SwiftFill: the cheapest API that knows addresses

An address entered in an online form is not just a piece of information that a customer fills in once. An online shop needs it to deliver an order; an internet service provider uses it to check connection availability; a delivery service uses it to determine the delivery location; and a booking system uses it to verify the location where the service is to be provided. If the address is incorrect, incomplete or non-existent, problems will arise with delivery, invoicing or customer support.

SwiftFill – API for points of interest
Fig. 1: SwiftFill helps with verifying addresses and providing suggestions, but also, for example, with calculating the distance between two coordinates.

Why SwiftFill rather than Google Maps or SmartForm?

We needed to work with addresses for our own projects as well as for our clients, and we found that the solutions available from Google Maps and SmartForm were unnecessarily expensive for many use cases. That is why we created our own address API, which solves the same problem more efficiently and at up to 30 per cent lower cost.

If you currently pay Google Maps or SmartForm to manage your addresses, SwiftFill is worth considering. And the greater the volume of queries your system processes, the greater the difference in costs.

50 million address points. Result in 150 ms.

SwiftFill is an API for working with address data. It can find a matching result from 50 million address points in approximately 150 ms. When an address is entered, it offers suitable options, verifies the accuracy of the data entered, retrieves information for a specific address, or finds the nearest address based on the coordinates provided. The API can be integrated with an online shop, website, internal application or backend, allowing address data to be utilised directly within the logic of your own system.

As soon as the customer starts typing an address, SwiftFill immediately suggests matching addresses. This means that typos, incomplete entries or incorrectly entered numbers do not end up in the company’s database. The selected address is also verified, so the application knows exactly which details it is working with.

Address autocomplete
Fig. 2: SwiftFill reads data from more than 50 million address points.

For an online shop, this means fewer errors in delivery details and fewer instances where customer support has to deal with undelivered orders or contact customers to correct their addresses. When it comes to registration and contact forms, SwiftFill helps ensure that input data is accurate right from the moment it is entered.

The application can use the address data directly within its logic – for example, to check whether the company provides a service at a given address, or to calculate the distance between two locations. An internet service provider can thus use the address to check connection availability, a delivery service can determine whether it delivers to that location, and a service company can calculate the distance to the customer.

SwiftFill is not just an auto-complete tool

Your application sends a query and SwiftFill returns a result that the system can process immediately. Verifying an address, retrieving details for a specific address or finding the nearest address based on coordinates – individual functions can be integrated directly into your own application. SwiftFill can therefore run in the background on the backend and automatically verify or process addresses as part of the application’s logic.

Integration – what can you connect SwiftFill to?

Environment / systemUsing SwiftFill
Online shopAutocomplete and verification of delivery addresses directly within the order
WordPressIntegration into forms and other parts of the website
Custom web applicationDirect connection via API and the use of address data within custom logic
In-house applicationsVerification and processing of addresses directly within internal processes
Booking systemAddress verification and dealing with the place where the service is provided
BackendAutomatic address verification and processing without user intervention
Specialised business systemIntegration tailored to the specific architecture and needs of the company
Table 1: Examples of how to use SwiftFill

SwiftFill is not dependent on any specific platform or plug-in. You can connect it via an API to the system you are already using and integrate the address data directly into that system’s own logic. For non-standard systems, we will develop a bespoke integration. You do not need to change your current system just to work with addresses.

You only pay for what you actually use

The cost of SwiftFill depends on the actual use of the service. We set the price on a case-by-case basis according to the customer’s needs and the volume of requests, so as to help them reduce the costs associated with working with address data. Our aim is for SwiftFill to be more cost-effective than existing solutions from Google Maps or SmartForm. If you’re paying too much for an address API, we’ll compare your current costs and prepare a quote with a lowest-price guarantee.

Volumeaverage price of SwiftFillaverage price on Google Mapsaverage price of SmartForm
10,000 enquiries1,200 CZK3,700 CZK2,500 CZK
100,000 enquiries4,400 CZK35,000 CZK9,500 CZK
1,000,000 queries18,500 CZK230,000 CZK40,000 CZK
Table 2: Comparison of prices for competing tools and SwiftFill. The price quoted is the average across all types of enquiries and is based on official, publicly available price lists as at 1 October 2026.

Reference: Stěhuju.cz – the aim is to achieve a 30 per cent saving compared with Google’s solution

Stěhuju.cz uses location and navigation services to manage collection and delivery points and to plan removals. When transitioning from the Google solution, we implemented SwiftFill as a more cost-effective alternative and integrated it into the existing Stěhuju.cz system. According to statistics from operations to date, the client saves approximately 30 per cent on address API costs by using SwiftFill.

SwiftFill and Stěhuju.cz
Fig. 3: We have successfully implemented SwiftFill for our client Stěhuju.cz, where we are aiming for savings of up to 30 per cent by replacing the Google solution. (source: Stěhuju.cz)

Do you use Google Maps or SmartForm? We’ll compare your current volume of enquiries with SwiftFill and show you the exact difference in costs.

Do you want to use SwiftFill?

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