Businesses reach for ecommerce consulting at three quite different moments: choosing or replacing a platform, fixing a store that converts badly, and trying to grow a store whose acquisition costs have risen. Those need different people. A consultancy that is strong on replatforming may know little about paid acquisition economics, and a growth specialist is the wrong adviser for a migration. Deciding which problem you actually have is most of the purchasing decision.
Replatforming advice should start with what is wrong now
The question is rarely which platform is best; it is which constraints are actually costing you money and whether they can be resolved without a migration. Ask the consultancy to write down the specific limitations it is solving for, with an estimate of what each costs you today. A migration is expensive, disruptive and risks search visibility, so it deserves an argument rather than a preference.
Watch for platform partnerships and what they pay
Many consultancies are certified partners of the platforms they recommend and receive referral fees or preferential terms. That does not make the advice wrong, but you should know about it. Ask directly which partnerships they hold and whether any payment follows from your choice; a firm that answers plainly is easier to trust on everything else.
The unglamorous operational work usually pays best
Product data quality, stock accuracy, delivery promises that hold, returns handling and customer service response times move revenue and retention more reliably than a redesign. They also cost less. A consultant who spends the first week in your warehouse and your support inbox rather than in your analytics is often the one who will find the money.
Separate the advice from the build
If the same firm advises on the platform and is paid to build on it, the recommendation is not independent. Either buy the advice from someone who does not implement, or accept a combined engagement knowingly and get a second opinion on the platform choice. The cost of an independent second read is trivial against the cost of the wrong migration.
Questions people ask about ecommerce consulting agency
Consulting or an agency retainer?
Consulting suits a defined question with a decision at the end. A retainer suits continuous work such as merchandising, campaigns and optimisation. Buying a retainer to answer a strategic question tends to produce a long engagement and a postponed decision.
What should an ecommerce audit cover?
Commercial performance by product and channel, conversion by step and device, technical health and speed, search visibility, the product data feeding every channel, and the operational promises that affect repeat purchase. An audit that stops at the website has looked at part of the machine.
How much does it cost?
Day rates vary widely and the more useful comparison is scope: how many days, spent on what, producing what. Ask for a fixed-price diagnostic with a defined deliverable before any longer engagement, so the first purchase is small and tells you how they think.
Will a consultant help with marketplaces?
Some specialize in them, and selling through a marketplace is a genuinely different business with its own fee structures, content rules and competitive dynamics. If marketplaces matter to you, ask for named accounts they have run there rather than a general claim of experience.