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Rank #6 of 8 in Game Engines

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three.js

Open Source

three.js contributors (mrdoob)

115.6k7k/yrnpm 12.2M/wk

Try itExperimental

See what an agent can do with three.js before you ever sign up. Pick a story: recorded sessions replay real probe-harness transcripts; sandboxed self-drive sessions are designed and gated (docs/TRY-IT.md).

$curl -s https://threejs.org/docs/llms.txt | grep -m1 Instructionsrecorded session — replayed, not live
recorded 2026-09-15 · exit 0 · captured verbatim by our probe harness, secrets redacted

Verified integrations

No integration evidence found in our corpus for this product yet — that means none was found, never that it doesn’t integrate.

By theme — the product's score on each story themeBy theme

Agenticness — how well agents can access and operate the productAgenticnessevidence →

How well agents can access and operate the product

18.8/100

Ai workflows — AI in the engine loop — agent-driven editors, copilots, codegen-friendly APIs, runtime inferenceAi workflowsevidence →

AI in the engine loop — agent-driven editors, copilots, codegen-friendly APIs, runtime inference

20.6/100

Asset pipeline — getting content in — automated import, formats, marketplacesAsset pipelineevidence →

Getting content in — automated import, formats, marketplaces

8.0/100

Automation depth — how much of the product can run unattendedAutomation depthevidence →

How much of the product can run unattended

0.0/100

Core engine — the engine core — rendering, 2D, physics, performance at scaleCore engineevidence →

The engine core — rendering, 2D, physics, performance at scale

8.0/100

Editor tooling — the editor as a product — scene tools, extensibility, team workflowsEditor toolingevidence →

The editor as a product — scene tools, extensibility, team workflows

6.7/100

Headless automation — the engine without a human — CLI builds, CI test runs, dedicated serversHeadless automationevidence →

The engine without a human — CLI builds, CI test runs, dedicated servers

0.0/100

Licensing openness — the terms you build on — licenses, royalties, source access, pricing stabilityLicensing opennessevidence →

The terms you build on — licenses, royalties, source access, pricing stability

63.7/100

Openness — open source, data portability, and self-hosting storiesOpennessevidence →

Open source, data portability, and self-hosting stories

45.0/100

Platform export — shipping everywhere — desktop, mobile, console, browser payloadsPlatform exportevidence →

Shipping everywhere — desktop, mobile, console, browser payloads

48.6/100

Privacy posture — data-handling and privacy storiesPrivacy postureevidence →

Data-handling and privacy stories

n/a

Scripting — writing the game — languages, visual scripting, iteration speedScriptingevidence →

Writing the game — languages, visual scripting, iteration speed

30.0/100

Story verdicts — every judged story with its evidenceStory verdicts

?

Sorted by importance (agentic first) (high → low) · 56/56 stories · click a row’s chevron for the rationale and evidence

Drive the product through a documented public API G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3partial6/10T

Plug MCP servers into this product so it can use their tools G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3n/a0/10

Connect an agent via an official MCP server G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3noneuntestednone yet

Delegate tasks to a built-in AI assistant inside the product G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness3noneuntestednone yet

Point an agent at llms.txt or agent-oriented docs G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2full9/10T

Explore an interactive API reference with runnable examples G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial6/10T

Build against official SDKs G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial5/10T

Download a machine-readable API spec (OpenAPI or equivalent) G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial5/10T

Rely on versioned APIs with a documented deprecation policy G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial4/10T

Operate the product with natural-language commands G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial3/10T

Get AI-generated insights and suggestions from my data inside the product G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Issue scoped/least-privilege API credentials for an agent G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2n/auntestednone yet

Run the product headlessly / in CI for automation G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Set up automations that run autonomously in the background G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Subscribe to events via webhooks G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2n/auntestednone yet

Use an official CLI G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Test against a sandbox environment without touching production data G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness1noneuntestednone yet

