Stop losing money on oversized boxes, broken fragile orders, and spoiled perishables. You already know ShipStation - keep it. String makes sure every order ships right, automatically, without your team touching anything new.
Trusted by ShipStation brands
Every shipping operation eventually has a handful of rules that are just... specific to them. Maybe it's temperature-sensitive inventory. Maybe it's a fragile SKU that can't survive standard packing. Maybe it's a batching process that only makes sense because of how your warehouse is laid out.
None of that is a flaw in whatever platform you're using - it's just what happens once a business gets specific enough. No off-the-shelf tool, ShipStation or otherwise, is built to know your exact rules. That's not really their job.
The usual response is ripping out your whole stack for a full enterprise warehouse system, just to get those few specific rules handled: tens of thousands of dollars and months of retraining your team, to solve something that's really just a handful of rules away from fixed. You don't need to replace your stack.
You need those specific rules built into it.
String fills the gaps - saving you time and money on every order that slips through
String sits above ShipStation, not in between it. Orders land in your account exactly like they do today - nothing gets rerouted, nothing passes through us first. String reads each order, applies your rules, and updates the shipment automatically, before your warehouse ever sees it.
Your team keeps using the ShipStation screen they already know. We handle everything behind it.
Think of String less like new software, and more like an extremely fast member of your fulfillment team — one who happens to work entirely inside ShipStation.
No code, no keys for your team to manage, no new dashboard to log into.
Tell us what's costing you money or causing problems today. We build the rules — whatever they need to be — and maintain them as your products, carriers, or packaging change.
Orders land in ShipStation as normal. By the time your team sees them, String has already made the decisions — box, rate, carrier, batch — so nobody has to.
String is like hiring a cool robot that figures out the best package and cheapest shipping service for each order — it's especially handy when you're dealing with new shipping services or rate changes, and does a great job of making our team more efficient AND more accurate.
https://ketochow.xyz
Most of our customers tell us the same thing: it's not just that they don't have to manage another piece of software — it's that when something needs
to change, there's a real person who picks up, understands their operation, and builds it. No support ticket queue, no waiting on someone else's
roadmap.
Think Software as a Service, but with an agency feel.
Giordano's needed to update its ecommerce stack, specifically with a migration from a legacy ecommerce platform to Shopify. We have a complex business: multiple ecommerce channels (Shopify and third-party sites), a mix of in-house and 3PL fulfillment, and unique shipping rules since we ship a frozen product. This was a daunting project at the start, but String truly provided a customized solution that met every requirement. I was continually impressed by what I thought would be a difficult ask was no big deal for Paul and the String team to implement, which not only helped us launch, but gives me confidence that String will be a long-term strategic vendor partner as we scale our business.
https:giordanos.com
Because String can pull in outside data — weather, order value, your carrier contracts — and check it all at once, we can build the specific rules a horizontal platform isn't set up to handle. Here's a few examples of what we've built for other brands .
Carrier flat-rate programs only pay off if you pack into their specific box — which means packing and rate selection can't be decided one after the other, they have to be checked together. String prices an order against your standard rates and every flat-rate option at once, and automatically picks whichever comes out cheaper. Systems that treat packing and rating as separate steps tend to miss the cases where switching boxes would have saved money.
String checks the forecasted temperature at the delivery address before it ships. If it's too hot or cold, we switch to an insulated box, add the right amount of ice packs or dry ice, and adjust the shipping speed — automatically, based on your thresholds.
If an order's worth protecting — high dollar value, glass, electronics, anything fragile — String automatically packs it sturdier and routes it through carriers that handle delicate freight well.
When an order doesn't fit in one box, String figures out the most cost-effective way to split it across multiple boxes, based on your packaging and your carriers' rates.
Most warehouses batch by more than one rule at once — zone, cutoff time, priority, carrier. String builds that logic around how your warehouse actually runs, so batches are ready without someone piecing it together by hand.
If stock can't fully cover an order, String checks it against your inventory using FIFO logic and puts it on hold automatically — instead of letting it ship out of sequence or against a stockout.
These are examples of what we've built, not the full list. If your shipping has a specific quirk, tell us about it — we'll tell you what it'd take to build.
Working with String has been a game-changer for our e-commerce fulfillment operations. We used to spend a significant amount of time manually creating ShipStation batches, grouping orders by product, and selecting carriers. All of that slowed our team down and introduced unnecessary complexity. String came in and built custom automation and logic that now reviews shipping rates and automatically chooses the most cost-effective carrier while still meeting our delivery expectations. They also implemented auto-batching, so each morning our orders are already organized by product and ship date, which makes printing and processing incredibly streamlined. Their support has been fast, thoughtful, and reliable, and Paul has been especially awesome to partner with.
https://gainsinbulk.com
ShipStation's built-in tools handle standard box selection and rate shopping well — that's exactly what a horizontal platform should be great at. String exists for the rules that are specific to your business: the temperature check, the fragility threshold, the batching logic that only makes sense for your warehouse. We build those and keep adjusting them as your business changes, without you adding another piece of software or another vendor to manage.
Our company has been using ShipStation for several years, but when we recently added String, we discovered a whole new level of servicing online orders. The folks at String could not have been more supportive and helpful. Now, our orders flow in with the best shipping service designated at the best price. Also, the savings we are experiencing only add to the many advantages of using String with ShipStation. These two platforms are a 'perfect duo!
VP, Claxton Bakery, Inc.
We don't charge based on how much you ship, and we never penalize you for growing. Pick the tier that matches how much is currently slipping through the cracks.
$2000 $ 1500 /month when billed annually
We handle your box selection, rate shopping, and batching end-to-end — built around how your warehouse actually runs, without your team touching new software.
$3500 $ 2625 /month when billed annually
We handle the rules around temperature, fragility, and timing — the specific stuff most brands end up needing custom logic for.
Custom Quote
For brands with a genuinely complex fulfillment setup.
When we first set out to connect our BigCommerce store to ShipStation and then into Extensiv CartRover / Warehouse Manager, we quickly realized there wasn't an existing interface that could handle that workflow. That's where String stepped in. They didn't just offer a workaround, they built a custom-coded solution from the ground up that is now effectively a turnkey integration. It handles everything — shipping data, multi-package logic, and real-time order synchronization — in a way that feels completely natural and built-in. Their team's technical expertise, responsiveness, and creative problem-solving have set a new standard for what e-commerce integration should look like.
Deiman Great Lakes LLC / Deiman International
You already know ShipStation - keep it. String makes sure every order ships right, automatically, without your team touching anything new.
