Delivery Promise
Make ambitious promises to your customers, and keep them
Increase conversions and customer satisfaction with delivery promises shoppers know they can trust.
OneStock’s Promise EngineTM powers the most reliable and compelling promises made to customers, then continuously monitors and optimizes post-purchase to ensure the promise is kept.
The leading promise engine for every type of commerce
Remove purchase uncertainty, early
Displaying accurate delivery dates on product listing and detail pages before checkout builds trust and encourages conversion. The OneStock promise is always current, calculated in real-time and based on inventory location and carrier routes and capacity.
Homewares marketplace ManoMano increased customer satisfaction by 35% by introducing 24-48 hour delivery promises.
Build and maintain trust by delivering on your promises
Monitor order execution in real-time to ensure delivery promises are kept. If delays occur, automated alerts recalculate delivery dates and notify customers proactively.
Children’s apparel brand Petit Bateau drove order cancellation to almost zero by maintaining promise accuracy from click to delivery.
Optimize delivery costs and sustainability
Balance speed, cost, margin and carbon footprint with real-time delivery decisions.
Configure carrier prioritization, route optimization, cut-off times and cost-based rules to align delivery strategy with business objectives.
Scale across all channels
Build trust with your customers wherever they shop by providing consistent and ambitious delivery promises across all your channels, including ecommerce, marketplaces, stores, social and agentic commerce.
Delivery promise can mean the difference between a lifelong customer and a bounce
Ensure your product range is given every chance to shine by offering customers the most complete and ambitious delivery options, in total confidence that you can deliver.
Delivery promise at every stage of the purchase journey
Remove purchase uncertainty well before checkout by displaying the widest range of delivery dates and options on product landing and detail pages. Your customers see keepable promises early, which builds trust and increases conversion.
Carrier management and route optimization
OneStock manages carrier selection, capacity and routing logic to ensure delivery promises are both attractive to the customer and achievable. Configure carrier calendars, pickup schedules, cut-off times and capacity constraints at a location level. OneStock automatically selects the optimal carrier based on speed, cost and business priorities while respecting operational constraints and ensuring reliable execution.
Promise monitoring and execution tracking
Delivery promise doesn’t stop at checkout. OneStock continuously monitors order execution against promised dates, tracking orchestration milestones, preparation times and carrier pickup schedules. When there’s a chance that an order will be late, your team and the customer are automatically notified and delivery dates recalculated to maintain customer trust.
Peak performance when it matters most
Maintain page-load performance even during high volume periods. The Promise EngineTM evaluates every fulfillment combination at lightning speed in order to return delivery promises in milliseconds. Performance comes from in-platform machine learning and continuously updated pre-calculations, avoiding the potential delays caused by relying only on carrier API calls.
The flexibility your customers expect
Early promise on category pages
OneStock merchants display estimated delivery dates on category and search result pages to capture attention and drive intent, even before the customer clicks. The Promise EngineTM starts with default locations for an immediate answer but then dynamically updates as it learns from customer navigation, increasing engagement and reducing the customer uncertainty that can cause a missed sale.
Express and same-day delivery
Offer 2-hour or same-day delivery wherever possible by defining eligibility zones around stores, connecting express carriers, and calculating accurate promises based on store inventory and proximity. Leading pet supplies retailer Pets at Home doubled conversion rates with 2-hour delivery promises, delighting customer when speed matters most for essential purchases.
Cross-border delivery promises
Calculate accurate delivery dates for international orders by considering customs processing, multi-leg routes (e.g. DC to hub to customer), and cross-border carrier constraints. Display import costs and delivery timelines transparently to build trust with international shoppers and reduce post-purchase surprises or cancellations.
Multi-delivery method checkout
Allow customers to mix delivery methods in a single cart, such as home delivery for certain items but pickup in-store for others, always with accurate dates and costs for each option. OneStock consolidates promises at cart level, enabling flexible fulfillment that matches customer preferences while maintaining operational efficiency and promise accuracy.
Making and keeping promises with OneStock
Configure carrier routes and business rules
Set up carrier calendars, delivery routes, capacity constraints, cut-off times and cost structures. Then define business rules for carrier prioritization, delivery speed vs. cost trade-offs, and fulfillment location preferences to align promise calculation with your strategic objectives.
Unified inventory and capacity assessment
OneStock aggregates all available inventory across warehouses, DCs stores and future stock, in real-time. This is then combined with handling capacity by location and carrier pickup capacity to determine all fulfillment options for each delivery method.
Real-time promise calculation
When a customer views a product, OneStock calculates the delivery promise options in milliseconds by evaluating thousands of permutations and selects the best options to balance your business rules with the highest chance of securing the sale.
Display promises throughout the customer journey
Fulfillment promise information is inserted into the product listing and product detail pages as well as cart and checkout so customers see all their options early and often, removing friction and building confidence throughout the shopping experience.
Track the order until the end
After the customer buys, OneStock tracks each step in the fulfillment process in real-time. If there’s a delay, for example if stock has moved or there’s a carrier issue, automated alerts notify teams and recalculate delivery dates. Proactive customer communication maintains trust even when operational challenges arise, turning potential frustration into loyalty.
What is delivery promise and why does it matter for conversion?
Delivery promise is the commitment made to customers regarding when they will receive their order, calculated in real-time based on inventory availability, carrier routes and fulfillment capacity. It matters because purchase uncertainty is the number one barrier to online conversion. When customers see accurate delivery dates early on product pages, they are more confident to buy, which reduces cart abandonment and increases conversion rates significantly.
How does OneStock calculate delivery promises in real-time?
OneStock’s Promise EngineTM evaluates thousands of fulfillment combinations in milliseconds by considering real-time inventory across all locations (warehouses, stores, future stock), handling capacity (preparation time), carrier pickup capacity, routes, calendars and cut-off times by location. The system selects optimal options based on your business rules – balancing speed, cost, margin, and sustainability – then exposes accurate promises via API or MCP server to any channel.
Can delivery promises be displayed on product listing pages?
Absolutely. OneStock can calculate and display estimated delivery dates directly on category and product listing pages before customers click through. This early transparency removes purchase friction, increases click-through rates and allows customers to make informed decisions from the very first moment they see a product. Promises update dynamically as customers navigate and refine their selections.
What happens if an order cannot meet the promised delivery date?
OneStock monitors order execution after the sale in real-time against the promised delivery dates. It tracks the process of sourcing, picking, packing and shipping the order by recording orchestration milestones. If an order risks running late, automated alerts notify your teams immediately. The system recalculates a new delivery date and can trigger proactive customer communication, maintaining trust through transparency even when operational challenges occur.
How does delivery promise integrate with carriers and shipping costs?
OneStock manages carrier selection, capacity, routes and costs within the platform using pre-configured business rules to ensure fast performance. The system calculates both customer-facing shipping fees (aligned with promotions and pricing strategies) and retailer-paid transportation costs for complete visibility. Carriers are selected automatically based on speed, cost, capacity and priority rules, ensuring promises are both attractive and profitable.
See how the world’s most powerful promise engine can transform your business
