.
RFP — Request for Proposal (RFI vs RFP vs RFQ)
An RFP (Request for Proposal) is used when the "how" is part of what you're evaluating, not just the price. An RFP asks suppliers to propose an approach — how they'd tackle a complex or non-standard job, what process they'd use, what value-adds they'd bring — alongside pricing. It's slower by design, because you're comparing approaches, not just numbers.
Use it when: you're sourcing something genuinely novel — a new product line, a complex assembly with multiple viable manufacturing approaches, a longer-term supplier relationship where process and partnership matter as much as unit price.
Skip it when: the job is routine. Running an RFP process on a standard machined part is significant overhead for a decision an RFQ would settle in days.
The RFI vs RFP vs RFQ distinction comes down to intent: RFI gathers information, RFQ gathers prices, RFP gathers proposals. Most manufacturers need RFQs for day-to-day work, RFIs for new sourcing, and RFPs only for major decisions.
The practical answer for most manufacturers
If you're sending 10–100 sourcing requests a month to suppliers you already work with, for parts with known specs — which describes most small and mid-size manufacturers' actual purchasing volume — you're running RFQs, not RFPs, almost all of the time. RFPs are for the occasional big, novel decision. RFIs are for expanding your supplier base. RFQs are the day-to-day engine, and they're the one worth building a real system around, because they're the one you're running constantly.
RFQTrace is built specifically for that day-to-day RFQ volume — create an RFQ, send it to your supplier list, get quotes back in a standard format, compare, award. Start a free 60-day pilot if that's the process eating most of your week.
Related reading:
- Self-Serve Supplier Portal vs Email — why a portal beats email back-and-forth for routine RFQs
- Why Your Supplier Quotes Expire Before You Decide — how validity windows cost you when you can't see expiry dates
- RFQ Tracker — track every quote request in one place