Generic advice fails because what counts as expensive varies by product. A consumer who gives an email address has given you almost nothing. An enterprise buyer who books a second meeting with their CFO has given you a great deal.
B2B software
B2B has the richest menu because the buying process is itself a series of commitments. In rough order of strength:
- A scheduled session with the economic buyer, not just the end user. Insist on a calendar invite with a named attendee.
- Access to real data or a real workflow, even read-only. This is a time and reputation commitment, because someone approves it internally.
- A letter of intent naming a price range and a target start date.
- A paid pilot. 100tasks treats paid pilots as standard validation evidence, and notes that a paid pilot validates willingness to test, not willingness to renew (100tasks). Price it small enough to clear a discretionary budget, large enough that someone signs.
- A reference call with another of their customers, or an intro to a peer at a comparable company.
Avoid the pilot with no money and no success criteria. That is free consulting for the buyer and a signal of roughly zero. If they will not pay, ask what internal approval payment would require, then ask for that introduction.
Consumer apps and prosumer tools
Consumer commitments are hard to make expensive, so manufacture cost. The staged approach of two hours on desk research, twenty hours on conversations or a landing page, and only then two hundred hours on a build is a useful discipline here (Isabella Pennington). Commitments worth counting:
- Joining a waitlist that requires a qualifying form, not just an email. The qualification is the cost.
- A refundable pre-order or deposit with a clear refund date.
- Referring a named friend who also signs up. KickoffLabs treats referrals as real validation because they move a signup from passive interest to advocacy (KickoffLabs).
- Booking a call. For consumer products this is a surprisingly high-cost ask and a good filter.
Be careful with waitlists. KickoffLabs says plainly that a signup is not a paying customer and warns against over-reading a waitlist (KickoffLabs). A thousand signups is a channel test. A deposit page that takes real cards is closer to proof.
Marketplaces
Marketplaces need two commitments, one per side, and supply is usually easier to test. A seller who lists an item commits time and, in many categories, reputation. Commitments to ask for:
- A real listing with real inventory and a real price, and whether they keep it live.
- A refundable booking fee from buyers. A fee converts curiosity into intent in a way a "notify me" button never will.
- A manual, concierge run for a small number of buyers before matching at scale. Harvard Innovation Labs describes this approach as validating problem and solution before automating (Harvard Innovation Labs).
Supply commitment predicts viability better than demand surveys, because a seller who lists inventory has thought about shipping, returns, and pricing. A buyer who says "I would use this" has thought about nothing.
Hardware and physical products
Hardware commitments are the most legible, because crowdfunding normalized the pre-order. Ask for:
- A refundable pre-order at a stated price with a delivery window you can miss gracefully.
- A paid prototype evaluation for a business buyer, invoiced at cost plus a small margin.
- A design partner agreement with a purchase order or committed quantity.
- For industrial products, a site visit where the customer shares measured operational data: downtime, throughput, cost per unit. That is a time and reputation commitment and often more valuable than a signature.
One caveat: pre-orders validate willingness to pay at a price, not at a cost. Run unit economics separately, because the classic hardware failure is a popular product with a negative margin.
Services and consulting
For services the commitment is the engagement. Stage it:
- A paid discovery session or diagnostic. This is the cleanest test: will they pay for your thinking before you have built anything?
- A signed scope for a small first engagement, with a deposit invoice.
- A public testimonial or a named referral, the highest-value commitment for a business whose whole acquisition channel is reputation.
Services have an advantage worth exploiting: deliver the first engagement manually and you learn more in two weeks than six months of research would teach you. Automate once you know which parts the customer values (Harvard Innovation Labs).