Why Your Adalo Marketplace Needs Architecture Before Features
Every marketplace built on Adalo, Bubble, or a similar no-code tool eventually hits the same wall. Not a bug. Not a missing feature. A decision that was never made, surfacing at the worst possible time — usually right after the first real transaction goes wrong.
A marketplace is not a harder version of a single-sided app. It's a different category entirely, because the moment you connect two parties around money, three questions stop being optional: who's liable when something goes wrong, who owns the source of truth for a transaction's status, and what happens when a payment fails halfway through.
The pattern behind "just add a marketplace"
Founders rarely ask for architecture. They ask for a feature, and the feature request quietly assumes an answer to a much bigger question underneath it:
"Add a way for sellers to list items and buyers to check out."
What's actually needed: a decision about who's the legal seller of record, and whether the platform is a marketplace facilitator or a payment processor — because tax and liability rules differ sharply between the two.
"Let buyers message sellers directly."
What's actually needed: a data-retention decision. Direct messages between two parties are often the first thing subpoenaed in a dispute, and "we didn't think about how long to keep them" is not a good place to be when that happens.
"Add ratings and reviews."
What's actually needed: a moderation policy decided in advance, not improvised after the first defamation complaint.
Two categories, not one
Regulators increasingly treat two-sided platforms differently depending on how much control the platform exercises over the people fulfilling orders. The EU's Platform Work Directive, for instance, creates a presumption of an employment relationship when a platform directs and controls how gig workers perform their work — meaning a marketplace that sets rigid schedules, fixed pricing with no negotiation room, and strict dress or process codes for its sellers can find itself legally responsible for those sellers as if they were employees, with all the obligations that come with it.
None of this is a reason to avoid building a marketplace. It's a reason to decide these things once, on purpose, before the checkout flow gets built — because retrofitting a liability model after a marketplace already has real transactions running through it is a materially different, more expensive job than deciding it up front.
What "architecture first" actually means here
It doesn't mean a slower launch. It means writing down, in plain language, four things before the first checkout screen gets built:
- Who is the seller of record for tax and liability purposes
- Whether the platform's relationship with sellers looks more like a marketplace or more like an employer, under the rules of the markets it operates in
- Who owns the authoritative status of a transaction when multiple systems (payment provider, no-code database, messaging tool) all have a partial view of it
- What happens, step by step, when a payment succeeds on one side and fails to record on the other
See what your marketplace's architecture is actually promising
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