Self-host the core product G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness3full9/10T

The license is permissive with no royalties or per-install fees — I keep what my game earns

License

studio leadLicensing openness — the terms you build on — licenses, royalties, source access, pricing stabilityLicensing openness3full9/10T

The primary scripting language is productive and fully exposes the engine API, with a debugger behind it

Language

game developerScripting — writing the game — languages, visual scripting, iteration speedScripting3full7/10X

An agent can drive the editor and project programmatically — create scenes and nodes, edit properties, trigger builds — through a documented scriptable interface

Agent editor

ai-native userAi workflows — AI in the engine loop — agent-driven editors, copilots, codegen-friendly APIs, runtime inferenceAi workflows3partial4/10T

The engine ships a modern production 3D renderer — PBR materials, global illumination or baked lighting, shadows, post-processing

Rendering

game developerCore engine — the engine core — rendering, 2D, physics, performance at scaleCore engine3partial4/10X

A full visual editor — viewport, inspector, prefabs/scene composition — is the primary way to build levels

Editor

technical artistEditor tooling — the editor as a product — scene tools, extensibility, team workflowsEditor tooling3partial3/10C

Build and export the project from the command line, headless, in CI — no human clicking an editor

Ci

game developerHeadless automation — the engine without a human — CLI builds, CI test runs, dedicated serversHeadless automation3none0/10

Extend and automate the editor itself — custom tools, editor scripts, plugins that manipulate scenes and assets programmatically

Extensibility

game developerEditor tooling — the editor as a product — scene tools, extensibility, team workflowsEditor tooling3none0/10

One project exports to desktop, mobile, and (directly or via partners) consoles

Targets

studio leadPlatform export — shipping everywhere — desktop, mobile, console, browser payloadsPlatform export3none0/10

Define rules that trigger actions automatically on events G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth3noneuntestednone yet

Export all of my data in open formats and leave G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness3noneuntestednone yet

Prevent my data from being used to train AI models G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture3n/auntestednone yet

Read and modify the full engine source when I hit a wall

Source

game developerLicensing openness — the terms you build on — licenses, royalties, source access, pricing stabilityLicensing openness2full9/10T

Read the product's source under an open license G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness2full9/10T

The engine installs from a package registry into my existing toolchain — a library I import, bundle, and tree-shake like any dependency

Web

web developerPlatform export — shipping everywhere — desktop, mobile, console, browser payloadsPlatform export2full9/10T

My game runs in the browser with a reasonable payload — WebGL today, and a credible WebGPU story

Web

web developerPlatform export — shipping everywhere — desktop, mobile, console, browser payloadsPlatform export2full8/10T

LLM-generated code mostly works on the first try — stable, well-documented APIs with abundant public examples the models have seen

Codegen

ai-native userAi workflows — AI in the engine loop — agent-driven editors, copilots, codegen-friendly APIs, runtime inferenceAi workflows2partial6/10T

The pricing and license terms have a track record of stability — no retroactive changes that reprice games already shipped

Trust

studio leadLicensing openness — the terms you build on — licenses, royalties, source access, pricing stabilityLicensing openness2partial5/10T

Standard interchange formats — glTF, FBX, USD — import cleanly

Formats

technical artistAsset pipeline — getting content in — automated import, formats, marketplacesAsset pipeline2partial4/10X

2D is a first-class workflow — sprites, tilemaps, 2D physics — not a 3D afterthought

2d

game developerCore engine — the engine core — rendering, 2D, physics, performance at scaleCore engine2none0/10

A large asset store or package ecosystem gives me ready-made models, tools, and plugins

Marketplace

game developerAsset pipeline — getting content in — automated import, formats, marketplacesAsset pipeline2none0/10

An official AI assistant inside the engine helps with engine tasks — generating scripts, answering API questions, scaffolding scenes or assets

