Two funnels, one platform
Every marketplace has two conversion funnels running simultaneously, and they are interdependent in ways that make optimising one without the other ineffective.
The seller funnel: potential seller discovers the platform → evaluates whether it's worth their time → creates a listing → maintains the listing → becomes an active, high-quality supply contributor. Each step in this funnel has its own conversion rate, its own friction points, and its own set of interventions that improve it.
The buyer funnel: visitor arrives → discovers relevant supply → evaluates a listing → contacts the seller or transacts → returns for future purchases. Again, each step has its own conversion rate and its own failure modes.
The two funnels interact: poor seller conversion produces thin supply, which produces poor buyer discovery, which produces low buyer conversion, which reduces seller motivation to maintain listings, which further reduces supply quality. A marketplace in this spiral cannot be fixed by optimising one funnel in isolation.
Seller acquisition conversion
Seller acquisition fails at three main points. First, the seller value proposition page — often called "sell with us" or "list your item" — doesn't make a compelling case for why this platform is worth the seller's time compared to the alternatives. It leads with platform features rather than seller outcomes.
Second, the listing creation flow is too complex. Sellers abandon listings when the creation process requires too many fields, too many steps, or forces decisions they're not ready to make. Every field that isn't essential to the buyer's search is a potential abandonment point.
Third, time-to-first-signal is too long. A seller who creates a listing and receives no engagement for two weeks has no reason to believe the platform is working. Building in earlier feedback — listing views, saves, or a "your listing is live and being seen" notification — maintains seller motivation through the early period before first contact.
Buyer-to-transaction conversion
Buyer conversion fails most predictably at the listing page — the moment of highest intent and highest friction. The buyer has done the work of finding a relevant listing. The conversion barrier at that point is purely trust: trust in the seller, trust in the listing accuracy, trust in what happens after contact is made.
The search-to-listing conversion — the click-through rate from search results and category pages to listing pages — is also significant. Listing cards that don't surface the right signals produce low click-through regardless of the quality of the underlying supply. We address both: the card design that earns the click, and the listing page design that converts the click into contact.
The trust gap — where most transactions die
The trust gap is the moment between a buyer's decision to enquire and their actual act of enquiring. In that gap, doubt accumulates. Is this listing real? Is the price correct? What happens if I enquire and the item is no longer available? What are the payment terms? Will the seller respond?
Each of those doubts is addressable through design. Real listings are signalled through recency indicators and seller response rates. Price accuracy is supported through "price reduced" or "verified price" signals. Post-enquiry clarity comes from a clear description of the process. Response rates are displayed on seller profiles.
None of these interventions is novel. What is novel is building them into the architecture systematically rather than applying them as patches. A trust architecture designed from the start produces better conversion than the same signals bolted on after the fact.
How we work
Two-funnel audit
We map both funnels — seller acquisition and buyer-to-transaction — and identify the conversion rate at each step. We use analytics data where available and expert review throughout. We produce a prioritised list of interventions ordered by impact and effort.
Trust architecture review
We specifically audit the trust signals at each stage of the buyer journey — from the homepage through to the listing page — against the trust architecture framework. We identify which signals are missing, which are present but not prominent enough, and which are creating friction rather than reducing it.
Implementation
We implement the changes — design, copy, structure. For marketplaces on an embedded partner retainer, conversion optimisation is an ongoing programme: instrument, test, measure, iterate.
What you get
- Two-funnel conversion audit — seller acquisition and buyer-to-transaction
- Trust architecture review — signals mapped across the full buyer journey
- Seller value proposition improvements
- Listing creation flow simplification
- Listing page trust signal improvements
- Enquiry flow friction reduction
- Analytics instrumentation — all funnel steps tracked
- Ongoing conversion optimisation on retainer
A marketplace conversion problem is almost always a trust problem. The buyer found what they were looking for. The only thing stopping the transaction is insufficient confidence that it's safe to proceed.