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Independent tests of 3D-printing materials, with the raw data
We measure strength, heat resistance and real cost of filaments under documented conditions, publish every dataset, and show exactly how each number was produced.
Lab tests
Tensile, impact and heat tests with at least five specimens per condition, confidence intervals and stated limitations.
Comparisons
Prices and specifications normalised so they can be compared, each with a source and the date it was checked.
Open data
Every dataset as CSV under CC BY 4.0, archived with a DOI where possible. Reuse it, check it, cite it.
Latest results
- PLA filament price per kilogram: 5 brands compared (October 2026)Five PLA spools normalised to price per kg on 2026-10-15: from $19.99/kg to $24.90/kg, with source and date for every number.
- How to benchmark a VPS in 15 minutes (and what three budget plans scored)A repeatable sysbench + fio routine and sample results for three 2 vCPU / 4 GB plans.
- How long do classifieds listings stay online? An analysis of 94,227 listings30 days of public listing data: electronics sell fastest, services slowest, and photos matter (sample analysis).
- PLA vs PETG vs ABS: tensile strength of 3D-printed specimensFive ISO 527 specimens per material, printed flat: PLA 51.6 MPa, PETG 47.9 MPa, ABS 40.0 MPa, with raw data and limitations.
Why you can trust these numbers
- We buy samples at retail; manufacturers cannot pay for coverage.
- Methods, settings and limitations are published with every test.
- Every number is calculated from the published data, never typed from memory.
- Mistakes are corrected openly and logged in each article’s changelog.
Read more about us, our methodology and our corrections policy.