Copilot

ai-native userAi workflows — AI in the engine loop — agent-driven editors, copilots, codegen-friendly APIs, runtime inferenceAi workflows2none0/10

Asset import is automatable — import hooks, presets, and pipeline scripts process incoming assets without hand-clicking each one

Import

technical artistAsset pipeline — getting content in — automated import, formats, marketplacesAsset pipeline2none0/10

Game logic runs headless on servers — a dedicated-server or server-runtime build without rendering

Server

game developerHeadless automation — the engine without a human — CLI builds, CI test runs, dedicated serversHeadless automation2none0/10

Profile and scale — a real profiler, plus data-oriented paths (ECS, jobs, instancing) when scenes get heavy

Performance

game developerCore engine — the engine core — rendering, 2D, physics, performance at scaleCore engine2none0/10

The project format and tooling play well with version control and multi-person teams — mergeable scenes, diffable text formats, or built-in collaboration

Collaboration

studio leadEditor tooling — the editor as a product — scene tools, extensibility, team workflowsEditor tooling2none0/10

Build gameplay logic with visual scripting without writing code

Visual

technical artistScripting — writing the game — languages, visual scripting, iteration speedScripting2noneuntestednone yet

Built-in physics — rigid bodies, collisions, raycasts — works out of the box

Physics

game developerCore engine — the engine core — rendering, 2D, physics, performance at scaleCore engine2noneuntestednone yet

Choose where my data is stored (region/residency) G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2n/auntestednone yet

Control data retention and deletion G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2n/auntestednone yet

Do everything through the API that I can do in the UI G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness2noneuntestednone yet

Opt out of telemetry and usage tracking G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2n/auntestednone yet

Perform bulk operations across many items at once G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth2noneuntestednone yet

Schedule recurring jobs or workflows G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth2n/auntestednone yet

Tests run headlessly — unit and integration tests of game code execute in CI against the real engine

Testing

game developerHeadless automation — the engine without a human — CLI builds, CI test runs, dedicated serversHeadless automation2noneuntestednone yet

The edit-run loop is fast — hot reload or near-instant preview after a script change

Iteration

game developerScripting — writing the game — languages, visual scripting, iteration speedScripting2noneuntestednone yet

Run ML models inside the game — an official inference runtime for on-device model execution

Inference

game developerAi workflows — AI in the engine loop — agent-driven editors, copilots, codegen-friendly APIs, runtime inferenceAi workflows1n/auntestednone yet

The project's governance and funding are transparent — a foundation, published finances, or a public roadmap I can plan against

Governance

studio leadLicensing openness — the terms you build on — licenses, royalties, source access, pricing stabilityLicensing openness1noneuntestednone yet

Version, review, and roll back my automations G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth1noneuntestednone yet

Opportunities — the stories that would move this product's scores, from its own judged verdictsOpportunitiestop 8 of 39 stories with headroom

What would move three.js’s scores — derived from its own judged verdicts, biggest headroom first. Each line quotes what the judge found missing; shipping it (or evidencing it publicly) is the fix.

  1. Agenticness — how well agents can access and operate the productDelegate tasks to a built-in AI assistant inside the product

    nonemoves Built-in AIimpact 45

    The axis applies to this product kind (peer products hold positive or none verdicts on this story), so lack of evidence for an applicable capability is "none", never "na".

  2. Agenticness — how well agents can access and operate the productConnect an agent via an official MCP server

    nonemoves agent-readyimpact 45

    The axis applies to this product kind (peer products hold positive or none verdicts on this story), so lack of evidence for an applicable capability is "none", never "na".

  3. Automation depth — how much of the product can run unattendedDefine rules that trigger actions automatically on events

    nonemoves PA Scoreimpact 30

    The axis applies to this product kind (peer products hold positive or none verdicts on this story), so lack of evidence for an applicable capability is "none", never "na".

