Best Online Encyclopedias in 2026
29 online encyclopedias ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
29ranked
17free plans on this page
$20.83/molowest paid tier
3 Oct 2026last checked
| # | App | Score | From | Free plan | Paid from | Citation tools | Educator resources | Institutional access | Content formats | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Wikipedia | 9.7 | Free | Yes | — | Yes | Yes | Yes | text and images | View |
| 2 | Store norske leksikon | 9.3 | Free | Yes | — | Yes | — | — | text and images | View |
| 3 | World Book Online | 8.8 | $20.83/mo | No | — | Yes | Yes | Yes | multimedia and interactive | View |
| 4 |  Treccani | 8.2 | Free | Yes | — | — | Yes | — | text | View |
| 5 | Infoplease | 7.8 | Free | Yes | — | Yes | Yes | — | multimedia and interactive | View |
| 6 |  Britannica Library | 7.3 | — | No | — | Yes | Yes | Yes | multimedia and interactive | View |
| 7 |  Encyclopaedia Britannica | 7.0 | — | — | — | Yes | Yes | Yes | multimedia and interactive | View |
| 8 | Enciclopèdia.cat | 7.0 | Free | Yes | — | Yes | Yes | — | text and images | View |
| 9 |  The Canadian Encyclopedia | 6.9 | Free | Yes | — | Yes | Yes | — | multimedia and interactive | View |
| 10 | Te Ara – The Encyclopedia of New Zealand | 6.8 | Free | Yes | — | Yes | Yes | — | multimedia | View |
| 11 | Brockhaus | 6.7 | — | No | — | Yes | Yes | Yes | multimedia | View |
| 12 | Credo Reference | 6.7 | — | — | — | Yes | Yes | Yes | multimedia and interactive | View |
| 13 |  Encyclopedia.com | 6.7 | Free | Yes | — | Yes | — | — | multimedia | View |
| 14 | Encyclopedia of Korean Culture | 6.6 | Free | Yes | — | Yes | — | — | text and images | View |
| 15 | Lex – Danmarks Nationalleksikon | 6.5 | Free | Yes | — | Yes | — | — | multimedia and interactive | View |
| 16 | Encyclopaedia Universalis | 6.4 | — | No | — | Yes | Yes | Yes | multimedia and interactive | View |
| 17 | Nationalencyklopedin | 6.4 | — | No | — | Yes | Yes | Yes | multimedia | View |
| 18 | Encyclopédie Larousse | 6.3 | Free | Yes | — | — | — | — | text and images | View |
| 19 | Baidu Baike | 6.3 | Free | Yes | — | Yes | — | — | text and images | View |
| 20 | Oxford Reference | 6.1 | — | No | — | — | — | Yes | text and images | View |
| 21 | New World Encyclopedia | 6.1 | Free | Yes | — | Yes | — | — | text and images | View |
| 22 |  Klexikon | 6.0 | Free | Yes | — | Yes | Yes | — | multimedia | View |
| 23 |  Vikidia | 5.9 | Free | Yes | — | Yes | — | — | multimedia | View |
| 24 |  Encyclopedia of Arkansas | 5.9 | Free | Yes | — | Yes | Yes | — | multimedia | View |
| 25 | Encyclopedia of Alabama | 5.7 | Free | Yes | — | Yes | Yes | — | multimedia | View |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which online encyclopedia is ranked first on Samsung Mobile US Press?
Wikipedia is ranked #1 of 29 with a score of 9.7. Store norske leksikon is second and World Book Online third.
How many of these have a free plan?
17 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, World Book Online has the lowest first paid tier we found: $20.83/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.