Data sources

CarPairly uses public datasets and prices entered by hand with a source link. This page names each source, says what we take from it and under which terms. The catalog has electric cars from OpenEV Data and gas and diesel cars entered by hand from manufacturer pages, each with its source and check date. The sections below name each source.

OpenEV Data

OpenEV Data is an open dataset of battery electric vehicles, maintained on GitHub as open-ev-data. It is the source of our electric car catalog, their specifications and, where a record has one, a list price.

• Release used: the electric car catalog is built from v1.24.0, generated on 30 December 2025. We accessed it on 2 October 2026.
• Coverage of the release: 1,189 variants from 65 makes, model years 2023 to 2025. It has no 2026 models.
• What it gives us: dimensions, weights, seats, power, battery, charging and range figures, and list prices on some records. Not every record has every field. Cargo volume in particular is often missing, and when it is, we hide it.
• Where its figures come from: each record lists its own sources. Those sources include manufacturer pages, press material, regulatory filings and community contributions.
• License: CDLA-Permissive-2.0, the Community Data License Agreement, Permissive, Version 2.0. The full text is at cdla.dev/permissive-2-0.

Attribution:

Vehicle specifications and some list prices: OpenEV Data (open-ev-data), CDLA-Permissive-2.0. https://github.com/open-ev-data/open-ev-data-dataset

We load each release from a downloaded file, not through an automatic feed. We have not independently verified every figure in it.

How OpenEV prices are shown

OpenEV list prices are shown with the date the source recorded for that record. The source does not state whether a price includes tax, so we apply the market convention and say so on the price: United States and Canada prices exclude sales tax, and prices in the other markets include VAT or GST. The methodology page explains how prices are treated, including in the cost tools.

Exchange rates: European Central Bank

When CarPairly shows a price in a currency other than its own, it uses the euro foreign exchange reference rates published by the European Central Bank (ECB). We use the latest rate on or before the display date, and cross rates go through the euro. Every converted amount is marked with "≈" and the rate date, and converted amounts are never stored.

The ECB publishes its reference rates for information only and says they should not be used for transactions, so treat a converted price as an approximation. The ECB asks that it be cited as the source when its information is reproduced, and we do so here. The approximate line that shows a price in your own currency uses the same rates and is never the official price. The cost of ownership calculator does not convert between currencies. It works in the currency of the market you choose.

Gas and diesel cars

Gas and diesel cars are entered by hand from the manufacturers' pages for each market, and EPA fuel figures come from fueleconomy.gov. Each row carries its source link and check date. We do not scrape manufacturer sites.

US range and efficiency: EPA fueleconomy.gov

The US Environmental Protection Agency and Department of Energy publish fuel economy label data through the fueleconomy.gov web service. The EPA fuel figures of the US gas and diesel cars above were read from fueleconomy.gov by hand. An automatic update of US range and efficiency figures from its web service, where a record matches one of our cars, is planned; until it is live, these figures stay as read by hand.

Prices and costs we enter ourselves

Some prices and cost assumptions are entered by our team, one market at a time, and each carries a source link and a check date. We never scrape dealers, manufacturers or competitors. Cost assumptions, such as yearly distance, maintenance and depreciation, are shown in the calculator with the label "Estimate", and each assumption in use is listed with its source and check date in the tool's "Assumptions used" table. The methodology page explains the calculations.

Energy prices

Fuel and electricity prices for the cost tools come from the sources below. Each automatic source is updated by a scheduled job once it is live; until then, and for Canada and Australia, the figures are entered by hand from the named publication. Every stored price shows its period and source.

• United States, EIA. Gasoline, diesel and electricity prices from the U.S. Energy Information Administration, a public domain source. Attribution: "Source: U.S. Energy Information Administration", with the month and year of the figure.
• Germany, Netherlands and France, fuel: EU Weekly Oil Bulletin. Attribution: "Source: European Commission, Weekly Oil Bulletin", CC BY 4.0.
• Germany, Netherlands, France and Norway, electricity: Eurostat. Attribution: "Source: Eurostat, https://doi.org/10.2908/NRG_PC_204", with the access date.
• United Kingdom, fuel: DESNZ weekly road fuel prices. Contains public sector information licensed under the Open Government Licence v3.0.
• United Kingdom, electricity: DESNZ quarterly energy prices. Contains public sector information licensed under the Open Government Licence v3.0. Source: DESNZ, QEP 2.2.4.
• Norway, fuel: Statistics Norway. Attribution: "Source: Statistics Norway, table 09654", CC BY 4.0.
• Canada, fuel and electricity: Statistics Canada. Entered by hand by our team with a source link and period. Fuel prices carry the attribution "Source: Statistics Canada, Table 18-10-0001-01" and electricity prices "Source: Statistics Canada, Table 25-10-0021-01", each with the reference period. Statistics Canada publishes under the Statistics Canada Open Licence.
• Australia, electricity: Australian Energy Regulator. The Default Market Offer 2026-27 for the Ausgrid network area in New South Wales, entered by hand with a source link and period. The page and the cost tools name the region beside the price. The licence terms for this source are being confirmed.

How we treat sources

• Every displayed number has a source and a date.
• A value from an automated feed that differs by more than 30% from the stored value is held for a person to review.
• If a source cannot be fetched, we keep the previous value rather than removing it.
• Sample data is flagged as sample data and cannot run on the live site.

If a source's license changes or a figure looks wrong, we update the page and the "last reviewed" date. Read more about how we work on the about page.