Probuilds.netvsU.GG

Both answer the question "what do I build on this champion", but from different source data. Probuilds.net aggregates the recent matches of hundreds of manually-tracked pros and indexes their builds by champion: you see what a specific player chose in a real match. U.GG computes the optimal current-patch build over millions of aggregated games and presents it with runes, counters, and tier lists in a clean view. Most players use U.GG as a daily reference and open Probuilds.net for specific cases.

Data source

• Probuilds.net: individual pro builds from recent real matches (items in order, runes, summoner spells, KDA, duration). It doesn't average: each entry is a concrete match by a concrete player. The source is Riot's API, and each new tracked-pro match appears within hours.
• U.GG: an aggregated build computed over millions of games, filterable by rank (Platinum+, Diamond+, Master+), role, and patch. It doesn't tell you what Faker did; it tells you what works statistically at your rank.

The distinction matters because of Probuilds.net's central editorial caveat: what works in Challenger doesn't necessarily scale to your elo, since pros play with coordination and mechanics 99% of the player base lacks. U.GG avoids that bias by filtering to your own rank.

Scope and depth

Probuilds.net does one thing and does it completely: pro builds by champion, with filters by role, league, and player. It has no counters, tier lists, or analysis of the "why" behind each choice.

U.GG is broader. Beyond builds it includes OP.GG-style match history, per-matchup counters, tier lists by role and rank, statistics, and its own Probuilds section — though its pro base is smaller than a dedicated site like Probuilds.net. It also offers an optional desktop app that imports runes directly into the client during champ select.

Neither one explains the statistical reasoning in depth; for that both point to Lolalytics.

Languages, UX, and monetization

• Probuilds.net: English only. Legacy UX (dense, no animations, poor mobile) that feels 2014-vintage. 100% free, no paid tier, sustained by heavy ads.
• U.GG: multilingual (English, Spanish, Korean, French, German, Portuguese). Modern, clean UX, its historical differentiator against legacy sites. Free at the core, with a Premium tier (~$3/month) that removes ads and unlocks filters; the site pushes the subscription with popups, but the free version covers nearly everything.

Which one?

• Optimize your build for your rank → U.GG. Filter by rank and role; Probuilds.net only shows the top 0.01%.
• Get ahead of the meta in a patch's first days → Probuilds.net. Pros experiment before U.GG's aggregated data accumulates sample.
• Check runes, counters, and tier list before ranked → U.GG. All in one place; Probuilds.net does no counters or tier lists.
• Study a specific pro or copy their style → Probuilds.net. Filter by name and see their pick rotation and builds.
• Compare how different leagues build (LCK vs LEC vs LPL) → Probuilds.net, which indexes by league and region.
• You want Spanish and a decent mobile experience → U.GG, for its languages and modern UX.

They're complementary: U.GG as the daily reference for what to build at your rank, Probuilds.net as a window into the competitive meta when a patch just shipped or when you want to see what a pro did in a concrete match.