Imagine you run a small 3PL — 8 clients, 30,000 units a month, two warehouse staff and yourself. You go shopping for warehouse management software. Here’s what the market actually charges you, in May 2026:
- ShipHero: $2,145/month entry tier. No per-client fee, but the base price assumes you’re an enterprise that can absorb $25K/year on software alone.
- Extensiv (formerly 3PL Central): $599/month base, plus roughly $50 per client per month. Your 8 clients add $400/mo. Total: ~$999/mo.
- ScanPower: $199/month base, plus ~$10 per client per month. Your 8 clients add $80. Total: ~$279/mo. Cheapest, but missing core WMS features.
Notice the pattern. Every option either prices for enterprise (ShipHero) or actively penalizes growth (Extensiv, ScanPower). The thing every small 3PL is trying to do — add more clients — makes the software bill rise faster than the revenue.
Why per-client pricing is a trap
Per-client pricing makes intuitive sense to the vendor: more clients = more value, charge more. But it ignores what the software is actually doing. The marginal cost of adding one more client to a multi-tenant WMS is zero. The vendor’s database is already running. The infrastructure is already paid for. They charge per client because the market lets them, not because it costs them anything.
Worse, per-client pricing creates a perverse incentive for the operator. You start wondering whether that 9th client is worth $50/month in extra software cost. You might pass on a customer that would have made you $2,000/month in fulfillment revenue, because the software vendor took a $50 cut. That’s an enormous distortion of small-business economics.
What software should actually cost
Multi-tenant WMS infrastructure costs the vendor maybe $0.05 per active client per month at any reasonable scale. The development cost is amortized across the whole customer base. Everything past base infrastructure is operating margin.
So what should you actually pay? Looking at the cost structure honestly: a fair price for a small 3PL is in the range of $59 to $349 per month flat — with that range reflecting your warehouse count, your support tier, and your processing volume. Per-client surcharges shouldn’t be in the equation.
How we priced iShipTo
When we built iShipTo, we deliberately mirrored that fair-cost structure. Starter at $59/mo (1 warehouse, up to 3 clients, 5K units). Growth at $179/mo (up to 10 clients, 25K units). Pro at $349/mo (multi-warehouse on Phase 2, unlimited clients, 100K units). New operators can try the full product for $1.99 across 3 months before committing. No per-client fees. No per-seat fees. No per-channel fees.
The reason this works for us is that we don’t need to price you out of growth. We’re a 3PL ourselves. We know what your cost structure looks like. Our software business has the same incentives as our fulfillment business: we want SMB warehouses to thrive, not to optimize their software spend.
If you’re evaluating WMS options right now
Build a one-page model of your software cost over the next 24 months. Project your client count. Multiply the per-client fee. Add the base. Compare to a flat-price option — even if the flat price looks higher on day one, it almost always wins by month 18 because your client count grew faster than your warehouse count.
If you want a free trial that doesn’t require a sales call, sign up at iShipTo.us — we seed a demo workspace with 50 products and 5 historical POs in under 5 minutes.