  4. Editor tooling — the editor as a product — scene tools, extensibility, team workflowsExtend and automate the editor itself — custom tools, editor scripts, plugins that manipulate scenes and assets programmatically

    nonemoves PA Scoreimpact 30

    Evidence confirms three.js ships an editor (threejs.org/editor) and a devtools browser extension, but nothing in the pack describes any plugin API, scripting console, or extension mechanism for programmatically automating the editor itself — the docs excerpts focus on the library API (TSL, renderers, loaders, controls), not editor extensibility.

  5. Headless automation — the engine without a human — CLI builds, CI test runs, dedicated serversBuild and export the project from the command line, headless, in CI — no human clicking an editor

    nonemoves PA Scoreimpact 30

    Missing: any documented headless rendering approach (e.g. headless-gl/Node canvas), a CLI build/export command, and CI pipeline examples.

  6. Platform export — shipping everywhere — desktop, mobile, console, browser payloadsOne project exports to desktop, mobile, and (directly or via partners) consoles

    nonemoves PA Scoreimpact 30

    The evidence pack shows three.js is a browser-based WebGL/WebGPU rendering library with no documentation of a build/export pipeline to native desktop, mobile, or console targets — no mention of Electron/Cordova wrapping, console SDK partnerships, or platform-specific packaging tools.

  7. Openness — open source, data portability, and self-hosting storiesExport all of my data in open formats and leave

    nonemoves PA Scoreimpact 30

    The axis applies to this product kind (peer products hold positive or none verdicts on this story), so lack of evidence for an applicable capability is "none", never "na".

  8. Agenticness — how well agents can access and operate the productGet AI-generated insights and suggestions from my data inside the product

    nonemoves Built-in AIimpact 30

    The axis applies to this product kind (peer products hold positive or none verdicts on this story), so lack of evidence for an applicable capability is "none", never "na".

Showing the top 8 of 39 — every none/partial verdict in the story verdicts table is headroom.

Think a verdict is wrong? Every verdicts-table row has a Flag link — see the methodology.

Coverage map — which docs area, API section, or community source covers which judged storiesCoverage map9 surfaces · 20 covered stories

Where the cited evidence behind each covered verdict came from — the same citations the verdicts table shows, no extra judging.

Probe proofs — replayable recordings from the probe harnessProbe proofs

Replayable recordings from our probe harness — see the Prove-It protocol to submit one.

$curl -s https://threejs.org/docs/llms.txt | grep -m1 Instructionsreproduced
$ curl -s https://threejs.org/docs/llms.txt | grep -m1 Instructions
## Instructions for Large Language Models
$npm view three versionreproduced
$ npm view three version
\|0.186.0
|
$curl -s https://api.npmjs.org/downloads/point/last-week/threereproduced
$ curl -s https://api.npmjs.org/downloads/point/last-week/three
{"downloads":12206532,"start":"2026-09-05","end":"2026-09-11","package":"three"}
$curl -s https://threejs.org/llms.txt | head -6reproduced
$ curl -s https://threejs.org/llms.txt | head -6
# Three.js

> Three.js is a cross-browser JavaScript library for creating 3D graphics using WebGL and WebGPU.

See the full documentation for LLMs at: https://threejs.org/docs/llms.txt

Business model

open-source

Free, MIT-licensed open source JavaScript 3D library; no paid tiers, no vendor — 12.2M weekly npm downloads of the `three` package.

pricing ↗

Score trend

How this product’s scores have moved as evidence and verdicts are re-derived — a point per change, not per day.

PA Scoretracked since Sep 15 '26 — no movement recorded yet
Agent-readytracked since Sep 15 '26 — no movement recorded yet

Try Experimental

Run it in the microterminal →

Recorded agent sessions — and a live MCP handshake where the vendor ships one.

Flag

⚑ Flag a verdict

Think a verdict is wrong? Opens a prefilled GitHub issue — or use the ⚑ next to any verdict above.

Badge

Embed this product's score badge →

Hotlinked SVG — always shows the live current score.

For agents

Data